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EDITOR-IN-CHIEF:Sutarno

EDITORIAL MEMBERS:English Editors: Graham Eagleton (grahameagleton@gmail.com), Suranto(surantouns@gmail.com); Technical Editor & Banking: Artini Pangastuti(pangastuti_tutut@yahoo.co.id), Solichatun (solichatun_s@yahoo.com);Distribution & Marketing: Rita Rakhmawati (oktia@yahoo.com);Webmaster: Ari Pitoyo (aripitoyo@yahoo.co.id)

MANAGING EDITORS:Ahmad Dwi Setyawan (unsjournals@gmail.com)

EDITORIAL BOARD (COMMUNICATING EDITORS):

Abd Fattah N. Abd Rabou, Islamic University of Gaza, PalestineAgnieszka B. Najda, University of Life Sciences in Lublin, Lublin, Poland Ajay Kumar Gautam, Abhilashi University Mandi, Himachal Pradesh,IndiaAnnisa, Padjadjaran University, Sumedang, IndonesiaAlan J. Lymbery, Murdoch University, Perth, Australia Bambang Hero Saharjo, Institut Pertanian Bogor, Bogor, Indonesia Daiane H. Nunes, State University of Londrina, Londrina, Brazil Darlina Md. Naim, University Sains Malaysia, Penang, MalaysiaGhulam Hassan Dar, Sher-e-Kashmir University of Agricultural Sciencesand Technology of Kashmir, Srinagar, India Hassan Pourbabaei, University of Guilan, Somehsara, Guilan, Iran Joko Ridho Witono, Center for Plant Conservation-Bogor BotanicalGardens, Indonesian Institute of Sciences, Bogor, IndonesiaKartika Dewi, Research Center for Biology, Indonesian Institute ofSciences, Cibinong, Bogor, IndonesiaKatsuhiko Kondo, University of Missouri, Columbia, USAKusumadewi Sri Yulita, Research Center for Biology, IndonesianInstitute of Sciences, Cibinong, Bogor, IndonesiaLivia Wanntorp, Naturhistoriska riksmuseet, Stockholm, Sweden M. Jayakara Bhandary, Government Arts and Science College, Karwar,Karnataka, IndiaMahdi Reyahi-Khoram, Islamic Azad University (Hamadan Branch),Hamadan, Iran Mahendra Kumar Rai, SGB Amravati University, Maharashtra, India Mahesh K. Adhikari, Adhikari Niwas, Kathmandu, Nepal Maria Panitsa, University of Patras, Agrinio, Greece Mochamad A. Soendjoto, Lambung Mangkurat University,Banjarbaru, Indonesia Mohamed M.M. Najim, University of Kelaniya, Kelaniya, Sri Lanka Mohib A. Shah, Nepean Telehealth Technology Centre, Sydney,Australia Nurhasanah, Mulawarman University, Samarinda, IndonesiaPraptiwi, Research Center for Biology, Indonesian Institute of Sciences,Cibinong, Bogor, IndonesiaRasool B.Tareen, University of Balochistan, Quetta, PakistanSeyed Aliakbar Hedayati, Gorgan University of Agricultural Sciencesand Natural Resources, Iran

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Biodiversitas Vol. 21, No. 3, March 2020

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Table of Content

Cover [PDF]Editorial Board & Guidance for Authors [PDF]

1. Traditional agro-management practices, utilization and nutritional composition of momala: A local maize varietyof Gorontalo, IndonesiaNOVRI YOULA KANDOWANGKO, MARGARETHA SOLANG, ERNA RETNAWATY [PDF]

2. Potency of aloe extract as immunostimulant for carp (Cyprinus carpio) against Aeromonas salmonicidaSRI ANDAYANI, M. SULAIMAN DADIONO, WIDYA TRI ELWIRA, FEBBY HADI SETYAWAN [PDF]

3. Ex-situ population of White-rumped Shama (Copsychus malabaricus): studies of density, distribution and birdkeepers in Bengkulu, SumatraHERI DWI PUTRANTO, BIENG BRATA, YOSSIE YUMIATI [PDF]

4. Floristic diversity and demographic structure of the Sidi R'Ghies forest, north-eastern of AlgeriaMALIKA RACHED-KANOUNI, KARIMA KARA, HICHEM KHAMMAR, LABED ABABSA [PDF]

5. Morphological variations and phylogenetic analysis of Oryzias nigrimas Kottelat, 1990 (Rice fish) from Lake Poso,Central Sulawesi, IndonesiaNOVALINA SERDIATI, DIANA ARFIATI, MAHENO SRI WIDODO, TRI JOKO LELONO, SAMLIOK NDOBE, RUDYSARANGA [PDF]

6. The egg characteristics of malon broiler, Japanese quails and their crossENDANG SUJANA, ASEP ANANG, IWAN SETIAWAN, TUTI WIDJASTUTI [PDF]

7. Physical and chemical characteristic of stem starch and sheath flour from oil palm tree (Elaeis guineensis)SYARIFAH YUSRA, YUDI PRANOTO, Chairil Anwar, CHUSNUL HIDAYAT [PDF]

8. Coat protein gene of a PStV-Bm isolate from West Nusa Tenggara, IndonesiaNUR INDAH JULISANIAH, SUHARJONO, RETNO MASTUTI, ESTRI LARAS ARUMINGTYAS [PDF]

9. Environmental factors influence on flowering and fruiting period of selected essential oil plants from AnnonaceaeDEWI AYU LESTARI, ABBAN PUTRI FIQA [PDF]

10. Temporal overlap of carnivorous mammal community and their prey in Khao Ang Rue Nai Wildlife Sanctuary,Chachoengsao Province, ThailandRONGLARP SUKMASUANG, KHWANRUTAI CHARASPET, JITTIMA REONTIK, MANANYA PLA-ARD [PDF]

11. Morphometric diversity and phenotypic relationship among indigenous buffaloes of Banten, IndonesiaDEWI MURNI, UMIE LESTARI, SRI ENDAH INDRIWATI, ACHMAD EFENDI, NANI MARYANI, MOHAMAD AMIN[PDF]

12. Short communication: The genotype of growth hormone gene that affects the birth weight and average dailygain in crossbred beef cattleTETY HARTATIK, AHMAD FATHONI, SIGIT BINTARA, ISMAYA, PANJONO, B.P. WIDYOBROTO, ALI AGUS, IGS.BUDISATRIA, PASCAL LEROY [PDF]

13. Identification of active compounds and antioxidant activity of teak (Tectona grandis) leavesVENTY SURYANTI, TRIANA KUSUMANINGSIH, SOERYA DEWI MARLIYANA, HILDA ALFIANI SETYONO, ELYNAWAHYU TRISNAWATI [PDF]

14. Nutritional values of swamp grasses as feed for Pampangan Buffaloes in South Sumatra, IndonesiaMUHAKKA, RUJITO AGUS SUWIGNYO, DEDIK BUDIANTA, YAKUP [PDF]

15. Molecular characterization of lactic acid bacteria producing edible biofilm isolated from kimchiFADILLA SAPALINA, ENDAH RETNANINGRUM [PDF]

16. Ultrastructure of royal palm (Roystonea regia) leaf sheathULFA ADZKIA, NARESWORO NUGROHO, ISKANDAR Z. SIREGAR, LINA KARLINASARI [PDF]

17. Screening and characterization of sponge-associated bacteria from Seribu Island, Indonesia producing cellulaseand laccase enzymesWENANG MAHARSIWI, RIKA INDRI ASTUTI, ANJA MERYANDINI, ARIS TRI WAHYUDI [PDF]

Biodiversitas

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18. Direct economic benefits and human dependence toward Gunung Merapi National Park, IndonesiaRUKY UMAYA, HARDJANTO, RINEKSO SOEKMADI, SATYAWAN SUNITO [PDF]

19. Molecular identification of amylase-producing thermophilic bacteria isolated from Bukit Gadang Hot Spring, WestSumatra, IndonesiaAULIA ARDHI, ARINA NADENGGAN SIDAURUK, NABELLA SURAYA, NOVA WAHYU PRATIWI, USMAN PATO,SARYONO [PDF]

20. Biodiversity of Enterobacteriaceae on masin (fermented sauce) from Sumbawa, West Nusa Tenggara, IndonesiaBASO MANGUNTUNGI, DINAR S. SAPUTRI, CHAIRUL A. AFGANI, APON Z. MUSTOPA, FATIMAH, AMIRINKUSMIRAN [PDF]

21. Short Communication: Characterization of Rhizoctonia-like mycorrhizae associated with five Dendrobium speciesin Java, IndonesiaR. SOELISTIJONO, D.S. UTAMI, DARYANTI, M. FAIZIN, R. DIAN [PDF]

22. Plankton biodiversity in various typologies of inundation in Paminggir peatland, South Kalimantan, Indonesia ondry seasonYUNANDAR, HEFNI EFFENDI, WIDIATMAKA, YUDI SETIAWAN [PDF]

23. The The diversity and abundance of Hymenoptera insects on tidal swamp rice field in Indragiri Hilir District,IndonesiaZAHLUL IKHSAN, HIDRAYANI, YAHERWANDI, HASMIANDY HAMID [PDF]

24. Morphometric variations of Asian Common Palm Civet (Paradoxurus hermaphroditus, Pallas 1777) from BaliIsland, Indonesia as the basis of morphometrics diversity dataARIS WINAYA, MAFTUCHAH, CARLA MOROS NICOLÃS, DWI PRASETYO [PDF]

25. The diversity of leaves and asiaticoside content on three accessions of Centella asiatica with the addition ofchicken manure fertilizerHAPPY MARATUL MUMTAZAH, YULI WIDYASTUTI, SUPRIYONO, AHMAD YUNUS [PDF]

26. Comparing morphological traits of legs of understory birds inhabiting forest areas with closed canopies and forestgapsSUPALAK SIRI, YUWADEE PONPITUK, MONGKOL SAFOOWONG, WIMONMART NUIPAKDEE, DOKRAK MAROD,PRATEEP DUENGKAE [PDF]

27. Avian diversity in geothermal power plant areas: Case studies in Kamojang, Darajat, and Gunung Salak, WestJava, IndonesiaTEGUH HUSODO, KHEMAL PASHA MOCHTAN, SYA SYA SHANIDA, SYAHRAS FATHIN AMINUDDIN, INDRIWULANDARI, IRWANANDA SATRIA PUTRA, ERRI NOVIAR MEGANTARA [PDF]

28. Short Communication: Optimization of extraction of sulfhydryl compounds from several legumes seeds inIndonesia with various ethanol concentrationsSRI WARDATUN, YAHDIANA HARAHAP, ABDUL MUN’IM, NOORWATI SUTANDYO [PDF]

29. Morphological and agronomical characters of four black rice varieties from West Kalimantan, IndonesiaTANTRI PALUPI, FRANKY PANGARIBUAN, HEARNES, FADJAR RIYANTO, WASIAN, DWI ZULFITA [PDF]

30. Temporal effects of cutting intensity on Diptera assemblages in eastern Borneo rainforest IndonesiaAHMAD BUDIAMAN, NOOR FARIKHAH HANEDA, INDAHWATI, DINI FEBRIAN, LAELA NUR RAHMAH [PDF]

31. Anatomical features and SCoT profiles provide new insight into phenotypic plasticity in the halophyte Suaedamaritima in ThailandKANOKPHORN RITTIRONGSAKUL, ANITTHAN SRINUAL, ONGKARN VANIJAJIVA [PDF]

32. The growth, pilodyn penetration, and wood properties of 12 Neolamarckia cadamba provenances at 42 monthsoldNELLY ANNA, SUPRIYANTO, LINA KARLINASARI, DEDE J. SUDRAJAT, ISKANDAR Z. SIREGAR [PDF]

33. Genetic diversity analysis of yardlong bean genotypes (Vigna unguiculata subsp. sesquipedalis) based on IRAPmarkerMUHAMMAD HABIB WIDYAWAN, SRI WULANDARY, TARYONO [PDF]

34. Morpho-molecular identification and pathogenicity test on fungal parasites of guava root-knot nematode eggs inLampung, IndonesiaI GEDE SWIBAWA, YUYUN FITRIANA, SOLIKHIN, RADIX SUHARJO, F.X. SUSILO, EKA RANI, MEI SRI HARYANI,RACHMANSYAH A. WARDANA [PDF]

35. Stomata cells studies of Paraphalaenopsis spp. from in vitro and greenhouse conditionR. VITRI GARVITA, HARY WAWANGNINGRUM [PDF]

36. Vegetation analysis, physico-chemical properties and economic potential of damar (Agathis dammara) in MountHalimun Salak National Park,West Java, IndonesiaYELIN ADALINA, RENY SAWITRI [PDF]

37. Short Communication: Population structure and habitat characteristics of Goniothalamus macrophyllus in BukitPembarisan forest, West Java, IndonesiaILHAM ADHYA, PUDJI WIDODO, CECEP KUSMANA, EMING SUDIANA, IMAM WIDHIONO, TOTO SUPARTONO[PDF]

38. Methylene blue decolorizing bacteria isolated from water sewage in Yogyakarta, IndonesiaMICHELLE, RACHEL ARVY NABASA SIREGAR, ASTIA SANJAYA, JAP LUCY, REINHARD PINONTOAN [PDF]

39. Harvesting trends of Amboina box turtles (Cuora amboinensis) seventeen years after listing in Appendix II CITESMUHAMMAD ALIF FAUZI, AMIR HAMIDY, NIA KURNIAWAN [PDF]

40. Diversity and distribution of microalgae in coastal areas of East Java, IndonesiaUMI ZAKIYAH, MULYANTO, LUCIA TRI SUWANTI, MOCHAMAD DONNY KOERNIAWAN, EKO AGUS SUYONO,ARIEF BUDIMAN, ULFAH JUNIARTI SIREGAR [PDF]

Biodiversitas

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41. Short Communication: Adoption level of indigenous communities on agricultural technology in East Kalimantan,Indonesia: Problem and adaptive solutionsNDAN IMANG [PDF]

42. Comparative and competitive advantages of nutmeg farming in two regions in Maluku Province, IndonesiaTIENNI MARIANA SIMANJORANG, IRHAM, LESTARI RAHAYU WALUYATI, JANGKUNG HANDOYO MULYO [PDF]

43. Genetic variation and phylogenetic relationships of Thelymitra javanica (Orchidaceae: Orchidoideae) in East andCentral Java, IndonesiaI MADE SAKA WIJAYA, BUDI SETIADI DARYONO, PURNOMO [PDF]

44. Diversity of gall-inducing insect associated with a superhost plant species: Plant architecture, resource availabilityand interspecific interactionsMARCILIO FAGUNDES, ÉLLEN MARIANE LOPES SANTOS, KAREN LUIZA RODRIGUES DUARTE, LARISSAMENDES SANTOS, JAQUELINE SILVA VIEIRA, CIRILO HENRIQUE DE OLIVEIRA, PRISCILA SOUSA SILVA [PDF]

45. Short communication: Effects of the various source areas of Indonesian bay leaves (Syzygium polyanthum) onchemical content and antidiabetic activityINDAH DWIATMI DEWIJANTI, WIBOWO MANGUNWARDOYO , ASTARI DWIRANTI, MUHAMMAD HANAFI, NINAARTANTI [PDF]

46. Short Communication: Proximate analysis, amino acid profile and albumin concentration of various weights ofGiant Snakehead (Channa micropeltes) from Kapuas Hulu, West Kalimantan, IndonesiaWAHYU WIRA PRATAMA, HAPPY NURSYAM, ANIK MARTINAH HARIATI, R. ADHARYAN ISLAMY, VERYL HASAN[PDF]

47. Diversity, consumption dynamics and ethnomedical claims of traditional leafy vegetables consumed by a ruralcommunity in the KwaMbonambi area, northern KwaZulu-Natal, South AfricaN.C. MNCWANGO, S. MAVENGAHAMA, N.R. NTULI, C.M. VAN JAARSVELD [PDF]

48. Genetic diversity of local corn (Zea mays) cultivars from South Amarasi, Kupang District, Indonesia by InterSimple Sequence Repeats markerUSLAN, NUR JANNAH/font> [PDF]

49. Short communication: The crustaceans fauna from Natuna Islands (Indonesia) using three different samplingmethodsRIANTA PRATIWI, DEWI ELFIDASARI [PDF]

50. Short Communication: DNA barcodes and phylogenetic of striped snakehead and ocellated snakehead fish fromSouth Sumatra, IndonesiaMOCHAMAD SYAIFUDIN, MARINI WIJAYANTI, SEFTI HEZA DWINANTI, MUSLIM, MUHAMMAD MAHENDRA,SHELY MARLIANA [PDF]

51. Optimization and characterization of enterocin Enterococcus faecalis K2B1 isolated from Toraja’s BelangBuffalo Milk, South Sulawesi, IndonesiaHASRIA ALANG, JONI KUSNADI, TRI ARDYATI, SUHARJONO [PDF]

52. Short Communication: Sarocladium oryzae associated with sheath rot disease of rice in IndonesiaSYAFIQA PRAMUNADIPTA, ANI WIDIASTUTI, ARIF WIBOWO, HARUHISA SUGA, ACHMADI PRIYATMOJO [PDF]

53. Local indigenous strategy to rehabilitate and conserve mangrove ecosystem in the southeastern Gulf of Kupang,East Nusa Tenggara, IndonesiaRONGGO SADONO, DJOKO SOEPRIJADI, ARI SUSANTI, JERIELS MATATULA, EKO PUJIONO, FAHMI IDRIS,PANDU YUDHA ADI PUTRA WIRABUANA [PDF]

54. Impact of green revolution on rice cultivation practices and production system: A case study in Sindang Hamlet,Rancakalong Village, Sumedang District, West Java, IndonesiaRAHMI AULIA HIDAYAT, JOHAN ISKANDAR, BUDHI GUNAWAN, RUHYAT PARTASASMITA [PDF]

55. Morphological diversity, total phenolic and flavonoid content of Echinacea purpurea cultivated in Karangpandan,Central Java, IndonesiaDWI FAJAR SIDHIQ, YULI WIDIYASTUTI, DYAH SUBOSITI, BAMBANG PUJIASMANTO, AHMAD YUNUS [PDF] Print on demand [PDF]

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Seyed Mehdi Talebi, Arak University, IranShahabuddin, Universitas Tadulako, Palu, Indonesia Shahir Shamsir, Universiti Teknologi Malaysia, Skudai, MalaysiaShri Kant Tripathi, Mizoram University, Aizawl, India Sugeng Budiharta, Purwodadi Botanical Gardens, Indonesian Instituteof Sciences, Pasuruan, IndonesiaSugiyarto, Universitas Sebelas Maret, Surakarta, Central Java, Indonesia Subash C. Santra, University of Kalyani, India Taufiq Purna Nugraha, Research Center for Biology, IndonesianInstitute of Sciences, Cibinong, Bogor, IndonesiaYosep S. Mau, Nusa Cendana University, Kupang, Indonesia

ISSN 1412-033X | E-ISSN 2085-4722

PUBLISHER: Society for Indonesian Biodiversity

CO-PUBLISHER: Department of Biology, FMNS, Sebelas Maret UniversitySurakarta

FIRST PUBLISHED: 2000

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Sebelas Maret UniversityJl. Ir. Sutami 36A Surakarta 57126. Tel. +62-271-7994097, Tel. & Fax.:+62-271-663375, email: editors@smujo.id

ONLINE: biodiversitas.mipa.uns.ac.id

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BIODIVERSITAS ISSN: 1412-033X Volume 21, Number 3, March 2020 E-ISSN: 2085-4722 Pages: 1149-1159 DOI: 10.13057/biodiv/d210340

Diversity and distribution of microalgae in coastal areas of East Java,

Indonesia

UMI ZAKIYAH1 ♥, MULYANTO1, LUCIA TRI SUWANTI2, MOCHAMAD DONNY KOERNIAWAN3,

EKO AGUS SUYONO4, ARIEF BUDIMAN5, ULFAH JUNIARTI SIREGAR6,♥♥ 1Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, Universitas Brawijaya. Jl. Veteran Malang 65145, East Java,

Indonesia. Tel/fax.: +62-341-553512, Fax.: +62-341-556837, email: umi.zakiyah@gmail.com 2Department of Veterinary Parasitology, Faculty of Veterinary Medicine, Universitas Airlangga. Jl. Mulyorejo, Kampus C Unair, Surabaya 60115, East

Java, Indonesia 3Department of Architecture, School of Architecture, Planning, and Policy Development, Institut Teknologi Bandung. Jl. Ganesha No. 10, Bandung

40132, West Java, Indonesia 4Faculty of Biology, Universitas Gadjah Mada, Jl. Teknika Selatan, Sleman 55281, Yogyakarta, Indonesia

5Department of Chemical Engineering, Faculty of Engineering, Universitas Gadjah Mada, Jl. Grafika 2, Sleman 55281, Yogyakarta, Indonesia 6Department of Silviculture, Faculty of Forestry, Institut Pertanian Bogor. Jl. Lingkar Akademik, Dramaga, Bogor 16680, West Java, Indonesia.

Tel.:+62-251-8626806, Fax.: +62-251-8621256, email: ulfahjs@apps.ipb.ac.id

Manuscript received: 29 November 2019. Revision accepted: 21 February 2020.

Abstract. Zakiyah U, Mulyanto, Suwanti LT, Koerniawan MD, Suyono EA, Budiman A, Siregar UJ. 2020. Diversity and distribution of microalgae in coastal areas of East Java, Indonesia. Biodiversitas 21: 1149-1159. Indonesia is well known as one of hotspot for

biodiversity, including marine resources. However, Indonesia biodiversity has declined rapidly due to the changes in the aquatic environmental quality as the consequence of human activities. Biodiversity loss has been well studied in larger organisms, however, less is known for microorganisms, such as microalgae. Microalgae have received much attention recently due to its potential as renewable energy sources. This study aimed at describing biodiversity and distribution of microalgae in coastal areas of East Java and Madura, Indonesia. Six sites, i.e. Trenggalek and Sendangbiru representing south coast, Banyuwangi and Situbondo representing north coast of East Java, Pasongsongan and Pamekasan representing Madura north and south coast, respectively were sampled, which representing different background of anthropogenic development in these areas. Results showed that seawater condition in all sites is still good, with average pH 8.0 despite intense human activities, such as ecotourism, fishing and boat harbor, as well as residential area that has the

potential to produce a lot of waste. Totally, there were 35 genera from all locations with varying abundance in each location and diversity index ranging from 1.105-3.312. Although most genera belonged to Bacyllariophyta, domination indices showed that there was not any single specific domination in all locations. Morisita indices showed that most distribution gave positive values indicating clumped dispersion of microalgae in all locations. Higher Shannon-Weaver indices characterized the south coast of East Java and Madura compared to the north coast of East Java area, which corresponded with lower dominancy indices.

Keywords: Biodiversity, East Java, Madura, microalgae

INTRODUCTION

Indonesia has about 2/3 of its territory as sea and is well

known as one of mega-diversity spots in the world.

However rapid increasing population and unsustainable

utilization of its natural resources have resulted in rapid

decline of its biodiversity. Biodiversity loss has been well

studied in larger organisms, in terrestrial areas, however

little is known for microorganisms, even less in marine areas, such as microalgae (Suyono et al. 2016). Microalgae

have recently received much attention due to its role as

primary producers and its high potential source of

renewable energy (Chisti 2007; Prartono et al. 2010).

Many publications have reported efforts to mass-

cultivate microalgae with various manipulation to produce

bio-oil for renewable energy and other side products.

Microalgae is a unicellular organism, which exists as a

single cell or a group of cells in both freshwater and marine

ecosystem. Their biodiversity is enormous, while only a

fraction has been characterized. Since these organisms produce biomass and provide energy for all organisms

above them, their potential to produce bioenergy is very

high per cubic space (Singh and Gu 2010). Microalgae

potential application also includes production of food

supplements and cosmetics, especially astaxanthin (Ponce-

Palafox et al. 2006). Therefore it is necessary to explore

further their capability to produce biomass and other

compounds in the culture of microalgae. In autotrophic

microalgae cultivation supply of carbon dioxide must be

continuous. However, to achieve a significant result, the

most crucial issue using microalgae in biofuels production

is mainly the high cost regarding the mass-culture for

biomass growth (Riberio and Pereira da Silva 2013). In order to get more economically feasible production a more

efficient technological innovation is needed.

Microalgae as source of third generation of biofuel

could potentially bypass any problems found in the

previous generation of biofuels using technology available

today (Alaswad et al. 2015). Among microalgae species

considered to be alternative energy sources for biofuels are

Chlorella sp, Scenedesmus sp. Dunaliella sp, Spirulina sp,

and Botryococcus braunii (Amini and Susilowati 2010).

BIODIVERSITAS 21 (3): 1149-1159, March 2020

1150

Microalgae are easily cultivated, requiring only basic

nutrients and enough light to conduct photosynthesis and

produce various products in large amounts over short

periods of time (Ali et al. 2014). Microalgae lipids can be

processed into biofuels, while other valuable co-products

are valuable sources for food and antioxidants. The

availability of microalgae species that can be cultured to

meet the need for biofuel production from a mass culture

becomes crucial (Dong et al. 2016) However, exploration of

the available species from both fresh and marine environments should be conducted previously. The on going research on

the newly found species regarding their composition that

has close relation with biofuels production should become

the next issues to be executed and finally, the selected

species can be generated to produce valuable bio and co-

products in massive culture. This study aimed to describe

biodiversity and distribution of microalgae in coastal areas

of East Java and Madura, Indonesia.

MATERIALS AND METHODS

Sampling locations

The locations of this research were six different coastal areas of East Jawa Province, Indonesia (Figure 1) including

Sumenep (SUM) and Pamekasan (PAM), Situbondo (ST),

Banyuwangi (BW), Sendang Biru (SD), and Trenggalek

(TG) (Figure. 1 to 7). In every regency, the samples were

taken from coastal areas in two site stations i.e. station 1

(PL 1) and station 2 (PL 2). These areas were chosen due to

their differences in landuse of the surrounding areas,

which were, fish landing harbor (Malang and Situbondo)

that presumably can make a pollution from fisherman's

ship fuel residue, Ecotourism areas that created many trash

from the tourists such as plastics wastes (Trenggalek and

Banyuwangi) and boat harbor as well as municipalities that

created a mixed pollution such a fuel residue and

household waste at the same time (Sumenep and

Pamekasan). These different backgrounds were assumed to

have high impact on the water quality observed in all the

parameters, i.e. temperature, salinity, pH, nitrate,

phosphate, and silicate content as well, that affect the microalgae biodiversity in the seawater. This research was

conducted in April and May 2019 by collecting seawater

from each station of each location, followed by sieving

microalgae in situ. The water quality parameters i.e.

temperature, salinity, and pH were also recorded in situ.

Water quality analysis

Water samples were taken using polyethylene 1 L bottle

samples. Water quality parameters such as pH were

measured using pH-meter, salinity using refractometer

while temperatures using mercury-based thermometer. The

1000 mL of water samples were kept in a cool condition

(about 4oC) and transported to the Laboratorium

Hydrobiology in Faculty of Fisheries and Marine Sciences,

Faculty of Fisheries and Marine Science, Brawijaya

University, Malang. for analysis. Parameters such as

phosphate and nitrate were analyzed using colorimetric

specification with UV-Vis Spectrometry methods (Bengen

2000). Silicate was analyzed using spectrophotometry (APHA

2005), while other parameters such as temperature, salinity,

pH (APHA 2005) were measured in situ.

Figure 1. Map of the six research locations of East Java coastal area that represenated by 6 different coastal city areas i.e. Pasongsongan Beach in Sumenep (SUM), Branta Beach in Pamekasan (PAM), Blekok Beach in Situbondo (ST), Bangsring Beach in Banyuwangi (BW), Sendang Biru Beach in South of Malang (SB), and Simbaronce Beach in Trenggalek (TG)

ZAKIYAH et al.-Biodiversity and distribution of microalgae

1151

A B C

D E F

Figure 2 to 7. Map of two sampling stations in each of six research sites in East Java, Indonesia coastal area: A. Sumenep (Pasongsongan Beach), B. Pamekasan (Branta Beach), C. Situbondo (Blekok Beach), D. Banyuwangi (Bangsring Beach), E. South of Malang (Sendang Biru Beach), and F. Trenggalek (Simbaronce Beach)

Microalgae analysis

Microalgae were collected by sieving 100 L of seawater

using plankton nets with specification Wildco 45 um

Nitex® mesh (Effendi et al. 2016). These samples were

preserved using 1 mL of Lugol and kept in a cool box

while transferred to Laboratorium of Hydrobiology in

Faculty of Fisheries and Marine Sciences for identification

and analysis using a binocular microscope and

identification handbook (Perry 2003; Vuuren et al. 2006).

Microalgae density

The microalgae abundance were calculated based on

Lackey drop micro transect counting (APHA 2005) using

formula:

Where: N : Plankton abundance (ind/l) Oi : Area of cover glass (324 mm2) Op : Area of field of view (1,11279 mm2)

Vr : Sample bottle volume (250 mL)

Vo : Volume drop pipettes (0,05 mL)

Vs : Sieved water Volume by Plankton Net (100 l)

n : Numbers of Plankton counted

p : Amount of field of view (50)

Data analysis

Data on water quality was put on and analyzed using

Excel spreadsheet. Species richness was calculated from

the total number of species found in a certain population.

On the other hand, dominance indices were calculated

using the following formula (Odum 1971):

Where:

C : Dominance index

Pi : Proportion of individual i : 1,2,3 …s

Biodiversity index was estimated using Shannon-

Weaver assuming randomly sampled individual species

from a large population (APHA 2005) using formula as

follow:

Where:

H’ = Shannon-Weaver diversity index

S= total species

Pi = Relative abundance of each species (ni/N)

According to Prawiradilaga et al. (2003), the criteria for

this diversity index are:

H’ < 1 considered low; 1< H’ < 3 is in the middle,

H’ > 3 is high

BIODIVERSITAS 21 (3): 1149-1159, March 2020

1152

In order to determine the dispersion of each species in

the aquatic environment, the distribution pattern can be

observed using the Morisita Index (Id) with the following

formula :

Where:

n : total sample size

Xi : number of species

The value of the Morisita index is between -1 to +1

which can be described as the closer the value to +1 the

distribution tends to be clumping.

RESULTS AND DISCUSSION

Water quality measurements

Based on the result of the water quality measurement

(Figure 8 and 9), most of these six areas shown similar

values, however in terms of salinity, south coastal areas represented by South of Malang and Trenggalek had

relatively lower salinity compare to the north of East Java

coastal area. These conditions most probably were due to

the station located on the south coast, which is in Sempu

Island strait, that it is more affected by the runoff from the

mainland compared to the station in north coast of East

Java, which is located in more open sea. Concentration of

nitrates and phosphates were relatively low in all locations

except in Sumenep and South Malang coastal areas, which

gave consequences more genera were found in these

locations. Nutrients have a close relationship with

microalgae abundance, especially nitrates and phosphates.

The increase in microalgae abundance is generally directly

proportional to the increase in nutrients. However, if the

nutrient is too high it can cause the unbalanced

composition of the microalgae and bloom of one species of

microalgae.

Composition and distribution of microalgae

Based on the microalgae analysis from the six research

locations in East Java coastal areas, 35 genera of microalgae were found and most of these genera were

belong to division of Bacyllariophyta (22 genera) while

another 13 belonged to Dinoflagellata (10 genera),

Chlorophyta (1 genus), Ochrophyta (1 genus ) and

Granuloreticulosa (1 genus). However, each sub-region that

represented by 6 cities around the East Java Province,

which were, Sumenep (Pasongsongan Beach), Pamekasan (

Branta Beach), Situbondo (Blekok Beach), Banyuwangi

(Bangsring Beach), Trenggalek (Prigi Beach), South of

Malang (Sendang Biru Beach) showed different

composition of genus and abundance of microalgae at the study location. the Bacyllariophyta group has the highest

number of composition and abundance of microalgae as

presented in (Table 1) below. Among these 35 genera

found in this research, 70 % were found in all locations,

another 30% existed in different locations. This means the

composition and distribution of all microalgae found had

70% similarity in all six locations around the East Java

coastal areas. Furthermore, the differences among locations

were only 30 %. Most of genus that exists in all of

locations were mostly belong to Bacyllariophyta division.

Figure 8. Water Quality parameter (Phosphates, Nitrates, and Si)

in Sumenep (Pasongsongan Beach) with station 1 (SUM PL1) and station 2 (SU PL2), Pamekasan ( Branta Beach) with station 1 (PAM PL1) and station 2 (PAM PL2), Situbondo (Blekok Beach) with station 1 (ST PL1) and station 2 (ST PL2), Banyuwangi (Bangsring Beach) with station 1 (BW PL1) and station 2 (BW PL2), South of Malang (Sendang Biru Beach) with station 1 (SD PL 1) and station 2 (SD PL 2), and Trenggalek (Simbaronce Beach) with station 1 (TG PL1) and station 2 (TG PL2)

Figure 9. Water Quality parameter (Phosphates, Nitrates, and pH) in Sumenep (Pasongsongan Beach) with station 1 (SUM PL1) and station 2 (SUM PL2), Pamekasan ( Branta Beach) with station 1

(PAM PL1) and station 2 (PAM PL2), Situbondo (Blekok Beach) with station 1 (ST PL1) and station 2 (ST PL2), Banyuwangi (Bangsring Beach) with station 1 (BW PL1) and station 2 (BW PL2), South of Malang (Sendang Biru Beach) with station 1 (SD PL1) and station 2 (SD PL 2), and Trenggalek (Simbaronce Beach) with station 1 (TG PL1) and station 2 (TG PL2)

ZAKIYAH et al.-Biodiversity and distribution of microalgae

1153

Figure 10. Abundance of microalgae found in sampling location stations: (SUM PL1), (SU PL2), (PAM PL1) and (PAM PL2)

representing Madura coast; (ST PL1), (ST PL2), (BW PL1) and (BW PL2) representing Java north coast; (SD PL 1), (SD PL 2), (TG PL1) and (TG PL2) representing Java south coast

Figure 10 shows that Branta Beach of Pamekasan

(PAM PL1 and PAM PL2) possessed more microalgae

abundance and composition compare to Pasongsongan

Beach of Sumenep (SUM PL1 and SUM PL2). The reason

might be due to Pamekasan stations are facing Madura

strait, while Sumenep stations are facing Java sea. Madura

strait is commonly influenced by nutrient upload from east

region of Java Island, while the other around Java sea is an

open sea. Furthermore, microalgae abundance in Blekok

Beach of Situbondo, especially ST PL2, was higher compared to others in Sumenep, Banyuwangi, South

Malang and Trenggalek coastal area. This is due to in

Blekok Beach, Situbondo regency, there are many fishery

activities as well as the existing mangrove ecosystem in the

surrounding area, which believed to have high impact on

the surrounding areas compared to Bangsring Beach in

Banyuwangi, which is relatively close to open Java sea.

Microalgae abundance in both stations at Sendang Biru of

South Malang and Simbaronce Beach of Trenggalek which

are facing the Indian Ocean had relatively similar low

values. The lowest abundance value of microalgae was

found at Simbaronce Beach, Trenggalek station 1 (TG PL1) with 98 cell/mL, while the highest was at Blekok

Beach Situbondo station 2 (ST PL2) with 324114 cell/mL.

Microalgae abundance higher than 20x104 cell/mL is

commonly considered as a bloom. The differences in the

microalgae abundance are most probably due to different

nutrient upload, fishery activities and existing mangrove

ecosystems in the area.

Relative density of microalgae

The result of microalgae density estimation of the six

different research locations in East Java coastal areas that

were represented by Sumenep (Pasongsongan Beach), Pamekasan ( Branta Beach), Situbondo (Blekok Beach),

Banyuwangi (Bangsring Beach), Trenggalek (Simbaronce

Beach), South of Malang (Sendang Biru Beach), showed

that different area has different composition, as shown

below (Table 2). Different stations in the same area proved

to have different biodiversity. The differences that exist in

every station presumably due to different land use

surrounding the station as well as the nutrient that exist in

the water such as nitrate (Setiapermana 2006). The

differences in nitrate concentration in waters may cause

differences in phytoplankton abundance. In addition,

increase and growth of phytoplankton population in waters

are related to nutrient availability and light (Meiriyani et al.

2011).

Biodiversity indices

Estimation of the diversity indices found in these six research locations around the East Java Province showed

that several locations, such as surrounding Madura Island

and south coastal areas of Java Island possessed relatively

higher values compared to others. These index values can

be seen in Figure 11 below. The values of microalgae

diversity index from all research locations were the

opposite of the dominance values in general. When the

dominance indices of the microalgae were relatively low,

the diversity would be high. Locations with higher value of

dominance (Figure 12) have corresponding lower diversity.

This fact of dominance most probable will lead to or indicate increasing eutrophication.

Microalgae dominancy

Coastal area commonly was dominated by microalgae

from division Bacillariophyta and Dynophyta, which well

known as diatom, as well as Chlorophyta that made the

aquatic environment become green or reddish. Dominancy

of certain microalgae such as Cerratium sp. and Peridinum

sp. can indicate that this area experiencing

eutrophication.

The domination index values are showing the level of

domination of the genus found from the analysis. As shown in Figure 12 the values are between 0 and 3, meaning that

the increasing values indicate domination of certain genus

exists and this condition can be used as an early indicator

of blooming of the microalgae. However, the microalgae

blooming will only occur in the aquatic environment when

heavy eutrophication exists. Although domination index for

all the research locations was not exceeded the value of 1

which means that there was no domination in all research

locations, however, Situbondo and Banyuwangi stations

had higher values compared to other locations, indicating

domination of some genus had started.

The Morisita indices from all locations presented in Figure 13, shows all are positive, indicating clumped

dispersion of microalgae. The highest value was in

Bangsring Beach, Banyuwangi coastal area and Blekok

Beach at Situbondo coastal area, both representing Java

north coast, while the lowest was found in Pasongsongan

Beach, in Sumenep, Madura coast. The reason for higher

value was due to the Java north coast is situated inside a

bay (channel) between East Java and West Bali, which

made the phytoplankton relatively clumped. In the opposite

was phytoplankton/microalgae that were found in

Pasongsongan Beach, Sumenep, northern part of Madura Island, that facing open Jawa Sea, showed that the

distribution was relatively dispersed.

BIODIVERSITAS ISSN: 1412-033X Volume 21, Number 3, March 2020 E-ISSN: 2085-4722 Pages: 1149-1159 DOI: 10.13057/biodiv/d210340

Table 1. Abundance of Microalgae found in East Java, Indonesia coastal areas, i.e. Sumenep (Pasongsongan Beach) with station 1 (SUM PL1) and station 2 (SU PL2), Pamekasan ( Branta Beach) with station 1 (PAM PL1) and station 2 (PAM PL2), Situbondo (Blekok Beach) with station 1 (ST PL1) and station 2 (ST PL2), Banyuwangi (Bangsring Beach) with station 1 (BW PL1) and station 2 (BW PL2), South of Malang (Sendang Biru Beach) with station 1 (PL SD 1) and station 2 (PL SD 2), and Trenggalek (Simbaronce Beach) with station 1 (TG PL1) and station 2 (TG PL2)

Division Genus Microalgae abundance (Cell/mL)

SUM PL 1 SUM PL 2 PAM PL 1 PAM PL 2 TG PL1 TG PL2 SD PL1 SD PL2 STPL1 ST PL2 BW PL1 BW PL2

Bacillariophyta Achnanthes 1273.89 Asterionella 160.51 121.02 12738.85 1273.89 Amphiprora 2547.77 2547.77 8917.20 Amphora 2547.77 10191.08 2547.77 1273.89 3821.66 3821.66 1273.89 Bacteriastrum 19.11 47.13 133.76 127.39 3821.66 12738.85 14012.74 75159.24 219108.28 Biddulphia 3.82 10.19 1.27 16560.51 11464.97 1273.89 Cerataulina 131.21 109.55

Climacodium 1273.89 Climacosphenia 2547.77 1273.89 Chaetoceros 121.02 147.77 1342.68 1661.15 76433.12 256050.96 100636.94 38216.56 640764.33 694267.52 1491719.75 1634394.90 Coscinodiscus 15.29 15.29 5.10 7.64 8917.20 7643.31 3821.66 2547.77 5095.54 10191.08 3821.66 Cyclotella 11.46 6.37 2.55 1.27 14012.74 17834.39 5095.54 7643.31 3821.66 2547.77 Cymbella 7643.31 10191.08 7643.31 12738.85 3821.66 2547.77 Dictyiosolen 7.64 3.82 1.27 8917.20 8917.20 25477.71 26751.59 Diploneis 6369.43

Ditylum 3.82 7.64 3.82 Gyrosigma 3821.66 5095.54 Licmophora 3821.66 3821.66 Hemialus 14.01 26.75 2.55 2547.77 Hyalodiscus 3.82 2.55 Leptocylindrus - 5.10 30.57 6.37 - - - - - - 7643.31 6369.43 Lithodesmium - - - - - - - - - - 2547.77 1273.89 Melosira 15.29 2.55 - - - - - - - - - -

Navicula 2.55 10.19 5.10 1.27 35668.79 72611.46 10191.08 5095.54 10191.08 7643.31 1273.89 1273.89 Nitzschia 12.74 8.92 155.41 146.50 76433.12 179617.83 53503.18 24203.82 266242.04 363057.32 56050.96 43312.10 Pleurosigma 1.27 2.55 - 1.27 5095.54 7643.31 1273.89 - 5095.54 3821.66 - - Pinnularia 1.27 1.27 - - 11464.97 24203.82 2547.77 6369.43 6369.43 6369.43 - - Rhabdonema - - - - 3821.66 2547.77 1.27 - - - - - Rhizosolenia 12.74 20.38 429.30 629.30 7643.31 28025.48 6369.43 7643.31 11464.97 7643.31 10191.08 12738.85 Striatella - - - - - 1273.89 - - - - - - Surirella - - - - 8917.20 1273.89 - - - 1273.89 - - Skeletonema - - - - - - - - 3272611.46 4081528.66 26751.59 12738.85

Synedra 2.55 243.31 76.43 - 7643.31 - 1273.89 - 1273.89 2547.77 Thalassionema 25.48 136.31 84.08 71.34 - 7643.31 - - 43312.10 26751.59 5095.54 14012.74 Triceratium - - - - - - - - - 1273.89 - -

ZAKIYAH et al.-Biodiversity and distribution of microalgae

1155 Thalassiothrix 42.04 - - - -

Chlorophyta Cosmarium 3.82 3821.66

Gloeocystis 30573.25

Hydrodictyon 16560.51

Volvox 1273.89

Cyanophyta Oscillatoria 388.54 Spirulina 6.37 57.32 39.49

Dinoflagellata Ceratium 193.63 231.85 15.29 1273.89 7643.31 5095.54 12738.85 5095.54 7643.31 26751.59 35668.79 Ceratocorys 1273.89 2547.77 2547.77 Cladopysis 2547.77 2547.77

Dinophysis 2.55 3.82 1273.89 36942.68 150318.47 2547.77 2547.77 1273.89 Diplopsalis 14.01 15.29 1.27 8.92 1273.89 8917.20 12738.85 1273.89 Goniodoma 1.27 1273.89 10191.08 8917.20 Orinthocercus 40.76 20.38 2547.77 1273.89 Peridinium 8.92 25.48 1.27 5095.54 33121.02 11464.97 33121.02 17834.39 53503.18 12738.85 16560.51 Prorocentrum 22.93 2.55 5.10 1.27 7643.31 2547.77

Granuloreticulosa Globigerina 8917.20 20382.17 6369.43 7643.31 21656.05

Ochrophyta Amphiacon 1273.89 Triposolenia 1273.89 Dictyoacha 5.10 1273.89 1273.89 Rhizosphaera 6.37 2.55 2862.42 3039.49

Total

908.28 780.89 305732.48 769426.75 256050.96 337579.62 4352866.24 5327388.54 1777070.06 2053503.18

BIODIVERSITAS 21 (3): 1149-1159, March 2020

1156

Table 2. Relative Density of Microalgae found in sampling location station 1 (SUM PL1) and station 2 (SUM PL2), station 1 (PAM PL1) and station 2 (PAM PL2), station 1 (ST PL1) and station 2 (ST PL2), station 1 (BW PL1) and staion 2 (BW PL2), station 1 (PL SD 1) and station 2 (PL SD 2), and station 1 (TG PL1) and station 2 (TG PL2).

Divisi Genus Relative Density (%)

SUM PL 1 SUM PL 2 PAM PL 1 PAM PL 2 TGPL1 TGPL2 SDPL1 SDPL2 STPL1 STPL2 BWPL1 BWPL2

Bacillariophyta Achnanthes 0.40

Asterionella 5.607477 3.98 3.80 4.20 0.20 4.10 0.20 Amphiprora 1.00 2.60 0.80 0.80 1.00 2.60 Amphora 1.00 11.30 0.80 1.30 0.80 1.30 1.00 0.40 Bacteriastrum 2.10 6.04 4.67 4.19 0.50 0.50 Biddulphia 0.420757 1.305057 0.044504 0.50 5.40 1.00 5.40 1.50 0.50 Cerataulina 3.60 Climacodium 0.20 0.20 Climacosphenia 0.40 0.30 0.30 0.40

Chaetoceros 13.32398 18.92333 46.90699 54.65 38.20 0.40 25.00 33.60 24.90 33.20 38.20 11.20 Coscinodiscus 1.683029 1.957586 0.178015 0.25 1.40 3.80 2.90 1.00 2.90 1.00 1.50 0.70 Cyclotella 1.262272 0.815661 0.089008 0.04 1.90 4.60 2.30 4.60 2.30 1.90 Cymbella 2.90 44.50 2.50 1.30 2.50 1.30 2.90 3.70 Dictyiosolen 0.04 Diploneis 0.80 4.00 Ditylum 0.49 0.267023 0.13 Gyrosigma 0.50 0.50

Licmophora 1.30 0.50 1.20 23.30 Hemialus 1.542777 3.425775 0.089008 Hyalodiscus 0.420757 0.326264 Leptocylindrus 0.65 0.21 Lithodesmium 1.00 0.40 Melosira 1.683029 0.326264 Navicula 0.280505 1.305057 0.178015 0.04 3.90 0.40 11.70 9.50 11.60 4.30 3.90 1.50 Nitzschia 1.402525 1.141925 5.429462 4.82 20.30 9.80 25.00 23.60 24.90 3.10 20.40 7.10

Pleurosigma 0.140252 0.326264 0.04 0.50 1.70 1.00 1.70 3.60 0.50 Pinnularia 0.140252 0.163132 1.00 3.80 3.20 3.70 0.30 1.00 1.90 Rhabdonema 1.30 0.30 1.20 0.20 Rhizosolenia 0.014025 2.610114 0.044504 2.50 3.70 2.50 0.20 Striatella 0.20 1.00 Surirella 2.90 1.00 Skeletonema 20.70 0.20 Synedra 0.280505 1.00 Thalassionema 2.805049 17.45514 8.500223 2.51

Triceratium Thalassiothrix 5.38 2.35

ZAKIYAH et al.-Biodiversity and distribution of microalgae

1157

Chlorophyta Cosmarium 0.420757

Gloeocystis 0.50

Hydrodictyon 2.20 2.20 9.40

Volvox

Cyanophyta Oscillatoria 42.777 Spirulina 0.82

Dinoflagellata Ceratium 21.31837 29.69005 2.00267 1.30 1.90 0.40 0.40 1.00 0.40 1.00 1.90 3.70 Ceratocorys 0.50 0.50 Cladopysis 1.00 0.70

Dinophysis 0.280505

0.534045 14.00 6.00 0.20 1.20 14.10 44.20 Diplopsalis 1.542777 1.957586 0.13 1.50 0.80 0.40 Goniodoma 0.044504 0.29 0.20 2.10 Orinthocercus 1.00 1.90 1.00 0.40 Peridinium 0.981767 3.262643 1.424121 0.67 4.30 1.70 4.30 1.70 1.00 4.40 Prorocentrum 2.524544 0.326264 0.044504 9.70

Granuloreticulosa Globigerina 7.20 1.20 0.20 6.00

Ochrophyta Amphiacon 0.50 Triposolenia Dictyoacha 0.56101 0.978793 0.40 0.40 0.40 0.80 0.40 Rhizosphaera 0.701262

BIODIVERSITAS ISSN: 1412-033X Volume 21, Number 3, March 2020 E-ISSN: 2085-4722 Pages: 1149-1159 DOI: 10.13057/biodiv/d210340

Figure 11. Diversity indices of microalgae found in sampling

locations stations: (SUM PL1), (SU PL2), (PAM PL1) and (PAM PL2) representing Madura coast; (ST PL1), (ST PL2), (BW PL1) and (BW PL2) representing Java north coast; (SD PL 1), (SD PL 2), (TG PL1) and (TG PL2) representing Java south coast

Figure 12. Dominance indices of microalgae found in all sampling locations: (SUM PL1), (SU PL2), (PAM PL1) and (PAM PL2) representing Madura coast; (ST PL1), (ST PL2), (BW PL1) and (BW PL2) representing Java north coast; (SD PL 1), (SD PL 2), (TG PL1) and (TG PL2) representing Java south coast

Figure 13. Morisita Index of six different sampling location around east java and Madura coastal areas. SD: Sendang Biru Beach, South of Malang Coastal Areas;TG: Prigi Beach at Trenggalek Coastal Area; ST: Blekok beach Situbondo Coastal Area; BW: Bangsring Beach, Banyuwangi Coastal Area; SUM: Pasongsongan Beach, in Sumenep Coastal Area; PAM: Branta.Beach at Pamekasan Coastal Area

Contrary to the relatively high anthropogenic

development in all study sites, water quality parameters in

all locations generally have good similar pH values. Nitrate

and phosphate values in Sumenep and Malang coastal area

is relatively higher than other locations, which are related

to the high microalgae abundance in those areas.

Biodiversity of microalgae found in East Java coastal areas

that is represented by genus composition in six different

cities, i.e. Sumenep (Pasongsongan Beach), Pamekasan (

Branta Beach), Situbondo (Blekok Beach), Banyuwangi

(Bangsring Beach), South of Malang (Sendang Biru

Beach), and Trenggalek (Simbaronce Beach) has similarity

around 70% and only 30% differences among locations,

indicating high similarity of microalgae population in East

Java coastal area. Identifications result showed that among

35 genera that were found, most of the Genus were belong

to Bacyllariophyta division. There was no domination

found in each location observed, indicating high microalgae diversity is present in the aquatic environments,

which are still in optimum condition as confirmed by

results of water quality parameter analysis.

ACKNOWLEDGEMENTS

This research funds came from the RKI-IPB Program

under the Kemenristek-DIKTI 2019 of Indonesia. The

authors wish to express gratitude to all parties who had

given permits and assisted in the field and laboratory

works.

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