Post on 12-Jul-2020
HAB Bulletin [status of harmful and toxic algae]
Week runs from Sunday to Saturday
Ireland: Predictions
ASP event: Moderate watch precaution on all shores.
AZP event: Low ,precautionary.
DSP event: Highest SW, W, NW. High all areas.
PSP event: Highest SW site specific. Low to moderate elsewhere .
ASP: Moderate caution until trend establishes. Patches , below regulatory limits , occurring around entire coastline, related to environmental transitory conditions.
AZP: Continued negligible levels of toxins present in samples tested ,with no clear presence trend. This species has caused sudden acute issues in the past and rarely presents any reliable trends.
DSP: Highest caution. Continue cell presence but beginning to clear slowly. Highest SW and W, now experiencing closures as indicated, and increasing to high throughout all coastline. Increase in preparedness and continuance of good sampling recommended through out this seasonal transitional period.
PSP: No Change- 2 week trend. Highest SW region, see specific sites. Current weather may lead to breakup or spread –adjacent sites’ caution advised. Low elsewhere. Alexandrium cells can occur in both toxic and nontoxic forms, and while currently most toxin levels remain negligible, this could change rapidly.
Blooms: High : ( Caution increasing – please see additional information section for news).Both beneficial and detrimental blooms may occur in areas of good growth and suitable environmental conditions. Transient wind driven blooms of some species may temporarily accumulate on shores. Any unusual water discoloration should always be noted and regional labs contacted if concerned /regarding possible need for additional sampling. All feedback is welcome at Joe.Silke@Marine.ie
NMP Current closures
ASP AZP DSP PSP
0 0 5 0
Week 28: July 5th – 11th 2020
Based on current site testing
HAB Bulletin [status of harmful and toxic algae]
National Monitoring ProgrammeHISTORIC TRENDS
ASP events: mid-March to early May
AZP events: April to December
DSP events: May to December
PSP events: June to mid-July and end September. Predominantly in Cork Harbour.
AZP
DSP
PTX
ASP
PSP
Levels from week 1 to present week. Regulatory limit - - - - - - -
DSP and Dinophysis sp. current trends
Ireland HAB & Biotoxin Distribution maps
[current status of harmful and toxic algae]
Phytoplankton species – last 3 wks.
All levels of DSP biotoxin recorded - last 3 wks.
Current closures levels≥ DSP 0.16 µg/g
CommentsWk. 28 – -Highest caution-Continued high Dinophysis celllevels and potential increasingspread causing seasonalclosures –particularly in SW butalso West. Areas adjacent toclosed areas should exercisehigh caution also. This is thehistorical season andenvironmental conditions aresuitable . Highest caution andgood sampling advised untilcells decrease completely.
Ireland HAB & Biotoxin Distribution maps
[current status of harmful and toxic algae]
Phytoplankton species – last 3 wks. All levels of AZP biotoxin recorded - last 3 wks.
AZP and Azadinium like species current trends
Current closures levels≥ AZP 0.16 µg/g
CommentsWk. 28 - Negligible toxinlevels currently . No cleartrend established. Westernshorelines showing 1 weekpossible increase,particularly off Galway/Mayo areas.
ASP
Ireland HAB & Biotoxin Distribution maps
[current status of harmful and toxic algae]
ASP and Pseudo nitzschia sp. current trends
Current closures levels≥ASP 20 µg/g
CommentsWk. 28: - Precautionarymoderate watch level cautionin all affected areas due toincreases in spread andfluctuating trends. Currentlyonly low levels of toxinsobserved.
Phytoplankton species – last 3 wks.
All levels of ASP biotoxin recorded – last 3 wks.
Ireland HAB & Biotoxin Distribution maps
[current status of harmful and toxic algae]
PSP and Alexandrium sp. current trends
Phytoplankton species (last 3 wks.)
All levels of PSP biotoxin recorded (last 3 wks.)
CommentsWk. 28 –Continued highest
caution advised in SW areaswith high potential cell levels.Adjacent sites should alsoexercise additional cautionduring favourableenvironmental /transportconditions. Elsewhere lowlevels of insitu potential cellsobserved. This is now thehistorical period of occurrenceand localised issues can occurrapidly in specific sites .
Current closures levels≥ PSP 800 µg/Kg
Ireland Fish killing phytoplankton Distribution maps
[current status of harmful and toxic algae]
Karenia mikimotoi
(old name: Gyrodinium aureolum)Current general conditions: Wk. 28
Potential for problematic species to cause issues : High
Karenia mikimotoi Moderate to High, increasing.
Heterocapsa sp. Moderate to High, increasing.
Noctiluca scintillans Low
Coscinodiscus species Moderate.
Phaeocystis sp. Moderate to high.
Chaetoceros sp Moderate to High.
Continued high levels of Phytoplankton cells observed in most
areas. Summer seasonal species dominant in populations .Calm
weather, with high UV indices combined with localised onshore
winds may cause sporadic localised bloom issues. Please note ,
any species at sufficient numbers may cause temporary issues in
water quality which could impact specific areas over the course of
a tidal cycle or for a period of days while specific suitable
conditions prevail. All areas should maintain good routine
sampling if concerned. Karenia sp. cells currently continue to be
observed inshore at low levels only. This species has been known
to come inshore suddenly, at bloom levels, during suitable
environmental conditions.
Phaeocystis speciesKarenia mikimotoiHeterocapsa spp.Noctiluca scintillans
Alexandrium spp.
Any part of coastline
Has tended ,in past ,to be very site specific
Ireland Satellite data: surface chlorophyll and temperature maps
Top 5 phytoplankton cell levels in all areas last week
NW coast (M4) Below average by 1.50°C wk.27SW coast (M3) Below average by 1.16°C wk.27SE coast (M5) Below average by 1.11°C wk.27
Week 28
Chlorophyll levels indicating potential decrease thisweek in cell levels in general, but some inner bayareas showing potential temporary peaks .Cautionshould be exercised if weather/environmentalconditions allow transport onto exposed shorelines.Dinoflagellates and Prymesiophyte groups increasing. This is now the historical season for many bloomspecies to occur, both beneficial and detrimental.Extra caution advised in all areas.
Rank Region Species Rounded Count
1 East Chaetoceros (Hyalochaete) spp.
2183000
2 East Pseudo-nitzschia seriata complex
60000
3 East Rhizosolenia spp. 11000
4 East Lauderia / Detonula sp 5000
5 East Skeletonema spp. 5000
1 North-West Microflagellate spp. 12488000
2 North-West Chaetoceros (Hyalochaete) spp.
2827000
3 North-West Pennate diatom 180000
4 North-West Leptocylindrus danicus 59000
5 North-West Prorocentrum micans 40000
1 South Prorocentrum balticum/minimum
706000
2 South Lauderia / Detonula sp 25000
3 South Leptocylindrus minimus 21000
4 South Chaetoceros (Hyalochaete) spp.
20000
5 South Skeletonema spp. 17000
1 South-East Chaetoceros (Hyalochaete) spp.
618000
2 South-East Skeletonema spp. 368000
3 South-East Centric diatom 70000
4 South-East Leptocylindrus danicus 68000
5 South-East Pennate diatom 30000
1 South-West Prymnesiophytes 119000
2 South-West Microflagellate spp. 93000
3 South-West Prorocentrum micans 75000
4 South-West Leptocylindrus minimus 75000
5 South-West Skeletonema costatum 73000
1 West Chaetoceros (Hyalochaete) spp.
1718000
2 West Skeletonema spp. 213000
3 West Pseudo-nitzschia seriata complex
115000
4 West Chaetoceros socialis 86000
5 West Rhizosolenia spp. 42000
1 West North-west Microflagellate spp. 5065000
2 West North-west Euglena/Eutreptiella spp. 844000
3 West North-west Glenodinium spp. 170000
4 West North-west Pennate diatom 118000
5 West North-west Leptocylindrus minimus 78000
1 West South-West Leptocylindrus minimus 10000
2 West South-West Paralia sulcata 2000
3 West South-West Guinardia delicatula 2000
4 West South-West Prorocentrum micans 1000
Ireland modelled data: Estimated Water PathwayWeek runs from Sunday to Saturday
Week 23: 31 May – 6 June, 2015Ireland modelled data: Estimated Water Pathway
The maps show the most
likely transport pathways
for the next 3 days of
phytoplankton found along
the presented transects
(black lines off Mizen Head
and the Mouth of Bantry Bay)
and water depths (bottom,
20 metres and surface)
Bottom water Water @ 20 metres Surface water
Reddish colours represent areas
where phytoplankton remain
longest
Cooler colours represent areas
where phytoplankton remain for
shorter periods
Continued dominant Southerly directional water movements in all depths, with more active
movement compared to recent weeks.
no change- 2 week pattern - Continued strong incoming upwelling conditions of outer waters
indicated, allowing offshore waters to enter bay areas through this transportation.
SOUTHWEST: Bantry Bay Forecast for the next 3 days
Ireland modelled data: Estimated Water Pathway
Bantry Bay3 day estimated water flows at the mouth and mid-bay sections of Bantry Bay
T1
T1
T2
Forecast for next 3 days
De
pth
20 m
20 m
Water surface
Sea bed
Flow (m3 s-1)
100
80
60
40
20
0
-20
-40
-60
-80
-100
IN
OUT
Shot Head cross section:
Continued strong upwelling
expected to be main
transportation of outer waters into
inner regions.
Mouth cross section:
Strong dominant
upwelling transport
expected as outer bay
waters move into inner
bay areas.
CURRENT inflowInflow is equal to the long term mean at Shot Head
Inflow is 2% greater than the long term mean at mouth of Bay
Ireland modelled data: Estimated Water PathwayWeek runs from Sunday to Saturday
Week 23: 31 May – 6 June, 2015Ireland modelled data: Estimated Water Pathway
The maps show the most
likely transport pathways
for the next 3 days of
phytoplankton found along
the presented transects i.e.
white lines off Aughrus Point
and the Mouth of Killary
Harbour, and water depths
(bottom, 20 metres and
surface)
Reddish colours represent
areas where phytoplankton
remain longest
Cooler colours represent
areas where phytoplankton
remain for shorter periods
WEST: Killary Harbour Forecast for the next 3 days
Bottom water Water @ 20 metres Surface water
ClegganMixed water movements in all depth zones in offshore waters .This may allow current water
conditions to remain stable for a period of time.
KillaryContinued strong transportation, at all depths, indicated as far as mid bay areas , allowing off
shore waters to be transported inshore.
Ireland modelled data: Estimated Water Pathway
Killary Harbour - 3 day estimated water flows at the mouth of Killary Harbour
T1
T1
Killary Harbour
De
pth
CURRENT inflow
Inflow is 22% lower than average long term mean at mouth of
Bay
Water
surface
Forecast for next 3 days
Flow (m3 s-1)
100
80
60
40
20
0
-20
-40
-60
-80
-100
IN
OUT
Killary Harbour Mouth cross section:
Moderate mixed water movement
expected into midbay areas .
Ireland modelled data: Estimated Water Pathway
West Coast - 3 day estimated water flows along a transect off Aughrus Point
T1
110 m
Water surface
Forecast for next 3 days
northward
flow
southward
flow
T1
Killary Harbour
Cleggan transect
Aughrus Point
De
pth
Flow (m3 s-1)
100
80
60
40
20
0
-20
-40
-60
-80
-100
northward
flow
southward
flow
T1
Killary Harbour
Cleggan transect
Aughrus Point Cleggan section: Generally strong
Southerly movements dominating
most areas with mid depth
developing patches of Northerly
movements growing in some areas.
All waters indicating good mixing
activity and strong transportation.