Lisa FongUP206A Winter 2011

UCLAFebruary 7, 2011

Marine.gov

Multi-Agency Rocky Intertidal Network (MARINe) Sampling

Spring and Fall, 1981-present

5 replicate photoplots per site

Each plot scored into 100 squares to estimate percent cover

Skill: Inset mapSources: MARINe Database, ESRI

Marine.gov

Ulva spp. (Sea Lettuce)

pt-lobos.comwww.elkhornslough.org www.ubcbotanicalgarden.org

Cosmopolitan ephemeral algaeEarly successional species; indicator of recent disturbanceLifespan 0-3 monthsAlgae species and populations have optimal growing

temperatures (e.g. de Casabianca et al. 2002)Has been seen in abundance in a Southern Californian

eutrophic environment (Murray and Littler 1978)

Questions AddressedCan a temporal difference in Ulva distribution be

seen in survey data?What is the spatial relationship between the

presence of Ulva and certain types of land use in Southern California?

Potential Policy ApplicationsWater discharge regulationLand use permitting for

agriculture or development

Photo by Carlos Robles

Spring Ulva Presence: 1998 and 2003

Is there a markeddifference in Ulvadistribution between1998 and 2003?

El Niño 1997-1998 La Niña 1998-2000

Ulva Density Index Value (UDIV) = [∑(%cover)/n]/5

Skills: graph, graduated symbolsSource: MARINe Database, ESRI

Impervious Land Cover and Spring 2003 Ulva Density

Produced by Lisa Fong

Impervious Land Cover

Hydromodification due to urbanization leads to loss of ecological water quality improvement and rapid flow of untreated urban runoff to the ocean during large rain events. Skills: graduated symbols

Sources: MARINe Database, ESRI, National Atlas, USGS

Southern California Vineyard and Winery Locations and Spring 2003 Ulva Density

The U.S. Environmental Protection agency (2005) found agriculture to be the leading source of impairment to surveyed rivers and lakes

Runoff flowing over agricultural land picks up sediment, nutrients (P, N, K), pathogens, salts, pesticides, metals

Skills: graduated symbols, geoprocessing (merged county hydrology shapefiles), geocoding (vineyard addresses), attribute subselection (2003aboveZ[ero] was derived by Querying 2003Spring for ULV_ADJ_SP03 > 0 and exporting data to a new layer)Sources: Simply Maps, ESRI, National Atlas, MARINe Database

Southern California Vineyard and Winery Locations and Spring 2003 Ulva Density: Central Coast Watersheds

Skills: inset map, graduated symbols, geoprocessing, geocoding, attribute subselectionSources: Simply Maps, ESRI, National Atlas, MARINe Database

Future PlansExplore pattern of distribution over a

continuous period of years (1996-2006) Compare Ulva presence data to yearly rainfall

amountsInvestigate spatial relationships between Ulva

presence and sewage outfalls, public access locations, population densities, grazing land

Photo by Colin Bates