MARINe: A Long-Term Monitoring Program for Detecting Change in Rocky Intertidal

Environments

Steve Murray CSU FullertonRichard F. Ambrose UCLA

Jack Engle UCSBPete Raimondi UCSC

Mary Elaine Dunaway U.S. Minerals Management Service

MARINe (33 Unique Partners)

MARINe Sites

Core Monitoring

Sites (n = 80)

MARINe Core Monitoring Sites

MARINe South (San Luis Obispo – San Diego Counties)

57 sites: 34 mainland + 23 island 3 sites target abalone only

Longest monitoring period = 23 yrs (since 1982)MARINe North (Del Norte – Monterey Counties)

23 sites 8 sites target abalone only

Longest monitoring period = 6 yrs

MARINe Core Monitoring Sites

Sampling FrequencySemi-Annual (Spring/Fall) * south of San Francisco

Annual (Summer) * north of San Francisco

Point Conception

34 mainland sites

23 island sites

Core Monitoring Program: South

Species Monitored• Target species (13):

Anemones--Anthopleura elegantissima/solaBarnacles--Pollicipes polymerus                  Tetraclita rubescens                  Chthamalus dalli/fissus/Balanus glandula Black abalone--Haliotis cracherodii Owl limpets--Lottia gigantea California mussels--Mytilus californianus Seastars--Pisaster ochraceusBoa Kelp--Egregia menziesiiRockweed--Hesperophycus californicus                  Silvetia compressaTurfweed--Endocladia muricata Surfgrass--Phyllospadix scouleri/torreyi

• Core species: found in plots and transects in association with Target species

• Optional species

Sampling MethodsSampled Spring and Fall each year

Fixed PhotoplotsMussels, barnacles, rockweed, anemones, turf algae

Sampling MethodsSampled Spring and Fall each year

• Fixed Circular Plots– Owl limpets

• Band Transects & Irregular plots– Seastars, abalone

• Line Transects– Surfgrass

The Value of Regional Monitoring Programs

MARINe is a Regional Monitoring Program

Silvetia % Cover

1990 1995 2000 2005

DATE

0

20

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120

CO

VE

R

Pt. Conception & North

STA

SHB

PSN

OCC

HAZ

GPT

CAY

BOA

ALEG

Lottia gigantea (Owl Limpet)

• Large and easy to catch and long history of collection by humans

• Humans select larger Owl Limpets

• Recent studies (Kido & Murray 2003; Roy et. al 2003; Lindberg et. al 1998; Pombo & Escofet 1996) show reduced sizes at local sites where humans are numerous

Access Category

1 – Open Access

2 - Protected

3 - Islands

33 MARINe SitesLegend

Mexico

Los Angeles

San Diego

San Luis Obispo

1

0

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150C

ou

nt

0.00

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0.12

0.14

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rtion

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r Ba

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r

0 20 40 60 80 100 120SIZE

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0.00

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3

n = 949

n = 847

n = 1227

Shell Length (mm)

Smaller mean, median, and

maximum Limpet sizes in open access

sitesHypotheses

Ho: Humans are taking the large limpets wherever they can

Ha1: Oystercatchers

Ha2: Visitor (Trampling) impact

Ha3: Natural Geographic clines in size

MARINe Database

• Microsoft Access database by SCCWRP in 2003-2004• Relational database for core monitoring data

• Currently contains ~ 1 million records• Photo database planned

MARINe Field Logs

Biodiversity Surveys

Alegria, S.B. Co.

Distributions and Abundances Site Comparisons Community data

SCCC CIOR NCWA

alegria

andrew molera

ano nuevo

arroyo hondo

bird rock

boat house

bob creek

bodega

bolinas pt

burnt hill

cabrillo zone 1

cabrillo zone 3

cambria

cannonball island

cape arago

cape mendocino

carpinteria

cayucos

chilean memorial

coal oil pt

crystal cove

cuyler_2

dana point

ecola

fitzgerald

fogarty creekgovernment pt

hazards

hopkins_2

landing cove

johnsons_2

little harbor catalina

mill creek

mussel shoals

nw talcott sri

old stairs

paradise cove

pigeon pt

pt fermin

santa maria creek

scott_2

scripps

terrace_2

crook pt smicuyler harbor smi

east pt sri

ford pt sri

forney scifossil reef sri

fraser pt sci

frenchys cove ai

johnsons lee sri

middle ai

prisoners sci

pt lobos

pt sierra nevada

sea lion rookery sbisea ranch

shaws cove

shell beachshelter cove

stairs

starfish pt

stillwater

taylor pt

trailer sci

valley sci

whites pt

willows sci

hopkins

sandhill

scott

terrace

Stress: 0.19

This nMDS was constructed using only those species that had a total of at least 25 points across all sites (118 total spp). Data were sq. rt. transformed.

Melissa Wilson, Pete Raimondi

Community Surveys

Mark M. Littler’s Studies

MDS OrdinationsMainland Sites

1999-2000 Samples differ from seasonal and annual variation

exhibited by 1970s Samples

Corona del Mar

Whites Point

Stress 0.09

Stress 0.09

Steve Murray

State of the Shoreline Report A key goal is making data directly available to

managers and decisionmakers

A Key Goal of MARINe is Increasing Public Awareness of Tidepools and How They Can Help Protect these Resources

MARINe Partnerswww.MARINe.gov