Habitat Communities of the San Franciso Bay area

Habitat Communities of the San Franciso Bay area

Stanton, R.J. and J.R. Dodd. 1976. The application of trophic structure of fossil communities in paleoenvironmental reconstruction.

Lethaia, 9:327-342.

PaleoecologyG632

Offshore Entrance OuterBay MidBay InnerBay OysBank Brackish SumMya 1 1 1 1 1 1 1 7Macoma 1 1 1 1 1 1 1 7Mytilus 1 1 1 1 1 1 0 6Clinocar 0 1 1 1 1 1 0 5Cryptomy 0 1 1 1 1 1 1 6Nossar 1 1 1 1 1 1 0 6Turbonil 1 0 1 1 1 1 0 5Mitrella 1 0 1 1 1 0 0 4Tellina 1 1 1 1 0 0 0 4Zirfaea 0 1 1 1 1 0 0 4Tresus 0 1 1 1 1 0 0 4Thais 0 1 1 1 0 1 0 4Ostrea 1 1 1 1 1 1 0 6Crassost 0 1 0 0 0 1 0 2Urosalp 0 0 1 0 0 1 0 2Crepidul 0 0 1 1 1 1 0 4Prototha 0 1 1 1 0 1 0 4Barnea 0 0 1 1 1 1 1 5Odostomi 1 0 0 1 1 1 0 4Lasaea 0 0 0 0 1 0 0 1Gemma 0 0 0 1 1 0 0 2Epitomiu 1 0 1 1 0 0 0 3Littorina 0 0 1 0 0 0 0 1Lacuna 0 1 1 1 0 0 0 3Chlamys 0 0 1 1 0 0 0 2Lucina 1 0 0 1 0 0 0 2Modiolus 1 1 0 1 0 0 0 3Nuculana 1 0 0 1 0 0 0 2Psephide 1 0 1 1 0 0 0 3Solen 1 0 0 1 0 0 0 2Siliqua 0 1 1 1 0 0 0 3Saxidomu 0 1 1 1 0 0 0 3

Pholadid 0 1 1 1 0 0 0 3Mopalia 0 1 1 0 0 0 0 2Diodora 0 1 1 0 0 0 0 2Margarit 0 0 1 0 0 0 0 1Olivella 1 1 1 0 0 0 0 3Lunatia 1 1 1 0 0 0 0 3Hiatella 0 0 1 0 0 0 0 1Pododesm 0 1 1 0 0 0 0 2Spisula 0 1 1 0 0 0 0 2Hinnites 0 1 1 0 0 0 0 2Acmaea 0 0 0 0 0 1 0 1Ilyanass 0 0 0 0 0 1 0 1Anomia 0 0 0 0 0 1 0 1Pretricol 0 1 1 0 0 0 0 2Adula 0 1 0 0 0 0 0 1Aceteocin 1 0 0 0 0 0 0 1Antiplan 1 0 0 0 0 0 0 1Cancella 1 0 0 0 0 0 0 1Neptunea 1 0 0 0 0 0 0 1Eulima 1 0 0 0 0 0 0 1Mangelia 1 0 0 0 0 0 0 1Megasurc 1 0 0 0 0 0 0 1Volvulel 1 0 0 0 0 0 0 1Acteon 1 0 0 0 0 0 0 1Ophioder 1 0 0 0 0 0 0 1Propebel 1 0 0 0 0 0 0 1Acila 1 0 0 0 0 0 0 1Cuspida 1 0 0 0 0 0 0 1Lucinoma 1 0 0 0 0 0 0 1Lyonsia 1 0 0 0 0 0 0 1Nemocard 1 0 0 0 0 0 0 1Nucula 1 0 0 0 0 0 0 1Pandora 1 0 0 0 0 0 0 1Thyasiro 1 0 0 0 0 0 0 1Yoldia 1 0 0 0 0 0 0 1Compsomy 1 0 0 0 0 0 0 1Cadulus 1 0 0 0 0 0 0 1Dentaliu 1 0 0 0 0 0 0 1Kellia 0 0 1 0 0 0 0 1

Diversity 40 27 36 29 16 18 4

Presence-Absence Matrix Based on Previous Chart

PAST Software

Seriation, unconstrained

San Francisco Bay Habitat Communities

0

10

20

30

40

50

60

70

Offsho

reEntr

ance

OuterB

ayMidB

ayInn

erBay

OysBan

kBrac

kish

Diversity% Specialists

R2 = 0.7043

-10

0

10

20

30

40

50

60

70

0 10 20 30 40 50

Divers ity

% S

peci

alis

ts

Diversity vs. Sample Size

R2 = 0.0601

05

1015202530354045

0 10 20 30 40 50

Divers ity

Sam

ple

Size

Specialists are taxa that occur in only one or two habitats.

NT-SYS software

Jaccard coefficient

01

23

45

67

80

0.12

0.24

0.36

0.48

0.6

0.72

0.84

0.96

Similarity

Brackish

Entrance

OuterBay

MidBay

InnerBay

OysterBank

Offshore

PAST software

Jaccard Coeff.

NT-SYS software

Jaccard Coefficient

Offshore Specialists

Generalists

Bay Fauna

Oyster Bank

0 8 16 24 32 40 48 56 640

0.12

0.24

0.36

0.48

0.6

0.72

0.84

0.96

Sim

ilarit

y

Meg

asur

cC

adul

usAc

teon

Acila

Acet

eoci

nAn

tipla

nC

ance

llaC

omps

omy

Cus

pida

Den

taliu

mEu

lima

Luci

nom

aLy

onsi

aM

ange

liaN

emoc

ard

Nep

tune

aN

ucul

aO

phio

der

Pand

ora

Prop

ebel

Thya

siro

Volv

ulel

Yold

iaLa

saea

Gem

ma

Barn

eaC

repi

dul

Clin

ocar

Myt

ilus

Nos

sar

Ost

rea

Cry

ptom

yM

acom

aM

yaM

itrel

laTu

rbon

ilO

dost

omi

Dio

dora

Hin

nite

sM

opal

iaPo

dode

smPr

etric

olSp

isul

aLu

natia

Oliv

ella

Lacu

naPh

olad

idSa

xido

mu

Siliq

uaPr

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haTh

ais

Tres

usZi

rfae

aC

hlam

ysEp

itom

iuPs

ephi

deLu

cina

Nuc

ulan

aSo

len

Mod

iolu

sTe

llina

Hia

tella

Kellia

Litto

rina

Mar

garit

Uro

salp

Acm

aea

Anom

iaIly

anas

sAd

ula

Cra

ssos

t

PAST software

Offshore specialists

Generalists

Bay fauna

Oyster bank

Offshore specialistsGeneralists

Bay fauna

NT-SYS software

Jaccard Coefficient

Increasing Salinity

Increasing Grain Size

NT-SYS software

Jaccard Coefficient

Offsho re

Entrance

OuterB ay

M idB ay

InnerB ay

OysterB ank

B rackish

-0.48 -0.32 -0.16 0 0.16 0.32 0.48 0.64

Co o rdinate 1

-0.24

-0.16

-0.08

0

0.08

0.16

0.24

Coo

rdin

ate

2

0 4 8 12 16 20 24 28

Target rank

0

4

8

12

16

20

24

28

Obt

aine

d ra

nk

MDSStress = 0.0

Increasing salinity and water depth

PAST software

Jaccard Coefficient

Offsho re

EntranceOuterB ay

M idB ay

InnerB ay

OysterB ank

B rackish

-0.05 -0.04 -0.03 -0.02 -0.01 0 0.01 0.02

A xis 1

-0.03

-0.024

-0.018

-0.012

-0.006

0

0.006

0.012

0.018

Axi

s 2

Correspondence AnalysisPAST software