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
otot
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