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Data Felsgate Creek at York River 8 Sep
2004
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| Tides |
High Tide |
5:41
PM |
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Low Tide |
10:56 AM |
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| Temperature |
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| Air |
29 C |
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| Water |
27 C |
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| Sediment |
26 C |
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| Weather |
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| overcast |
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| light breeze |
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| humid |
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| Salinity |
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| 5 ppt |
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| Light penetration |
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| 30 cm |
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| Biomass |
Size quadrat |
# of stems |
av. Height cm |
g wet mass/stem |
g carbon m-2 |
| Spa alt
at low tide line |
1/2m2 |
54 |
54.09 |
11.7 |
151.632 |
| Typha
angustifolia L. |
1/2m2 |
37 |
164.9 |
28.6 |
253.968 |
| Iva frutescens |
1m2 |
1 |
95 |
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g carbon m-2
= stem count*mass/g stem*0.06 g C/ g wet mass |
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| Floristics |
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| Sublittoral Zone |
no vegetation observed |
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| Littoral Zone |
Spartina
alterniflora |
saltmarsh cord grass |
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Aster
tenufolius |
saltmarsh aster |
| Supralittoral Zone |
Spartina
patens |
saltmarsh hay |
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Distichlis
spicata |
salt grass |
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Typha
angustifolia |
narrow leaf cattail |
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Scirpus
olneyi |
bulrush |
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Spartina
cynosuroides |
big saltmarsh cord grass |
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Cyperus
esculentus |
chufa |
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Cyperus
erythrorhizes |
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Pluchea
purpurascens |
saltmarsh fleabane |
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Hibiscus
moscheutos |
rose mallow |
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Andropogon
ellioti |
broom sedge |
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Clethra
alnifolia |
sweet peppercorn bush |
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Myrica
cerifera |
wax myrtle |
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Baccharas
halimifolia |
silverling |
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Iva
frutescens |
marsh elder |
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| Littornia
Snails |
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| 4
x 4 grid. Stakes at
center most tree; the tallest tree with the lightest brown leaves. |
| Splash
zone with in 4 meters of the littoral zone |
| Height
cm |
freq capture |
freq recapture |
| 0 |
0 |
35 |
| 5 |
0 |
12 |
| 10 |
0 |
8 |
| 15 |
6 |
11 |
| 20 |
6 |
20 |
| 25 |
6 |
19 |
| 30 |
20 |
6 |
| 35 |
48 |
12 |
| 40 |
20 |
12 |
| 45 |
6 |
3 |
| 50 |
11 |
1 |
| 55 |
11 |
0 |
| 60 |
5 |
0 |
| Estimation of the population of Littorina
irrorata utilizing the |
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| Lincoln/Peterson
Capture/Recapture Method |
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| N = M(n+1)/R+1 |
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population = |
139(140)/32 = |
608 |
| Where N is population size |
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Littorina irrorata |
| M is original sample size |
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| n
is the second sample size |
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| R is the recaptured snails |
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| UCA |
males:females |
Adults:Immature |
| Uca pugilator |
6 to 5 |
9 to 2 |
| Uca rapax |
5 to 5 |
6 to 4 |
| Uca
longisignalis |
4 to 2 |
0 to 6 |
| Uca minax |
2 to 1 |
2 to 1 |
| Sesarma |
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| Sesarma
reticulatum |
0 to 2 |
2 to 0 |
| Pachygrapsus |
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| Pachygrapsus
transversus |
1 to 0 |
1 to 0 |
| Stone Crab |
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| Menippe
mercenaria |
1 to 0 |
0 to 1 |
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| Fauna |
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| Phalarocorax
auritus |
Double-crested
Cormorant |
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| Larus
argentatus |
Herring Gull |
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| Paleomonetes
SP. |
grass shrimp |
abundant |
in seine |
| Micropogonias
Undulatus |
Atlantic croaker |
3 |
in seine |
| Menidia
beryllina |
bay silverside |
2 |
in seine |
| Anchoa
mitcheli |
bay anchovy |
1 |
in seine |
| Geukensia
demissa |
ribbed mussel |
numerous in mud flat |
| Bufo
terrestris |
Southern toad |
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| Uca pugilator |
fiddler crab |
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| Uca rapax |
fiddler crab |
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| Uca
longisignalis |
fiddler crab |
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| Uca minax |
red jointed fiddler crab |
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| Sesarma
reticulatum |
purple marsh crab |
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| Pachygrapsus
transversus |
mud crab |
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| Menippe
mercenaria |
stone crab |
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Data
7 Sep 04
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Pix
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Data
Directory
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