eastern shore
DESCRIPTION
Eastern Shore. By: Kelly Threatt. Wachapreague, VA. General Description. Location: Wachapreague, Virginia (Eastern Shore) Date: September 14, 2007 2 land sites (Barrier Islands): Paramore Island and Cedar Island 4 water sites: Inlet, Clubhouse Point, Hummocks Channel, and Nikawampus Creek. - PowerPoint PPT PresentationTRANSCRIPT
Eastern Shore
By: Kelly Threatt
Wachapreague, VA
General Description
Location: Wachapreague, Virginia (Eastern Shore)
Date: September 14, 2007
2 land sites (Barrier Islands): Paramore Island and Cedar Island
4 water sites: Inlet, Clubhouse Point, Hummocks Channel, and Nikawampus Creek
Goals
• Collecting
• Water depth• Dissolved
oxygen• Temperature• Salinity• pH• Nutrient
*Introduce topics that will be covered in more detail later in the semester *
• Collecting/ Analyzing
• Sea floor sediment grain size
• Sea floor sediment composition
• Describing/ Collecting
• Planktonic life
• Nektonic life
• Benthic life
ToolsTrawl-used to collect nektonic life
Secchi Disk-used to find the depth of the photic zone
Dredge-used to collect benthic life
More Tools
Plankton Net-used to collect plankton from the surface water
Ponar Grab-used to collect sediment off of the sea floor
Niskin Bottle-used to collect water samples below the surface water
YSI-used to measure dissolved oxygen, salinity, depth, and temperature
Field Results
Inlet
Clubhouse Point
Hummocks Channel
Nikawampus Creek
Inlet
• Between two barrier island: Cedar Island and Paramore Island
• GPS Location: N 37º 34.848” W 75º 37.81”
• Total Water Depth: 80ft
• Photic zone depth: 1m 3.5cm
Inlet DataDepth Temperature Salinity DO pH
0.0m (surface) 25.2ºC 31.1 ppt 5.8 mg/l 8.5
2m 25.2ºC 31.6 ppt 5.71 mg/l 8.2
Site 1-Inlet
25.2
31.1
5.8
8.5
25.2
31.6
5.718.2
0
5
10
15
20
25
30
35
1 2 3 4
1-Temperature (˚C)
2-Salinity (ppt)
3-Dissolved Oxygen (mg/L)
4-pH
Blue-0.0m
Red-2m
Life in the Inlet
Plankton (drifters) Neckton (swimmers) Benthos (bottom-dwellers)
Seaweed SnailsDead FishJelly Fish (no tentacles)
Conch Shell (Boosicomb)ClamsOyster shellsGobee (naked)Hermit Crab (Flat Clawed)KnobwelkGardiella (red)Olva (green)
Clubhouse Point
• GPS Location: N 37º 35.35” W 75º 37.80”• Total Water Depth: 12ft• Photic zone depth: 1m
Sea Floor Sediments• Color: gray, black, brown • Texture: shelly bottom• Compaction: hard shells
Clubhouse Point DataDepth Temperature Salinity DO pH
0.0m (surface) 25.8ºC 32.6 ppt 6.69 mg/l 8.4
2m 25.2ºC 32.5 ppt 5.75 mg/l 8.3
3m 25.9ºC 32.5 ppt 5.77 mg/l
Site 2-Clubhouse Point
25.8
32.6
6.698.48.3
25.9
32.5
5.77
32.5
5.75
25.2
0
5
10
15
20
25
30
35
1 2 3 4
Blue-0.0m
Red-2m
Yellow-3m
1-Temperature (˚C)2-Salinity (ppt)3-Dissolved Oxygen (mg/L)4-pH
Life at Clubhouse Point
Neckton (swimmers) Benthos (bottom-dwellers)
Sea porkComb jellySeaweedBay anchovies
Conidium (dead man’s fingers)CrabOlva GrassilariaSea urchinsMollusks
Hummocks Channel
• GPS Location: N 37º 36.472” W 75º 38.671”• Total Water Depth:15ft• Photic zone depth: 1.5m
Sea Floor Sediments• Color: green, gray, black• Texture: more mud than shells • Compaction: muddy, soupy
Hummocks Channel DataDepth Temperature Salinity DO pH
0.0m (surface) 25.6ºC 32.9 ppt 92.0 mg/l 8.2
2m 25.5ºC 32.9 ppt 92.2 mg/l 7.9
3m 25.6ºC 32.9 ppt 91.8 mg/l
Site 3-Hummocks Channel
25.6
32.9
92
8.2 7.9
25.6
32.9
91.892.2
32.9
25.5
0
10
20
30
40
50
60
70
80
90
100
1 2 3 4
Blue-0.0m
Red-2m
Yellow-3m
1-Temperature (˚C)2-Salinity (ppt)3-Dissolved Oxygen (mg/L)4-pH
Life in Hummocks Channel
Neckton (swimmers) Benthos (bottom-dwellers)
FishComb JellySea Lettuce
Sea PorkBaby Crab
Nikawampus Creek
• Mud flat• GPS Location: N 37º 37.648” W 75º 40.813”• Total Water Depth: 5.2ft• Photic zone depth: 25cm
Sea Floor Sediments• Color: black• Texture: mud• Compaction: soft and soupy
Nikawampus Creek DataDepth Temperature Salinity DO pH
0.0m (surface) 25.7ºC 33.4 ppt 4.75 mg/l 8.0
.5m 25.6ºC 33.3 ppt 4.56 mg/l 7.9
Site 4-Nikawampus Creek
25.7
33.4
4.75
8
25.6
33.3
4.56
7.9
0
5
10
15
20
25
30
35
40
1 2 3 4
Blue-0.0m
Red-.5m
1-Temperature (˚C)2-Salinity (ppt)3-Dissolved Oxygen (mg/L)4-pH
Life in Nikawampus Creek
Neckton (swimmers) Benthos (bottom-dwellers)
White perchBlue crabSpotBrief squidBlack sea bassShrimpPompano
Clams
Comparing Surface Water Data
Temperature
Salinity
Dissolved Oxygen
pH
Temperature
Temperature Differences
24.9
25
25.1
25.2
25.3
25.4
25.5
25.6
25.7
25.8
25.9
1 2 3 4
Site Number
Deg
ree
s C
els
ius
Site:
1-Inlet
2-Clubhouse Point
3-Hummocks Channel
4-Nikawampus Creek
Salinity
Salinity Differences
29.5
30
30.5
31
31.5
32
32.5
33
33.5
34
1 2 3 4
Site
Measu
re o
f S
ali
nit
y (p
pt)
Site:
1-Inlet
2-Clubhouse Point
3-Hummocks Channel
4-Nikawampus Creek
Dissolved Oxygen
Dissolved Oxygen Differences
5.8 6.69
92
4.75
0
10
20
30
40
50
60
70
80
90
100
1 2 3 4
Site
Dis
solv
ed
Oxy
gen
(m
g/L
)
Site:
1-Inlet
2-Clubhouse Point
3-Hummocks Channel
4-Nikawampus Creek
pH
pH Differences
7.7
7.8
7.9
8
8.1
8.2
8.3
8.4
8.5
8.6
1 2 3 4
Site
pH
Site:
1-Inlet
2-Clubhouse Point
3-Hummocks Channel
4-Nikawampus Creek
Paramore Island
• Observations• Tree were burned• Dry
Lake on Island-Dried up (cracks in lake bed)-A week prior it had more water-Salinity was 44 or 45 and the DO
was .1 which is to low for the fish to live. The fish were at the different levels around the pond indicting that the water level had dropped recently.
• It’s eroding on the ocean side and depositing on the bay side
• the Italian Ridge (one ancient dune)
• Shaped like a drum stick
• Different from Cedar Island• Maritime Forest-more
vegatation• More life-insects, animals
(raccoon and deer dropping seen)
• Muddy ground and sand• Marsh side and shore side• Only one dune• Paramore had a very short
shoreline that was not very flat
Cedar Island
• Observations• Fish and crabs in
surrounding waters • Atlantic side had more
waves than bay side • Bay side was calmer and
had a really strong current• Was thought to have been
marsh land because of all of the oyster shells that were ancient
• A lot dead horseshoe crabs from babies to full grown on the ocean side
• Different from Paramore Island• Less vegetation• More shells, “a graveyard of
shell” • Smaller• More dunes• Wide and round.• Birds such as seagulls and
pelicans• At the ocean the shoreline
was a flat beach.• Dune grass and sea grass
with prickly barbs found more in the center of the island
Deep Sea Location
Atlantic Ocean-Gulf Stream
Salinity
-Around 36.5 ppt
-Higher than the highest site (Nikawampus Creek with 33.4 ppt)
Temperature
-Between 22-24°C
-Our sites were between 25.2°C and 25.8°C
pH
-Around 8.10
-Our sites were between 8 and 8.5
THANKS FOR A GREAT
SEMESTER!!!!
HAVE A GOOD HOLIDAY!!!!