karen kesler , vincent politano , kennedy paynter
DESCRIPTION
Differentiating the impact of the physical and biotic components of the eastern oyster, Crassostea virginica , on the benthic reef community . Karen Kesler , Vincent Politano , Kennedy Paynter. The physical and biotic contributions of Crassostrea virginica. Physical Structure: - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/1.jpg)
Karen Kesler, Vincent Politano, Kennedy Paynter
Differentiating the impact of the physical and biotic components of the eastern oyster,
Crassostea virginica, on the benthic reef community
![Page 2: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/2.jpg)
The physical and biotic contributions of Crassostrea virginica
• Physical Structure:• Hard surface for settlement• Complex arrangement of oyster shells (Luckenbach et al. 2005)
• Complexity correlated with higher biomass, abundance, and species richness (Cranfield et al 2004, Coen et al. 2007)
• Reduces turbidity (Meyer and Townsend 2000)
•Biotic Input:• Benthic-pelagic couplers• Biodeposit production
![Page 3: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/3.jpg)
Past Research
• Tolley and Volety 2005: C. virginica • No overall difference between live and shell treatments• Some species level differences
• Silver Botts et al. 1996: Dreissena spp • no differences in amphipods, turbellarians, and
hydrozoans abundances• Chironomid abundance higher on live mussels
• Stewart et al. 1998: Dreissena spp • macroinvertebrate biomass higher on live mussels
![Page 4: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/4.jpg)
Question and Hypotheses
• Is the Crassostrea virginica reef community predominantly responding to the presence of the oyster structure or is there an additional response to the biotic component of a live oyster?
• Ho: The two treatments will have equal abundance and biomass. • May indicate structure as the dominating influence
• HA: The live oyster treatment will have higher abundance and/or biomass. • May indicate an additional benefit of live oyster
![Page 5: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/5.jpg)
Methods
• In July 2009, eighty C. virginica clumps were collected from the Chester River, MD
• Clumps were cleaned of all epibiotics
• Half of the clumps were shucked and glued shut to reassemble the structure of a live oyster
• 4 clumps were zip tied to a 57.8 cm2 tray
• 10 trays of live oysters and 10 trays of oyster shell of equal complexity were deployed into the Patuxent River, MD
• Trays were placed 3 m apart in a 12 m by 15 m grid
![Page 6: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/6.jpg)
Methods • In October 2009 three trays of each treatment were
removed for a mid-experiment evaluation
• Oysters and epifauna were preserved in ethanol • Epifauna were cleaned from the oysters, identified,
enumerated, and biomassed• ANOVA with an adjusted alpha was performed
![Page 7: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/7.jpg)
Results: Least Abundant Taxa
0100200300400500600700800900
1000 LiveOyster Shell
Taxa
Abu
ndan
ce p
er tr
ay
![Page 8: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/8.jpg)
Results: Most Abundant Taxa
polychaeta amphipoda platyhelminthes copepoda0
5000
10000
15000
20000
25000
30000LiveOyster Shell
Taxa
Abu
ndan
ce p
er tr
ay
![Page 9: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/9.jpg)
Results: Taxa with Lowest Biomass
cirrip
edia
bivalv
ia
polyc
haeta
amphip
oda
actini
aria
platyh
elmin.
..misc
.
gastr
opoda
cope
poda
xanth
oidea
isopod
a
shrim
p0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8Live Oyster Shell
Taxa
Dry
bio
mas
s per
tray
(g)
![Page 10: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/10.jpg)
Results: Taxa with Highest Biomass
teleostei tunicata0
1
2
3
4
5
6LiveOyster Shell
Taxa
Dry
bio
mas
s per
tray
(g)
![Page 11: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/11.jpg)
Discussion
• No difference in reef community biomass or abundance• Structure may have been a stronger influence on
community development than the biotic component • Tidal movement and wave action may have influenced
results
![Page 12: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/12.jpg)
What’s Next ?
• Remaining 14 trays moved to deeper water in November 2009• Reduced influence of tidal and wave action
• Removed in July 2010• Currently processing trays• New data will present a more refined data set
![Page 13: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/13.jpg)
Acknowledgements
• Paynter Lab staff and students• Kyle Rambo: Naval Air Station, Patuxent River• Oyster Recovery Partnership (ORP)• National Oceanic and Atmospheric Administration –
Chesapeake Bay Office (NCBO)• Army Corps of Engineers, Baltimore District
![Page 14: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/14.jpg)
References
• Coen, LD, RD Brumbaugh, D Bushek, R Grizzel, MW Luckenbach, MH Posey, SP Powers, and SG Tolley. 2007. Ecosystem services related to oyster restoration. Marine Ecology Progress Series 341: 303-307.
• Cranfield, HJ, AA Rowden, DJ Smith, DP Gordon, and KP Michael. 2004. Macrofaunal assemblages of benthic habitat of different complexity and the proposition of a model of biogenic reef habitat regeneration in Foveaux Strait, New Zealand. Journal of Sea Research 52: 109- 125.
• Luckenbach, MW, LD Coen, PG Ross, Jr. and JA Stephen. 2005. Oyster reef habitat restoration: relationships between oyster abundance and community development based on two studies in Virginia and South Carolina. Journal of Coastal Research 40: 64-78.
• Meyer, DL, and EC Townsend. 2000. Faunal utilization of created intertidal eastern oyster (Crassostrea virginica) reefs in the southeastern United States. Estuaries 23(1): 34-45.
• Silver Botts,P, BA Patterson and DW Schloesser. 1996. Zebra mussel effects on benthic invertebrates: physical or biotic? Journal of the North American Benthological Society 15(2): 179-184.
• Stewart, TW, JG Miner, and RL Lowe. 1998. Quantifying mechanisms for zebra mussel effects on benthic macroinvertebrates: organic matter production and shell-generated habitat. Journal of the North American Benthological Society 17(1): 81-94.
• Tolley, SG and AK Volety. 2005. The role of oysters in habitat use of oyster reefs by resident fishes and decapod crustaceans. Journal of Shellfish Research 24(4): 1007-1012.
![Page 15: Karen Kesler , Vincent Politano , Kennedy Paynter](https://reader036.vdocuments.mx/reader036/viewer/2022062310/568163a8550346895dd4b714/html5/thumbnails/15.jpg)
Questions?