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Supplementary Materials Supplementary Materials Supplementary Material 1 List of Resources used in the Identification and Assigning of Trophic Role of Invertebrate Specimens 1.1 Peer Reviewed Articles Barber, B. J., J. S. Fajans, S. M. Baker, and P. Baker. 2005. Gametogenesis in the non-native green mussel, Perna viridis, and the native scorched mussel, Brachidontes exustus, in Tampa Bay, Florida. Journal of Shellfish Research 24:1087-1095. Bergquist, D. C., J. A. Hale, P. Baker, and S. M. Baker. 2006. Development of ecosystem indicators for the Suwannee River estuary: oyster reef habitat quality along a salinity gradient. Estuaries and Coasts 29:353-360. Boudreaux, M. L., J. L. Stiner, and L. J. Walters. 2006. Biodiversity of sessile and motile macrofauna on intertidal oyster reefs in Mosquito Lagoon, Florida. Journal of Shellfish Research 25:1079-1089. Bueno, M., S. A. Dena-Silva, A. A. V. Flores, and F. P. P. Leite. 2016. Effects of wave exposure on the abundance and composition of amphipod and Tanaidacean assemblages inhabiting intertidal coralline algae. Journal of the Marine Biological Association of the United Kingdom FirstView:1-7. Coleman, C. O. 2011. Batea aldebaranae sp nov (Crustacea: Amphipoda: Bateidae) from the coast of Belize with redescriptions of two related species. Journal of the Marine Biological Association of the United Kingdom 91:455-469. Collin, R. 2002. Another last word on Crepidula convexa with a description of C. ustulatulina n. sp (Gastropoda : Calyptraeidae) from the Gulf of Mexico and southern Florida. Bulletin of Marine Science 70:177-184. Collin, R. 2000. Phylogeny of the Crepidula plana (Gastropoda : Calyptraeidae) cryptic species complex in North America. Canadian Journal of Zoology-Revue Canadienne De Zoologie 78:1500- 1514. Collin, R. 2001. The effects of mode of development on phylogeography and population structure of North Atlantic Crepidula (Gastropoda: Calyptraeidae). Molecular ecology 10:2249-2262. Cote, J., C. F. Rakocinski, and T. A. Randall. 2001. Feeding efficiency by juvenile blue crabs on two common species of micrograzer snails. Journal of Experimental Marine Biology and Ecology 264:189-208. Defreese, D. E. 1987. Ecology and Burrowing Behavior of Ascobulla ulla (Opisthobranchia, Ascoglossa). Veliger 30:40-45. deMaintenon, M. J., and P. M. Mikkelsen. 2001. Late reproductive system development in two Cephalaspideans (Gastropoda : Opisthobranchia): Bulla striata Bruguiere, 1792, and Acteocina atrata Mikkelsen & Mikkelsen, 1984. Veliger 44:237-260. 1 Supplementary Materials Douglass, J. G., J. E. Duffy, and E. A. Canuel. 2011. Food web structure in a Chesapeake Bay eelgrass bed as determined through gut contents and 13C and 15N isotope analysis. Estuaries and Coasts 34:701-711. Drumm, D. T. 2005. Comparison of feeding mechanisms, respiration, and cleaning behavior in two Kalliapseudids, Kalliapseudes macsweenyi and Psammokalliapseudes granulosus (Peracarida : Tanaidacea). Journal of Crustacean Biology 25:203-211. Drumm, D. T., and B. Kreiser. 2012. Population genetic structure and phylogeography of Mesokalliapseudes macsweenyi (Crustacea: Tanaidacea) in the northwestern Atlantic and Gulf of Mexico. Journal of Experimental Marine Biology and Ecology 412:58-65. Ewald, J. J. 1969. Observations on biology of Tozeuma carolinense (Decapoda, Hippolytidae) from Florida, with special reference to larval development. Bulletin of Marine Science 19:510-549. Franz, D. R., and J. T. Tanacredi. 1992. Secondary production of the amphipod Ampelisca abdita mills and its importance in the diet of juvenile winter flounder (Pleuronectes americanus) in Jamaica Bay, New-York. Estuaries 15:193-203. Frick, M. G., K. L. Williams, D. Veljacic, L. Pierrard, J. A. Jackson, and S. E. Knight. 2000. Newly documented epibiont species from nesting loggerhead sea turtles (Caretta caretta) in Georgia, USA. Marine Turtle Newsletter 88:3-5. Greening, H. S., and R. J. Livingston. 1982. Diel variation in the structure of seagrass-associated epibenthic macroinvertebrate communities. Marine Ecology Progress Series 7:147-156. Grizzle, R. E., J. R. Adams, and L. J. Walters. 2002. Historical changes in intertidal oyster (Crassostrea virginica) reefs in a Florida lagoon potentially related to boating activities. Journal of Shellfish Research 21:749-756. Hays, C. 2005. Effect of nutrient availability, grazer assemblage and seagrass source population on the interaction between Thalassia testudinum (turtle grass) and its algal epiphytes. Journal of Experimental Marine Biology and Ecology 314:53-68. Hoagland, K. E. 1977. Systematic review of fossil and recent Crepidula and discussion of evolution of Calyptraeidae. Malacologia 16:353-420. Houbrick, R. S. 1993. Phylogenetic relationships and generic review of the Bittiinae (Prosobranchia, Cerithioidea). Malacologia 35:261-313. Houbrick, R. S. 1980. Observations on the anatomy and life history of Modulus modulus (Prosobranchia, Modulidae). Malacologia 20:117-142. Jensen, K. R. 1994. Behavioral adaptations and diet specificity of Sacoglossan Opisthobranchs. Ethology Ecology & Evolution 6:87-101. Lefcheck, J. S., S. R. Marion, and R. J. Orth. in press. Actively restored ecosystems as a refuge for biological diversity: a case study from eelgrass (Zostera marina L.). PeerJ. 2 Supplementary Materials Lefcheck, J. S., and J. E. Duffy. 2015. Multitrophic functional diversity predicts ecosystem functioning in experimental assemblages of estuarine consumers. Ecology 96:2973-2983. Magalhaes, H. 1948. An ecological study of snails of the genus Busycon at Beaufort, North Carolina. Ecological Monographs 18:377-409. Mangum, C. P., S. L. Santos, and W. R. Rhodes. 1968. Distribution and feeding in onuphid polychaete Diopatra cuprea (Bosc). Marine Biology 2:33-40. Manning, R. B., and D. L. Felder. 1989. The Pinnixa cristata complex in the western Atlantic with a description of two new species (Crustacea: Decapoda: Pinnotheridae). Smithsonian Contributions to Zoology 473:1-26. Marin, A., L. A. Alvarez, G. Cimino, and A. Spinella. 1999. Chemical defence in Cephalaspidean gastropods: Origin, anatomical location and ecological roles. Journal of Molluscan Studies 65:121- 131. Marsh, G. A. 1976. Ecology of the gastropod epifauna of eelgrass in a Virginia, USA Estuary. Chesapeake Science 17:182-187. Martin, T. H., R. A. Wright, and L. B. Crowder. 1989. Non-additive impact of blue crabs and spot on their prey assemblages. Ecology 70:1935-1942. Malaquias, M. A. E., E. Berecibar, and D. G. Reid. 2009. Reassessment of the trophic position of Bullidae (Gastropoda: Cephalaspidea) and the importance of diet in the evolution of cephalaspidean gastropods. Journal of Zoology 277:88-97. McMahon, R. F., and W. D. Russellhunter. 1977. Temperature relations of aerial and aquatic respiration in 6 littoral snails in relation to their vertical zonation. Biological Bulletin 152:182-198. Miller, A. W., G. M. Ruiz, M. S. Minton, and R. F. Ambrose. 2007. Differentiating successful and failed molluscan invaders in estuarine ecosystems. Marine Ecology Progress Series 332:41-51. Moore, H. B., and N. N. Lopez. 1972. Contribution to ecology of Lamellibranch Anodontia alba. Bulletin of Marine Science 22:381-390. Murray, J. B., and G. L. Wingard. 2006. Salinity and temperature tolerance experiments on selected Florida Bay mollusks. US Geological Survey Open-File Report 2006-1026:1-17. Newell, R. I. E., and S. J. Jordan. 1983. Preferential ingestion of organic material by the American oyster Crassostrea virginica. Marine Ecology Progress Series 13:47-53. Oliva-Rivera, J. J. 2003. The amphipod fauna of Banco Chinchorro, Quintana Roo, Mexico with ecological notes. Bulletin of Marine Science 73:77-89. Osman, R. W., and R. B. Whitlatch. 1995. Predation on early ontogenic life stages and its effect on recruitment into a marine epifaunal community. Marine Ecology Progress Series 117:111-126. Osman, R. W., R. B. Whitlatch, and R. J. Malatesta. 1992. Potential role of micropredators in determining recruitment into a marine community. Marine Ecology Progress Series 83:35-43. 3 Supplementary Materials Paz-Ríos, C. E., N. Simões, and P. Ardisson. 2013. Intertidal and shallow water amphipods (Amphipoda: Gammaridea and Corophiidea) from Isla Pérez, Alacranes Reef, southern Gulf of Mexico. Nauplius 21:179-194. Peiro, D. F., and F. L. Mantelatto. 2011. Population dynamics of the pea crab Austinixa aidae (Brachyura, Pinnotheridae): a symbiotic of the ghost shrimp Callichirus major (Thalassinidea, Callianassidae) from the southwestern Atlantic. Iheringia Serie Zoologia 101:5-14. Posey, M. H. 1986. Changes in a benthic community associated with dense beds of a burrowing deposit feeder, Callianassa californiensis. Marine Ecology Progress Series 31:15-22. Prager, E. J., and R. B. Halley. 1999. The influence of seagrass on shell layers and Florida Bay mudbanks. Journal of Coastal Research 15:1151-1162. Radabaugh, K. 2013. Light-environment controls and basal resource use of planktonic and benthic primary production. PhD dissertation. University of South Florida, Saint Petersburg, Florida, USA. Ray, B. R., M. W. Johnson, K. Cammarata, and D. L. Smee. 2014. Changes in seagrass species composition in northwestern Gulf of Mexico estuaries: effects on associated seagrass fauna. Plos One 9:e107751. Reid, D. G., and M. Claremont. 2014. The genus Cerithideopsis Thiele, 1929 (Gastropoda: Potamididae) in the Indo-West Pacific region. Zootaxa 3779:61-80. Riisgard, H. U. 1988. Efficiency of Particle Retention and Filtration-Rate in 6 Species of Northeast American Bivalves. Marine
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