caa a22 4500 465792677 CHVBK 20180323112029.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.2307/1351787 doi (NATIONALLICENCE)springer-10.2307/1351787 Secondary production within a seagrass bed ( Zostera marina and Ruppia maritima ) in lower Chesapeake Bay [Elektronische Daten] [Thomas Fredette, Robert Diaz] Monthly sampling of a 140-ha seagrass bed in the lower Chesapeake Bay, Virginia, revealed that 13 numerically and trophically important species, representing about 20% of the total community densities over the year-long study period, accounted for the production of ≈42 g dry wt m−2 yr−1. This estimate is likely conservative due to our assumptions on voltinism and fixed size at maturity regardless of season for the species studied. The isopodErichsonella attenuata accounted for 17.6 g dry wt m−2 yr−1 or 42% of the calculated total production, while the portunid decapodCallinectes sapidus and the amphipodGammarus mucronatus each accounted for 7.7 g dry wt m−2 yr−1. The 10 remaining species (4 peracarids, 4 molluscs, and 2 decapods) each produced less than 2 g dry wt m−2 yr−1. Total seagrass-associated secondary production was estimated to equal or exceed 200 g dry wt m−2yr−1. By applying this estimate to the entire 140-ha grassbed, we projected that, on average, 4.8 metric tons dry wt of invertebrate standing stock and 55.9 metric tons of invertebrate production occur over the year. Estuarine Research Federation, 1990 Fredette Thomas Dredged Material Management Section New England Division, COE, 424 Trapelo Road, 02254-9149, Waltham, Massachusetts aut Diaz Robert Virginia Institute of Marine Scinece School of Marine Science, College of Villiam and Mary, 23062, Gloucester Point, Virginia aut Estuaries Springer-Verlag 13/4(1990-12-01), 431-440 0160-8347 13:4<431 1990 13 12237 https://doi.org/10.2307/1351787 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.2307/1351787 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fredette Thomas Dredged Material Management Section New England Division, COE, 424 Trapelo Road, 02254-9149, Waltham, Massachusetts aut NATIONALLICENCE 700 1- Diaz Robert Virginia Institute of Marine Scinece School of Marine Science, College of Villiam and Mary, 23062, Gloucester Point, Virginia aut NATIONALLICENCE 773 0- Estuaries Springer-Verlag 13/4(1990-12-01), 431-440 0160-8347 13:4<431 1990 13 12237 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer