期刊
SCIENCE
卷 325, 期 5944, 页码 1124-1128出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1176516
关键词
-
资金
- U.S. Army Corps of Engineers, Norfolk District
- National Oceanic and Atmospheric Administration, Chesapeake Bay Office
Native oyster species were once vital ecosystem engineers, but their populations have collapsed worldwide because of overfishing and habitat destruction. In 2004, we initiated a vast (35-hectare) field experiment by constructing native oyster reefs of three types (high-relief, low-relief, and unrestored) in nine protected sanctuaries throughout the Great Wicomico River in Virginia, United States. Upon sampling in 2007 and 2009, we found a thriving metapopulation comprising 185 million oysters of various age classes. Oyster density was fourfold greater on high-relief than on low-relief reefs, explaining the failure of past attempts. Juvenile recruitment and reef accretion correlated with oyster density, facilitating reef development and population persistence. This reestablished metapopulation is the largest of any native oyster worldwide and validates ecological restoration of native oyster species.
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