عنوان

Long-Term Surveys Show Invasive Overbite Clams (Potamocorbula amurensis) are Spatially Limited in Suisun Marsh, California

Number

LA6fd377s4

.Language of Text, Soundtrack etc

انگلیسی

Title Proper

Long-Term Surveys Show Invasive Overbite Clams (Potamocorbula amurensis) are Spatially Limited in Suisun Marsh, California

General Material Designation

[Article]

First Statement of Responsibility

Baumsteiger, Jason; Schroeter, Robert E.; O'Rear, Teejay; Cook, Jonathan D.; Moyle, Peter B.

Text of Note

The overbite clam (Potamocorbula amurensis) is a major invasive species in the San Francisco Estuary, California, and has been implicated in the decline of pelagic productivity and native fish species. Little is known of its impact on Suisun Marsh, a large brackish tidal region of the estuary. We looked at the abundance and spatial distribution of clams in the marsh, including examining the influence of water quality, using long-term (1988-2015) otter trawl surveys. Temporal trends indicated that overbite clam abundance has been increasing, but adult clams were spatially restricted to a single large slough (Suisun). Clams were absent from most interior channels, limiting their overall effect on the marsh aquatic ecosystem. Abiotic variables, particularly salinity, proved important predictors of overbite clam abundance, although the variables examined alone could not explain overbite clam distributions. We propose that connectivity, detritus loads, and/or predation pressure may work in conjunction with abiotic variables to cause poor survival rates for recruits in interior marsh sites, keeping the distribution limited. Overall results are encouraging for restoration projects in brackish tidal marshes that need to deal with overbite clams.

Date of Publication

2017

Title

San Francisco Estuary and Watershed Science

Volume Number

15/2

Entry Element

Baumsteiger, Jason; Schroeter, Robert E.; O'Rear, Teejay; Cook, Jonathan D.; Moyle, Peter B.

Electronic name

[Article]

275578

a

Y