NDLI: Effects of pipeline construction on the vegetation and macrofauna of two South Carolina, USA salt marshes

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Effects of pipeline construction on the vegetation and macrofauna of two South Carolina, USA salt marshes

Content Provider	Springer Nature Link
Author	Knott, David M. Wenner, Elizabeth L. Wendt, Priscilla H.
Copyright Year	1997
Abstract	We examined the recovery of vegetation and salt marsh macrofauna in a pipeline construction corridor at two locations where it intersected intertidal salt marshes near Charleston, SC. The impacts of construction were evaluated prior to construction and for subsequent periods of 34 and 46 months at the two sites using aerial photography and three field sampling methods. Quadrats were used to estimate densities of selected salt marsh invertebrates, as well as stem densities and aboveground wet-weight biomass ofSpartina alterniflora; pit traps were employed to simulate natural tidal pools for sampling small, motile epibenthic macrofauna that remained on the marsh surface at low tide; and flume nets were used to sample the natant macrofauna that used the marsh edge at high tide. The analyses of vegetation by quadrat and aerial imagery clearly showed that the recovery ofSpartina was more rapid and complete at the Ashley River site (88%) than at Wappoo Creek (48%). In contrast to this apparent, if partial, vegetative recovery, several salt marsh invertebrates, including,Littorina irrorata andGeukensia demissa, were eliminated from the corridor during construction and showed scant recovery by the end of our study. Differences in species composition and abundance of natant organisms in the flume net collections also supported the conclusion that faunal recovery was incomplete after 3–4 years at these sites. The recovery of functional equivalency of the excavations, compared with natural marshes, was not evaluated during our study, but we speculate that their functioning may equilibrate over time, since preexisting hydrologic conditions are more or less intact, seedstock forSpartina revegetation is nearby, and macrofauna will probably eventually reestablish themselves from adjacent areas.
Starting Page	65
Ending Page	81
Page Count	17
File Format	PDF
ISSN	02775212
Journal	Wetlands
Volume Number	17
Issue Number	1
e-ISSN	19436246
Language	English
Publisher	Springer Netherlands
Publisher Date	1997-01-01
Publisher Institution	Society of Wetland Scientists
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	aerial photography Anchoa mitchilli backfilling environmental impact Fundulus heteroclitus Geukensia demissa halophyte invertebrate Leiostomus xanthurus Littorina irrorata macrofauna pipeline construction restoration salt marsh Spartina alterniflora Uca pugnax Freshwater & Marine Ecology Environmental Management Ecology Hydrogeology Coastal Sciences Landscape Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Environmental Chemistry

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