NDLI: Historical Land Use, Nitrogen, and Coastal Eutrophication: A Paleoecological Perspective

Content Provider	Springer Nature Link
Author	Brush, Grace S.
Copyright Year	2008
Abstract	Organisms and chemicals preserved in sediment cores from the Chesapeake estuary in mid-Atlantic USA are consistent with a precolonial landscape covered with a diversity of forests and marshes, large and small. During the past 300 years, many of the wetlands have been drained, and the landscape was converted to agricultural fields and urban and suburban development. During this time, sources of nitrogen have diversified, and loadings have increased. Since precolonial time, the mesohaline estuary has become increasingly eutrophic and anoxic. Estuaries and coastal regions throughout the world have experienced similar conditions in their recent history. These changes are recorded in Chesapeake sediment cores by increases in ragweed pollen, dry taxa, sedimentation rates, nitrogen influxes, and a major change in estuarine autotrophs from benthic to planktonic. In many areas, attempts to reverse estuarine eutrophication and anoxia have centered on restoring streams and riparian areas and reducing fertilizer use on agricultural lands. However, data from soils and historical reports and the paleoecological record suggest that to reduce the effects of modern nitrogen inputs, it may be necessary to locate and enhance denitrifying areas throughout the watershed.
Starting Page	18
Ending Page	28
Page Count	11
File Format	PDF
ISSN	15592723
Journal	Estuaries
Volume Number	32
Issue Number	1
e-ISSN	15592731
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-10-16
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Estuary Landscape Paleoecology Nitrogen fixation Eutrophication Anoxia Denitrification Nature Conservation Environmental Management Freshwater & Marine Ecology Earth Sciences Ecology Environment
Content Type	Text
Resource Type	Article
Subject	Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics

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Historical Land Use, Nitrogen, and Coastal Eutrophication: A Paleoecological Perspective

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