NDLI: An investigation of salt marsh dieback in Georgia using field transplants

Content Provider	Springer Nature Link
Author	Ogburn, Matthew Bryan Alber, Merryl
Copyright Year	2006
Abstract	In 2001 and 2002, Georgia salt marshes experienced a dieback event that, affected more than 800 ha throughout the coastal zone. The dieback event was unprecedented in the state and affected bothSpartina alterniflora andJuncus roemerianus. A transplant study was conducted from May to October 2003 to determine if healthy plants could survive in dieback areas. Transplants were carried out at two locations on the Georgia coast in areas ofS. alterniflora dieback along the banks of tidal creeks, an area ofS. alterniflora dieback in the mid marsh, and aJ. roemerianus dieback, area in the mid marsh. Transplant survival was nearly 100% and growth (measured as increases in the height of the 5 tallest stems and the number of stems per experimental pot) was observed in both healthy (control) and dieback areas.J. roemerianus grew more slowly thanS. alterniflora, with no, observed increase in stem height and an average 38% increase in stem density as compared to an average 57% increase in stem height and 137% increase in stem density inS. alterniflora. Differences in growth were inconsistent but in most cases no significant differences were observed between healthy and dieback areas. Soil characteristics measured over the course of the experiment were generally comparable between healthy and dieback areas (redox potential averaged 69±123 [SD] across all observations at all sites, pH averaged 6.7 ± 0.3 and salinity averaged 24.9±4.4), but porewater ammonium (NH$_{4}$) concentration was often higher in dieback areas (overall mean NH$_{4}$ concentration, was 138±127 μM in dieback areas versus 33±40 μM in healthy areas). These results suggest that the cause of dieback was no, longer present at the time of this study and that transplants are a possibility for restoring affected areas.
Starting Page	54
Ending Page	62
Page Count	9
File Format	PDF
ISSN	15592723
Journal	Estuaries
Volume Number	29
Issue Number	1
e-ISSN	15592731
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Environment Ecology Geosciences Freshwater & Marine Ecology Environmental Management Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics

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