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Relationships between wintering waterbirds and invertebrates, sediments and hydrology of coastal marsh ponds

January 1, 2004

We studied relationships among sediment variables (carbon content, C:N, hardness, oxygen penetration, silt-clay fraction), hydrologic variables (dissolved oxygen, salinity, temperature, transparency, water depth), sizes and biomass of common invertebrate classes, and densities of 15 common waterbird species in ponds of impounded freshwater, oligohaline, mesohaline, and unimpounded mesohaline marshes during winters 1997-98 to 1999-2000 on Rockefeller State Wildlife Refuge, Louisiana, USA. Canonical correspondence analysis and forward selection was used to analyze the above variables. Water depth and oxygen penetration were the variables that best segregated habitat characteristics that resulted in maximum densities of common waterbird species. Most common waterbird species were associated with specific marsh types, except Green-winged Teal (Anas crecca) and Northern Shoveler (Anas clypeata). We concluded that hydrologic manipulation of marsh ponds is the best way to manage habitats for these birds, if the hydrology can be controlled adequately.

Citation Information

Publication Year 2004
Title Relationships between wintering waterbirds and invertebrates, sediments and hydrology of coastal marsh ponds
DOI 10.1675/1524-4695(2004)027[0333:RBWWAI]2.0.CO;2
Authors F. Bolduc, A. D. Afton
Publication Type Article
Publication Subtype Journal Article
Series Title Waterbirds
Series Number
Index ID 70026644
Record Source USGS Publications Warehouse
USGS Organization Louisiana Cooperative Fish and Wildlife Research Unit