La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Effects of Environmental Variation and Non-point Source (NPS) Nutrient Pollution on Aquatic Plant Communities in Weeks Bay National Estuarine Research Reserve (WBNERR), AL
Auteurs :	Molly M. Miller, Auteur ; Scott W. Phipps, Auteur ; Clinton S. Major, Auteur ; Kelly M. Major, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (34(6) NOV 2011)
Article en page(s) :	1182-1193
Résumé :	This study was designed to investigate non-point source nutrient pollution and its influences on submerged aquatic plant community structure and biological invasion in the Weeks Bay National Estuarine Research Reserve (WBNERR). A monthly vegetation survey was conducted to document plant abundance and changes in community structure; physicochemical data and water samples were collected on a bi-monthly basis to monitor environmental conditions (i.e., pH, salinity, dissolved oxygen, light intensity, and attenuation) and water column nutrient (NO(2)(-)/NO(3)(-) and NH(4)(+)) and chlorophyll a concentrations. A total of seven submerged aquatic species were identified at the WBNERR with the occurrence of only one non-native species (Hydrilla verticillata). Statistical analyses suggest that water column nitrogen concentrations along with variations in dissolved oxygen (0.6-11.5 mg L(-1)), light attenuation, pH (5.6-8.6), and temperature (11-33 degrees C) play key roles in determining the aquatic plant abundance and distribution in the WBNERR.

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