La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Influences of Salinity and Light Availability on Abundance and Distribution of Tidal Freshwater and Oligohaline Submersed Aquatic Vegetation
Auteurs :	Erin C. Shields, Auteur ; Kenneth A. Moore, Auteur ; David B. Parrish, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (35(2) MAR 2012)
Article en page(s) :	515-526
Résumé :	Submersed aquatic vegetation (SAV) communities have undergone declines worldwide, exposing them to invasions from non-native species. Over the past decade, the invasive species Hydrilla verticillata has been documented in several tributaries of the lower Chesapeake Bay, Virginia. We used annual aerial mapping surveys from 1998 to 2007, integrated with spatial analyses of water quality data, to analyze the patterns and rates of change of a H. verticillata-dominated SAV community and relate them to varying salinity and light conditions. Periods of declining SAV coverage corresponded to periods where salinities exceeded 7 and early growing season (April to May) Secchi depths were

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