Encontrados 5 documentos, a visualizar página 1 de 1
Niche segregation amongst sympatric species at exposed sandy shores with contra...
Bessa, Filipa; Baeta, Alexandra; Marques, João CarlosWrack supplies (macroalgae, seagrasses and carrion) are a common feature of sandy beaches worldwide. These allochthonous inputs are a potential high-quality food subsidy for beach fauna, but little is known about the feeding ecology and niche segregation strategies of these species in beaches with limited wrack availabilities. We used stable isotopic ratios of nitrogen and carbon to examine the diets and niche ...
Polar marine biology science in Portugal and Spain: Recent advances and future ...
Xavier, José C.; Barbosa, Andrés; Agustí, Susana; Alonso-Sáez, Laura; Alvito, Pedro; Ameneiro, Julia; Ávila, Conxita; Baeta, Alexandra; Canário, JoãoPolar marine ecosystems have global ecological and economic importance because of their unique biodiversity and their major role in climate processes and commercial fisheries, among others. Portugal and Spain have been highly active in a wide range of disciplines in marine biology of the Antarctic and the Arctic. The main aim of this paper is to provide a synopsis of some of the results and initiatives undertak...
[delta]15N and [delta]13C in the Mondego estuary food web: Seasonal variation i...
Baeta, Alexandra; Pinto, Rute; Valiela, Ivan; Richard, Pierre; Niquil, Nathalie; Marques, João C.http://www.sciencedirect.com/science/article/B6V7H-4V1KMR2-1/2/b800195eaff45d3f8489262b01e043d2
Review and evaluation of estuarine biotic indices to assess benthic condition
Pinto, Rute; Patrício, Joana; Baeta, Alexandra; Fath, Brian D.; Neto, João M.; Marques, João CarlosRecently there has been a growing interest and need for sound and robust ecological indices to evaluate ecosystem status and condition, mainly under the scope of the Water Framework Directive implementation. Although the conceptual basis for each index may rely on different assumptions and parameters, they share a common goal: to provide a useful tool that can be used in assessing the system's health and that c...
Feeding ecology of the green crab, Carcinus maenas (L., 1758) in a temperate es...
Baeta, Alexandra; Cabral, Henrique N.; Marques, João C.; Pardal, Miguel A.The feeding ecology of Carcinus maenas was studied between June 2003 and June 2004 in three areas in the Mondego estuary, Portugal. Samples were collected monthly, during the night, at high water of spring tides using a 2 m beam trawl. Among 837 stomachs examined, 25 different food items were identified. Crangon crangon, Hediste diversicolor, and Teleostei were the most important food items by occurrence, numbe...
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