Influence of environmental factors on a Halodule wrightii Ascherson meadow in northeastern Brazil
نویسندگان
چکیده
منابع مشابه
Responses of the molluscan fauna to environmental variations in a Halodule wrightii Ascherson ecosystem from Northeastern Brazil.
This study observed the spatial and temporal distributions of molluscs in a Halodule wrightii meadow, verifying if they respond satisfactorily to seasonal changes in this seagrass ecosystem. Twenty-four species were identified. Chitons were rare, bivalves had greater number of species (11), followed by gastropods (9) which were also the most abundant class (73%). All classes were more abundant ...
متن کاملQuantification and classification of the main environmental impacts on a Halodule wrightii seagrass meadow on a tropical island in northeastern Brazil.
Multiple stress mechanisms have caused a worldwide decrease in seagrasses, which are vulnerable to environmental and/or anthropogenic pressure. The loss of seagrass meadows of Halodule wrightii is reported for the littoral of Itamaracá Island (Northeastern Brazil). The present study identified the main anthropogenic factors that negatively influenced over the abundance and distribution of seagr...
متن کاملINFLUENCE OF THE SHOOT DENSITY OF Halodule wrightii ASCHERSON FROM ROCKY AND SANDY HABITATS ON ASSOCIATED MACROALGAL COMMUNITIES
This study evaluated the influence of the shoot density of the shoal grass Halodule wrightii on the composition of the associated algal community, in rocky and sandy habitats on the coast of Ceará in northeastern Brazil. The phycological community included 18 species in 10 families, members of Rodophyta (72.2%), Chlorophyta (22.2%) and Phaeophyceae (5.5%). The largest proportion were epilithic ...
متن کاملNitrogenase Activity Associated with Halodule wrightii Roots.
Nitrogen fixation (acetylene reduction) associated with roots of the seagrass Halodule wrightii was measured offshore near Beaufort and Moorhead City, N.C. Rates of acetylene reduction were higher in aerobic than in anaerobic assays and were linear for up to 5 days. The temperature range for acetylene reduction was 15 to 35 degrees C with a maximum activity at 35 degrees C. Nitrogenase activity...
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ژورنال
عنوان ژورنال: Brazilian Journal of Aquatic Science and Technology
سال: 2014
ISSN: 1983-9057,1808-7035
DOI: 10.14210/bjast.v18n2.p31-41