نتایج جستجو برای: margalef d
تعداد نتایج: 577766 فیلتر نتایج به سال:
This study aimed to evaluate the relationship of edaphic fauna under a no-tillage system with different levels soybean productivity [High (NTH), Medium (NTM) and Low (NTL)] in west Santa Catarina (Brazil), identifying which chemical physical variables most affect them, best indicators that can be used. Native forest (NF) areas were used as reference. A total 207 samples soil collected by monoli...
Citation: Rull V, Montoya E, Seco I, Cañellas-Boltà N, Giralt S, Margalef O, Pla-Rabes S, D’Andrea W, Bradley R and Sáez A (2018) CLAFS, a Holistic Climatic-Ecological-Anthropogenic Hypothesis on Easter Island’s Deforestation and Cultural Change: Proposals and Testing Prospects. Front. Ecol. Evol. 6:32. doi: 10.3389/fevo.2018.00032 CLAFS, a Holistic Climatic-Ecological-Anthropogenic Hypothesis ...
The objective of the study was to determine whether long-term metal pollution affects communities of epigeal spiders (Aranea), studied at three taxonomic levels: species, genera, and families. Biodiversity was defined by three indices: the Hierarchical Richness Index (HRI), Margalef index (D(M)) and Pielou evenness index (J). In different ways the indices describe taxa richness and the distribu...
To overcome sinking, plankton have devised various types of strategies. One is swimming, that is, an active, energy-consuming self-propulsion than can oppose gravitational sinking. Other phytoplankters can modify their buoyancy, becoming, at least for some time, positively buoyant. Others can exploit the turbulence in the mixed layer, using it to stay suspended for longer times. This latter opt...
Information of vegetation structure and composition terrestrial flora biodiversity can be measured by analysis method. The method requires sampling plots as a measurement plot capable to describe species in forest stand. distribution diversity, especially plants, is relatively dependent on the type plant with condition area it occupies. Therefore, an efficient representative needed for ecosyste...
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