نتایج جستجو برای: ecological functions
تعداد نتایج: 587215 فیلتر نتایج به سال:
www.sciencemag.org (this information is current as of February 2, 2009 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/323/5910/133 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/1162986/DC1 can be found at:...
interrupting the processes which control ecosystem resources has dramatic impacts on the rangeland conditions. to protect ecosystems and landscape, it needs to understand the ecosystem processes which regulate the ecosystem resources. as main components of ecosystems, patches and inter-patches play important roles in energy and materials cascade. ecologically, functional parameters such as stab...
Traditional flood control systems always have a conflict with natural ones, i.e., rivers in cities are usually straight and smooth, whereas natural ones are according to ecological mechanisms. Social and economic developments in the modern world require a new system combining ecological needs and traditional flood control system. Ecological flood control systems were put forward and defined as ...
in this paper, we consider a new class of analytic functions in the unit disk using polynomials of order alpha. we give some sufficient conditions for functions belonging to this class.
We gathered information on the functional traits of the most representative copepod species in the Mediterranean Sea. Our database includes 191 species described by 7 traits encompassing diverse ecological functions: minimal and maximal body length, trophic group, feeding type, spawning strategy, diel vertical migration and vertical habitat. Cluster analysis in the functional trait space reveal...
We revealed abiotic components (extracellular polymeric substances, EPSs) in the periphytic biofilms. Further, effect of microbial community on EPS, and geodistribution patterns ecological functions EPS were studied. In nature, most microorganisms grow as aggregates, flocs, or biofilms [1, 2], held together by a self-produced matrix extracellular substances (EPSs) [3]. Periphytic are typical ex...
iv abstract this study examined the linguistic behaviors of two iranian efl teachers each of them teaching learners of two similar proficiency levels, a beginner level and an intermediate level, to investigate the relationship between the learners proficiency levels and the amounts and purposes for l1 use by the two teachers. the study was carried out to investigate whether there were differe...
Inland aquatic ecosystems, such as streams, rivers, ponds and lakes, play an important role in maintaining global biodiversity ecosystem services. They have been increasingly influenced by environmental change warming, dam construction, habitat fragmentation, eutrophication urbanization. However, our understanding of the impact on functions remains elusive. The aim this special issue is to high...
Recent studies suggest that differences in species composition across habitat types lead to increased multifunctionality on the regional scale. However, data about turnover—and especially complementarity functional composition—across neighbouring from natural communities are rare. We studied frog lowland rainforest Malaysian Borneo and compared functional-trait of different (alluvial forest, li...
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