The depletion of forest in developing countries due to extended pastures, agricultural land, fuel wood and etc. is a serious concern. Therefore planting trees for reforestation and extended forest area is a essential assignment. Forest plantation with a basic criterion affects to understory plant diversity. This effects may make some species absent or appear. The objective of this study is to a...

An investigation of phytoplankton community and water quality for M River was conducted in December 2019.The results showed that 38 species belonging to 6 phyla 26 genera were collected. Among them, Bacillariophyta is the richest species, which accounted 34.21%, followed by Cyanophyta with 26.32% Chlorophyta 28.95%. The density 63.0*106 inds/L indicated as eutrophic body. highest Bacillariophyt...

In the past 30 years, Northwest China has experienced a warm and humid climate increase trend. How this change will affect species diversity of plant communities is hot issue in ecological research. study, four α indexes were applied 29 shrub at desert sites Xinjiang, including Margalef index, Simpson Shannon–Wiener Pielou to explore relationship between factors (mean annual temperature (MAT) m...

Long-term variability of bioassessments has not been well evaluated. We analyzed a 20-year data set (1984-2003) from four sites in two northern California streams to examine the variability of bioassessment indices (two multivariate RIVPACS-type O/E scores and one multimetric index of biotic integrity, IBI), as well as eight metrics. All sites were sampled in spring; one site was also sampled i...

The Diserud-Ødegaard multiple-site similarity index makes use of data on species shared by two or more sites, but produces equal similarity values in two different circumstances: species loss and true species turnover. We developed a new multiple-site similarity measure, which is independent of richness and performs better than the Diserud-Ødegaard index under conditions of equal richness betwe...

Question: What are the qualitative and quantitative long-term changes in the vascular epiphyte assemblage on a particular host tree species? Location: Lowland rain forest of the San Lorenzo Crane Plot, Republic of Panama. Methods: We followed the fate of the vascular epiphyte assemblage on 99 individuals of the palm Socratea exorrhiza by three censuses over the course of five years. Results: Th...

Results The differences in thermal physiology between ectotherms and endotherms result in geographically disparate macrophysiological constraints. Field metabolic rate (FMR) is stable or decreases slightly with temperature for endotherms, while it generally increases for ectotherms, leading to opposing latitudinal gradients of expected FMR. Potential activity time is a greater constraint on the...

The aim of this investigation was to assess the differences in terms α-diversity, species composition and trophic structure between peracarid assemblages inhabiting artificial hard substrates those present on natural ones at two sites Western Mediterranean Sea. In each one, samples were collected from substrates, extracted peracarids identified level. Each sample characterised by its Total Abun...