The article evaluates the dependence of most common indices species diversity on sample size and determines their ability to differentiate between different types ecosystems, with a special emphasis discriminating natural anthropogenic ecosystems. An approach adjusting reduce was also proposed. study conducted in seven ecosystems: four were three anthropogenically transformed. Samples soil anim...

the aim of this study is comparison of soil characteristics and biodiversity in plantation of bald cypress and caucasian alder forest stands in kludeh region (mazandaran province). in order to study biodiversity in forest stands and control region, 10 sample plots (releve) were selected and the name and abundance of plant species of the forest floor were recorded. biodiversity of herbal plants ...

Species diversity is one of the most important indices used for evaluating the sustainability of forest communities. This study aims to characterize the forest communities and to identify and compare the plant species diversity in the study area. For this purpose, 152 relevés were sampled by a randomized-systematic method, using the Braun-Blanquet scale. Classification of the vegetation was con...

Consumer and resource control of diversity in plant communities have long been treated as alternative hypotheses. However, experimental and theoretical evidence suggests that herbivores and nutrient resources interactively regulate the number and relative abundance of coexisting plant species. Experiments have yielded divergent and often contradictory responses within and among ecosystems, and ...

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...

The significance of biodiversity research is to understand the structure and function community, then protect monitor community. metric base conservation. Species richness evenness are most common descriptors biodiversity. Whether it diversity information measure, probability measure or geometric they all express combination species in different ways. This study presents a new biologically mean...

Arthropods are the most dominant fauna in cave realms. Ecological studies of cave-dwelling arthropods essential for ecosystem conservation. This study was conducted to determine ecological aspects macroarthropods Cikarae Cave, West Java, focusing on their diversity, distribution, and community structure. The passage divided into three zones based environmental disparities. Data collection carri...

The Ruzizi River, the outlet of Lake Kivu in Albertine Rift, flows into Tanganyika and is important for hydropower generation irrigation. impacts 2 dams River on macroinvertebrate community composition diversity were surveyed every 3 months from December 2015 to October 2017. Macroinvertebrate samples collected at sites upstream downstream additionally two further dams, both comparatively prist...

15 The geodiversity of Crete is quantified in this study, based on the classification of 16 geomorphometric, geological and climatic factors. A number of geomorphometric variables, 17 extracted from the ASTER Global Digital Elevation Model (ASTER G-DEM) in conjunction 18 with geological and climatic information, are evaluated through various algorithms incorporated 19 into Geographical Informat...