نتایج جستجو برای: richness margalef index
تعداد نتایج: 415206 فیلتر نتایج به سال:
recognizing the herbaceous plant species diversity could use as an importantindicator applied for the rangeland and forests management. considering the presence ofvegetation and animal husbandry in zagros region, iran, being aware of the diversity andrichness of plant species is necessary to management or the destructed vegetationrestoration. in order to study the effect of aspect and elevation...
Exclosure is considered as a management method to improve vegetation. This study aimed to evaluate the effects of exclosure on species diversity in Zayanderod dam station in Chadegan, Isfahan. The study area was stratified based on the various management types and slope directions, and samples were collected randomly in each layer. Four perpendicular transects, 500m in length were established a...
In Indonesia, transgenic products are still considered innovative, and genetically modified (GM) maize has stayed on the market while its impact environmental biosafety is now being evaluated. Bt corn been recognized as one of solutions to problem Asian cob borers preserve production. Therefore, this study aimed investigate effect arthropod richness diversity in a limited testing field using ra...
Forest degradation influences ecosystem sustainability and reduces plant species diversity. Plantations with coniferous trees in degraded ecosystems help the native species to become established and play a major role in preserving and improving plant diversity. This study aims at measuring and comparing the woody species diversity across different age classes of Pinus brutia and Cupressus horiz...
Both fertilizer and plant species richness may affect the soil nematode community. However, influence of weed interaction is unclear. Nematode abundance biodiversity in wheat plots treated with nitrogen, phosphate potassium addition (0, 1, 2 4 levels) were investigated a long-term microcosm experiment established 2010 at Kaifeng, China. The results demonstrated that treatment increased total ne...
Knowledge of the relationships between biotic components of rangeland ecosystem i.e. herbivores and plants is important for range managers. In order to study herbivorse grazing intensity on plant species diversity, an experiment was conductef using fuor grazing treatments in darrehshar rangelands, Ilam province in 2015. Plant species data were taken based on a randomized-systematic sampling met...
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...
In the study, International Waterbird Census (IWC) conducted in 2021 wetlands with different habitat characteristics around Dardanelles were evaluated. 3086 individuals belonging to 30 waterbird species counted Kavak Delta, 31 and 1150 Çardak Lagoon, 22 3906 Gökçeada Salt Lake, 11 289 Suvla Lake 8 84 Uzunhızırlı Pond. The highest diversity (Shannon-Wiener Indices, H: 2,473) richness (Margalef I...
This paper presents the spatial and temporal variation in diversity of malacofauna relation to water chemistry Aripal stream Kashmir Himalaya. A total 12 species were reported which belong four families, Lymnaeidae, Physidae, Planorbidae, Bithyniidae from class Gastropoda, two Cyrenidae Pisidiidae Bivalvia. The family Planorbidae contributed 34% annual molluscan population followed by Lymnaeida...
Recognizing the herbaceous plant species diversity could use as an importantindicator applied for the rangeland and forests management. Considering the presence ofvegetation and animal husbandry in Zagros region, Iran, being aware of the diversity andrichness of plant species is necessary to management or the destructed vegetationrestoration. In order to study the effect of aspect and elevation...
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