نتایج جستجو برای: bioclimatic variables
تعداد نتایج: 314449 فیلتر نتایج به سال:
Abstract. The Köppen–Geiger classification scheme provides an effective and ecologically meaningful way to characterize climatic conditions has been widely applied in climate change studies. Significant changes the Köppen climates have observed projected last 2 centuries. Current accuracy, temporal coverage spatial resolution of historical future maps cannot sufficiently fulfill current needs r...
Temperature is an important factor determining the abundance, distribution and diversity of termite species. Thus, termites are affected by changing climate have to adopt different means surviving in order avoid extinction. Using occurrence data, bioclimatic variables vegetation cover, we modelled predicted current future habitat suitability for mound-building Nigeria. Of 19 index (NDVI) tested...
Chronic elevated nitrogen (N) deposition can have adverse effects on terrestrial ecosystems. For large areas of northern Canada distant from emissions sources, long-range atmospheric transport N may impact plant species diversity, even at low levels. The objective this study was to establish community thresholds for under multiple environmental gradients using gradient forest analysis. Plant ab...
Natural populations across a species range demonstrate population structure owing to neutral processes such as localized origins of mutations and migration limitations. Selection also acts on a subset of loci, contributing to local adaptation. An understanding of the genetic basis of adaptation to local environmental conditions is a fundamental goal in basic biological research. When applied to...
Data on projected climate conditions for the future is essential many applications in change impact studies. Yet, with release of CMIP6, increasing amount data poses challenges users to access and process data. Here we present chelsa_cmip6 package create bioclimatic variables climatological normals based CHELSA ver. 2.1 cloud CMIP6 user defined geographical extents. The offers simple servers. I...
Many distribution models developed to predict the presence/absence of invasive alien species need to be fitted to a training dataset before practical use. The training dataset is characterized by the number of recorded presences/absences and by their geographical locations. The aim of this paper is to study the effect of the training dataset characteristics on model performance and to compare t...
We used correlative models with species occurrence points, Moderate Resolution Imaging Spectroradiometer (MODIS) vegetation indices, and topo-climatic predictors to map the current distribution and potential habitat of invasive Prosopis juliflora in Afar, Ethiopia. Time-series of MODIS Enhanced Vegetation Indices (EVI) and Normalized Difference Vegetation Indices (NDVI) with 250 m2 spatial reso...
the recognition of human bioclimatic comfort in geographical area is an important factor for planning of ecotourism. climate is a very important component to identify natural landscape values. for better planning and management of landscape units such as recreational purposes, there is a need for emphasis on the visual aesthetic aspects, and also for understanding the climatic effects on recrea...
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