نتایج جستجو برای: plant distribution
تعداد نتایج: 981981 فیلتر نتایج به سال:
The plant size distribution differs systematically across developed and developing countries. For example, in developing countries, less than one fifth of 1% of plants are large (employ 100 or more employees) and account for about one fifth of total employment. In sharp contrast, in developed countries, more than 1.6% of plants are large and account for more than two fifth of total employment. ...
The aim of this research was to identify the plant species, introducing the flora and plant geographical distribution of Chaghalvandi area, Lorestan Province. This area, with 2000 hectares, is situated in the north of Lorestan Province, where the amount of annual precipitation is 481.79 mm and mean annual temperature is 15.32°C. Plant samples were collected from different parts of the area betw...
The distribution of plants along environmental gradients is constrained by abiotic and biotic factors. Cumulative evidence attests of the impact of biotic factors on plant distributions, but only few studies discuss the role of belowground communities. Soil fungi, in particular, are thought to play an important role in how plant species assemble locally into communities. We first review existin...
Tracing sources of water utilised by plants is important to understand species interactions in intercropping/agroforestry systems, particularly where species vary greatly in life-form. Isotopic techniques are an increasingly common means to trace water sources. The distribution of stable isotopes of water within the soil±plant±atmosphere continuum is indicative of a range of hydrologic processe...
Assessment of forest soil and vegetation characteristics provides basic and essential information for the protection and rehabilitation measures in forest ecosystems. Therefore, regard to the importance of this issue, the distribution of different soil properties and vegetation diversity in relation to conservation management and degradation investigated in the oak forests of Ilam province usin...
The pattern of root distribution in layered soils is one of the significant issues in the calculations of soil water and irrigation management and planning. The objective of this study was to determine the pattern of root distribution of soybean in layered soils and its effect on water uptake. The research was conducted in a completely randomized design with 15 treatments consisting of three di...
Inference of evolutionary trees and rates from biological sequences is commonly performed using models of character change that incorporate rate variation across sites. Though an incorrect proof of the identifiability of the GTR+Γ+I model has been published, very little has been rigorously established concerning the identifiability of the models currently in common use in data analysis. Here we...
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