Calculation of the number of samples needed to estimate the species richness of a taxocenespecies-area” curvegamma-distributionparameter estimationA formula to calculate the area of samples that would provide the necessary level of completeness for a species richness survey of a cenosis has been ...
Averaged species accumulation curves calculated by randomly assigning the order of trapping periods are smooth curves that are a better estimate of species richness and a more useful tool for determining the trapping effort required to adequately survey a site. We extend this concept of randomly ...
the expected number of species in each year, had the number of individuals caught been equal to the lowest total abundance observed in any year in the time series (if the lowest number was lower than ten individuals, we calculated the rarefied richness for ten individuals). ...
calculation of parametersspecies biomassspecies-areaFive methods of computing species richness in community are discussed using the example of a well-studied macrophytic taxocoen: (1) fitting an ogive for lognormal distribution; (2) model fitting of a rank curve for this distribution; (3) ...
Species richness is more important for ecosystem functioning than species turnover along an elevational gradient Article 20 September 2021 Background & Summary A major challenge in ecology is to understand the processes underlying community assembly and biodiversity patterns across space1,2. Over the ...
The rarefaction curve serves as a potent tool in assessing biological diversity—an importance that extends to ecological health assessment, biodiversity preservation, and resource management. By analyzing the form and gradient of the curve, we can infer species diversity and richness within ecological ...
Pattern of Species Richness along Altitudinal Gradient in Tongbiguan Nature Reserve, Southwest China and with A Discussion on Calculation Methods of Species Density铜壁关自然保护区种子植物物种丰富度的海拔梯度格局——兼论物种密度的计算方法 HE Xi,DU Fan,YANG Yu-ming,YIN Wu-yuan,ZHUANG Cui-zhen,YAN...
Table 3. Species richness calculation by cells. Number of Species01–199200–399400–699700–9991000–1457 Cells 145 470 71 35 11 8 % 19.59 63.51 9.59 4.73 1.49 1.22 Download: Download high-res image (934KB) Download: Download full-size image Fig. 1. Species richness mapped in 0.15 ×...
Spatial environmental heterogeneity (EH) is an important driver of species diversity, and its influence on species richness has been analysed for numerous taxa, in diverse ecological settings, and over a large range of spatial scales. The variety and ambiguity of concepts and terminology, however, ...
Mosaic to new raster was then used in groups of 200 species, then all mosaics added to determine overall richness for reptiles, and richness for reptiles in trade, and the percentage of reptiles in trade determined using the raster calculator ((traded_species/all_species)*100). Other trends,...