نتایج جستجو برای: species abundance distribution
تعداد نتایج: 1161462 فیلتر نتایج به سال:
It is important to study the species-abundance distribution pattern in a community reveal mechanism of assembly. Six abundance models (log-normal model, Zipf Zipf–Mandelbrot broken stick niche preemption and Volkov model) were used fit six scales (10 m × 10 m, 20 40 ×40 60 80 100 m) fixed, semifixed, mobile sand dunes Gurbantünggüt Desert, respectively. The best-fitting model was determined usi...
The species abundance distribution (SAD) is one of the few universal patterns in ecology. Research on this fundamental distribution has primarily focused on the study of numerical counts, irrespective of the traits of individuals. Here we show that considering a set of Generalized Species Abundance Distributions (GSADs) encompassing several abundance measures, such as numerical abundance, bioma...
fish species diversity, distribution and abundance were studied in the sardabrud and chalus rivers, in the southern caspian sea basin, during 1992 and 1993 in five and four stations respectively, by monthly collections using electrofishing device. in total, 3200 fish specimens, including 15 species in sardabrud river and 12 species in chalus river, were investigated. the fish comprised of 13 ge...
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