Results 231 to 240 of about 929,968 (266)
Some of the next articles are maybe not open access.
Validation of the species composition index
Agricultural Systems, 1986Abstract This paper is a validation of the Species Composition Index (SCI). The SCI is a data-handling technique which expresses the botanical composition of a sward as a vector. Inclusion of these vectors allows the incorporation, in response models, of the dynamic changes in species composition of sods which occur over time.
Ronald L. Mitchell +2 more
openaire +1 more source
[Species composition of mycococci].
Mikrobiologiia, 1980The phenotypical similarity between 34 microbial strains was determined, and they were classified on the principle of maximal general similarity in 70 traits. All the strains were subdivided into three groups within which the similarity of the strains was not less than 85%. The groups correspond to the species Mycococcus capsulatus, M.
I B, Kogan +2 more
openaire +1 more source
Statistical Interpretation of Species Composition
Journal of the American Statistical Association, 2001The relative abundance of different species characterizes the structure of a biological community. We analyze an experiment addressing the relationship between omnivorous feeding linkages and community stability. Our goal is to determine whether communities with different predator compositions respond similarly to environmental disturbance. To evaluate
Billheimer D., Guttorp P., Fagan W.F.
openaire +2 more sources
Effects of tree species composition on within-forest distribution of understorey species
Applied Vegetation Science, 2005AbstractQuestion: Do tree species, with different litter qualities, affect the within‐forest distribution of forest understorey species on intermediate to base‐rich soils? Since habitat loss and fragmentation have caused ancient forest species to decline, those species are the main focus of this study.Location: Three ancient forests, along a soil ...
van Oijen, D. +4 more
openaire +1 more source
“Australopithecus afarensis”: A composite species
Primates, 1992In response to a critique byFerguson (1989),Leonard (1991) reiterates most of his original arguments for supporting “Australopithecus afarensis”Johanson, White, andCoppens, 1978 as a single species. He disregards the principle of morphological equivalence by comparing the dental metrics and morphology of a hominid with those of species of the Pongidae,
openaire +1 more source
Species Composition in a Complex of Woodlands
1985The Northcliffe/Heaton complex of woodlands lies two miles northwest of Bradford city centre in two deep ice-cut valleys which run approximately west to east and join at their eastern extremities. They form a continuous, roughly semi-circular arc of woodland approximately three kilometers in length.
D. F. Andrews, A. M. Herzberg
openaire +1 more source
Impact of forest community species composition on litter species composition
Acta Ecologica Sinica, 2015万春红 Wan Chunhong +6 more
openaire +1 more source
Taxonomic Structure: Species Composition
2015Terrestrial ecologists long ago remarked on the richness of the floras and faunas of tropical environments relative to colder climates. The diversification within many specific taxonomic groups is clearly greater in the tropics than in temperate latitudes, both in terrestrial and in marine environments. Coastal environments support many more species of
openaire +1 more source
Species composition of barids in Dagestan
Russian Agricultural Sciences, 2007A species identification of a community of barids in Dagestan has been carried out for the first time and the dominance of Baris coerulescens Scop., colonizing only cabbage seed plantations and amounting to 75–80% of the total numbers of pests, has been revealed.
openaire +1 more source