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Ground beetle communities found in the suburbs of oil wells of oil fields in Khoiniki district (Republic of Belarus)

100%

Halinouski M., Potapov D., Averin V., Demidenko O.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

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2021

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tom 25

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Quantitative studies on Gammarus Fabr. genus in Puck Bay [the Baltic Sea]

100%

Jeczmien W., Szaniawska A.

Polskie Archiwum Hydrobiologii

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2000

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tom 47

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nr 3-4

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Body size and the relative abundance of species

84%

Ulrich W.

Ecological Questions

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2008

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tom 10

Existing models of species abundance distributions (SADs) can be divided into those that are based on concepts of common limited niche space (niche apportionment models, neutral models) and those that invoke standard statistical distributions (e. g. log-series, lognormal). While the first type of models assumes that competitive interactions lead to observed SADs, the models of the second type appear to be mainly statistical descriptors of SADs without deeper biological meaning. None of the models explicitly includes species body size as a factor influencing species abundances. Further, with the exception of recent neutral models they are not embedded into basic ecological and evolutionary models to explain local diversity and ecosystem functioning. Here I present a new random walk model of species abundances that is based on two well known ecological distributions, the abundance - body weight distribution and the species - body weight distribution to define long-term upper abundance boundaries (carrying capacities). I show that a simple random walk of species abundances around the carrying capacities not only generates observed SADs but is also able to explain other patterns of community structure like core - satellite distributions, temporal patterns of species turnover, variance - mean ratios, and biomass distributions.

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Distribution pattern of epiphytic microcrustaceans in relation to different macrophyte microhabitats in a shallow wetland (Upo wetlands, South Korea)

84%

Choi J.-Y., Kim S.-K., Jeong K.-S., Joo G.-J.

Oceanological and Hydrobiological Studies

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2015

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tom 44

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nr 2

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Species composition of secondary invaders and accompanying insects on thinning brush wood in pine stands

84%

Korczynski I., Kuzminski R., Labedzki A., Mazur A., Szczepanska D.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2007

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tom 06

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nr 1

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Abundance Frequency of Plant Species as Animal Feeds to Determine Ideal Cattle Grazing

67%

Yulianto R., Xuan T. D., Kawamura K., Lim J., Yoshitoshi R., Xinyan F., Zhe G.

International Letters of Natural Sciences

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2016

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tom 58

The objectives of this study were to determine the dominant frequency of plant species, and provide useful information toward the conservation management of animal feed in grazing areas, Hiroshima, Japan. The numbers of plant species were 32 and 21 in spring and summer, respectively. The appearance frequency of plant species more than 50% in the spring, consist of Veronica arvensis (75.57%), Trifolium repens (73.86%), Paspalum dilatatum (69.32%), Lamium purpureum (68.75%), Trifolium dubium (65.34%), Cerastium glomeratum (63.64%), whereas in summer, it consists of Paspalum notatum (98.30%), Trifolium repens (81.25%), Paspalum dilatatum (78.98%), and Kyllinga brevifolia (74.43%). It was observed that the plant high of the plant species were 16.64 and 21.55 cm; vegetation cover rates were 77.18 and 81.36%; chlorophyll content were 41.72 and 36.28 mg/g Fw, and species numbers were 17.91 and 10.18, in spring and summer, respectively. Findings of this research propose that Trifolium repens (clover), Rumex japonicus (weed), and Paspalum dilatatum (grass) are dominant species in the studied areas that can be utilized as animal feeds.

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Ecological background of the floristic diversity in northern Asia

67%

Malyshev L. I.

Fragmenta Floristica et Geobotanica. Supplementum

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1993

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tom 02

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