Results 261 to 270 of about 1,139,197 (299)

Grazing by protozoa as selection factor for activated sludge bacteria

Microbial Ecology, 1979
In continuous culture enrichments that were inoculated with activated sludge and were fed with polymeric substrates, freely dispersed single-celled bacteria belonging to theCytophaga group dominated among the initial populations, irrespective of the activated sludge source.
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Modelling diet selection and intake for grazing herbivores

Ecological Modelling, 1991
Abstract This paper presents a mechanistic model which simulates diet selection and animal intake. It incorporates quantitative representations for preference, palatability and availability as they affect diet selection and intake by herbivores.
H.D. Blackburn, M.M. Kothmann
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Diurnal Variation in the Diet selected by Free-grazing Sheep

Nature, 1965
THE use of oesophageal fistulae has facilitated work on the diet selected by grazing ruminants. Three experiments at this laboratory with free-grazing sheep have shown marked diurnal changes in the nitrogen content of the diet selected by Merino wethers.
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Selection of Seedlings of Thymus Vulgaris by Grazing Slugs

The Journal of Ecology, 1983
Resultats d'experiences conduites pour tester l'effet de differents terpenes sur le predateur de la ...
Gouyon, Pierre-Henri, Fort, Philippe, Caraux, Gilles   +2 more
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Study on the Selective Grazing of Zooplankton in Plankton Ecosystem

Advanced Materials Research, 2013
Harmful algal blooms (Habs) caused great harm to the human environment. Habs occurrence was connected with other types of plankton. This relationship may be restrictive, and may also be promotional. Selectivity of zooplankton grazing has an important influence on the Habs.
Yan Lin Zheng, Zhuo Ying Lv
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Selective slug grazing on montane meadow plants

Journal of Ecology, 1999
Summary1 In order to test the hypothesis that the sensitivity of field populations of the rare perennialArnica montanato slug attack is due to its high palatability, we comparedArnicaleaves and seedlings with 20 other plant species in greenhouse food choice experiments.2 When slugs were given a choice of mature plant leaf discs,Arnica montanawas one of
Ulrich Scheidel, Helge Bruelheide
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Selection by grazing sheep of pasture plants at low herbage availability and responses of the plants to grazing

Australian Journal of Agricultural Research, 1986
Merino sheep grazing annual pasture at the beginning of the growing season when the amount of herbage on offer was small, preferred to graze Wimmera ryegrass Lolium rigidum or subterranean clover Trifolium subterraneum rather than capeweed Arctotheca calendula, and Erodium botrys was avoided completely.
DM Broom, GW Arnold
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Selective grazing, patch stability and vegetation dynamics in a rotationally-grazed pasture

2010
The lack of data on interactions between grazing intensity and livestock species makes it difficult to propose recommendations for the management of biodiversity and production in grassland ecosystems. A productive grassland area was therefore divided into 12 plots that were rotationally grazed by heifers at a high or a low stocking rate or by ewes at ...
Dumont, Bertrand, Carrère, Pascal, Rossignol, Nicolas, Chadoeuf, Joel, Farruggia, Anne, Ginane, Cécile, Louault, Frédérique   +6 more
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Grazing behaviour and diet selection of Barotse cattle on a communally grazed floodplain in west Zambia

African Journal of Range & Forage Science, 2001
Grazing behaviour and diet selection of cattle were studied on a communally grazed floodplain and its adjacent wooded uplands in western Zambia to identify the interaction between basic herd management practices, foraging behaviour and body condition of cattle.
Baars, RMT, Ottens, JJ
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Selective grazing of methanotrophs by protozoa in a rice field soil.

FEMS microbiology ecology, 2008
Biological methane oxidation is a key process in the methane cycle of wetland ecosystems. The methanotrophic biomass may be grazed by protozoa, thus linking the methane cycle to the soil microbial food web. In the present study, the edibility of different methanotrophs for soil protozoa was compared.
Murase, J., Frenzel, P.
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