نتایج جستجو برای: mixed grazing

تعداد نتایج: 235104  

2011
Nianpeng He Xingguo Han Guirui Yu Quansheng Chen

An understanding of the factors controlling plant community composition will allow improved prediction of the responses of plant communities to natural and anthropogenic environmental change. Using monitoring data from 1980 to 2009, we quantified the changes in community composition in Leymus chinensis and Stipa grandis dominated grasslands in Inner Mongolia under long-term grazing-exclusion an...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2007
Tara G Martin S McIntyre

We investigated the impact of pastoral management on birds in subtropical grassy eucalypt woodland in southeastern Queensland, Australia, where the patterns of land management have made it possible to disentangle the effects of livestock grazing from those of tree clearing. We recorded changes in bird species composition, density, and relative abundance across two woodland habitat types (ripari...

Journal: :Ecological applications : a publication of the Ecological Society of America 2016
David J Eldridge Alistair G B Poore Marta Ruiz-Colmenero Mike Letnic Santiago Soliveres

Reports of positive or neutral effects of grazing on plant species richness have prompted calls for livestock grazing to be used as a tool for managing land for conservation. Grazing effects, however, are likely to vary among different response variables, types, and intensity of grazing, and across abiotic conditions. We aimed to examine how grazing affects ecosystem structure, function, and co...

2011
Caterina Contini

1. Wetlands as Grazing Grounds 1.1. Wetlands and Traditional Seasonal Grazing: La Puna, Argentina–Bolivia–Chile– Peru 2. Grazing in Wetlands: Should this Threat be Prohibited? 2.1. Maintaining Biodiversity through Semi-Extensive Grazing: Palo Verde National Park, Costa Rica 3. Integrated Grazing Management in Wetlands: New Approaches 3.1. Combining Biodiversity Conservation with Livestock Reari...

2010
Lisette Lenoir Tommy Lennartsson

Arthropod communities were investigated in two Swedish semi-natural grasslands, each subject to two types of grazing regime: conventional grazing from May to September (continuous grazing) and traditional late management from mid-July (late grazing). Pitfall traps were used to investigate abundance of carabids, spiders, and ants over the grazing season. Ant abundance was also measured by mappin...

Journal: :Intermountain journal of sciences : IJS 2011
Abigail J Leary Amy J Kuenzi Richard J Douglass

We examined the effects of grazing on deer mouse (Peromyscus maniculatus) movements into buildings using passive integrated transponder (PIT) technology and small simulated buildings located on 0.6-ha treatment (grazing) and control (no grazing) plots. Twelve experimental 9-day trials were conducted over the course of the study. During these trials, mouse movements into buildings were monitored...

Journal: :مرتع و آبخیزداری 0
احمد صادقی پور استادیار دانشکدة کویرشناسی، دانشگاه سمنان نادیا کمالی دانشجوی دکتری مرتع داری، دانشگاه تهران پریا کمالی دانشجوی دکتری مرتع داری، دانشگاه علوم کشاورزی و منابع طبیعی گرگان حامد جنیدی دانشجوی دکتری مرتع داری، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

this study investigates monthly and seasonal variations of carbon emission from the soil at different grazing intensities. three areas of exclosure, low and high grazing intensities were selected in ghoosheh region of semnan province. carbon emission was measured monthly, in each treatment applying alkali traps (csc) during a year. emission and grazing data were analyzed, using a factorial expe...

2007
Hiroaki Saito

During the Subarctic Pacific Iron Experiment for the Ecosystem Dynamics Study (SEEDS), chlorophyll a concentration in the iron patch reached near maximum in 9 days (D9) after the iron fertilization and after that remained more or less constant. In spite of the stability of chlorophyll a, primary production was higher than 1.4–2.0 g C m d during D9–D13. As most of the carbon synthesized by phyto...

Journal: :مجله مرتعداری 0

the effects of different grazing intensities on the above and underground biomass of twospecies festucaovina l. and alopecurustextilisboiss. in the north sabalan rangelands (in shabil) were investigated. sampling on the light, medium and heavy grazing intensities in the flowering stage (the second half of june 2013) were performed. initially, from a 90-meter transects perpendicular to the slope...

2013
Liang Yan Guangsheng Zhou Feng Zhang

BACKGROUND Grazing is one of the main grassland disturbances in China, and it is essential to quantitatively evaluate the effects of different grazing intensities on grassland production for grassland carbon budget and sustainable use. METHODS A meta-analysis was conducted to reveal general response patterns of grassland production to grazing in China. We used weighted log response ratio to a...

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