نتایج جستجو برای: steppe rangelands directing plant community composition

تعداد نتایج: 984528  

Pejman tahmasebi Kohyani, Yousef askari

Semi-steppe rangelands are a complex, highly dynamic and often multi-layered mosaic of grassland, shrubland, and intermediate communities. A few recent studies have explicitly or implicitly developed synthetic hypotheses about how interactive effects of human made disturbances initiate dynamic changes in plant community composition to cause a shifting mosaic of vegetation pattern across the lan...

Pejman tahmasebi Kohyani, Yousef askari

Semi-steppe rangelands are a complex, highly dynamic and often multi-layered mosaic of grassland, shrubland, and intermediate communities. A few recent studies have explicitly or implicitly developed synthetic hypotheses about how interactive effects of human made disturbances initiate dynamic changes in plant community composition to cause a shifting mosaic of vegetation pattern across the lan...

Journal: :مرتع و آبخیزداری 0
پژمان طهماسبی استادیار گروه مرتع و آبخیزداری دانشکدة منابع طبیعی و علوم زمین دانشگاه شهرکرد

fire is one of the most important ecological factors in semi-steppe rangelands directing plant community composition, diversity, structure and function of ecosystems. our primary aim was to examine the effect of fire on plant community composition, diversity, plant species restoration and animal selectivity in semi-steppe rangeland in karsanak region, chaharmahal & bakhtiari province in years 2...

Journal: :international journal of advanced biological and biomedical research 0
pejman tahmasebi kohyani assistant professor,department of range and watershed mangement,faculty of natural resource and earth science, shahrekord university, po. box 115, shahrekord, iran yousef askari ph.d student of forestry, faculty of natural resources and earth science, university of shahrekord, shahrekord, iran

semi-steppe rangelands are a complex, highly dynamic and often multi-layered mosaic of grassland, shrubland, and intermediate communities. a few recent studies have explicitly or implicitly developed synthetic hypotheses about how interactive effects of human made disturbances initiate dynamic changes in plant community composition to cause a shifting mosaic of vegetation pattern across the lan...

2015
Tao Zhang Rui Guo Song Gao Jixun Guo Wei Sun

Climate change has profound influences on plant community composition and ecosystem functions. However, its effects on plant community composition and biomass production are not well understood. A four-year field experiment was conducted to examine the effects of warming, nitrogen (N) addition, and their interactions on plant community composition and biomass production in a temperate meadow ec...

Variation along the successional stage of a plant community is not limited to plant composition and diversity but also related to nutrient resources and plant species abundance distribution. Therefore, the use of models that consider the distribution of ecological niches in addition to the relative frequency of species in the distribution of species is also important. The object of current stud...

2015
Kiyokazu Kawada Wuyunna Borjigin Toru Nakamura Mai-He Li

The purpose of our investigation was to clarify the effects of agriculture on the process of loss of litter at the periphery of a farmland. This study revealed the generation process of an ecologically unusual phenomenon that is observed around cropland in semi-arid regions. We hypothesized that the vegetation around a farmland cannot supply plant litter to the ground surface because the ecolog...

Journal: :Annals of the New York Academy of Sciences 2010
Xiao-Xuan Zheng Guo-Hua Liu Bo-Jie Fu Tian-Tian Jin Zhan-Feng Liu

Many recent studies have focused on the relationship between biodiversity and ecosystem functioning, such as investigations into the productivity of experimental plant communities. One of the central issues affecting the functioning of ecosystems is the diversity of resident species richness and the composition of the plant community. However, one challenge to experimental studies is that resul...

2014
Ximei Zhang Albert Barberán Xunzhi Zhu Guangming Zhang Xingguo Han

Many investigations across natural and artificial plant diversity gradients have reported that both soil physicochemical factors and plant community composition affect soil microbial communities. To test the effect of plant diversity loss on soil bacterial communities, we conducted a five-year plant functional group removal experiment in a steppe ecosystem in Inner Mongolia (China). We found th...

2010
Kirk W. Davies Jonathan D. Bates Tony J. Svejcar Chad S. Boyd

Livestock grazing potentially has substantial influence on fuel characteristics in rangelands around the globe. However, information quantifying the impacts of grazing on rangeland fuel characteristics is limited, and the effects of grazing on fuels are important because fuel characteristics are one of the primary factors determining risk, severity, continuity, and size of wildfires. We investi...

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