نتایج جستجو برای: burned rangelands diversity

تعداد نتایج: 196275  

Journal: :ecopersia 2015
davoud akhzari mohammad pessarakli farnaz mahmoodi behnoush farokhzadeh

livestock grazing and rangelands fire are important ecological disturbances influencing the vegetation and soil properties in rangelands ecosystem. this study was conducted to determine the effects of different burned treatments and distances from the water sources on some soil and vegetation properties of rangelands ecosystem. the experiment was conducted in lashgar dar rangelands. vegetation ...

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...

2007
William J. Elliot Peter R. Robichaud I. Sue Miller

Abstract. In both forest and rangelands, fuel reduction operations are now common practices. Mechanical thinning followed by prescribed fire is common in forests, while fire is frequently applied to rangelands. Studies at different scales (50 sq m to 389 ha) measure the erosion from fuel management. This presentation compares runoff and erosion from these studies. Plot size has the greatest inf...

2011
Andrew T. Hudak Ian Rickert Penelope Morgan Eva Strand Sarah A. Lewis Pete Robichaud Zachary A. Holden Peter R. Robichaud Chad Hoffman

This report provides managers with the current state of knowledge regarding the effectiveness of fuel treatments for mitigating severe wildfire effects. A literature review examines the effectiveness of fuel treatments that had been previously applied and were subsequently burned through by wildfire in forests and rangelands. A case study focuses on WUI fuel treatments that were burned in the 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...

2013
Ioannis Bistinas Duarte Oom Ana C. L. Sá Sandy P. Harrison I. Colin Prentice José M. C. Pereira

We explore the large spatial variation in the relationship between population density and burned area, using continental-scale Geographically Weighted Regression (GWR) based on 13 years of satellite-derived burned area maps from the global fire emissions database (GFED) and the human population density from the gridded population of the world (GPW 2005). Significant relationships are observed o...

حیدری, مهدی , فرامرزی, مرزبان ,

In most ecosystems, disturbance is an important agent of variation in community structure and composition. Determining the diversity and composition of soil seed bank is essential for designing conservation and restoration programs because it can markedly contribute to future plant communities. Despite the important role of soil seed banks in the composition of different plant communities, and...

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...

2008
M. D. MacNeil

Rangelands are complex systems that occupymore than 50% of the land area in theworld. Carbon cycling on rangelands is generally understood, but details concerning agricultural management practices of prescribed fire and grazing are not well defined. Field experiments were conducted on northern mixedgrass prairie in eastern Montana with undisturbed, burned, and grazed treatments established in 2...

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