نتایج جستجو برای: rangeland and forest

تعداد نتایج: 16850726  

Journal: :Journal of Asia-Pacific Biodiversity 2021

This article provides an annotated catalog of the Symphypleona and Neelipleona (Hexapoda: Collembola) Iran based on published literature specimens recently collected from three different ecosystems in North Khorasan province (Forest, Rangeland, Agricultural) years 2018 2019. Thirty-five species seven families 17 genera are listed. Among them, Megalothorax minimus Bourletiella sp. recorded for f...

Journal: :journal of rangeland science 2013
tahereh sadeghi shahrakht mohammad jankju mansour mesdaghi

in arid and semi-arid ecosystems, shrubs may act as fertility islands but theireffect may vary depending on their morphology and ecological impacts. this research wasaimed to study effect of three shrubs scariola orientalis, astragalus heratensis, and rosapersica on soil properties and on the microclimate conditions (temperature, luminance, andsoil moisture) of their understory in the steppe ra...

Journal: :Animal : an international journal of animal bioscience 2010
M Jouven P Lapeyronie C-H Moulin F Bocquier

In the countries surrounding the Mediterranean basin, most of the semi-natural grazing lands are covered by rangelands. Rangelands can be defined as highly heterogeneous natural vegetation communities with high conservation value, growing in harsh environments (poor soils, unfavourable climatic conditions). In the recent socio-economic context, traditional livestock grazing practices that enabl...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Rob Alkemade Robin S Reid Maurits van den Berg Jan de Leeuw Michel Jeuken

Biodiversity in rangelands is decreasing, due to intense utilization for livestock production and conversion of rangeland into cropland; yet the outlook of rangeland biodiversity has not been considered in view of future global demand for food. Here we assess the impact of future livestock production on the global rangelands area and their biodiversity. First we formalized existing knowledge ab...

Journal: :caspian journal of environmental sciences 2012
a mahdavi

wildfire in forests and rangelands, apart from its initiating causes, is considered as an ecological disaster. zoning natural areas according to their susceptibility to fire helps to put off operations and reduces catastrophic losses caused through a wise management plan. in this study, the zoning map of wildfire risk in forest and rangeland areas has been produced using gis, analytical hierarc...

Zagros Mountains in west of Iran are covered by unique forests and rangelands. Increasing population, low level of development and high dependence of local people on natural resources for primary livelihood needs resulted in degradation of Zagros forests and rangelands. Along with these factors, since the last decade, climate change including severe drought is an important issue in the world, p...

2014
D. Richard Cameron Jaymee Marty Robert F. Holland

Land use change in rangeland ecosystems is pervasive throughout the western United States with widespread ecological, social and economic implications. In California, rangeland habitats have high biodiversity value, provide significant habitat connectivity and form the foundation for a number of ecosystem services. To comprehensively assess the conservation status of these habitats, we analyzed...

2010
John D. Waldron Robert N. Coulson David M. Cairns Charles W. Lafon Maria D. Tchakerian Weimin Xi Kier Klepzig Andrew Birt

The southern pine beetle, Dendroctonus frontalis (Zimmerman) (Coleoptera: Curculionidae: Scolytinae) (SPB), is an indigenous invasive species that infests and causes mortality to pines (Pinus spp.) throughout the Southern United States. The hemlock woolly adelgid, Adelges tsugae (Annand) (Homoptera: Adelgidae) (HWA), is a nonindigenous invasive species that infests and causes mortality to Easte...

2006
Elizabeth G. King Richard J. Hobbs

We present an ecological framework for considering ecosystem degradation and restoration, particularly in rangelands and arid environments. The framework is a synthesis of three conceptual models previously developed by several rangeland and restoration ecologists. We focus first on distinctions and connections between structural and functional components of rangeland ecosystems and then on dis...

2012
Gufu Oba

This article reports a rapid method for rangeland assessments in Kenya, Ethiopia and Uganda by harnessing pastoralists’ indigenous knowledge among the Orma, Afar and Karamojong pastoralists. The study developed and evaluated a methodological framework for conducting joint assessments with pastoralist range scouts. The framework has four components: selection of ecological and anthropogenic indi...

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