نتایج جستجو برای: plants cover composition

تعداد نتایج: 551987  

Journal: :مرتع و آبخیزداری 0
ولی الله رئوفی راد دانشجوی کارشناسی ارشد مرتعداری دانشگاه شهرکرد عطاالله ابراهیمی استادیار دانشکدة کشاورزی دانشگاه شهرکرد حسین ارزانی استاد دانشکدة منابع طبیعی دانشگاه تهران زهرا شجاعی اسعدیه استادیار دانشکدة کشاورزی دانشگاه شهرکرد

palatability includes plants physical and chemical property that encourages an animal selecta plant for grazing. this study is an attempt for intruducing an indicator for determining thepalatability of rangeland plants. to do this, the relationship between palatability and foragequality of rangeland plants in karsanak rangelands of the chaharmahal-va-bakhtiari provincewas studied. first, plant ...

ژورنال: مرتع 2022
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Extended Abstract Background and objectives:  In order to further protect rangeland ecosystems, range suitability in this regard should be investigated before the utilization of medicinal and industrial plants. Plant composition and production and slope of the slope are among the components that determine the suitability of rangeland for the use of medicinal plants. For this purpose, in four ...

2013
Gbadamassi G. O. Dossa Ekananda Paudel Junichi Fujinuma Haiying Yu Wanlop Chutipong Yuan Zhang Sherryl Paz Rhett D. Harrison

Tropical volcanoes are an important but understudied ecosystem, and the relationships between plant species diversity and compositional change and elevation may differ from mountains created by uplift, because of their younger and more homogeneous soils. We sampled vegetation over an altitudinal gradient on Mt. Rinjani, Lombok, Indonesia. We modeled alpha- (plot) and beta- (among plot) diversit...

Journal: :journal of rangeland science 2013
esmaeil sheidai karkaj javad motamedi mousa akbarlou ahmad alijanpour

recognition of habitats and conditions of species presences in differentsituations can be effective in proper utilization of vegetation. little is known about thevegetation composition of boralan mountain region located in north west of iran in theborder of turkey and azerbaijan with the altitude range of 800-2000m. the aim of thisstudy therefore was to investigate the floristic composition qua...

Journal: :مرتع و آبخیزداری 0
مریم آذرخشی استادیار دانشگاه تربت‏ حیدریه، دانشکدة کشاورزی و منابع طبیعی، ایران محمد مهدوی استاد دانشگاه تهران، دانشکدة منابع طبیعی، ایران حسن احمدی استاد دانشگاه تهران، دانشکدة منابع طبیعی، ایران حسین ارزانی استاد دانشگاه تهران، دانشکدة منابع طبیعی، ایران جلیل فرزادمهر استادیار دانشگاه تربت‏ حیدریه، دانشکدة کشاورزی و منابع طبیعی، ایران

plants cover composition, condition, trend, production, and grazing capacity of the rangeland change annually. in this research, the role of temporal rainfall distribution on rangeland production was assessed. this research had down in the rangelands of ilam (with semiarid to semi humid climate) and qom and markazi (with arid to semiarid climate) provinces. by attention on plant cover maps in e...

ژورنال: علوم آب و خاک 2002
علیرضا امینی حاجی‌ آبادی, , جمال ‌الدین خواجه دین, , سیدعلی میرمحمدی میبدی, ,

A number of halophytic species as Salicornia europea, Halocnemum strobilaceum, Aeluropus lagopoides, and Aeluropus littoralis were found to occupy a significant portion of the total vegetation of the surrounding area at the Zayande-Roud inlet to Gavkhoony wetland. However, their ecological demands and bioenvironmental factors by which vegetation community composition has been affected is not un...

The aim of this study was to investigate the role of species of Trifolium genus on the composition, diversity, forage value and quantitative vegetation parameters and interaction between Trifolium species and invasive species Leucanthemum vulgare Lam. in Fandoghlou rangelands in Ardabil province. In determining the sampling locations, six sites by systematic random method and due to the distrib...

2017
Victoria Nuzzo Andrea Dávalos Bernd Blossey

Excessive herbivory can have transformative effects on forest understory vegetation, converting diverse communities into depauperate ones, often with increased abundance of non-native plants. White-tailed deer are a problematic herbivore throughout much of eastern North America and alter forest understory community structure. Reducing (by culling) or eliminating (by fencing) deer herbivory is e...

2018
Kristine M Averill David A Mortensen Erica A H Smithwick Susan Kalisz William J McShea Norman A Bourg John D Parker Alejandro A Royo Marc D Abrams David K Apsley Bernd Blossey Douglas H Boucher Kai L Caraher Antonio DiTommaso Sarah E Johnson Robert Masson Victoria A Nuzzo

Herbivores can profoundly influence plant species assembly, including plant invasion, and resulting community composition. Population increases of native herbivores, e.g. white-tailed deer (Odocoileus virginianus), combined with burgeoning plant invasions raise concerns for native plant diversity and forest regeneration. While individual researchers typically test for the impact of deer on plan...

علیرضا امینی حاجی‌ آبادی, , جمال ‌الدین خواجه دین, , سیدعلی میرمحمدی میبدی, ,

A number of halophytic species as Salicornia europea, Halocnemum strobilaceum, Aeluropus lagopoides, and Aeluropus littoralis were found to occupy a significant portion of the total vegetation of the surrounding area at the Zayande-Roud inlet to Gavkhoony wetland. However, their ecological demands and bioenvironmental factors by which vegetation community composition has been affected is not un...

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