نتایج جستجو برای: hemicryptophyte

تعداد نتایج: 16  

Journal: :محیط زیست طبیعی 0
نعمت اله خراسانی استاد دانشکده منابع طبیعی، دانشگاه تهران برهان ریاضی استادیاردانشکده محیط زیست و انر‍‍ژی، واحد علوم و تحقیقات تهران، دانشگاه آزاداسلامی عطا الله علی احیایی کارشناس ارشد زیستگاه ها و تنوع زیستی، واحد علوم و تحقیقات تهران، دانشگاه آزاد اسلامی

zarivar lake is the only natural water area and the ponds in the kurdistan province which is located 2 kilometers far from the northwest of marivan city and at an altitude of 1285 meters above sea level. the mean annual rainfall is 997.6 mm and the mean annual temperature is 13°c. this study is carried out to survey the biodiversity, identification and introduce plant species around the lake an...

2014
Oliver L. Pescott Gavin B. Stewart

Vegetation trampling resulting from recreation can adversely impact natural habitats, leading to the loss of vegetation and the degradation of plant communities. A considerable primary literature exists on this topic, therefore it is important to assess whether this accumulated evidence can be used to reach general conclusions concerning vegetation vulnerability to inform conservation managemen...

The study of  vegetation dynamics under grazed and non-grazed rangelands is one of the most important prerequisites for range improvement. In this research, vegetation composition and the vegetation functional groups were compared in an exclosure site (livestock excluded for six years) and grazed area in semi-steppe rangelands in Tehran province. Systematic random sampling technique through the...

Journal: :Sustainability 2022

The purpose of this study was to investigate the taxonomic diversity, richness, and distribution patterns Poaceae in relation abiotic factors Jhelum district Pakistan Himalayas. We used a random sampling technique from 80 grids within 240 sites with rich diversity wild grasses 720 quadrates triplets each site across between 2019 2021 collect data on grass species associated environmental condit...

Introduction: The natural ecosystems of Iran are the most important origins of speciation in the world and protecting this diversity is of great importance. Sumac species in Bideskan habitat is considered as one of the most important rangeland sub-products that in addition to regional economic prosperity, it provides sustainable employment for villagers and is considered as an important species...

ژورنال: مرتع 2022

Background and objectives: Riparian vegetation along the river is one of the most sustainable aboveground covers that is a good source of food for livestock. Considering the degraded riparian areas, studies on soil seed bank is important and, necessary for restoration goals. Methodology: The present study was conducted to investigate the soil seed bank in the riparian region of the Gamasiab ri...

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