نتایج جستجو برای: physiographic characteristics

تعداد نتایج: 661001  

Journal: :محیط زیست طبیعی 0
حامد آقاجانی دانشجوی کارشناسی ارشد جنگل شناسی و اکولوژی جنگل، دانشکدۀ منابع طبیعی، دانشگاه تهران محمدرضا مروی مهاجر استاد گروه جنگلداری و اقتصاد جنگل، دانشکدۀ منابع طبیعی، دانشگاه تهران محمدرضا آصف استادیار گروه رستنی ها، مؤسسۀ تحقیقات گیاه پزشکی ایران، تهران انوشیروان شیروانی استادیار گروه جنگلداری و اقتصاد جنگل، دانشکدۀ منابع طبیعی، دانشگاه تهران

fungi include a large group of organisms that are found in different ecological conditions and are important components in forest ecosystems. the northern forests of iran are mountainous mixed forests, and have high biological diversity. the aim of this research was asses influence of physiographic factors on abundance and diversity of wood macrofungi. after of primary field inspection fungi sa...

2015
Vinay Chandwani Sunil Kumar Vyas Vinay Agrawal Gunwant Sharma

Enormous cost and manpower utilization encountered in constructing a water resource project demands a great deal of attention in devising precise Rainfall-Runoff models for its successful performance. These models are dependent on the physiographic, climatic and biotic characteristics of the basin. These factors sometimes induce either a linear, non-linear or highly complex behaviour among the ...

2017
Tyler Harms Stephen J. Dinsmore

A decrease in wetland habitats throughout North America has caused a decline in populations of marsh birds. The objective of this study was to estimate population densities and abundances of secretive marsh birds in Iowa. Call-broadcast surveys were conducted in conjunction with distance sampling for eight species of marsh birds at wetlands in three regions of Iowa during 2009 and 2010. Regions...

2014
Salvador Lyngdoh Shivam Shrotriya Surendra P. Goyal Hayley Clements Matthew W. Hayward Bilal Habib

The endangered snow leopard is a large felid that is distributed over 1.83 million km(2) globally. Throughout its range it relies on a limited number of prey species in some of the most inhospitable landscapes on the planet where high rates of human persecution exist for both predator and prey. We reviewed 14 published and 11 unpublished studies pertaining to snow leopard diet throughout its ra...

2011
Finto Antony Laurence R. Schimleck Alexander Clark Richard F. Daniels

Early age competition control has been reported to significantly improve the growth and yield of plantation grown loblolly pine. The objective of this paper is to understand the changes in wood properties: basal area weighted whole disk SG, earlywood SG (EWSG), latewood SG (LWSG) and latewood percent (LWP) of 14 year-old trees which received early age herbaceous and hardwood competition control...

Journal: :Jurnal Tanah dan Sumberdaya Lahan 2021

The research that was conducted from April to December 2020 in the Supiturung Micro-Watershed, located on western slope of Mount Kelud, Kediri aimed study morphological characteristics and soil classification using a topo-sequence approach. Four pedons were observed across physiographic positions (upper, middle lower slopes) dry-land farming land use. method used this included 8 stages, namely ...

Rhamnus pallasii is one of important and valuable species in Khalkhal forest area.This study aimed to determine the relationship between vegetation properties of Rhamnus pallasii with soil and physiographic factors in this forest reserve. For this purpose, from 1030 to 2540 m.a.s.l, 48 sample plots of circular shape with an area of 500 m2, in three land forms (ridge, valley and slope) in four a...

In this study, all the papers about oak decline phenomena in forests of Iran have been reviewed. One hundred and twelve papers from 51 journals were reviewed, and the information presented in each paper was analyzed and finally summarized. Eighty seven percent of the papers were about Brant’s oak (Quercus brantii Lindl.). Most of the studies were focused on the pest and desease of oak decline. ...

The semi-parasitic European yellow mistletoe (Loranthus europaeus Jacq.) is one of the harmful and damaging factors to the Zagros forests. This study to analyze the causes of infected trees by European yellow mistletoe was conducted in the Ghalajeh forests in Kermanshah province. To carry out this study, completely infected trees were examined by using the tree-to-tree sampling method. Required...

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