نتایج جستجو برای: steppe

تعداد نتایج: 4241  

2015
Guoqing Li Zhongming Wen Ke Guo Sune Linder Eric J. Jokela

A risk assessment of vegetation zone responses to climate change was conducted using the classical Holdridge life zone model on the Loess Plateau of Northwest China. The results show that there are currently ten vegetation zones occurring on the Loess Plateau (1950–2000), including alvar desert, alpine wet tundra, alpine rain tundra, boreal moist forest, boreal wet forest, cool temperate desert...

2016
Junfu Dong Xiaoyong Cui Shuping Wang Fang Wang Zhe Pang Ning Xu Guoqiang Zhao Shiping Wang

In the alpine steppe zone on the Central Tibetan Plateau, a large amount of area has been degraded due to natural and artificial factors. N & P fertilization is widely accepted to recover degraded pastures in other regions all over the world. However, it is not clear how alpine steppe communities respond to N & P fertilization, and what is the optimal application rate, in the perspective of for...

2006
X. Zhan L. Li W. Cheng

The landscapes of Inner Mongolia are widely known for the vast Stipa krylovii steppes. However, overgrazing and other improper land uses have extensively degraded the Stipa krylovii steppe ecosystem in recent decades. Knowledge about the soil seed banks and the remaining vegetation in these damaged ecosystems is crucial for guiding the restoration efforts. Using a germination method, this study...

2017
Wolfgang Willner Anna Kuzemko Jürgen Dengler Milan Chytrý Norbert Bauer Thomas Becker Claudia Biţă-Nicolae Zoltán Botta-Dukát Andraž Čarni János Csiky Ruzica Igić Zygmunt Kącki Iryna Korotchenko Matthias Kropf Mirjana Krstivojević-Ćuk Daniel Krstonošić Tamás Rédei Eszter Ruprecht Luise Schratt-Ehrendorfer Yuri Semenishchenkov Zvjezdana Stančić Yulia Vashenyak Denys Vynokurov Monika Janišová

QUESTIONS What are the main floristic patterns in the Pannonian and western Pontic steppe grasslands? What are the diagnostic species of the major subdivisions of the class Festuco-Brometea (temperate Euro-Siberian dry and semi-dry grasslands)? LOCATION Carpathian Basin (E Austria, SE Czech Republic, Slovakia, Hungary, Romania, Slovenia, N Croatia and N Serbia), Ukraine, S Poland and the Brya...

Journal: :آب و خاک 0
جلال حیدری شجاع قربانی دشتکی فایز رئیسی پژمان طهماسبی

annual fires might change many soil physical properties in semi steppe rangeland.the objective of this study was to investigate the impact of fire on soil physical properties and soil water infiltration parameters in semi-steppe rangeland of karsanak region in chaharmahal and bakhtiari province. therefore, several sites were chosen which were affected by fire at three, two and one years prior t...

Journal: :Remote Sensing 2017
Sheng Chang Bingfang Wu Nana Yan Bulgan Davdai Elbegjargal Nasanbat

In Mongolia, drought is a major natural disaster that can influence and devastate large regions, reduce livestock production, cause economic damage, and accelerate desertification in association with destructive human activities. The objective of this article is to determine the optimal satellite-derived drought indices for accurate and real-time expression of grassland drought in Mongolia. Fir...

2010
Jinwei Dong Fulu Tao Geli Zhang

Extensive studies have investigated the relationships between climate change and vegetation dynamics. However, the geographic controls on vegetation dynamics are rarely studied. In this study, the geographic controls on the trends and variation of vegetation greenness in middle and eastern Inner Mongolia, China (mid-eastern Inner Mongolia) were investigated. The SPOT VEGETATION 10-day period sy...

Journal: :international journal of advanced biological and biomedical research 2013
m.r. hemami s.s. mohaghegh a. rohina s. sobhani ardakani

since density is considered as one of the most important numerical indices to explain quantitative values of a plant community by affecting on many aspects and activity of ecosystem, on the other hand, awareness about plants distribution pattern in environment is an essential preparation for measurement and study of vegetative cover, therefore, in this research determination of density and dist...

2016
Naomi F. Miller

Review of D. de Moulins, 1997. Agricultural Changes at Euphrates and Steppe Sites in the Mid-8th to the 6th

2017
Jonathan D. Bates Kirk W. Davies

Conifer control in sagebrush steppe of the western United States causes various levels of site disturbance influencing vegetation recovery and resource availability. The data set presented in this article include growing season availability of soil micronutrients and levels of total soil carbon, organic matter, and N spanning a six year period following western juniper (Juniperus occidentalis s...

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