Results 121 to 130 of about 26,564 (171)

Wintering Birds in Northern Saudi Arabia: February 2009 [PDF]

, 2011
The northern plains of Saudi Arabia are an area of approximately 231,000 km2, or roughly equivalent to the size of the whole of the United Kingdom. During previous ABBA Surveys in this area in late winter and spring significant numbers of wintering ...
Abu Qabous, Baleegh, Al Salamah, Mohammed I., al Subaie, Hajed N, Jennings, Michael C.   +3 more
core  

A PROPOSED METHODOLOGY FOR ESTIMATING ECOREGIONAL VALUES FOR OUTDOOR RECREATION IN THE UNITED STATES [PDF]

This paper provides a methodology for the estimation of recreational demand functions and values using an ecoregional approach. Ten ecoregions in the continental US were defined based on similarly functioning ecosystem characters.
Bergstrom, John C., Bhat, Gajanan, Bowker, James Michael, Cordell, H. Ken   +3 more
core   +1 more source

Reseeding Native Species Promotes Community Stability by Improving Species Diversity, Niche, and Interspecific Relationships in the Desert Steppe of Northwest China

Ecology and Evolution
The mechanism of community stability is a hot topic in the field of ecology. Research on the stability of the grassland community has gradually increased, and the reseeding of native species is one of the main measures to restore the degraded desert ...
Haixin Jiang, Yao Zhou, Wen Li, Qi Lu, Dongmei Xu, Hongbin Ma, Xingzhong Ma, Xiaowu Tian   +7 more
doaj   +1 more source

Mid-Holocene and glacial-maximum vegetation geography of the northern continents and Africa [PDF]

, 2000
Andreev, Andrei, Jolly, D., Prentice, I. C.   +2 more
core   +1 more source

Effects of Relative Precipitation Changes on Soil Microbial Community Structure in Two Alpine Grassland Ecosystems

Agronomy
Precipitation variability profoundly influences soil microbial diversity, community assembly processes, and co-occurrence networks. However, the responses of soil microbial structure to relative precipitation changes in alpine regions remain uncertain ...
Jianyu Xiao, Zhishu Wang, Fusong Han, Shaolin Huang, Chengqun Yu, Gang Fu   +5 more
doaj   +1 more source

Climatically driven loss of calcium in steppe soil as a sink for atmospheric carbon [PDF]

, 2008
During the last several thousand years the semi‐arid, cold climate of the Russian steppe formed highly fertile soils rich in organic carbon and calcium (classified as Chernozems in the Russian system).
Aparin, B. F., Bailey, S. W., Calef, M., Lapenis, A. G., Lawrence, G. B., Shiklomanov, Alexander I., Speranskaya, N. A., Torn, M. S.   +7 more
core   +1 more source

A Contribution to the Empirics of Welfare Growth [PDF]

This paper compares the determinants of economic growth and welfare growth. Our main result is that determinants may differ or have different impact on welfare outcomes as compared to economic outcomes.
Konstantinos Vrachimis, Marios Zachariadis   +1 more
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Analysis of extreme precipitation variation characteristics in mountain grasslands of arid and semi-arid regions in China

Frontiers in Environmental Science
Introduction: With global warming, the disaster losses caused by extreme precipitation events are increasing. The poor natural conditions and climate change make the arid and semi-arid mountainous grassland area a sensitive region of climate change.
Wei Li, Wei Li, Jing Guan, Wenjun Wang, Wenjun Wang, Yingjie Wu, Yingjie Wu, Yawen Zhao, Weijie Zhang, Weijie Zhang, Sinan Wang, Sinan Wang, Zexun Chen, Zexun Chen   +13 more
doaj   +1 more source

Sheep and goat organic meat production in the mediterranean region [PDF]

, 2001
All animal livestock of the South Mediterranean Countries suffer from climatic condition of mild region characterised by moist winter and hot dry summer.
Znaïdi, Akram
core  

The Relationships between Plant Community Stability and Diversity across Different Grassland Types and Their Association with Environmental Factors in the Habahe Forest Area, Xinjiang

Diversity
Plant community stability and diversity play crucial roles in maintaining the stable performance of grassland ecosystem functions. In this study, we selected 55 representative grassland community sample plots in the Habahe Forest region of the Altai ...
Guoyan Zeng, Mao Ye, Miaomiao Li, Weilong Chen, Qingzhi He, Xiaoting Pan, Xi Zhang, Jing Che, Jiaorong Qian, Yexin Lv   +9 more
doaj   +1 more source