نتایج جستجو برای: climatic factors

تعداد نتایج: 1102923  

Journal: :Theoretical and Applied Climatology 2022

Vegetation dynamics are sensitive to climatic warming and affected by individual or combined factors at different temporal scales with intensities. Previous studies have unraveled the relationships between vegetation factors; however, it is unclear whether effects of single on dominant for scales, types, regions. The objective this study was explore scale-specific univariate multivariate contro...

2017
Junfang Zhao Feiyu Pu Yunpeng Li Jingwen Xu Ning Li Yi Zhang Jianping Guo Zhihua Pan

Understanding the regional relationships between climate change and crop production will benefit strategic decisions for future agricultural adaptation in China. In this study, the combined effects of climatic factors on spring wheat phenophase and grain yield over the past three decades in Inner Mongolia, China, were explored based on the daily climate variables from 1981-2014 and detailed obs...

2017
Lorenz Walthert Eliane Seraina Meier

Knowledge of the ecological requirements determining tree species distributions is a precondition for sustainable forest management. At present, the abiotic requirements and the relative importance of the different abiotic factors are still unclear for many temperate tree species. We therefore investigated the relative importance of climatic and edaphic factors for the abundance of 12 temperate...

2006
Suzanne Belliveau Barry Smit Ben Bradshaw

This paper assesses the vulnerability of grape growers and winery operators in the Okanagan Valley, British Columbia to climate variability and change, in the context of other sources of risk. Through interviews and focus groups, producers identified the climatic and non-climatic risks relevant to them and the strategies employed to manage these risks. The results show that the presence of mult...

Journal: :Journal of evolutionary biology 2013
T Honkola O Vesakoski K Korhonen J Lehtinen K Syrjänen N Wahlberg

Quantitative phylogenetic methods have been used to study the evolutionary relationships and divergence times of biological species, and recently, these have also been applied to linguistic data to elucidate the evolutionary history of language families. In biology, the factors driving macroevolutionary processes are assumed to be either mainly biotic (the Red Queen model) or mainly abiotic (th...

2015
Ning Zong Jing Jiang Peili Shi Minghua Song Zhenxi Shen Xianzhou Zhang

Quantifying the effects of nutrient additions on soil microbial respiration (R m) and its contribution to soil respiration (R s) are of great importance for accurate assessment ecosystem carbon (C) flux. Nitrogen (N) addition either alone (coded as LN and HN) or in combination with phosphorus (P) (coded as LN + P and HN + P) were manipulated in a semiarid alpine meadow on the Tibetan Plateau si...

Journal: :The American naturalist 2014
Florian C Boucher Wilfried Thuiller T Jonathan Davies Sébastien Lavergne

Recent debate on whether climatic niches are conserved through time has focused on how phylogenetic niche conservatism can be measured by deviations from a Brownian motion model of evolutionary change. However, there has been no evaluation of this methodological approach. In particular, the fact that climatic niches are usually obtained from distribution data and are thus heavily influenced by ...

Journal: :Evolution; international journal of organic evolution 2006
Kenneth H Kozak John J Wiens

Recent speciation research has generally focused on how lineages that originate in allopatry evolve intrinsic reproductive isolation, or how ecological divergence promotes nonallopatric speciation. However, the ecological basis of allopatric isolation, which underlies the most common geographic mode of speciation, remains poorly understood and largely unstudied. Here, we explore the ecological ...

2012
Gilles Cottrell Bienvenue Kouwaye Charlotte Pierrat Agnès le Port Aziz Bouraïma Noël Fonton Mahouton Norbert Hounkonnou Achille Massougbodji Vincent Corbel André Garcia

Malaria remains endemic in tropical areas, especially in Africa. For the evaluation of new tools and to further our understanding of host-parasite interactions, knowing the environmental risk of transmission--even at a very local scale--is essential. The aim of this study was to assess how malaria transmission is influenced and can be predicted by local climatic and environmental factors.As the...

2015
Lina Zhao Tao Pei Gege Yang Chenghu Zhou Yongfeng Zhou

Climate is one of the most important factors determining the adaptive evolution of plants. In this study, 44 different populations of wild barley were used as materials to analyze the diversity of 17 genes (495 sequences), in order to study the influence of different climatic conditions on adaptive evolution of wild barley. A Geographical Information System (GIS) provided tools to visually pres...

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