نتایج جستجو برای: ecological groups

تعداد نتایج: 822297  

2016
Zhizhong Wang Liqun Wang Jinyun Jing Chunping Hu

BACKGROUND Ecological migrants has a special background compared with other types of migrant. However, the mental health status of ecological migrants who were expected to benefit from a massive "ecological migration project" initiated by the Chinese government is unknown. This study aims to explore the influence of environmental change on individuals' mental health and to improve current under...

Journal: :international journal of environmental research 2009
a. tavili m. jafari

distribution and abundance of plants has been correlated with a variety of complex environmental gradients. environmental factors affect plants growth and need to be understood by ecosystem managers. this study was carried out to examine the relationships between site factors and different vascular and non-vascular plants in north of iran. for this purpose, vegetation and soil sampling was perf...

2016
Joel R. Brown

• The Land Resource Hierarchy is a useful framework for organizing natural resource information and can provide both insight and explanation while maintaining consistency in terminology, concepts, and interpretations across scales is a challenge. • While some scales of the Land Resource Hierarchy are well developed, with all land area assigned to quantitatively defined groups, other scales lack...

2015
Kyle J. Broadway Mark Pyron James R. Gammon Brent A. Murry

As the intensity and speed of environmental change increase at both local and global scales it is imperative that we gain a better understanding of the ecological implications of community shifts. While there has been substantial progress toward understanding the drivers and subsequent responses of community change (e.g. lake trophic state), the ecological impacts of food web changes are far le...

2017
A A Makhrov

The problem of how a gradual development of ecological and morphological adaptations combines with large genome rearrangements, which have been found to occur in the phylogeny of many groups of organisms, is a matter of discussion in the literature. The objective of this work was to study the problem with the example of salmonids, whose evolution included at least six events of multiple chromos...

2010
Peter H. MCCARTNEY Matthew B. JONES

Metadata provide information on the structure and meaning of data. It is one of the most basic components for building a scalable, networked infrastructure for accessing ecological data. Several partnering groups from ecology have collaborated to define a standardized format for metadata that is machine-parseable and extensible. This has enabled new projects focusing on the development of tools...

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