نتایج جستجو برای: spatial diversity

تعداد نتایج: 539877  

ژورنال: مدیریت شهری 2016
Daryabari, Seyed Jamaledin, Salari, Mohammad,

Power as an institution, governance as structure and spatial organization is considered as an organizational tool in the service of the goals and aspirations of the institutions of power and governance structure. In this framework the spatial organization and geographic environment is a result of social organization (social, economic, political), and its natural and ecological system. Human aut...

A.J. G van Gastel P.C. Struik Z. Bishaw,

"> The present study described the diversity of wheat and barley varieties andlandraces available in farmer’s fields in Syria using different indicators. Analysisof spatial and temporal diversity and coefficient of parentage along withmeasurements of agronomic and morphological traits were employed to explain thediversity of wheat and barley varieties or landraces grown by farmers in Syria.Farm...

2013
Roman N. Zajac Joseph M. Vozarik Brittney R. Gibbons

We examined temporal changes in macrofaunal α- and β-diversity over several spatial scales (within patches, among patches, across landscapes and across regions) in Long Island Sound on the northeast USA coast. Regional ε-diversity was estimated at 144 taxa, however γ-diversity fluctuated over time as did α- and β-diversity components. Based on additive partitioning, patch- and region-scale β-di...

2015
Erika C. Brandt John E. Petersen Jake J. Grossman George A. Allen David H. Benzing Jian Liu

The diversity of plant species and their distribution in space are both thought to have important effects on the function of wetland ecosystems. However, knowledge of the relationships between plant species and spatial diversity remains incomplete. In this study, we investigated relationships between spatial pattern and plant species diversity over a five year period following the initial resto...

2018
Xing Wang Xinguo Yang Lei Wang Lin Chen Naiping Song Junlong Gu Yi Xue

Excluding grazers is one of most efficient ways to restore degraded grasslands in desert-steppe communities, but may negatively affect the recovery of plant species diversity. However, diversity differences between grazed and fenced grasslands in desert-steppe are poorly known. In a Stipa breviflora desert steppe community in Northern China, we established six plots to examine spatial patterns ...

2005
Akira Utsumi

In this paper, we argue that the metaphor form of a comparison (i.e., a topic-vehicle pair) is preferred over, and more comprehensible than, the simile form when the interpretive diversity for that comparison is high. Interpretive diversity refers to the richness of the figurative meaning of a comparison; it is high to the extent that more features or properties are related to the figurative me...

Biodiversity is one of the important aspects of natursal systems which supports ecosystem functions. Therefore, the preservation of biodiversity is necessary for human well-being. The curreny study aimed to investigate changes of alpha and beta diversity and its components along the elevation gradient of five classes and to evaluate the effects of physical and chemical characteristics of soil o...

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