نتایج جستجو برای: historical landscape

تعداد نتایج: 174233  

Journal: :JDCTA 2010
Rongzhi Liu Bei Hu

Practical Experience has shown that the agglomeration and successful rate of the entrepreneurial activity in the industrial clusters was much higher than non-industrial clusters, the aim of this paper is to contribute to a greater understanding of the process about how the industrial cluster promote the entrepreneurial activities functioning as the incubator of the entrepreneurs and enterprises...

2010
Samuel A. Cushman Jeffery Evans Kevin McGarigal

In the preceding chapters we discussed the central role that spatial and temporal variability play in ecological systems, the importance of addressing these explicitly within ecological analyses and the resulting need to carefully consider spatial and temporal scale and scaling. Landscape ecology is the science of linking patterns and processes across scale in both space and time. Thus landscap...

Journal: :Molecular ecology 2007
Silke Werth Felix Gugerli Rolf Holderegger Helene H Wagner Daniela Csencsics Christoph Scheidegger

Epiphytes are strongly affected by the population dynamics of their host trees. Owing to the spatio-temporal dynamics of host tree populations, substantial dispersal rates--corresponding to high levels of gene flow--are needed for populations to persist in a landscape. However, several epiphytic lichens have been suggested to be dispersal-limited, which leads to the expectation of low gene flow...

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