Jiuquan City is a typical ecologically fragile area in the arid areas of Northwest China, and unreasonable human activities directly affect regional ecological security. Scientifically, it necessary to construct an landscape pattern on basis security evaluation. This paper selected evaluation factors based perspective “environmental base interference”, used spatial principal component analysis ...

the ecological footprint as an indicator estimates the effect of population and industrial products process on ecosystem by evaluating and calculating the used energy and materials in a city, region or country. dehgolan county is located in kurdistan province between hamadan and sanandaj cities. dehgolan is one of the important and effective counties of kurdistan in agriculture. however, with t...

development of remote sensing (rs) and gis techniques and that of landscape metrics in the late 1980s have caused to introduce a new dimension in the landscape ecology arena (the relationship between spatial patterns and ecological processes). however, scale dependence of some of landscape metrics and rs systems of different spatial resolution has resulted in particular attention into selection...

Results from Prior Support The Central Arizona Phoenix Project Long Term Ecological Research (CAP LTER) award (DEB 9714833-010) provided seed funds to initiate a long term experiment on trophic dynamics in urban settings in 2001. CAP LTER is one of 24 long-term sites funded by NSF. In the past, LTER sites have focused upon pristine locations, well removed from the myriad effects brought about b...

The ecological protection and sustainable development of Urumqi have become an important part the high-quality growth urban agglomeration on northern slope Tianshan Mountain. Under impacts multi-source factors, landscape pattern has changed due to it being in a fragile eco-environment, so network is desperately needed enhance security patterns. Taking city as study area, risk evaluation model m...