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Displaying 1201 - 1205 of 1605Association of ant nests with successional stages of biological soil crusts in the Tengger Desert, Northern China
Biological soil crusts are important cover in arid desert landscapes, yet their importance as habitats to secondary producers such as ants is relatively unknown. This study was conducted to determine if the presence and development of biological soil crusts on dune surfaces stabilized by revegetation facilitates ant establishment and survival. We measured topsoil properties and crustal features during different successional stages, which were characterized by cyanobacteria and algae, lichens, and mosses, respectively.
Network analysis to assess landscape connectivity trends: Application to European forests (1990–2000)
Landscape networks and ecosystems worldwide are undergoing changes that may impact in different ways relevant ecological processes such as gene flow, pollination, or wildlife dispersal. A myriad of indices have been developed to characterize landscape patterns, but not all of them are equally suited to evaluate temporal changes in landscape connectivity as is increasingly needed for biodiversity monitoring and operational indicator delivery.
Definition of the potential treeline in the European Alps and its benefit for sustainability monitoring
Sustainability indicator systems often use administrative entities as a reference, which may cause over- or underestimations of results within topographically different regions. Within the European Alps the highest impacts due to human activities are concentrated below the potential treeline, making these zones comparable to the potentially highly impacted surroundings of the European Alps. An application of the area below the potential treeline as a reference unit for sustainability indicators allows for a more equitable comparison of the European Alps and their surroundings.
Solar chimneys integrated with sea water desalination
A new solar chimney power system with integration of sea water desalination has been introduced for the production of electricity and fresh water in this paper. Two mathematical models have been developed individually for a one-dimensional flow in solo solar chimney power system and this system. Through theoretical analysis, it has been demonstrated the integrated system can significantly improve the solar energy utilization efficiency as well as the land resources utilization efficiency, at the same time, the economic, social and ecological benefits can also be significant.
Early succession arthropod community changes on experimental passion fruit plant patches along a land-use gradient in Ecuador
Many tropical landscapes are today characterized by small forest patches embedded in an agricultural mosaic matrix. In such highly fragmented landscapes, agroforests have already been recognized as refuges for biodiversity but few studies have investigated the potential of non-forested land-use types to contribute to overall biodiversity of functionally important taxa in the tropics.