Unsustainable fuelwood extraction from South African savannas
نویسندگان
چکیده
منابع مشابه
Mapping tree species composition in South African savannas using an integrated airborne spectral and LiDAR system
a Council for Scientific and Industrial Research (CSIR), Natural Resources and Environment (NRE), Earth Observation Group, P.O. Box 395, Pretoria 0001, South Africa b Department of Global Ecology, Carnegie Institution for Science, 260 Panama Street, Stanford, CA 94305, USA c RIT: Center for Imaging Science, Digital Imaging and Remote Sensing Group, 54 Lomb Memorial Drive, Building 76‐3124, Roch...
متن کاملSpiny plants, mammal browsers, and the origin of African savannas.
Savannas first began to spread across Africa during the Miocene. A major hypothesis for explaining this vegetation change is the increase in C4 grasses, promoting fire. We investigated whether mammals could also have contributed to savanna expansion by using spinescence as a marker of mammal herbivory. Looking at the present distribution of 1,852 tree species, we established that spinescence is...
متن کاملA SAR-Based Index for Landscape Changes in African Savannas
Change detection is one of the main applications in earth observation but currently there are only a few approaches based on radar imagery. Available techniques strongly focus on optical data. These techniques are often limited to static analyses of image pairs and are frequently lacking results which address the requirements of the user. Some of these shortcomings include integration of user’s...
متن کاملHow large herbivores subsidize aquatic food webs in African savannas.
Mass migration—the periodic, synchronized movement of large numbers of animals from one place to another— is an important part of the life cycle of many species. Such migrations are variously a means of avoiding climatic stress, escaping food and water scarcity, and satiating predators (thereby reducing individuals’ risk of being eaten). They are among the most spectacular of natural phenomena,...
متن کاملAnalysis of Scale from Some South African
Several samples of evaporator scale collected during the 1993 and 1994 milling seasons were analysed using x-ray diffraction, x-ray fluorescence, scanning electron microscopy and optical microscopy. The results were evaluated in terms ofcurrent knowledgeofevaporator foulingand similar trends were found to those published in the literature. From these results, typical evaporator scale profiles c...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Environmental Research Letters
سال: 2013
ISSN: 1748-9326
DOI: 10.1088/1748-9326/8/1/014007