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Displaying 1011 - 1015 of 1195

Plant use and management in homegardens and swiddens: evidence from the Bolivian Amazon

Journal Articles & Books
декабря, 2010
Bolivia

Amazonian plant management is perhaps nowhere as intense as in homegardens and swiddens. A quantitative ethnobotanical study was conducted in Indigenous Territory and National Park Isiboro-Sécure, Bolivia, to investigate plant use and management in homegardens and swiddens by local Yuracaré and Trinitario ethnic groups. Ethnobotanical data of plants were obtained from 11 Yuracaré and 11 Trinitario participants through semistructured interviews.

Traditional perennial crop-based agroforestry in West Java: the tradeoff between on-farm biodiversity and income

Journal Articles & Books
декабря, 2010

Agroforestry systems have been re-evaluated with a renewed scientific interest as appropriate models for achieving sustainable production while maintaining planned and associated biodiversity and agroecosystem functioning. Traditional bamboo-tree gardens in West Java are known to play substantial ecological and socioeconomic roles. In this study, we attempted to elucidate the relationship between income generation and biodiversity by studying 83 bamboo-tree gardens that varied in species composition and degree of commercialization.

Bird foraging height predicts bird species response to woody vegetation change

Journal Articles & Books
декабря, 2010

Accurate a priori predictions of the sensitivity of species to vegetation management depend on an understanding of mechanisms underlying species response. To date information on where birds forage in the vegetation strata has been used to predict bird species response to vegetation change caused by livestock grazing. Profiting from this link between vegetation structural diversity and bird diversity, we test whether this variable, bird foraging height, can be used to predict the impact of a different type of habitat alteration; vegetation encroachment.

Monitoring land use/land cover changes using CORINE land cover data: a case study of Silivri coastal zone in Metropolitan Istanbul

Journal Articles & Books
декабря, 2010
Turkey
Europe

The objective of the present study was to assess changes in land use/land cover patterns in the coastal town of Silivri, a part of greater Istanbul administratively. In the assessment, remotely sensed data, in the form of satellite images, and geographic information systems were used. Types of land use/land cover were designated as the percentage of the total area studied. Results calculated from the satellite data for land cover classification were compared successfully with the database Coordination of Information on the Environment (CORINE).

resource ratio model of the effects of changes in CO₂ on woody plant invasion

Journal Articles & Books
декабря, 2010

It is expected that elevated CO₂ levels may have an important positive effect on the dominance of woody plants over grasses in savannas and grasslands. I propose that these changes in the relative abundance of trees and shrubs over grasses may be explained by Tilman's resource ratio models. This change will occur because C₃ trees will have higher net photosynthetic rates than C₄ grasses which predominate in savannas. This will cause trees to have higher growth rates than grasses.