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Displaying 401 - 405 of 1195Appraisal of land use/land cover of mangrove forest ecosystem using support vector machine
Human activities in many parts of the world have greatly changed the natural land cover. This study has been conducted on Pichavaram forest, south east coast of India, famous for its unique mangrove bio-diversity. The main objectives of this study were focused on monitoring land cover changes particularly for the mangrove forest in the Pichavaram area using multi-temporal Landsat images captured in the 1991, 2000, and 2009.
Participatory assessment of the sustainability of livelihoods in the agroecosystem of Abesard, Iran
In order to improve the livelihoods of communities and make them more sustainable, study of the vulnerability of livelihoods seems necessary. In this paper, participatory vulnerability analysis was used within a sustainable rural livelihoods framework to assess the sustainability of livelihoods in the agroecosystem of Abesard, Iran. In addition, this paper explored vulnerability contexts that affect livelihood assets. Findings revealed that land use change, climate variability, market fluctuations and higher mechanisation were the main reasons of vulnerability.
Spatiotemporal characterization of land surface temperature in Mount Kilimanjaro using satellite data
Mount Kilimanjaro is considered the highest free-standing mountain in the world and a symbol of the African continent. Steep slopes and high altitudes are on the backdrop of unique biophysical characteristics, in which changes between savannas, tropical cloud forests, and subalpine vegetation can be observed in relatively small distances. In the context of this complex and heterogeneous landscape, describing the interactions between climatic variables and ecosystem functions is crucial for understanding the drivers of biodiversity.
Spatiotemporal patterns of urbanization over the past three decades: a comparison between two large cities in Southwest China
China’s economic development over the past three decades has been remarkable due to the establishment of the “Reform and Opening-up” program. Meanwhile, urbanization, one of the most intensive human activities, has significantly changed the land cover across China. Here we used remote sensing data and landscape metrics to explore the spatiotemporal patterns of urbanization in two large Chinese cities, Chengdu (1978–2010) and Chongqing (1976–2010).
Historical distribution and host-vector diversity of Francisella tularensis, the causative agent of tularemia, in Ukraine
BACKGROUND: Francisella tularensis, the causative agent of tularemia, is a zoonotic agent that remains across much of the northern hemisphere, where it exists in enzootic cycles. In Ukraine, tularemia has a long history that suggests a need for sustained surveillance in natural foci. To better characterize the host-vector diversity and spatial distribution of tularemia, we analyzed historical data from field collections carried out from 1941 to 2008. FINDINGS: We analyzed the spatial-temporal distribution of bacterial isolates collected from field samples.