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Displaying 891 - 895 of 1195Landowners’ ability to leverage in negotiations over habitat conservation
Voluntary conservation agreements are commonly used to stem the impact of habitat destruction and degradation on terrestrial biodiversity. Past studies that aim to inform how resources for conservation should be allocated across land parcels have assumed the costs of securing conservation on sites can be estimated solely on the basis of the value of alternative land uses. However, in a voluntary negotiation, a landowner could hold-out for a higher payment based on a conservation group or agency’s willingness-to-pay by leveraging the value of biodiversity on the property.
Maximizing seed germination in two Acacia species
Revegetation of disturbed land, particularly in arid environment, is often hindered by low seedling establishment. Information on seed biology and germination cues of valuable species is lacking. We investigated seed germination of two Acacia species (Acacia tortilis (Forsk.) Hayne and Acacia oerfota (Forssk) schweinf), required for nitrogen fixation and rehabilitation of arid and semi-arid areas.(four pre-germination seed treatments were applied in order to find the best treatment in germinating acacia species. The medium was L 2 and three replicates were used.
Larval ecology of mosquitoes in sylvatic arbovirus foci in southeastern Senegal
BACKGROUND: Although adult mosquito vectors of sylvatic arbovirus [yellow fever (YFV), dengue-2 (DENV-2) and chikungunya (CHIKV)] have been studied for the past 40 years in southeastern Senegal, data are still lacking on the ecology of larval mosquitoes in this area. In this study, we investigated the larval habitats of mosquitoes and characterized their seasonal and spatial dynamics in arbovirus foci. METHODS: We searched for wet microhabitats, classified in 9 categories, in five land cover classes (agriculture, forest, savannah, barren and village) from June, 2010 to January, 2011.
“The Trust is Over! We Want to Plough!”: Social Differentiation and the Reversal of Resettlement in South Africa
In the early 1980s residents of Hobeni, in South Africa’s Eastern Cape, were subjected to forced resettlement, under “betterment” policy ostensibly aimed at soil conservation. They were moved into a spatially contiguous but socially differentiated village. South Africa’s political transition ended this policy, and in the early 1990s, some people, mainly from part of the resettlement area (Kunene) characterized by dense kinship networks who had faced pressure to leave, and began to return voluntarily to their former sites, opting to live in dispersed, flexible settlements.
Remote sensing and GIS-based landslide susceptibility mapping using frequency ratio and analytical hierarchy methods in Rize province (NE Turkey)
The northeast part of Turkey is prone to landslides because of the climatic conditions, as well as geologic and geomorphologic characteristics of the region. Especially, frequent landslides in the Rize province often result in significant damage to people and property. Therefore, in order to mitigate the damage from landslides and help the planners in selecting suitable locations for implementing development projects, especially in large areas, it is necessary to scientifically assess susceptible areas.