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Displaying 246 - 250 of 1195

“Brasilience:” Assessing Resilience in Land Reform Settlements in the Brazilian Cerrado

Journal Articles & Books
Décembre, 2015
Brésil

This study assessed the socioecological resilience of family farms in three land reform settlements in Mato Grosso, Brazil, located in the ecologically threatened Cerrado biome. Using focus groups, a household survey, and analysis of soil samples we characterized farming systems and quantified indicators of resilience, which we contextualized with a qualitative analysis of distributions of power and access to rights and resources.

Land management impacts on tree hole invertebrate communities in a Neotropical rainforest

Journal Articles & Books
Décembre, 2015
Mexique

The Los Tuxtlas Biosphere Reserve in Southeastern Veracruz, Mexico represents the northernmost Neotropical lowland rainforest and has lost 84 % of its forests in the last forty years. Rich terrestrial and aquatic species communities are found throughout Neotropical forests, habitats increasingly threatened by land management practices. Plant-held waters, phytotelmata, are ecologically important discrete microhabitats harboring many specialist invertebrates and are abundant in tropical forests.

Evaluating pasture and soil allowance of manganese for Kajli rams grazing in semi-arid environment

Journal Articles & Books
Décembre, 2015

The current research on the manganese (Mn) transfer from soil to plant as well as to grazing Kajli rams in the form of sampling periods was carried out under semi-arid environmental conditions. Forage, soil and blood plasma samples were collected during 4 months of the year after a 1-month interval, and Mn concentrations were assessed after wet digestion using an atomic absorption spectrophotometer.

Simulation of land use/land cover change and its effects on the hydrological characteristics of the upper reaches of the Hanjiang Basin

Journal Articles & Books
Décembre, 2015

In any watershed, many factors influence land use/cover change (LUCC). The nonlinear relationships between these factors and LUCC are very complicated and make it difficult to build a model that is capable of accurately simulating the range of physical processes. The aim of this study was: (1) to simplify the structure of a simulation model and improve its simulation speed, and (2) evaluate the impact of land use/cover change on surface runoff and evapotranspiration.

effect of landscape structure on two species of different trophic levels in an arid environment

Journal Articles & Books
Décembre, 2015
Argentine

CONTEXT: Insect species of different trophic level will respond differently to landscape configuration. OBJECTIVE: In this context we explore the way landscape structure affects the distribution and abundance of the whitefly Siphoninus phillyreae and its predator Clitostethus arcuatus in olive orchards. METHODS: Adult individuals of these two species were collected using sticky traps placed in 12 olive host patches in Argentina. Host patches were detected and quantified using Landsat 5 TM images. Different landscape metrics were estimated for the study area land covers.