نتایج جستجو برای: so decrease biodiversity increase agricultural value added
تعداد نتایج: 2313345 فیلتر نتایج به سال:
In the Luangwa Valley, Zambia, persistent poverty and hunger present linked challenges to rural development and biodiversity conservation. Both household coping strategies and larger-scale economic development efforts have caused severe natural resource degradation that limits future economic opportunities and endangers ecosystem services. A model based on a business infrastructure has been dev...
One of the central problems in migration measurement arises as a consequence of the different sources of migration data. Most information regarding migration is obtained from population censuses or population registers that report migration data for a given time interval. Another source of migration data is the sample survey which may be designed to provide information about both migrants and...
urban environments rely on the surrounding natural ecosystems remnants as providers of ecosystemfunctions, therefore these areas not only support a unique biodiversity but also have a social value for maintainingpublic health andwellbeing. for this reason, urbanization is considered to be one the biggest threats to ecosystems,leading to native biodiversity simplification and, thus, to a detrime...
Lenore Fahrig,* Jacques Baudry, Lluı́s Brotons, Françoise G. Burel, Thomas O. Crist, Robert J. Fuller, Clelia Sirami, Gavin M. Siriwardena and Jean-Louis Martin Abstract Biodiversity in agricultural landscapes can be increased with conversion of some production lands into morenatural – unmanaged or extensively managed – lands. However, it remains unknown to what extent biodiversity can be enhanc...
during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...
Biodiversity and community structure of macrofauna of the intertidal sandy beach at Chabahar Bay were studied for a period of ten months in 2007. A total of 32 species were observed and identified in this study so that polychaete with 16 species was numerically dominant. The results showed changing densities were influenced by monsoon season so that maximum density (1935.47 ind/m2) was observed...
This study spatially assesses, quantifies, and visualizes the agricultural expansion and land use intensification in the northwestern foothills of Mount Kenya over the last 30 years: processes triggered by population growth, and, more recently, by large-scale commercial investments. We made use of Google Earth Engine to access the USGS Landsat data archive and to generate cloud-free seasonal co...
BACKGROUND Kenya has a high prevalence of underweight and stunting in children. It is believed that both agricultural biodiversity and seasonal rainfall influences household food security and dietary intake. In the present study we aimed to study the effects of agricultural biodiversity and seasonal rains on dietary adequacy and household food security of preschool Kenyan children, and to ident...
Farmland biodiversity is an important characteristic when assessing sustainability of agricultural practices and is of major international concern. Scientific data indicate that agricultural intensification and pesticide use are among the main drivers of biodiversity loss. The analysed data and experiences do not support statements that herbicide-resistant crops provide consistently better yiel...
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