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traditional Lowlands Water management in Dano, South-Western Burkina Faso

Journal of Water Resource and Protection 2016年第4期8卷 425-434页

作者： Sié Pale Dapola Evariste Constant DA Polytechnic University Center of Ouahigouya/Department of Atmosphere Sciences University Ouaga I Pr Joseph KI-ZERBO/Department of geography

Lowland water resources management represents a challenge of the future that calls any community. Irrigated crops are grown in some areas of Burkina Faso, others are limited by a lack of irrigation infrastructure. Due to limited crop irrigation, crops and the associated populations dependent on them, depend on rain and on climatic factors. Thus, there is a need to understand and implement traditional mechanisms for managing lowland water in Dano, where climatic and geological conditions provide a sustained source of water. Here, I use a literature review combined with field work and interviews/questionnaires to estimate the potential exploitable plains to 16,056 ha or 24% of the communal area. management mechanisms and traditional operating systems of lowland waters were clear, which helped to set the technological level of farmers, in partial control of water management.

关键词： Burkina Faso Dano South Sudanese Climate Lowlands traditional management

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Occurrence of an endangered grassland butterfly is mainly driven by habitat heterogeneity,food availability,and microclimate

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Insect Science 2022年第4期29卷 1211-1225页

作者： Gwydion Scherer Thomas Fartmann Department of Biodiversity and Landscape Ecology University of OsnabrückOsnabrückGermany Institute of Biodiversity and Landscape Ecology(IBL) MünsterGermany

The Marsh Fritillary(Euphydryas aurinia)was once widespread in large parts of Central Europe.However,in the course of the last century,populations of the butterfly largely collapsed.Here,we surveyed patch and microhabitat occupancy and its drivers in one of the last vital populations in calcareous grasslands.Our study revealed that environmental conditions at the landscape and habitat level determined the occurrence of E.aurinia in a montane agricultural landscape with low land-use intensity.Patch occupancy increased with the cover of Devil's-bit Scabious(Succisa pratensis)grasslands in the surroundings of the patches,habitat heterogeneity and host-plant cover.Microhabitat occupancy was driven by a warm microclimate and high availability of host plants.In the well-connected landscape of nutrient-poor grasslands,patch occupancy of E.aurinia was driven by parameters defining a high habitat quality.Habitat heterogeneity very likely buffers E.aurinia populations against environmental stochasticity and,hence,enhances long-term viability.For the gregariously feeding caterpillars of E.aurinia,host-plant biomass is essential.Due to their more luxuriant growth,S.pratensis plants were clearly preferred,although the Glossy Scabious(Scabiosa lucida)was also widespread.Additionally,the growth of large Succisa plants was favored by soil humidity and grassland abandonment.To cope with the adverse macro-and mesoclimatic conditions of the study area,females of the butterfly selected host plants growing in extraordinarily warm microhabitats for oviposition.To secure long-term viability of E.aurinia populations,we recommend creating mosaics of traditionally managed grasslands and early stages of abandonment within the patches.

关键词： agricultural landscape calcarcous grassland hay meadow host-plant abundance land-use change traditional management

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