2,335,596 research outputs found

    The efficacy of hazardous fuel treatments: A rapid assessment of the economic and ecologic consequences of alternative hazardous fuel treatments

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    Several persistent questions related to wildfire economics and fuel treatment effectiveness continue to concern federal budget analysts at the Office of Wildland Fire in the U.S. Department of Interior. In the summer of 2012, the Ecological Restoration Institute was asked to critically examine the role and effectiveness of fuel reduction treatments for addressing the severity of wildland fire and the effects on suppression costs. ERI gathered a team of university-affiliated and independent economists to research and analyze these questions to determine if and when investments in fuel reduction treatments will reduce federal wildland fire suppression costs, decrease fire risk to communities, and prevent resource damage. The results from this rapid assessment are detailed in this special report to the Office of Wildland Fire

    Do interactions between plant roots and the rhizosphere affect parasitoid behaviour?

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    Multitrophic interactions are powerful forces shaping the structure of living communities. Plants encounter a great diversity of organisms in their environment: some of these interactions are beneficial (e.g. symbiotic fungi and insect pollinators) while some are detrimental (e.g. herbivorous insects and pathogenic micro-organisms). Multitrophic interactions between below-ground and above-ground organisms are receiving increasing attention because they may influence plant defences against biotic and abiotic stresses. In this study we show that an arbuscular mycorrhizal symbiosis makes tomato plants significantly more resistant towards aphids, by enhancing both direct defences, both attractivity towards aphid parasitoids

    Ecological Aspects and Conservation of Wild Grapevine Populations in the S.W. of the Iberian Peninsula

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    Populations of wild grapevine, Vitis vinifera L. subsp. sylvestris (Gmelin) Hegi, were discovered in S.W. of the Iberian Peninsula over the last years. Location, ecological aspects, sanitary characteristics, including the ELISA test to detect specific virus attack, are described. In vitro propagation and conservation are also considered. The paper also contains a global description of female and male individuals. This material could be used to start breeding programs of cultivated varieties and also to restore riverbank forests, which constitute one of the worst preserved ecosystems in the area

    Greenways and Ecological Networks: Concepts, Differences, Similarities

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    In recent decades green infrastructure (GI) frameworks have been widely used for developing theoretical and practical models of sustainable land reorganization. Although there is still much confusion regarding various aspects of green infrastructure, since many differing perspectives have generated different definitions that emphasise the complexity of the green infrastructure concept, it is possible to find important differences and common points

    Feminist Ecological Economics

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    This article provides an overview of feminist ecological economics, with special attention to three particular aspects: its theoretical foundations and relation to other schools of thought, its implications for activism and public policy, and directions for future research work.This research was supported by the Social Sciences and Humanities Research Council of Canad
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