Cost-effective age structure and geographical distribution of boreal forest reserves
نویسندگان
چکیده
منابع مشابه
Cost-effective age structure and geographical distribution of boreal forest reserves
1. Forest reserves are established to preserve biodiversity, and to maintain natural functions and processes. Today there is heightened focus on old-growth stages, with less attention given to early successional stages. The biodiversity potential of younger forests has been overlooked, and the cost-effectiveness of incorporating different age classes in reserve networks has not yet been studied...
متن کاملCost-efficient Conservation Strategies for Boreal Forest Biodiversity
Perhans, K. 2008. Cost-efficient conservation strategies for boreal forest biodiversity. Doctor’s dissertation. ISSN 1652-6880, ISBN 978-91-85913-72-5 Long and intensive forest management has made conservation measures in the forest landscape necessary to maintain forest biodiversity. The most common measure is to set aside land for conservation purposes. This, however, requires large financial...
متن کاملForest structure and downed woody debris in boreal, temperate, and tropical forest fragments.
Forest fragmentation affects the heterogeneity of accumulated fuels by increasing the diversity of forest types and by increasing forest edges. This heterogeneity has implications in how we manage fuels, fire, and forests. Understanding the relative importance of fragmentation on woody biomass within a single climatic regime, and along climatic gradients, will improve our ability to manage fore...
متن کامل6 . Boreal Forest
The boreal forest biome occupies 13 x I06km1. It comprises approximately 25% of the world's forest land (Olson et al. 1983; Apps et al. 1993) and includes 2.6 x 106km1 of peatlands (Gorham 1991). Changes in the extent or functioning of the boreal forest wuld substantially modify global climate through (1) release of its large stocks of soil carbon (Post et al. Boreal forests have also been impl...
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هدف از انجام این تخقیق بررسی رابطه احتمالی بین سطح مهارت زبان خارجی (foreign language proficiency) و ساختار مهارت زبان خارجی بود. تعداد 314 زبان آموز مونث و مذکر که عمدتا دانشجویان رشته های زبان انگلیسی در سطوح کارشناسی و کارشناسی ارشد بودند در این تحقیق شرکت کردند. از لحاظ سطح مهارت زبان خارجی شرکت کنندگان بسیار با هم متفاوت بودند، (75 نفر سطح پیشرفته، 113 نفر سطح متوسط، 126 سطح مقدماتی). کلا ...
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ژورنال
عنوان ژورنال: Journal of Applied Ecology
سال: 2010
ISSN: 0021-8901
DOI: 10.1111/j.1365-2664.2010.01897.x