Titlebook: Ecological Principles of Nature Conservation; Application in Tempe Lennart Hansson Book 1992 Elsevier Science Publishers Ltd 1992 ecologica

Cerebrovascular

Conservation Biology in Agricultural Habitat Islands,lity of habitats. Economy forces modern farmers to establish large fields that are easily worked. Ditches, habitat islands (piles of stone or shallow soils covered with vegetation) and irregularities in the fields are considered as obstacles and are therefore often removed. From a conservation point

時(shí)代錯(cuò)誤

Epilogue: Towards an Applied Ecological Theory?,ere then surveyed for a large number of boreal and temperate environments, with an analysis of the applicability and utility of present ecological theory in relation to such problems. The authors were well aware of modern developments in ecological theory and had also prepared themselves in several

小丑

入伍儀式

https://doi.org/10.1007/978-3-8348-9638-4y on Earth (Burgess & Sharpe, 1981; Harris, 1984; Saunders et al., 1987). Usually the effects are measured as the local, regional or irreversible loss of species. For communities and important processes, however, conditions may be altered long before any of the individual species actually disappear.

休息

和平主義者

Graduated

坦白

易受騙

Communication and Decision-makingnland. The boreal coniferous forest, or taiga, is the dominant biome, with a latitudinal extension from 56°N to 69°N (Fig. 7.1). The total area of the Fennoscandian forest amounts to more than 50 million ha, of which 13% occurs in Norway, 40% in Finland and 47% in Sweden (Nordic Statistical Secretar

Airtight

Interest Groups, Objectives and Strategywith a high water table) (Svensson ., 1989). The area occupied by wet forest, particularly the damp, shady type of late successional spruce, is steadily being reduced as a result of various forest practices such as clear-felling and drainage. SOU (1978) predicted that these operations would affect h