Titlebook: Developing Principles and Models for Sustainable Forestry in Sweden; Harald Sverdrup,Ingrid Stjernquist Book 2002 Springer Science+Busines

带伤害

On Swedish forests,o north, the biotic zonations cover the nemoral, boreo-nemoral and boreal zones (Sjörs 1965). The border between the nemoral and the boreo-nemoral zones is defined by the southern distribution limit of Norway spruce. Most of the southern counties of Scania, Blekinge and Halland are within the nemora

刚毅

Defining sustainability,the United Nations in 1983, The Brundtland Commission, initiated the first serious discussions with real political implications. The commission’s definition of sustainability has been referred to by diverse bodies as constituting a basis for policies and practices designed to support a society being

Axon895

Principles of sustainable forest management,sal for Improved Forest Husbandry in Sweden), which was the main textbook on the subject in Sweden for almost a century. He was uncritically in favour of systematic clear-felling and the development of single aged stands. Israel Ström and his followers taught and defended clear-cutting in an era in

出生

Integrated modelling, be investigated and data from such systems to be interpreted. With models, the interaction of several simultaneous processes in a single experiment can be studied. Basically models serve one or both of the two following aims;

AGGER

Models of the risk of windthrow and frost,en concentrated upon the risks of damages by wind and frost, landscape level models for which will be presented below. A landscape is defined as an area of anywhere from a few km. to several tens of km..

Dappled

Biogeochemical processes and mechanisms,d in the next step biogeochemical modelling taken in SUFOR. There are several models for nutrient dynamics and growth available, however, development of these have in some respects moved in old tracks for the last decade. We see several drawbacks in these older constructs with respect to operational

SEED

GOAD

Biodiversity in sustainable forestry, styles, ways of land-use and production and the associated load of environmental pollution. Current risks of irreversible loss of habitats and extinction of species is incomparably greatest in species rich tropical areas of the developing South. Nevertheless, concerns for loss of local biodiversity

滔滔不绝地说

Uncultured

Assessing effects of wildlife on forestry,en 1987; Cederlund and Liberg 1995). A significant increase in the cervine population was also observed in most other European countries during this period. The regulation of hunting, the decline in predators and changes in land use are believed to be the major causes of this population increase (Ku