Swanson WHAT CAN HISTORY TELL US ABOUT FOREST LANDSCAPE DYNAMICS ?
نویسنده
چکیده
Historical forest landscape dynamics include consideration of spatial and temporal distributions of forest conditions over recent history and also historical disturbance regimes. Understanding of historical landscape dynamics in these senses is relevant to planning future management of federal forest lands on both policy and ecological grounds. Although some particular elements of our policy framework are in flux, the codified commitment to sustain native species is well accepted. The term “native” carries many implications about consideration of history and procedures for planning habitat management to sustain those species using an understanding of history. Recent guidance for management of Forest Service lands explicitly directs use of history to plan future management (the enacted Healthy Forest Restoration and the drafted rules to enact the new planning regulations under the National Forest Management Act). This policy direction reflects that ecosystem history embodied in properties of the biota and soil determines the capacity of a site to meet policy objectives.
منابع مشابه
What Can Phages Tell Us about Host-Pathogen Coevolution?
The outcomes of host-parasite interactions depend on the coevolutionary forces acting upon them, but because every host-parasite relation is enmeshed in a web of biotic and abiotic interactions across a heterogeneous landscape, host-parasite coevolution has proven difficult to study. Simple laboratory phage-bacteria microcosms can ameliorate this difficulty by allowing controlled, well-replicat...
متن کاملWhat do glaciers tell us about climate change?
Glacier are pretty and move around a lot on the landscape due to the random stochastic climate forcing inherent to a constant climate. They obviously also respond to changes in climate. The tricky part is whether, in absence of direct instrumental measurements, climate changes can be inferred from variations in glacier length.
متن کاملTrees Wanted—Dead or Alive! Host Selection and Population Dynamics in Tree-Killing Bark Beetles
Bark beetles (Coleoptera: Curculionidae, Scolytinae) feed and breed in dead or severely weakened host trees. When their population densities are high, some species aggregate on healthy host trees so that their defences may be exhausted and the inner bark successfully colonized, killing the tree in the process. Here we investigate under what conditions participating with unrelated conspecifics i...
متن کاملThe long-run evolution of energy prices
I examine the long-run behavior of oil, coal, and natural gas prices, using up to 127 years of data, and address the following questions: What does over a century of data tell us about the stochastic dynamics of price evolution, and how it should be modeled? Can models of reversion to stochastically fluctuating trend lines help us forecast prices over horizons of 20 years or more? And what do t...
متن کاملSynchronized deforestation induced by social learning under uncertainty of forest-use value
Article history: Received 23 August 2006 Received in revised form 7 November 2006 Accepted 18 November 2006 Deforestation often has been studied in terms of land-use models, in which natural processes such as ecological succession, physical disturbance and human decision-making are combined. In many land-use models, landowners are assumed to make decisions that maximize their utilities. However...
متن کامل