نتایج جستجو برای: astara forest ecosystem
تعداد نتایج: 179070 فیلتر نتایج به سال:
The forest rotations problem has been considered by generations of economists (Fisher, 1930; Boulding, 1966; Samuelson, 1976). Traditionally, the forest resource across all future harvest periods is assumed to grow without memory of past harvest periods. This paper integrates economic theory and intertemporal ecological mechanics, linking current harvest decisions with future forest growth, fin...
NED-2 is a sophisticated, intelligent, goal driven, and integrated multi-agent decision support system for forest ecosystem management. NED-2 currently integrates various forest mangement tools and models, including vegetation growth and yield models, wildlife models, management models for timber, ecology, water, and visual quality goals, GIS reporting tool, HTML report generating tool, etc.. T...
Jensen, M.E.; Bourgeron, P.S., tech. eds. 1994. Volume II: Ecosystem management: principles and applications. Gen. Tech. Rep. PNW-GTR-318. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 376 p. (Everett, Richard L., assessment team leader; Eastside forest ecosystem health assessment). This document provides land managers with practical suggestio...
The human ecosystem Part I: The human ecosystem as an organizing concept in ecosystem management Gary E. Machlis a , Jo Ellen Force b & William R. Burch JR. c a Cooperative Park Studies Unit, National Park Service, Department of Forest Resources, University of Idaho, Moscow, Idaho, 83844–1133, USA E-mail: [email protected] b Department of Forest Resources, University of Idaho, Moscow, Idaho, ...
Forest ecosystems make a greater contribution to carbon (C) stocks than any other terrestrial ecosystem. To understand the role of regional forest ecosystems in global climate change and carbon exchange, forest C stocks and their spatial distribution within the small (2300 km2) Liuxihe River basin in China were analyzed to determine the different contributors to the C stocks. Forest C stocks we...
Reliable predictions of how changing climate and disturbance regimes will affect forest ecosystems are crucial for effective forest management. Current fire and climate research in forest ecosystem and community ecology offers data and methods that can inform such predictions. However, research in these fields occurs at different scales, with disparate goals, methods, and context. Often results...
Urbanisation and a changing climate are leading to more frequent and severe flood, heat and air pollution episodes in Britain's cities. Interest in nature-based solutions to these urban problems is growing, with urban forests potentially able to provide a range of regulating ecosystem services such as stormwater attenuation, heat amelioration and air purification. The extent to which these bene...
1. Forests (natural but also human-made or modified) are among the most important providers of ecosystem services for the whole world. 2. Based on scientific evidence, it is certain that: (a) Ecosystem services are essential to the survival of human beings. (b) Forest ecosystems operate and provide services on such a grand scale and in such intricate and little-explored ways that most cannot ef...
Forest regeneration following disturbance is a key ecological process, influencing forest structure and function, species assemblages, and ecosystem-climate interactions. Climate change may alter forest recovery dynamics or even prevent recovery, triggering feedbacks to the climate system, altering regional biodiversity, and affecting the ecosystem services provided by forests. Multiple lines o...
Much research in recent years has analyzed the ecosystem service aspect of forests, while highlighting the need for sustainable forests. Forest management mechanisms at an inter-institutional level in Japan have been identified to hinder the implementation of forest management that is focused on the equal production of ecosystem services. This study presents an institutional analysis of unsusta...
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