نتایج جستجو برای: china udsa forest service rmrs p
تعداد نتایج: 1850109 فیلتر نتایج به سال:
Intra-specific variation in life history and mating strategies can lead to differences in energy allocation and expenditure in males and females. This may, in turn, explain large-scale evolutionary patterns. In this study, I investigated the effects of body mass, temperature and sex on resting metabolic rates (RMRs) in sexually mature male and female tarantulas (Aphonopelma anax (Chamberlin)), ...
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...
This paper addresses the effects of economic transition policies on forestry in China. The effects of de-collectivization and market liberalization on the forest land area and timber harvest are studied using panel data from four provinces covering the period 1978]1995. Fixed effects ordinary least squares models for forest land cover and annual harvests per hectare are estimated, allowing for ...
Forest ecosystem could significantly sequestrate some atmospheric CO2 and, therefore, partly mitigate current pressure on global warming. The carbon sequestration capacity of forest ecosystem is determined by both the NPP increase trend and turnover time. In order to estimate the capability of forest C sequestration in China, a carbon turnover model, which bases on NPP increase trend monitored ...
Effects of vegetation patterns on yields of the surface and subsurface waters in the Heishui Alpine Valley in west China Y. Liu, S. An, Z. Deng, N. Fan, H. Yang, Z. Wang, Y. Zhi, C. Zhou, and S. Liu Laboratory of Forest Ecology and Global Changes, School of Life Sciences, Nanjing University, Nanjing 210093, China Institute of Forest Ecology, Environment and Protection, the Chinese Academy of Fo...
The paper provides an historical overview of the gradual but erratic evolution of collective forest rights in the People’s Republic of China. Forest tenure rights have been subject to numerous changes since the establishment of People’s Republic in 1949. In the most recent decades, use rights for forests have been transferred from collective to individual household-based with the intent to prov...
Deying Zhanga,1, Guangping Zenga,1, Yan Zhangb, Xing Liua, Shengde Wua, Yi Huaa, Feng Liua, Peng Lua, Chuan Fengc, Bin Qinc,∗, Jinhua Caic, Yuanyuan Zhangd,∗, Dawei Hea, Tao Lina,∗ and Guanghui Weia aDepartments of Urology, Children’s Hospital of Chongqing Medical University, Chongqing, China bChongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Stomatological ...
traffic prediction systems can play an essential role in intelligent transportation systems (its). prediction and patterns comprehensibility of traffic characteristic parameters such as average speed, flow, and travel time could be beneficiary both in advanced traveler information systems (atis) and in its traffic control systems. however, due to their complex nonlinear patterns, these systems ...
The Chinese government is currently implementing a major change in its national policy on forest tenure and management rights that will have a profound effect on many aspects of forest quality and use, including rural livelihoods and development (Zhang et al., 2000; Wang et al., 2008). These effects will have global impact, as China possesses the world’s fifth largest forest area (State Forestr...
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