نتایج جستجو برای: forest service

تعداد نتایج: 431278  

Journal: :Ecological applications : a publication of the Ecological Society of America 2013
Taylor H Ricketts Eric Lonsdorf

Natural ecosystems benefit human communities by providing ecosystem services such as water purification and crop pollination. Mapping ecosystem service values has become popular, but most are static snapshots of average value. Estimating instead the economic impacts of specific ecosystem changes can better inform typical resource decisions. Here we develop an approach to mapping marginal values...

2016
Mouhammd Alkasassbeh Ghazi Al-Naymat Mohammad Almseidin

Users and organizations find it continuously challenging to deal with distributed denial of service (DDoS) attacks. . The security engineer works to keep a service available at all times by dealing with intruder attacks. The intrusiondetection system (IDS) is one of the solutions to detecting and classifying any anomalous behavior. The IDS system should always be updated with the latest intrude...

2015
Alejandro Prera Jennifer Thacher Kristine Grimsrud Dan McCollum Robert Berrens

In 2005, the Federal Lands Recreation Enhancement Act gave public land agencies discretion in the management of funds collected through recreation fees. However, this legislation is set to expire in 2015, which will lead to a reduction in available financial resources to maintain recreation services and to protect the environment. We use a unique dataset to analyze the impact of changes in fee ...

1999
Francis A. Roesch

A plan for the spatial analysis for the sample design for the detection monitoring phase in the joint USDA Forest Service/EPA Forest Health Monitoring Program (FHM) in the United States is discussed. The spatial analysis procedure is intended to more quickly identify changes in forest health by providing increased sensitivity to localixed changes. The procedure is initiated with a series of med...

2015
Hailemariam Temesgen David Affleck Krishna Poudel Andrew Gray John Sessions

A review of the challenges and opportunities in estimating above ground forest biomass using treelevel models Hailemariam Temesgen, David Affleck, Krishna Poudel, Andrew Gray & John Sessions a Department of Forest Engineering, Resources and Management, Oregon State University, Corvallis, OR 97333, USA b College of Forestry and Conservation, The University of Montana, 32 Campus Drive, Missoula, ...

2005
Gordon A. Bradley

This paper reports on a collaborative project between the Washington State Department of Natural Resources (DNR) and the USDA Forest Service, Pacific Northwest Research Station (PNW), in cooperation with the University of Washington College of Forest Resources (UW). The collaborators are conducting a joint study of the silvicultural, economic, and visual effects of alternative timber harvest pa...

2001
Francis A. Roesch

Three methods of estimating the current state of forest attributes over small areas for the USDA Forest Service Southern Research Station’s annual forest sampling design are compared. The three methods were (I) simple moving average, (II) single imputation of plot data that had been updated by externally developed models, and (III) local application of a global model that was determined through...

2015
Anatoly Shvidenko Dmitry Schepaschenko Sabine Fuss Florian Kraxner Michael Obersteiner

Prerequisites of a system methodology of evaluation of carbon sequestration service of forests (CSS) inter alia include: 1) need of assessment of the CSS in biophysical terms, in form of the Full Verified Carbon Account (FCA); 2) an ultimate proxy indicator of the FCA is Net Ecosystem Carbon Budget of forest ecosystems (NECB); 3) need of explicit spatio-temporal distribution of the service (in ...

2012
L. Wang J. Liu G. Sun

L. Wang1,2, J. Liu3, G. Sun4, X. Wei5, S. Liu6, and Q. Dong7 1Department of Earth Sciences, Indiana University – Purdue University, Indianapolis (IUPUI), Indianapolis, IN 46202, USA 2Water Research Center, School of Civil and Environmental Engineering, University of New South Wales, Sydney NSW, 2052, Australia 3School of Nature Conservation, Beijing Forestry University, Beijing, 100083, China 4...

2015
Rohit Verma Jordan J. Louviere Paul Burke

Government and public services have to not only enforce the requirements of the regulatory policies, but also have to satisfy the needs of preferences of their clients and customers. In this paper, we summarize the results of a multi-year case study conducted to assess the choices of campground users at the Shawnee National Forest (Illinois), which is managed by United States Forest Service. Th...

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