نتایج جستجو برای: forest policies

تعداد نتایج: 226168  

Journal: :Ambio 2007
Timothy J Killeen Veronica Calderon Liliana Soria Belem Quezada Marc K Steininger Grady Harper Luis A Solórzano Compton J Tucker

Land-cover change in eastern lowland Bolivia was documented using Landsat images from five epochs for all landscapes situated below the montane tree line at approximately 3000 m, including humid forest, inundated forest, seasonally dry forest, and cloud forest, as well as scrublands and grasslands. Deforestation in eastern Bolivia in 2004 covered 45,411 km2, representing approximately 9% of the...

2018
Shannon L. Savage Rick L. Lawrence John R. Squires Joseph D. Holbrook Lucretia E. Olson Justin D. Braaten Warren B. Cohen

There is a pressing need to map changes in forest structure from the earliest time period possible given forest management policies and accelerated disturbances from climate change. The availability of Landsat data from over four decades helps researchers study an ecologically meaningful length of time. Forest structure is most often mapped utilizing lidar data, however these data are prohibiti...

Journal: :Environmental management 2011
Carl E Zipper James A Burger Jeffrey G Skousen Patrick N Angel Christopher D Barton Victor Davis Jennifer A Franklin

Surface coal mining in Appalachia has caused extensive replacement of forest with non-forested land cover, much of which is unmanaged and unproductive. Although forested ecosystems are valued by society for both marketable products and ecosystem services, forests have not been restored on most Appalachian mined lands because traditional reclamation practices, encouraged by regulatory policies, ...

2009
Armando González-Cabán

González-Cabán, Armando. 2009. Proceedings of the third international symposium on fire economics, planning, and policy: common problems and approaches. Gen. Tech. Rep. PSW-GTR-227 (English). Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 395 p. These proceedings summarize the results of a symposium designed to address current issues of agencies ...

Journal: :Ecological applications : a publication of the Ecological Society of America 2007
K Norman Johnson Sally Duncan Thomas A Spies

The crisis in the early 1990s over conservation of biodiversity in the forests of the Pacific Northwest caused an upheaval in forest policies for public and private landowners. These events led to the development of the Coastal Landscape Assessment and Modeling Study (CLAMS) for the Coast Range Physiographic Province of Oregon, a province containing over two million hectares of forest with a co...

Journal: :Journal of medical ethics 1992
G Moran

SIR Your editorial in the March 1992 issue (1), is in my opinion something of a landmark and a positive, favourable one in the history of scholarly communication. In effect, you are urging the medical research community to take seriously a paper that leading peer review authorities rejected (for one reason or another) for publication. The peer review authority rejection might be characterised a...

2017

Generally, the change in global ecology issue will affect almost all the forest conditions such as forest area, health and biodiversity and may increase growth rates in some areas while endangering the survival of species and forest communities in some other areas. Forest ecosystems are impacted by multiple uses under the influence of global drivers. The need for providing environmental service...

2006
Joseph Wright Helene C. Muller-Landau

Deforestation and habitat loss are widely expected to precipitate an extinction crisis among tropical forest species. Humans cause deforestation, and humans living in rural settings have the greatest impact on extant forest area in the tropics. Current human demographic trends, including slowing population growth and intense urbanization, give reason to hope that deforestation will slow, natura...

Journal: :Folia primatologica; international journal of primatology 2015
Cora L Singleton Aimee M Norris Michelle L Sauther Frank P Cuozzo Ibrahim Antho Youssouf Jacky

The health of 36 wild, free-ranging ring-tailed lemurs (Lemur catta) at the Bezà Mahafaly Special Reserve was assessed across 2 habitats of varied human impact: a reserve riverine gallery forest, and a degraded mixed dry deciduous and Alluaudia-dominated spiny forest. While there were no statistically significant differences in leukocyte count or differential between habitats, female lemurs in ...

2006
S. Joseph Wright Helene C. Muller-Landau

Deforestation and habitat loss are widely expected to precipitate an extinction crisis among tropical forest species. Humans cause deforestation, and humans living in rural settings have the greatest impact on extant forest area in the tropics. Current human demographic trends, including slowing population growth and intense urbanization, give reason to hope that deforestation will slow, natura...

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