نتایج جستجو برای: forest surveys

تعداد نتایج: 183820  

2015
Grace V. Blackham Richard T. Corlett

Forested tropical peatlands in Southeast Asia are being rapidly converted to agriculture or degraded into non-forest vegetation. Although large areas have been abandoned, there is little evidence for subsequent forest recovery. As part of a study of forest degradation and recovery, we used seed removal experiments and rodent surveys to investigate the potential role of post-dispersal seed preda...

2018
Arne Arnberger Martin Ebenberger Ingrid E. Schneider Stuart Cottrell Alexander C. Schlueter Eick von Ruschkowski Robert C. Venette Stephanie A. Snyder Paul H. Gobster

Extensive outbreaks of tree-killing insects are increasing across forests in Europe and North America due to climate change and other factors. Yet, little recent research examines visitor response to visual changes in conifer forest recreation settings resulting from forest insect infestations, how visitors weigh trade-offs between physical and social forest environment factors, or how visitor ...

Journal: :Remote Sensing 2016
Jinghui Meng Shiming Li Wei Wang Qingwang Liu Shiqin Xie Wu Ma

Forest health is an important variable that we need to monitor for forest management decision making. However, forest health is difficult to assess and monitor based merely on forest field surveys. In the present study, we first derived a comprehensive forest health indicator using 15 forest stand attributes extracted from forest inventory plots. Second, Pearson’s correlation analysis was perfo...

Journal: :Environmental management 2016
Jared R Stapp Robert J Lilieholm Jessica Leahy Suraj Upadhaya

Deforestation in Nepal threatens the functioning of complex social-ecological systems, including rural populations that depend on forests for subsistence, as well as Nepal's biodiversity and other ecosystem services. Nepal's forests are particularly important to the nation's poorest inhabitants, as many depend upon them for daily survival. Two-thirds of Nepal's population relies on forests for ...

2006
G. A. Zurita N. Rey M. Villagra M. I. Bellocq

In the current scenario of a fragmented Atlantic Forest, with less than 7% of the original cover remaining, the dominant agricultural and agroforestal matrices should be incorporated into conservation planning. However, little information is available on the conservation value of different land uses, especially those of commercial tree plantations. We studied bird communities in native forests ...

Journal: :Neotropical entomology 2009
Douglas C Giangarelli Gabriele A Freiria Olavo P Colatreli Karen M Suzuki Silvia H Sofia

Eufriesea violacea (Blanchard) is a very seasonal euglossine species, more frequently found in the southern and southeastern regions of Brazil. A number of studies have revealed large variations in the abundance of males of this species present in Atlantic Forest remnants throughout both regions. In this paper, we report variations in the abundance of E. violacea males sampled in several forest...

Journal: :Folia primatologica; international journal of primatology 2007
Shawn M Lehman

I present data on variations in Eulemur fulvus rufus and Lepilemur mustelinus densities as well as tree characteristics (height, diameter and stem frequency) between edge and interior forest habitats in southeastern Madagascar. Line transect surveys were conducted from June 2003 to November 2005 in edge and interior forest habitats in the Vohibola III Classified Forest. Although E. f. rufus den...

Journal: :Neotropical entomology 2009
Claus Rasmussen

Euglossine bee males are easily lured to chemical baits imitating natural fragrances gathered by bees, providing a widely applied measure for estimating the diversity and abundance of euglossines. In here, I report the composition of euglossine bees in three lowland rainforest habitats of Peru, a primary old forest, a reforested and managed forest, and a very disturbed forest. A total of 2,072 ...

2000
Linwood Pendleton Brent Sohngen Robert Mendelsohn Thomas Holmes

This study presents a method for valuing recreational environmental quality in the forests of the southeastern United States. The paper offers a method for choosing, measuring, and valuing forest attributes. Surveys and popular recreation literature are used to identify forest attributes that contribute to recreational quality. Standard ecological techniques are employed to measure levels of th...

Journal: :Remote Sensing 2009
Veerachai Tanpipat Kiyoshi Honda Prayoonyong Nuchaiya

To ensure remote sensing MODIS hotspot (also known as active fire products or hotspots) quality and precision in forest fire control and management in Thailand, an increased level of confidence is needed. Accuracy assessment of MODIS hotspots utilizing field survey data validation is described. A quantitative evaluation of MODIS hotspot products has been carried out since the 2007 forest fire s...

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