نتایج جستجو برای: forest surveys

تعداد نتایج: 183820  

2014
Brian Allan Jose R Loaiza Matthew J Miller Meghan Radtke Montira J Pongsiri

Free-ranging ticks are widely known to be restricted to the ground level of vegetation. Here, we document the capture of the tick species Amblyomma in light traps placed in the forest canopy of Barro Colorado Island, tapirellum central Panama. A total of forty eight adults and three nymphs were removed from carbon dioxide–octenol baited CDC light traps suspended 20 meters above the ground durin...

2013
Jose R Loaiza Matthew J Miller Eldredge Bermingham Oris I Sanjur Patrick A Jansen Jose R Rovira Eric Alvarez Eric Rodriguez Philip Davis Larissa C Dutari James Pecor Desmond Foley Meghan Radtke Montira J Pongsiri Matias Pablo Juan Szabó Jose Loaiza Michael Levin Brian Allan Erin Welsh

Free-ranging ticks are widely known to be restricted to the ground level of vegetation. Here, we document the capture of the tick species Amblyomma tapirellum in light traps placed in the forest canopy of Barro Colorado Island, central Panama. A total of forty eight adults and three nymphs were removed from carbon dioxide-octenol baited CDC light traps suspended 20 meters above the ground durin...

Journal: :Journal of environmental monitoring : JEM 2004
Sebastiaan Luyssaert Mika Sulkava Hannu Raitio Jaakko Hollmén

This paper introduces the use of nutrition profiles as a first step in the development of a concept that is suitable for evaluating forest nutrition on the basis of large-scale foliar surveys. Nutrition profiles of a tree or stand were defined as the nutrient status, which accounts for all element concentrations, contents and interactions between two or more elements. Therefore a nutrition prof...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2010
Navjot S Sodhi David S Wilcove Tien Ming Lee Cagan H Sekercioglu R Subaraj Henry Bernard Ding Li Yong Susan L H Lim Dewi M Prawiradilaga Barry W Brook

There are few empirical data, particularly collected simultaneously from multiple sites, on extinctions resulting from human-driven land-use change. Southeast Asia has the highest deforestation rate in the world, but the resulting losses of biological diversity remain poorly documented. Between November 2006 and March 2008, we conducted bird surveys on six landbridge islands in Malaysia and Ind...

2015
Krishna Prasad Pokharel Tobias Ludwig Ilse Storch

Differential resource use allows a diversity of species to co-exist in a particular area by specializing in individual ecological niches. Four-horned antelope Tetracerus quadricornis is endemic to the Indian subcontinent and has a restricted distribution in Nepal and India; however, the barking deer Muntiacus vaginalis is relatively common throughout its wide distribution range. We wanted a bet...

Journal: :PLoS ONE 2006
David G. Haskell Jonathan P. Evans Neil W. Pelkey

Native forests are shrinking worldwide, causing a loss of biological diversity. Our ability to prioritize forest conservation actions is hampered by a lack of information about the relative impacts of different types of forest loss on biodiversity. In particular, we lack rigorous comparisons of the effects of clearing forests for tree plantations and for human settlements, two leading causes of...

2016

Bushmeat hunting is a pantropical threat to rainforest mammals. Understanding its effects on species richness, community composition and population abundance is of critical conservation relevance. As data on the pre-hunting state of mammal populations in Africa are not generally available, we evaluated the impacts of illegal bushmeat hunting on the mammal community of two ecologically similar f...

2012
Spencer T. Plumb Erik A. Nielsen Yeon-Su Kim

The REDD Programme is predicated on the assumption that developed countries will provide sufficient funds to offset opportunity costs associated with avoiding deforestation. The role of non-market values in indigenous land management may challenge the efficacy of compensation schemes targeted at meeting opportunity costs as calculated in traditional opportunity cost analysis (OCA). Furthermore ...

2007
G. W. Slaughter J. R. Parmeter

True fir stands in California (3.5 million acres) were surveyed during 1979-1980 to estimate the prevalence of infection by Heterobasidion annosum, and to determine stand and tree characteristics associated with the occurrence of annosus root disease. Approximately 4 percent (1.46 billion board-feet) of the live true firs were estimated to be infected by H. annosum; dead firs associated with th...

2000
V. Nijman

The Javan hawk-eagle (Spizaetus bartelsi) is a threatened raptor endemic to the densely populated island of Java. Historically very little is known about its biology. Recent surveys showed that the population size has been underestimated in the past. The breeding population is estimated to be 137±188 pairs with a total of 600±900 birds and con®rmed presence in 22 discrete forest blocks througho...

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