نتایج جستجو برای: forest surveys

تعداد نتایج: 183820  

M. Pourhashemi M. Zandebasiri P. Panahi

Acorn production plays a fundamental role in the organization and dynamics of oak forest ecosystems. Regarding acorn importance, visual survey methods have been used to estimate acorn production of oak species throughout the world. In this study, the mast indices of Brant`s oak (Quercus brantii Lindl.) were determined in a section of northern Zagros forests, almost 36 ha area, near Baneh, Kurdi...

Journal: :caspian journal of environmental sciences 2013
p. panahi m. pourhashemi m. zandebasiri

acorn production plays a fundamental role in the organization and dynamics of oak forest ecosystems. regarding acorn importance, visual survey methods have been used to estimate acorn production of oak species throughout the world. in this study, the mast indices of brant`s oak (quercus brantii lindl.) were determined in a section of northern zagros forests, almost 36 ha area, near baneh, kurdi...

2005
Robyn J. Burnham

One hectare of tropical dry forest in Guanacaste Conservation Area, Cosra Rica was mapped and all trees larger than 10 cm diameter at breast heighr (DBH) identified. The same hectare was sampled for leaf litter and the two data sets, forest and litter, were compared. Dominant and subdominant species of the forest are represented in the leaf litter, whereas rare tree species are highly variable ...

2015
Moses Azong Cho Oupa Malahlela Abel Ramoelo

Indigenous forest biome in South Africa is highly fragmented into patches of various sizes (most patches < 1 km). The utilization of timber and non-timber resources by poor rural communities living around protected forest patches produces subtle changes in the forest canopy which can be hardly detected on a timely manner using traditional field surveys. The aims of this study were to assess: (i...

Journal: :American journal of primatology 2012
Peter J Fashing Nga Nguyen Patrick Luteshi Winstone Opondo Julie F Cash Marina Cords

As natural forest cover declines, planted forests have come to occupy an increasing percentage of the earth's surface, yet we know little about their suitability as alternative habitat for wildlife. Although some primate species use planted forests, few studies have compared primate populations in natural and nearby planted forests. From March 2006 to July 2010, we conducted line transect surve...

2013
Michael Padmanaba Douglas Sheil Imam Basuki Nining Liswanti

Conventional biodiversity surveys play an important role in ensuring good conservation friendly management in tropical forest regions but are demanding in terms of expertise, time, and budget. Can local people help? Here, we illustrate how local knowledge can support low cost conservation surveys. We worked in the Malinau watershed, East Kalimantan, Indonesia, an area currently at risk of exten...

2008
L. T. Waser H. Eisenbeiss M. Kuechler E. Baltsavias

This study presents a methodology for derivation of fractional canopy cover, detection of main tree species, and extraction of forest stands using logistic regression, airborne remote sensing data and field samples. In a first step, canopy height models (CHMs) are generated using medium point density LiDAR DSM and DTM and a high-quality matching DSM. Then, fractional canopy covers are calculate...

2009
Nobuo Imai Hiromitsu Samejima Andreas Langner Robert C. Ong Satoshi Kita Jupiri Titin Arthur Y. C. Chung Peter Lagan Ying Fah Lee Kanehiro Kitayama

BACKGROUND Sustainable forest management (SFM), which has been recently introduced to tropical natural production forests, is beneficial in maintaining timber resources, but information about the co-benefits for biodiversity conservation and carbon sequestration is currently lacking. METHODOLOGY/PRINCIPAL FINDINGS We estimated the diversity of medium to large-bodied forest-dwelling vertebrate...

2001
ALBERT CHALLIER

Ecological surveys were carried out to assess the population characteristics and epidemiological importance of Glossina palpalis palpalis (Rob-Desv.), 1830 in the human trypanosomiasis focus of Vavoua in the forest zone of Ivory Coast. G. p. pulpalis was widespread in all components of the ecosystem: forest, interstitial savannahs, coffee plantations, tracks and villages. Most flies were caught...

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