Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"selective logging"”.
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Impacts of selective logging on tropical butterflies in Sabah, Malaysia
This study investigated the impacts of selective logging on tropical butterflies in the lowland dipterocarp rainforest of Sabah (Malaysia, Borneo). Walk and point-count transect methods were used to survey butterflies in unlogged forest and forest that had been selectively logged 10-11 years …
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Responses of fruit-feeding butterflies to selective logging in Sabah, Borneo
This study investigated the impacts of selective logging on tropical butterflies in lowland dipterocarp rainforest of Sabah, Malaysia (Borneo). Fruit-baited traps were used to survey butterflies in unlogged forest and forest that had been selectively logged 10 - 12 years previously in 1988 and …
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The economic and ecological sustainability of the Amazonian timber industry
Abstract Selective logging of tropical forests, particularly reduced impact logging (RIL), has long been suggested as a benign compromise between profitable land-use and biodiversity conservation. Throughout human history, slow-renewal biological resource populations have been predictably …
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Ecology of ragadia makuta (lepidoptera: satyrinae) in tropical rainforests of Sabah, Malaysia.
… types, unlogged forest and forest that had been selectively logged 10 to 11 years previously. THe primary aim was to investigate the effects of selective logging on R. makuta abundance and distribution. Transect walk-and-count and point sampling techniques were used to record satyrinae, morphinae …
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Ecology of stingless bees (Apidae, Meliponini) in lowland dipterocarp forests in Sabah, Malaysia, and an evaluation of logging impact on populations and communities
… it was the main focus to evaluate the effect of selective logging for timber extraction on communities of bees, and to elucidate causative relationships involved in regulating bee populations. Included were background studies on resource use (3.1, 3.2, 3.3) and nesting biology (3.4) as well as …
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Evaluating dry woodlands degradation and on-farm tee management in kenyan drylands
… inhabitants turn to charcoal production through selective logging of preferred hardwood species for their livelihood support. This places the already fragile dryland ecosystem under risk of degradation, further impacting negatively on the lives of the inhabitants. The main objective of the …
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An experimental analysis of nest predation in eastern deciduous forests
… marker, and forest age since recovery from selective logging) had no significant effects on nest predation levels. The high heterogeneity of predation levels and our lack of knowledge of nest predators' behavior makes testing of hypotheses difficult.
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The effects of tropical forest management on biodiversity and ecosystem functioning
… in logged forests. The effects of different logging intensities on a variety of taxa, and the ecosystem processes with which they are associated, were assessed in the Danum Valley Conservation Area in Sabah (Malaysian Borneo). 3. Even under high logging intensities, the forests of Sabah …
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The effects of forest disturbance and fragmentation on fruit-feeding butterflies in Trinidad
… in significantly greatest abundance in 30 year selectively logged forest, even though canopy openness was not significantly different from that found in 5 year forest. Conversely, <i>Colobura dirce</i> (Nymphalidae: Nymphalinae) was found in greatest abundance in the O and 5 year forest and …
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Forest stucture and group density of Thomas' langur monkey, Presbytis thomasi.
… services. Anthropogenic activities such as logging and agriculture alter the physical structure of forests and thus impact arboreal primates through altered availability of food and suitable sleeping sites and reduced ability to move through the forest canopy. There are many studies …
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Vegetation distribution and site relationships in an Appalachian oak forest in southwest Virginia
… to presettlement forests may be attributed to selective logging practices and to the demise of American chestnut.
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Determining habitat and biotic factors driving puma (<i>Puma concolor</i>) space use and underlying dynamic processes (colonization and extinction) over 20 years in protected and private areas throughout Belize, Central America
… generally had higher occupancy, even in areas of selective logging, however there are no other multi-season studies to compare. While sites with heavy human impacts had lowest occupancy, these areas are still used and likely serve as steppingstones between protected areas of higher occupancy. Such …
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Biodiversity-ecosystem service relationships in degraded and recovering ecosystems.
… loss and species richness change following selective logging? 5. After deforestation how long do carbon stocks and plant biodiversity take to recover in tropical forests? 6. Do carbon and plant biodiversity differ in their recovery rates? 7. Which areas are priorities for restoration of …
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The biodiversity and climate impacts of alternative approaches to meeting demands for tropical timber and forest restoration
… on forest species and the climate through selective logging and the development of intensive tree plantations. Second is the restoration of large tracts of degraded lands in order to recover ecosystem services and biodiversity and support livelihoods. Both timber production and restoration …
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The effects of forest degradation on arboreal apes within Sikundur, the Gunung Leuser Ecosystem, Northern Sumatra.
… to a greater understanding of the effects of selective logging and climate change on tropical forests, vegetation structure and climate change on primate behaviour and ranging, and sheds light on the prospect of primate species survival in the face of anthropogenic disturbance. Additionally, …
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The effects of habitat disturbance, host traits, and host physiology on patterns of gastrointestinal parasite infection in black howler monkeys (Alouatta pigra)
… human presence linked to wood extraction and selective logging, can alter host-parasite dynamics and increase the risk of infectious diseases in wild primates. However, little is known regarding the proximate ecological factors that drive this relationship, and whether such effects are …
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An active spatial database for the multi-scaling of the National Park of Azagny's geographic data
… deforestation was not a clear-cut issue. Selective logging and agriculture left many unexploited (or more or less degraded) areas of different sizes that still stand in the landscape. Regeneration within and outside of protected areas still occurs. Nonetheless, the country’s authorities …
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The butterfly community of a managed West African rainforest: patterns of habitat specificity, diversity, stratification and movement.
Mit Hilfe von Köderfallen, standardisierten Transektbegehungen und Point Distance Sampling wurde die Tagfalterzönose eines nach starkem Holzeinschlag bewirtschafteten Regenwaldes im südöstlichen Côte d"Ivoire, Westafrika, untersucht. Die Untersuchungsfläche innerhalb des 22.000 ha großen …