The Efficacy of Possum Control in Reducing Forest Dieback in the Otira and Deception Catchments, Central Westland
نویسندگان
چکیده
Science for Conservation presents the results of investigations contracted to science providers outside the Department of Conservation. Reports are subject to peer review within the Department and, in some instances, to a review from outside both the Department and the science providers. The Efficacy of possum control in reducing forest dieback in the Otira and Deception Catchments, Central Westland / M.
منابع مشابه
Magnitude of Canopy Dieback and Implications for Conservation of Southern Rata-kamahi (metrosideros Umbellata - Weinmannia Racemosa) Forests, Central Westland, New Zealand
The amount of conspicuous canopy dieback in all central Westland southern rata-kamahi forests east of the Alpine Fault, between 500 m altitude and treeline, was assessed and mapped from aerial photographs taken in 1984-85 and verified by aerial reconnaissance of selected areas in 1988. At least 20% of all canopy trees, predominantly southern rata (Metrosideros umbellata) and Hall's totara (Podo...
متن کاملCanopy Closure, a Factor in Rata (metrosideros)-kamahi (weinmannia) Forest Dieback in Westland, New Zealand
Increased dieback in Westland rata (Metrosideros umbellata) kamahi (Weinmannia racemosa) forests has been linked to the build-up of populations of the Australian brush-tailed possum (Trichosurus vulpecula). Within these forests young even-aged stands are observed to be more resilient to dieback than older stands. The effect of possum browsing on individual rata trees was related to the level of...
متن کاملThe Effect of Control of Brushtail Possums (trichosurus Vulpecula) on Condition of a Southern Rata/kamahi (metrosideros Umbellata/weinmannia Racemosa) Forest Canopy in Westland, New Zealand
Brushtail possums began colonising a rata/kamahi forest in the Taramakau catchment, Westland, about 1950 and by 1973 had caused widespread conspicuous canopy defoliation. They were poisoned in one block of this forest in 1970, at about the time they reached peak density, and again in 1974. In an adjacent block they were poisoned in 1974 only. A survey of forest canopy condition in 1985 showed t...
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During recent years, oak decline has been widely spread across Brant’s oak (Quercus Brantii Lindl.) stands in the Zagros Mountains, Western Iran, which caused large-area forest dieback in several sites. Mapping the intensity and spatial distribution of forest dieback is essential for developing management and control strategies. This study evaluated a range of geostatistical and interpolation m...
متن کاملThe Possum and Rata-Kamahi Dieback in New Zealand: A Review!
Browsing by the introduced Australian brush-tailed possum (Trichosurus vulpecula) has been generally accepted in New Zealand during the past 30 yr as the principal cause of damage to hardwood forests dominated by rata (Metrosideros spp.) and kamahi (Weinmannia racemosa). Recently, this view has been challenged, and assertions have been made that the forests in a North Island tract were in poor ...
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