Compositions of some granitoid rocks from Westland, New Zealand
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چکیده
منابع مشابه
Forest Instability and Canopy Tree Mortality in Westland, New Zealand!
Many researchers in New Zealand have accepted equilibrium models of vegetation change that assume within-stand self-replacement of the dominant tree species as the norm. Consequently, many discontinuous stand structures have been used as evidence of forest instability. For example, the patterns of regeneration and mortality in the rata-kamahi forests of Westland have led many to believe that th...
متن کاملNative nickel from the Jerry River, South Westland, New Zealand: an example of natural refining
Native nickel of composition Ni 96"3 ~, Fe 1"77 ~, and Co 0'69 ~ was found as tiny flakes up to o'75 mm across in a heavy mineral concentrate from stream sediments in the Jerry River, South Westland, New Zealand. The locality is approximately I3 km downstream from the original locality for awaruite (Ni~Fe), and it is shown that the nickel content of detrital grains increases with distance from ...
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 کاملImpact of cattle on conservation land licensed for grazing in South Westland, New Zealand
Making use of existing fences as ready-made exclosures, this study aimed to assess the long-term effects of cattle grazing on forest margins. Results indicated: 1) that cattle browsing and trampling has an impact on vegetation species composition, structure and regeneration; 2) that the effects of a particular grazing regime may take many decades to dissipate; and 3) that the impacts of cattle ...
متن کاملDistribution and diet of chamois (Rupicapra rupicapra) in Westland forests, South Island, New Zealand
Chamois (Rupicapra rupicapra) are usually considered an alpine species in New Zealand, but also occur in forests in areas such as Westland. A postal survey of commercial helicopter-based hunters indicated that chamois are present within Westland forests from timberline to sea level and are most abundant within an area of about 1600 km extending from the Wanganui River in the north to the Karang...
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ژورنال
عنوان ژورنال: Journal of the Royal Society of New Zealand
سال: 1989
ISSN: 0303-6758,1175-8899
DOI: 10.1080/03036758.1989.10426455