Results 171 to 180 of about 612 (213)
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1999
Abstract The early 1970s saw many new reports of large herds of crown—of—thorns starfish and devastation of coral—reefs in widespread localities, from the Indian Ocean to Fiji, Tahiti, New Guinea, the Philippines, the Ryukyu Is lands in Japan, as well as the Great Barrier Reef and Micronesia.
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Abstract The early 1970s saw many new reports of large herds of crown—of—thorns starfish and devastation of coral—reefs in widespread localities, from the Indian Ocean to Fiji, Tahiti, New Guinea, the Philippines, the Ryukyu Is lands in Japan, as well as the Great Barrier Reef and Micronesia.
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Computer-aided choice of trees for felling
Forest Ecology and Management, 2001Abstract The choice of trees when partially cutting multi-storied stands is often dictated by the requirements of natural regeneration, and historically researchers have focused on preserving a decreasing diameter frequency distribution. In this study, however, a strictly economic system is presented, whereby the present value (the discounted value ...
Mats Hagner +2 more
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Felling the Forest for the Trees?
2000In the last chapter, we looked at the relevance of impoverishment and population growth as two theoretically related explanations for deforestation introduced in Chapter 2. This chapter will consider two additional factors: timber demand and the `fuelwood trap’. To what degree is the forest felled and converted for its tree resources?
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The Felled Tree Trunk as an Ecological Unit
Ecology, 1925When we speak today of ecological environments we usually think of extensive geographic or formational units. This is a very natural attitude in a comparatively new field, such as ecology, where many of the broader aspects of the science are still almost unexplored.
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A Tree Harvesting Attachment for Felling and Bunching
SAE Technical Paper Series, 1975<div class="htmlview paragraph">A logging attachment for felling and bunching full trees has been developed and is now being utilized for mechanized harvesting. The attachment allows an operator full control to sever, position, and lay trees into desired bunches so they can be easily skidded out of the forest for loading and transport.</div>
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