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Filtering by: Creator Lewis, David Resource Type Dissertation

Managing the spatial configuration of land : the economics of land use and habitat fragmentation

Creator:

Lewis, David James

Abstract:

Habitat fragmentation has been widely studied in the biological literature and is considered a primary threat to biodiversity. However, there has been little research on land-use policies to reduce fragmentation. This dissertation focuses on two major research issues related to fragmentation policies. First, I develop an analytical model to analyze...

Resource Type:

Dissertation

Full Text:

David J. Lewis for the degree of Doctor of Philosophy in
Effects of pasture and management variables on forage intake by grazing sheep

Creator:

Lewis, Robert David

Abstract:

Grazing experiments were conducted in summer, autumn and winter to assess the effects of stock density, grazing duration, pre-grazing pasture mass and stock type on forage intake by sheep grazing at high stock densities for short durations. In summer and winter, sheep were stocked at 200 sheep/ha on 0.1 ha...

Resource Type:

Dissertation

Full Text:

David Lewis A THESIS submitted to Oregon State University in partial fulfillment of the requirements