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Displaying 911 - 915 of 1605Land use and hydroclimatic influences on Faecal Indicator Organisms in two large Scottish catchments: Towards land use-based models as screening tools
Faecal Coliform (FC) bacteria were used as Faecal Indicator Organisms (FIOs) for assessment of microbiological pollution risk in two large, mixed land use catchments in Scotland. FC counts varied spatially in relation to land use and human population and resulting trophic status. These were highest in catchments with a high cover of improved pasture (which was assumed to be a proxy for cattle and sheep grazing densities) and significant human populations. FC counts were lowest in oligotrophic upland areas, where domesticated animal populations were low.
Land use changes, landscape ecology and their socioeconomic driving forces in the Spanish Mediterranean coast (El Maresme County, 1850–2005)
A set of landscape metrics is used to study the long-term environmental transformation of a typical coastal Mediterranean area from 1850 to 2005. Our figures show a dramatic environmental deterioration between 1950 and 2005. The main proximate drivers of this landscape degradation are the effects of urban sprawl on former agricultural areas located in the coastal plains, together with the abandonment and reforestation of hilly slopes intercepted by low-density residential areas, highways, and other linear infrastructures.
Does watershed size affect simple mathematical relationships between flow velocity and discharge rate at watershed outlets on the Loess Plateau of China
An empirical power function model of V=kQᵐ has been used worldwide to describe the relationship between flow velocity (V, ms⁻¹) and discharge rate (Q, m³s⁻¹) for rill and open channel flows. However, it has seldom been applied to watershed outlet channels taking into account the impacts of watershed size. In this study, observed data from four experimental watersheds of different sizes, ranging from about 1 to 100km², were used to verify the stability of the power function model for use at a watershed level on the Loess Plateau.
Traditional forest knowledge of the Yi people confronting policy reform and social changes in Yunnan province of China
The Yi minority group has a long history, and their livelihoods and culture exist in complex, holistic interrelationship with forests. This paper aims to document the dynamic, traditional forest knowledge (TFK) of the Yi, including: forest categorization methods; routine forest utilization; land tenure and use-right arrangements; benefit-sharing mechanisms; customary regulations; and forest-related beliefs. Our analysis is based on rapid investigations conducted in two dozen Yi ‘natural villages’ and in-depth studies of three Yi natural villages in Nanhua County, Yunnan.
Consider the source: The impact of media and authority in outreach to private forest and rangeland owners
Over half of the United States is privately owned. Improving environmental sustainability requires that the scientific and management communities provide effective outreach to the many landowners making decisions about land use and management practices on these lands. We surveyed California forest and rangeland owners in ten counties throughout the state to assess the impact of existing outreach and identify gaps in information distribution and content.