نتایج جستجو برای: dalab woodlands
تعداد نتایج: 1978 فیلتر نتایج به سال:
Cork oak landscapes are fascinating ecosystems, historically managed for cork extraction. The persistence in this habitat of many hollow veteran trees provides suitable micro-habitats saproxylic beetles. We investigated the beetle community two isolated woodlands central Italy with different degree recovery after human transformation: (1) an open woodland and (2) a dense mixed woodland, both do...
1Department of Endocrinology, Central Manchester University Hospitals Foundation Trust, Manchester Royal Infirmary, Manchester, UK 2Leeds General Infirmary, Leeds Teaching Hospitals NHS Trust, Blood Sciences, Leeds, UK 3Department of Endocrinology, University Hospitals of Leicester, Leicester Royal Infirmary, Leicester, UK 4The Society for Endocrinology, 22 Apex Court, Woodlands, Bradley Stoke,...
1The Mellanby Centre for Bone Research, The Medical School, The University of Sheffield, Sheffield, UK 2Centre for Endocrinology, Diabetes and Metabolism, University Hospitals Birmingham & University of Birmingham, Birmingham Health Partners, Birmingham, UK 3Department of Medicine, Manchester Royal Infirmary, Manchester, UK 4The Society for Endocrinology, 22 Apex Court, Woodlands, Bradley Stoke...
7.6.1Introduction................................................. 7.6.2 Ecosystem Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.6.3 Pollutant Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.6.4 Pollutant Behaviour. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
In terms of adult tree mortality, harvesting is the most prevalent disturbance in northeastern United States forests. Previous studies have demonstrated that stand structure and tree species composition are important predictors of harvest. We extend this work to investigate how social factors further influence harvest regimes. By coupling the Forest Inventory and Analysis database to U.S. Censu...
A mathematical policy model of oak woodlands is presented. The model illustrates the policy uncertainties that exist in the management of oak woodlands. These uncertainties include: (1) selection of a policy criterion function, (2) woodland dynamics, (3) initial and final state of the woodland stock. The paper provides a review of each of the uncertainty issues. The final section of the paper d...
Managers of protected natural areas increasingly are confronted with novel ecological conditions and conflicting objectives to preserve the past while fostering resilience for an uncertain future. This dilemma may be pronounced at range peripheries where rates of change are accelerated and ongoing invasions often are perceived as threats to local ecosystems. We provide an example from City of R...
Although the distribution and structure of pinyon-juiper woodlands in the southwestern United States are thought to be the result of historic fluctuations in regional climatic conditions, more recent increases in the areal extent, tree density, soil erosion rates and loss of understory plant diversity are attributed to heavy grazing by domestic livestock and interruption of the natural fire reg...
The key to simulating soil erosion is to calculate the vegetation cover (C) factor. Methods that apply remote sensing to calculate the C factor at a regional scale cannot directly use the C factor formula. That is because the C factor formula is obtained by experiments, and needs the coverage ratio data of croplands, woodlands, and grasslands at a standard plot scale. In this paper, we present ...
Fire is an important management tool for both hazard reduction burning and maintenance of biodiversity. The impact of time since last fire on fauna is an important factor to understand as land managers often aim for prescribed burning regimes with specific fire-free intervals. However, our current understanding of the impact of time since last fire on fauna is largely unknown and likely depende...
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