نتایج جستجو برای: conservation and restoration
تعداد نتایج: 16850594 فیلتر نتایج به سال:
The scientific discipline of active restoration of denuded coral reef areas has drawn much attention in the past decade as it became evident that this ecosystem does not often recover naturally from anthropogenic stress without manipulation. Essentially, the choices are eitherthe continuous degradation of the reefs or active restoration to encourage reef development. As a result, worldwide rest...
An increased understanding of the current and potential future impacts of climate change has significantly influenced conservation in practice in recent years. Climate change has necessitated a shift toward longer planning time horizons, moving baselines, and evolving conservation goals and targets. This shift has resulted in new perspectives on, and changes in, the basic approaches practitione...
UNLABELLED Flooding is the most common and damaging of all natural disasters in the United States, and was a factor in almost all declared disasters in U.S. HISTORY Direct flood losses in the U.S. in 2011 totaled $8.41 billion and flood damage has also been on the rise globally over the past century. The National Flood Insurance Program paid out more than $38 billion in claims since its incep...
As the influence of human activities on natural systems continues to expand, there is a growing need to prioritize not only pristine sites for protection, but also degraded sites for restoration. We present an approach for simultaneously prioritizing sites for protection and restoration that considers landscape patterns for a threatened population of grizzly bears (Ursus arctos) in southwestern...
The Pacific islands off southern California, U.S.A. and Baja California, Mexico hold potential for the conservation and restoration of California Mediterranean coastal ecosystems. However, the presence of exotic herbivores and invasive plants pose threats to these systems. Here, we use introduced herbivore removal as a large-scale experimental manipulation to examine the importance of topdown a...
CONTENTS 3.1 Temperate Region Soil Differences .................................................................................. 28 3.2 Challenges to Soil Fertility and Management................................................................ 29 3.2.1 Soil Organic Matter Restoration and Conservation.......................................... 30 3.2.2 High Nutrient-Use Efficiency .................
Effective conservation of native biodiversity on islands often requires the eradication of destructive non-native vertebrates. There are risks in conducting an eradication project, however, including the risk that the effort will fail to remove all the individuals, and the risk that the removal of the species will trigger ecological cascades with unanticipated and undesired consequences. Manage...
The growth of urban populations in recent decades requires physical elements such as residential, commercial and cultural spaces and the development of infrastructure such as streets and highways, which will open a new horizon to the historic texture of cities and how to preserve and restore them. The development of new urban textures along with the lack of attention to the historic texture and...
“OF MAKING MANY BOOKS THERE IS NO END,” writes the biblical author of Ecclesiastes—and so it seems that of the making of many international heritage conventions, principles, and guidelines there also seems to be no end in sight. Beginning with the 1931 Athens Charter for the Restoration of Historic Monuments, through the 1964 Venice Charter, and continuing with the recent adoption of the 2003 I...
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