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Author: Bruce Leigh Welch
Publisher:
ISBN:
Category : Abies grandis
Languages : en
Pages : 136
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Book Description
Author: Bruce Leigh Welch
Publisher:
ISBN:
Category : Abies grandis
Languages : en
Pages : 136
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Book Description
Author: Kathleen Geier-Hayes
Publisher:
ISBN:
Category : Abies grandis
Languages : en
Pages : 52
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Book Description
Author: David N. Cole
Publisher:
ISBN:
Category : Erosion
Languages : en
Pages : 716
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Author:
Publisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 242
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Book Description
Author: Scott Ferson
Publisher: Springer Science & Business Media
ISBN: 0387226486
Category : Science
Languages : en
Pages : 334
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Book Description
Quantitative methods are needed in conservation biology more than ever as an increasing number of threatened species find their way onto international and national “red lists. ” Objective evaluation of population decline and extinction probability are required for sound decision making. Yet, as our colleague Selina Heppell points out, population viability analysis and other forms of formal risk assessment are underused in policy formation because of data uncertainty and a lack of standardized methodologies and unambiguous criteria (i. e. , “rules of thumb”). Models used in conservation biology range from those that are purely heuristic to some that are highly predictive. Model selection should be dependent on the questions being asked and the data that are available. We need to develop a toolbox of quantitative methods that can help scientists and managers with a wide range of systems and that are subject to varying levels of data uncertainty and environmental variability. The methods outlined in the following chapters represent many of the tools needed to fill that toolbox. When used in conjunction with adaptive management, they should provide information for improved monitoring, risk assessment, and evaluation of management alternatives. The first two chapters describe the application of methods for detecting trends and extinctions from sighting data. Presence/absence data are used in general linear and additive models in Chapters 3 and 4 to predict the extinction proneness of birds and to build habitat models for plants.
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 932
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1100
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Author: Muthukumara Mani
Publisher: World Bank Publications
ISBN: 1464811563
Category : Business & Economics
Languages : en
Pages : 120
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Book Description
South Asia is particularly vulnerable to climate change. Most previous studies have focused on the projected impacts of sea-level rise or extreme weather - droughts, floods, heatwaves and storm surges. This study adds to that knowledge by identifying the impacts of long-term changes in the climate †“ rising temperatures and changes in precipitation patterns †“ on living standards. It does so by first building an understanding of the relationship between current climate conditions and living standards across South Asia. The study also identifies the set of climate models that are best suited for projecting long-term changes in climate across South Asia. This novel understanding of living standards and climate change is then combined to project impacts of long-term changes in climate on living standards in South Asia. The study finds that higher temperatures will reduce living standards for most of South Asia, with the severity impacts depending on future global greenhouse gas emissions. The study projects “hotspots†?, which are locations where long-term changes in climate will have negative impacts on living standards. Many hotspots are in locations that hitherto have not been identified as particularly vulnerable to climate change. Moreover, hotspots have distinguishing features that vary from country to country. This detailed assessment provides a mosaic of information that enriches our understanding of how climate change will impact people and which populations are most vulnerable. The report also provides guidance on the kinds of actions are most likely to reduce impacts of climate change in each country. The study is a major contribution to our understanding of how increasing temperatures and changing precipitation patterns interact with social and economic structures at a fine granular level across South Asia.
Author: Fernando Álvarez
Publisher: Springer
ISBN: 3030112624
Category : Science
Languages : en
Pages : 231
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Book Description
This volume investigates the contemporary fauna that inhabit the Cuatro Ciénegas Basin. Divided into 15 chapters, it addresses and describes their diversity, taxonomic and biogeogaphic affinities, and ecological characteristics. The Cuatro Ciénegas Valley is a unique oasis in the south-central region of the State of Coahuila, part of the Sonoran Desert, in Mexico. Several clues, specially derived from the study of the microbiota, suggest a very ancient origin of the valley and its permanence through time. This condition had promoted a high level of endemism and led to unique interactions between the resident species.
Author: Alejandro Casas
Publisher: Frontiers Media SA
ISBN: 2889630471
Category :
Languages : en
Pages : 284
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Book Description
The Neotropical area is a main setting of the earliest experiences of domestication ofplants, and evolutionary processes guided by humans, which continue being active inthe area. Studies comprised in this Research Topic show a general panorama aboutsimilarities and particularities of processes of domestication for different plant groupsand regions, some of them illustrate how the domestication processes originated anddiffused, how landscape domestication has operated and continues being practicedand others discuss some of the main challenges for designing policies for biosafetyand conservation of plant genetic resources. It is an attempt to identify main topicsfor research on evolution under domestication, and opportunities that researcherscan find in the Neotropics to understand how and why these processes occurredin the past and present.
