Movement of Larval Desmognathus Quadramaculatus in Linear and Connected Habitats
Author : Scott Lee Freeman
Publisher :
Page : 320 pages
File Size : 46,16 MB
Release : 2003
Category :
ISBN :
Author : Scott Lee Freeman
Publisher :
Page : 320 pages
File Size : 46,16 MB
Release : 2003
Category :
ISBN :
Author : Linda Elaine Green
Publisher :
Page : 328 pages
File Size : 20,57 MB
Release : 2006
Category :
ISBN :
Author :
Publisher :
Page : 812 pages
File Size : 22,50 MB
Release : 2003
Category : Dissertations, Academic
ISBN :
Author : Bo Ebenman
Publisher : Springer Science & Business Media
Page : 288 pages
File Size : 46,58 MB
Release : 2012-12-06
Category : Science
ISBN : 3642740014
At last both ecology and evolution are covered in this study on the dynamics of size-structured populations. How does natural selection shape growth patterns and life cycles of individuals, and hence the size-structure of populations? This book will stimulate biologists to look into some important and interesting biological problems from a new angle of approach, concerning: - life history evolution, - intraspecific competition and niche theory, - structure and dynamics of ecological communities.
Author : EMMETT REID. DUNN
Publisher :
Page : 0 pages
File Size : 24,30 MB
Release : 2018
Category :
ISBN : 9781033717820
Author : Ulrich Sommer
Publisher : Springer Science & Business Media
Page : 232 pages
File Size : 21,17 MB
Release : 2012-12-06
Category : Science
ISBN : 3642561667
The question "Why are there so many species?" has puzzled ecologist for a long time. Initially, an academic question, it has gained practical interest by the recent awareness of global biodiversity loss. Species diversity in local ecosystems has always been discussed in relation to the problem of competi tive exclusion and the apparent contradiction between the competitive exclu sion principle and the overwhelming richness of species found in nature. Competition as a mechanism structuring ecological communities has never been uncontroversial. Not only its importance but even its existence have been debated. On the one extreme, some ecologists have taken competi tion for granted and have used it as an explanation by default if the distribu tion of a species was more restricted than could be explained by physiology and dispersal history. For decades, competition has been a core mechanism behind popular concepts like ecological niche, succession, limiting similarity, and character displacement, among others. For some, competition has almost become synonymous with the Darwinian "struggle for existence", although simple plausibility should tell us that organisms have to struggle against much more than competitors, e.g. predators, parasites, pathogens, and envi ronmental harshness.
Author : Rebecca K. Smith
Publisher : Pelagic Publishing Ltd
Page : 273 pages
File Size : 30,80 MB
Release : 2014-05-16
Category : Nature
ISBN : 178427027X
Amphibian Conservation is the fourth in the series of Synopses of Conservation Evidence, linked to the online resource www.ConservationEvidence.com. This synopsis is part of the Conservation Evidence project and provides a useful resource for conservationists. It forms part of a series designed to promote a more evidence-based approach to biodiversity conservation. Others in the series include bee, bird, farmland and bat conservation and many others are in preparation. Approximately 32% of the 7,164+ amphibian species are currently threatened with extinction and at least 43% of species are declining. Despite this, until recently amphibians and their conservation had received little attention. Although work is now being carried out to conserve many species, often it is not adequately documented. This book brings together and summarises the available scientific evidence and experience relevant to the practical conservation of amphibians. The authors consulted an international group of amphibian experts and conservationists to produce a thorough summary of what is known, or not known, about the effectiveness of amphibian conservation actions across the world. "The book is packed with literature summaries and citations; a veritable information goldmine for graduate students and researchers. It also admirably provides decision makers with a well-researched resource of proven interventions that can be employed to stem/reverse the decline of amphibian populations." -John G Palis, Bulletin of the Chicago Herpetological Society
Author : Michael J. Lannoo
Publisher : Univ of California Press
Page : 1124 pages
File Size : 44,18 MB
Release : 2005-06-15
Category : Nature
ISBN : 9780520235922
Documents in comprehensive detail a major environmental crisis: rapidly declining amphibian populations and the disturbing developmental problems that are increasingly prevalent within many amphibian species.
Author : Roy W. McDiarmid
Publisher : Univ of California Press
Page : 424 pages
File Size : 19,24 MB
Release : 2012-01-10
Category : Nature
ISBN : 0520266714
“Authoritative and comprehensive—provides an up-to-date description of the tool box of methods for inventorying and monitoring the diverse spectrum of reptiles. All biodiversity scientists will want to have it during project planning and as study progresses. A must for field biologists, conservation planners, and biodiversity managers.”—Jay M. Savage, San Diego State University “Kudos to the editors and contributors to this book. From the perspective of a non-ecologist such as myself, who only occasionally needs to intensively sample a particular site or habitat, the quality and clarity of this book has been well worth the wait.”—Jack W. Sites, Jr.
Author : Gerald W. Esch
Publisher : Springer Science & Business Media
Page : 397 pages
File Size : 18,81 MB
Release : 2012-12-06
Category : Science
ISBN : 9400908377
We first discussed the possibility of organizing a symposium on helminth communities in June, 1986. At that time, we were engaged in writing a joint paper on potential structuring mechanisms in helminth communities; we disagreed on a number of issues. We felt the reason for such debate was because the discipline was in a great state of flux, with many new concepts and approaches being introduced with increasing frequency. After consider able discussion about the need, scope and the inevitable limitations of such a symposium, we decided that the time was ripe to bring other ecologists, engaged in similar research, face-to-face. There were many individuals from whom to choose; we selected those who were actively publishing on helminth communities or those who had expertise in areas which we felt were particularly appropriate. We compiled a list of potential participants, contacted them and received unanimous support to organize such a symposium. Our intent was to cover several broad areas, fully recognizing that breadth negates depth (at least with a publisher's limitation on the number of pages). We felt it important to consider patterns amongst different kinds of hosts because this is where we had disagreed among ourselves.