Spatiotemporal variation in the demography of perennial plants PDF Download
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Author: Matthias Schleuning
Publisher:
ISBN:
Category :
Languages : de
Pages : 0
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Author: Matthias Schleuning
Publisher:
ISBN:
Category :
Languages : de
Pages : 0
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Author:
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Category :
Languages : en
Pages :
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A major goal of ecological research is to understand how plant populations respond to spatial and temporal variation in environmental conditions. Short-lived species rapidly respond to changes in habitat conditions, but little is known about the effects on the population dynamics of long-lived plants. I analyzed the effects of varying habitat conditions on the population dynamics of two herbaceous perennials. One of the plants, Trifolium montanum, grows in nutrient-poor grasslands in a semi-natural landscape of central Europe, while the other plant, Heliconia metallica, grows in lowland rainforests in Amazonian Peru. During the last decades, changes in land use have resulted in a considerable loss of nutrient-poor grasslands in central Europe. I studied the effects of habitat degradation and fragmentation on the dynamics of the populations of the declining perennial plant Trifolium montanum L. in central Germany using matrix models. To assess the habitat quality in a site, I measured the leaf area index (LAI). The finite growth rate of a population strongly decreased with LAI. In unmanaged sites, population growth was
Author: Christy A. Brigham
Publisher: Springer Science & Business Media
ISBN: 3662093898
Category : Science
Languages : en
Pages : 370
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Providing a quantitative assessment of threatened plant populations, that holds for varying management scenarios, has become an essential part of conservation planning. Here, renowned plant ecologists provide information on: major threats to plants, when and where to conduct a plant viability assessment (PVA), what type of PVA to conduct, what alternative options to PVA are available, what information is required for which kind of viability assessment, what attributes of the population in question should be considered, and what the limits of the PVA would be. As such, this volume can be used as a training tool for the environmental manager or a teaching aid for reviewing the current state of knowledge on plant population viability.
Author: Center for Plant Conservation
Publisher: Island Press
ISBN: 1597267562
Category : Nature
Languages : en
Pages : 536
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Book Description
Faced with widespread and devastating loss of biodiversity in wild habitats, scientists have developed innovative strategies for studying and protecting targeted plant and animal species in "off-site" facilities such as botanic gardens and zoos. Such ex situ work is an increasingly important component of conservation and restoration efforts. Ex Situ Plant Conservation, edited by Edward O. Guerrant Jr., Kayri Havens, and Mike Maunder, is the first book to address integrated plant conservation strategies and to examine the scientific, technical, and strategic bases of the ex situ approach. The book examines where and how ex situ investment can best support in situ conservation. Ex Situ Plant Conservation outlines the role, value, and limits of ex situ conservation as well as updating best management practices for the field, and is an invaluable resource for plant conservation practitioners at botanic gardens, zoos, and other conservation organizations; students and faculty in conservation biology and related fields; managers of protected areas and other public and private lands; and policymakers and members of the international community concerned with species conservation.
Author: Peggy L. Fiedler
Publisher: Springer Science & Business Media
ISBN: 1461560519
Category : Nature
Languages : en
Pages : 574
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Refecting what a new generation of conservation biologists is doing and thinking, this vital and far ranging second edition explores where conservation biology is heading. It challenges many conventions of conservation biology by exposing certain weaknesses of widely accepted principles. Combining contributions from both the school and the new breed of conservation biologists, this insightful text focuses primarily on topics the are integral to the daily activities of conservation biologists. Several chapters address ecosystem restoration and biotic invasions as well as the the mechanics of population viability analyses, which are now a routine facet of conservation efforts. A case history approach is implemented throughout the book, with the use of practical real-world examples. Furthermore, an in-depth look at quantitative analyses is presented, allowing for models and mathematical analyses to pinpoint limitations in existing data and guide research toward those aspects of biology that are most likely to be critical to the dynamics of a species or an ecosystem.
Author: T. Czaran
Publisher: Springer Science & Business Media
ISBN: 9780412575501
Category : Science
Languages : en
Pages : 312
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This book presents a comprehensive typology and a comprehensible description of spatiotemporal models used in population dynamics. The main types included are: reaction-diffusion systems, patch models, matapopulation approaches, host parasitoid models, cellular automata (interacting particle systems), tessellations and distance models. The models are introduced through examples and with informative verbal explanations to help understanding. Some of the cellular automation examples are models not yet published elsewhere. Possible extensions of certain model types are suggested.
Author: Timo Olavi Vuorisalo
Publisher: Springer Science & Business Media
ISBN: 9781402002793
Category : Medical
Languages : en
Pages : 368
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"The lack of discussion of the life histories of modular organisms is the weakness of this book that I most regret. . . . Modular organisms are different. " S. C. Steams: The Evolution of Life Histories (1992) Life-history theory endeavours to increase our understanding of the processe,s whereby the broad features of the life cycles of organisms, such as the timing and magnitude of reproduction, have evolved. Although reproductive traits have dominated as study objects due to their immediate importance for evolutionary success, much work has also been conducted on patterns of development, growth and senescence, as well as on the shifts in resource allocation related to these processes. The basic axiom of life-history theory is that patterns of life histories, such as reproductive traits, are subject to evolutionary explanation. This idea can be traced back at least as far as Darwin's Origin of Species (1859). In his discussion of plant domestication, Darwin wrote: "I cannot doubt that the continued selection of slight variations, either in the leaves, the flowers, or the fruit, will produce races differing from each other chiefly in these characters". Darwin was impressed by the success of plant breeders in moulding the growth and reproductive parameters of cultivated plants, and believed that natural selection could have a similar impact in natural populations.
Author: Kara A. Moore
Publisher:
ISBN:
Category : Desert plants
Languages : en
Pages : 216
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Author: Frank Gilliam
Publisher: Oxford University Press
ISBN: 0199837651
Category : Nature
Languages : en
Pages : 689
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The most comprehensive existing volume of multidisciplinary research by top ecologists on the herbaceous layer of forests.
Author:
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 464
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