metacommunities

Download Book Metacommunities in PDF format. You can Read Online Metacommunities here in PDF, EPUB, Mobi or Docx formats.

Metacommunities

Author : Marcel Holyoak
ISBN : 9780226350646
Genre : Nature
File Size : 64. 33 MB
Format : PDF, ePub, Mobi
Download : 487
Read : 1020

Get This Book


Until recently community ecology—a science devoted to understanding the patterns and processes of species distribution and abundance—focused mainly on specific and often limited scales of a single community. Since the 1970s, for example, metapopulation dynamics—studies of interacting groups of populations connected through movement—concentrated on the processes of population turnover, extinction, and establishment of new populations. Metacommunities takes the hallmarks of metapopulation theory to the next level by considering a group of communities, each of which may contain numerous populations, connected by species interactions within communities and the movement of individuals between communities. In examining communities open to dispersal, the book unites a broad range of ecological theories, presenting some of the first empirical investigations and revealing the value of the metacommunity approach. The collection of empirical, theoretical, and synthetic chapters in Metacommunities seeks to understand how communities work in fragmented landscapes. Encouraging community ecologists to rethink some of the leading theories of population and community dynamics, Metacommunities urges ecologists to expand the spatiotemporal scales of their research.

Habitat Age Influences Metacommunity Assembly And Species Richness In Successional Pond Ecosystems

Author :
ISBN : OCLC:1051820029
Genre :
File Size : 70. 48 MB
Format : PDF, ePub
Download : 723
Read : 679

Get This Book


Abstract: Metacommunity theory suggests that species diversity can depend upon the time since initiation of community assembly, or habitat age, as the relative influence of regional and local structuring processes changes over succession. There are, however, few studies that evaluate the role of habitat age in structuring species richness (diversity–age) over large, fine‐resolution age gradients of secondary succession in metacommunities. To test theoretical predictions of diversity–age relationships in metacommunities, zooplankton species richness and composition along a successional chronosequence in beaver ( Castor canadensis ) ponds were evaluated. The age of ponds was determined using dendrochronology and historical photography, and ranged from 23 to 69yr of age. A unimodal relationship between zooplankton species richness and habitat age was observed among the successional ecosystems. This hump‐shaped relationship with community assembly time is congruent with theoretical predictions of species richness in metacommunities and can be explained by the increasing importance of local, relative to regional, structuring processes over successional trajectories. Observed patterns of diversity and composition responded to age‐mediated effects on the local pond environment; older ponds were deeper, had lower colored dissolved organic carbon, and were permanent. Additionally, there were weak but significant dispersal effects on community composition across the region. The lack of consistent community composition by successional stage reflected variation from differences in pond nutrient availability and species dispersal. The results indicate that regional and local age‐dependent structuring mechanisms operate at each successional stage on different local colonist pools and environments yielding communities that reflect succession in their richness response. Consequently, secondary succession should be considered an influential driver of species diversity across temporal and spatial scales in metacommunities.

Metacommunity Ecology

Author : Mathew A. Leibold
ISBN : 9781400889068
Genre : Science
File Size : 64. 26 MB
Format : PDF
Download : 439
Read : 1201

Get This Book


Metacommunity ecology links smaller-scale processes that have been the provenance of population and community ecology—such as birth-death processes, species interactions, selection, and stochasticity—with larger-scale issues such as dispersal and habitat heterogeneity. Until now, the field has focused on evaluating the relative importance of distinct processes, with niche-based environmental sorting on one side and neutral-based ecological drift and dispersal limitation on the other. This book moves beyond these artificial categorizations, showing how environmental sorting, dispersal, ecological drift, and other processes influence metacommunity structure simultaneously. Mathew Leibold and Jonathan Chase argue that the relative importance of these processes depends on the characteristics of the organisms, the strengths and types of their interactions, the degree of habitat heterogeneity, the rates of dispersal, and the scale at which the system is observed. Using this synthetic perspective, they explore metacommunity patterns in time and space, including patterns of coexistence, distribution, and diversity. Leibold and Chase demonstrate how these processes and patterns are altered by micro- and macroevolution, traits and phylogenetic relationships, and food web interactions. They then use this scale-explicit perspective to illustrate how metacommunity processes are essential for understanding macroecological and biogeographical patterns as well as ecosystem-level processes. Moving seamlessly across scales and subdisciplines, Metacommunity Ecology is an invaluable reference, one that offers a more integrated approach to ecological patterns and processes.

Ecology Genetics And Evolution Of Metapopulations

Author : Ilkka Hanski
ISBN : 9780123234483
Genre : Science
File Size : 76. 32 MB
Format : PDF, ePub, Mobi
Download : 187
Read : 201

Get This Book


Spatial dynamics, landscape, population.

Effects Of Diffusion On Total Biomass In Simple Metacommunities

Author :
ISBN : OCLC:1051848181
Genre :
File Size : 34. 96 MB
Format : PDF, Mobi
Download : 774
Read : 1319

Get This Book


Highlights: Analysis of dispersal effect on simple metacommunities. Competition or prey-predator interactions are considered. Dispersion can increase or decrease the overall population. Precise thresholds on the parameters are computed. Abstract: This paper analyzes the effects of diffusion on the overall population size of the different species of a metacommunity. Depending on precise thresholds, we determine whether increasing the dispersal rate of a species has a positive or negative effect on population abundance. These thresholds depend on the interaction type of the species and the quality of the patches. The motivation for researching this issue is that spatial structure is a source of new biological insights with management interest. For instance, in a metacommunity of two competitors, the movement of a competitor could lead to a decrease of the overall population size of both species. On the other hand, we discuss when some classic results of metapopulation theory are preserved in metacommunities. Our results complement some recent experimental work by Zhang and collaborators.

Metapopulation Ecology

Author : Ilkka Hanski
ISBN : 0198540655
Genre : Nature
File Size : 88. 96 MB
Format : PDF, Mobi
Download : 371
Read : 1012

Get This Book


Metapopulation is the ecological term for assemblages of plant and animal species within larger areas of space, with long-term survival of the species depending on a shifting balance between local extinctions and recolonizations in the patchwork of fragmented landscape. Metapopulation theory is of particular importance to conservation biologists attempting to understand the processes of regional extinction - and survival - of species. Metapopulation Ecology presents a comprehensive synthesis of current research in this rapidly expanding area of population biology from an author who is famous for his work on metapopulations. It encompasses the essential theory of metapopulations, describing the main approaches to modelling metapopulation dynamics in highly fragmented landscapes, with an emphasis on spatially realistic models that can be applied to real metapopulations.

The Princeton Guide To Ecology

Author : Simon A. Levin
ISBN : 1400833027
Genre : Nature
File Size : 33. 69 MB
Format : PDF, ePub
Download : 154
Read : 422

Get This Book


The Princeton Guide to Ecology is a concise, authoritative one-volume reference to the field's major subjects and key concepts. Edited by eminent ecologist Simon Levin, with contributions from an international team of leading ecologists, the book contains more than ninety clear, accurate, and up-to-date articles on the most important topics within seven major areas: autecology, population ecology, communities and ecosystems, landscapes and the biosphere, conservation biology, ecosystem services, and biosphere management. Complete with more than 200 illustrations (including sixteen pages in color), a glossary of key terms, a chronology of milestones in the field, suggestions for further reading on each topic, and an index, this is an essential volume for undergraduate and graduate students, research ecologists, scientists in related fields, policymakers, and anyone else with a serious interest in ecology. Explains key topics in one concise and authoritative volume Features more than ninety articles written by an international team of leading ecologists Contains more than 200 illustrations, including sixteen pages in color Includes glossary, chronology, suggestions for further reading, and index Covers autecology, population ecology, communities and ecosystems, landscapes and the biosphere, conservation biology, ecosystem services, and biosphere management

The American Naturalist

Author :
ISBN : MINN:31951P00965446N
Genre : Natural history
File Size : 48. 39 MB
Format : PDF, ePub, Docs
Download : 202
Read : 1008

Get This Book



Local And Regional Influences Over Soil Microbial Metacommunities In The Transantarctic Mountains

Author :
ISBN : OCLC:1051776173
Genre :
File Size : 63. 90 MB
Format : PDF, Docs
Download : 274
Read : 1036

Get This Book


Abstract : The metacommunity concept provides a useful framework to assess the influence of local and regional controls over diversity patterns. Culture‐independent studies of soil microbial communities in the McMurdo Dry Valleys of East Antarctica (77° S) have shown that bacterial diversity is related to soil geochemical gradients, while studies targeting edaphic cyanobacteria have linked local diversity patterns to dispersal‐based processes. In this study, we increased the spatial extent of observed soil microbial communities to cover the Beardmore Glacier region in the central Transantarctic Mountains (84° S). We used community profiling techniques to characterize diversity patterns for bacteria and the cyanobacterial subcomponent of the microbial community. Diversity partitioning was used to calculate beta diversity and estimate among‐site dissimilarity in the metacommunity. We then used variation partitioning to assess the relationship between beta diversity and environmental and spatial gradients. We found that dominant groups in the soil bacterial metacommunity were influenced by gradients in pH and soil moisture at the Transantarctic scale (800 km). Conversely, beta diversity for the cyanobacterial component of the edaphic microbial metacommunity was decoupled from these environmental gradients, and was more related to spatial filters, suggesting that wind‐driven dispersal dynamics created cyanobacterial biogeography at a local scale (

Issues In Ecological Research And Application 2011 Edition

Author :
ISBN : 9781464964084
Genre : Science
File Size : 30. 9 MB
Format : PDF, ePub, Docs
Download : 147
Read : 1017

Get This Book


Issues in Ecological Research and Application: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Ecological Research and Application. The editors have built Issues in Ecological Research and Application: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Ecological Research and Application in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Ecological Research and Application: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Top Download:

Best Books