Positive Interactions and Interdependence in Plant Communities
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Positive Interactions and Interdependence in Plant Communities

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ISBN-13:
9781402062247
Einband:
Ebook
Seiten:
404
Autor:
Ragan M. Callaway
eBook Typ:
PDF
eBook Format:
EPUB
Kopierschutz:
1 - PDF Watermark
Sprache:
Englisch
Beschreibung:
"Positive interactions and interdependence in plant communities offers a new look at an old problem - the nature of the communities. This book marshals ecological literature from the last century on facilitation to make the case against the widely accepted "individualistic" notion of community organization. Clearly, many species in many communities would not be present without the ameliorating effects of other species. In other words, communities are not produced only by summing the population ecology of species. Concepts covered include the idea that positive interactions are more prevalent in physically stressful conditions, species specificity in facilitative interactions, indirect facilitative interactions, how facilitation contributes to diversity-ecosystem function relationships, and potential evolutionary aspects of positive interactions. TOC:From the contents
Contents: 1 Introduction: 2 Direct mechanisms for facilitation: 2.1 Water relations: hydraulic lift.- 2.2 Water relations: canopy interception.- 2.3 Shade.- 2.4 Water relations: soil moisture.- 2.5 Nutrients.- 2.6 Wind.- 2.7 Soil oxygenation.- 2.8 Substrate.- 2.9 Disturbance.- 2.10 Population size and positive density dependence.- 2.11 Seed shadows.- 2.12 Communication.- 2.13 Conclusion.- 3 Indirect interactions: 3.1 Herbivore-mediated facilitation.- 3.2 Other herbivore-mediated positive effects.- 3.3 Reproductive feedback, pollinators, and population size.- 3.4 Dispersers.- 3.5 Mycorrhizae.- 3.6 Plant-soil microbe feedbacks.- 3.7 Positive interactions among competing plants.- 3.8 Conclusion.- 4 Interaction between competition and facilitation: 4.1 Competition, facilitation and abiotic stress.- 4.2 Spatial scales, time scales and the balance of facilitation and competition on stress gradients.- 4.3 Facilitation and stress: importance versus intensity.-4.4 Facilitation and life history stage.- 4.5 Competitive advantages provided by benefactors.- 4.6 Indirect effects and the balance of competition and facilitation.- 4.7 Pollution and shifts in facilitation and competition.- 4.8 Conclusion.- 5 Species-specific positive interactions: 5.1 Are beneficiary species non-randomly associated with potential benefactors? .-5.2 What Mechanisms cause species-specific facilitation?.- 6 Positive interactions and community organization: 6.1 Positive interactions and the expansion of niche space.- 6.2 Positive interactions and the role of diversity in community function.- 6.3 Positive interactions and spatial scale.- 6.4 Positive interactions and stability in plant.- 6.5 Facilitation and productivity.- 6.6 Positive interactions and exotic invasion.- 6.7 Facilitation and conservation.- 6.8 Facilitation and evolution in plant communities.- 6.9 Replacing the notion of individualistic communities with the 'integrated community.- 6.10 Conclusions.-
References.- Index

Positive interactions and interdependence in plant communities offers a new look at an old problem ¿ the nature of the communities. This book marshals ecological literature from the last century on facilitation to make the case against the widely accepted ¿individualistic¿ notion of community organization. Clearly, many species in many communities would not be present without the ameliorating effects of other species. In other words, communities are not produced only by summing the population ecology of species. Concepts covered include the idea that positive interactions are more prevalent in physically stressful conditions, species specificity in facilitative interactions, indirect facilitative interactions, how facilitation contributes to diversity-ecosystem function relationships, and potential evolutionary aspects of positive interactions.