Book contents
- The Species–Area Relationship
- Ecology, Biodiversity and Conservation
- The Species–Area Relationship
- Copyright page
- Contents
- Contributors
- Foreword
- Preface
- Part I Introduction and History
- Part II Diversity–Area Relationships: The Different Types and Underlying Factors
- 3 Explaining Variation in Island Species–Area Relationship (ISAR) Model Parameters between Different Archipelago Types: Expanding a Global Model of ISARs
- 4 Determinants of the Shape of Species–Area Curves
- 5 Functional and Phylogenetic Diversity–Area Relationships
- 6 Species–Area Relationships in Alien Species: Pattern and Process
- Part III Theoretical Advances in Species–Area Relationship Research
- Part IV The Species–Area Relationship in Applied Ecology
- Part V Future Directions in Species–Area Relationship Research
- Index
- References
4 - Determinants of the Shape of Species–Area Curves
from Part II - Diversity–Area Relationships: The Different Types and Underlying Factors
Published online by Cambridge University Press: 11 March 2021
- The Species–Area Relationship
- Ecology, Biodiversity and Conservation
- The Species–Area Relationship
- Copyright page
- Contents
- Contributors
- Foreword
- Preface
- Part I Introduction and History
- Part II Diversity–Area Relationships: The Different Types and Underlying Factors
- 3 Explaining Variation in Island Species–Area Relationship (ISAR) Model Parameters between Different Archipelago Types: Expanding a Global Model of ISARs
- 4 Determinants of the Shape of Species–Area Curves
- 5 Functional and Phylogenetic Diversity–Area Relationships
- 6 Species–Area Relationships in Alien Species: Pattern and Process
- Part III Theoretical Advances in Species–Area Relationship Research
- Part IV The Species–Area Relationship in Applied Ecology
- Part V Future Directions in Species–Area Relationship Research
- Index
- References
Summary
The search for the mechanisms that drive the species–area relationship (SAR) has been complicated by a number of factors. First, the different proposed mechanisms have generally been considered to be mutually exclusive. Second, due to the misinterpretation of curve shapes after (log) transformation of one or both of the axes. Third, due to confusion about different types of SAR, such as isolate and sample area SARs. These two SAR types are underpinned, at least partly, by different factors (or drivers), which act in combination. The different patterns and processes that drive the SAR can be organized according to a hierarchy: from underlying environmental patterns at the bottom, through the processes driving species diversity patterns, up to the research and sampling design. Environmental patterns include both biological and geographical patterns, while processes may be stochastic, evolutionary or ecological. The resultant species diversity patterns include species range patterns, species densities, species abundances and the spatial distribution of individuals of a species. Although the individuals of a species are rarely randomly distributed in space, the random placement model provides a useful null model that can be used to partition the effects of species abundances and the spatial distributions of individuals on SARs.
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- The Species–Area RelationshipTheory and Application, pp. 78 - 106Publisher: Cambridge University PressPrint publication year: 2021
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