Navigating the multiple meanings of β diversity: a roadmap for the practicing ecologist.
A roadmap of the most widely used and ecologically relevant approaches for analysis through a series of mission statements is provided, distinguishing two types of β diversity: directional turnover along a gradient vs. non-directional variation.
Niche conservatism as an emerging principle in ecology and conservation biology.
The mounting evidence for the importance of niche conservatism to major topics in ecology and conservation and other areas where it may be important but has generally been overlooked is described.
Evolution and the latitudinal diversity gradient: speciation, extinction and biogeography.
Two major hypotheses for the origin of the latitudinal diversity gradient are reviewed, including the time and area hypothesis and the diversification rate hypothesis, which hold that tropical regions diversify faster due to higher rates of speciation, or due to lower extinction rates.
“How Local Is Local?”—A Review of Practical and Conceptual Issues in the Genetics of Restoration
This work focuses on genetic concerns arising from ongoing restoration efforts, where often little is known about “How local is local?” (i.e., the geographic or environmental scale over which plant species are adapted).
Local extinction in a metapopulation context: an empirical evaluation
- S. Harrison
- Environmental Science, Economics
A modified view of metapopulation dynamics is suggested, in which local extinction is more an incidental than a central feature and regional persistence depends critically upon parameters influencing extinction and colonization rates.
Disentangling the Drivers of β Diversity Along Latitudinal and Elevational Gradients
It is shown that sampling alone predicts changes in β diversity caused simply by changes in the sizes of species pools, and there is no need to invoke differences in the mechanisms of community assembly in temperate versus tropical systems to explain these global-scale patterns of β diversity.
The spatial spread of invasions: new developments in theory and evidence
It is shown that invasive species spread is a much more complex process than the classical models suggested, as long range dispersal events can have a large influence on the rate of range expansion through time.
SPATIAL HETEROGENEITY EXPLAINS THE SCALE DEPENDENCE OF THE NATIVE-EXOTIC DIVERSITY RELATIONSHIP
- K. Davies, P. Chesson, S. Harrison, B. Inouye, B. Melbourne, K. Rice
- Environmental Science
- 1 June 2005
While small-scale studies show that more diverse native communities are less invasible by exotics, studies at large spatial scales often find positive correlations between native and exotic…
Beta diversity on geographic gradients in Britain
In the British biota, turnover at this scale is more the product of range and habitat restriction than of dispersal limitation; and turnover is a relatively minor component of regional diversity, because of the predominance of strong gradients in alpha diversity.
Invasion in a heterogeneous world: resistance, coexistence or hostile takeover?
An environmental heterogeneity hypothesis of invasions is proposed, whereby heterogeneity both increases invasion success and reduces the impact to native species in the community, because it promotes invasion and coexistence mechanisms that are not possible in homogeneous environments.