Do plant functional traits determine spatial pattern? A test on species-rich shrublands, Western Australia

Do plant functional traits determine spatial pattern? A test on species-rich shrublands, Western Australia

Questions: A species' spatial pattern is the outcome of a series of filters: demographic, disturbance, environmental and functional, all varying over space and time. To evaluate the importance of function as a filter we ask: (1) do a species' functional traits allow prediction of its fine-...

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Veröffentlicht in:Journal of Vegetation Science. - Opulus Press. - 24(2013), 3, Seite 441-452
1. Verfasser: Perry, George L.W. (VerfasserIn)
Weitere Verfasser: Enright, Neal J., Miller, Ben P., Lamont, Byron B.
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2013
Zugriff auf das übergeordnete Werk:Journal of Vegetation Science
Schlagworte:Biological sciences Philosophy Physical sciences
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100 1 |a Perry, George L.W.  |e verfasserin  |4 aut 
245 1 0 |a Do plant functional traits determine spatial pattern? A test on species-rich shrublands, Western Australia 
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520 |a Questions: A species' spatial pattern is the outcome of a series of filters: demographic, disturbance, environmental and functional, all varying over space and time. To evaluate the importance of function as a filter we ask: (1) do a species' functional traits allow prediction of its fine-scale spatial patterning, and (2) how consistent is the fine-scale spatial pattern shown by the same species across multiple sites where the properties of the other filters may vary? Location: Species-rich Mediterranean climate shrublands of southwestern Australia's northern sandplains. Methods: Using fully mapped plots at four sites (each > 10 000 individuals, 74—112 species), we characterized individual species spatial patterning using point pattern analyses. We classified species spatial patterns in three ways: (1) whether they departed from a null model controlling for first-order effects (i.e. are they aggregated?), (2) parameterization of Thomas cluster processes (what form does any clustering take?), and (3) their position in a multivariate 'pattern space' (do species show different types of pattern?). We then explored the extent to which a species' functional traits, abundance and/or the site at which it occurred predicted these three facets of its spatial pattern. Results: Although at all sites most species were aggregated, site was consistently important in predicting a species' spatial pattern. Regenerative response to fire — whether a species is killed by fire and recruits solely via seeds, or survives and resprouts vegetatively after fire — was the functional trait most consistently useful in predicting a species' spatial pattern. Fire-killed species tended to show more aggregated distributions than resprouters. Species present at multiple sites did not show consistency in their spatial patterns across those sites more than expected by chance alone. Conclusions: Although functional traits relating to fire responses and water use predict species spatial distributions at the landscape level, at the fine scales we considered site effects were as important as functional traits in explaining spatial pattern. Within and between site heterogeneity, some of which can be generated by the stochastic properties of fire, may mask the deterministic effects of species functional traits. 
540 |a Copyright © 2013 International Association for Vegetation Science 
650 4 |a Biological sciences  |x Biology  |x Biological taxonomies  |x Species 
650 4 |a Biological sciences  |x Ecology  |x Plant ecology  |x Vegetation 
650 4 |a Philosophy  |x Metaphysics  |x Ontology  |x Atomism  |x Aggregation 
650 4 |a Biological sciences  |x Ecology  |x Plant ecology 
650 4 |a Biological sciences  |x Biology  |x Botany  |x Plants 
650 4 |a Biological sciences  |x Ecology  |x Ecosystems  |x Biomes  |x Shrublands 
650 4 |a Biological sciences  |x Ecology  |x Plant ecology  |x Forest ecology 
650 4 |a Biological sciences  |x Ecology  |x Landscape ecology 
650 4 |a Biological sciences  |x Ecology  |x Ecosystems 
650 4 |a Physical sciences  |x Earth sciences  |x Geography  |x Geomorphology  |x Landforms  |x Swales 
655 4 |a research-article 
700 1 |a Enright, Neal J.  |e verfasserin  |4 aut 
700 1 |a Miller, Ben P.  |e verfasserin  |4 aut 
700 1 |a Lamont, Byron B.  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Journal of Vegetation Science  |d Opulus Press  |g 24(2013), 3, Seite 441-452  |w (DE-627)329555960  |w (DE-600)2047714-4  |x 16541103  |7 nnns 
773 1 8 |g volume:24  |g year:2013  |g number:3  |g pages:441-452 
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