Subtidal macroalgal richness, diversity and turnover, at multiple spatial scales, along the southwestern Australian coastline
Subtidal macroalgal richness, diversity and turnover, at multiple spatial scales, along the southwestern Australian coastline
Patterns of species richness are governed by processes that act at vastly different spatial scales. In the marine system of southwest Australia, macroalgal assemblage structure and richness is thought to be strongly influenced by both the Leeuwin Current, which acts at large regional spatial scales, and small-scale processes such as competition, wave disturbance and habitat heterogeneity. We examined macroalgal species richness and diversity at multiple spatial scales using a three-factor hierarchal design. Spatial extents ranged from metres (between quadrats) to many hundreds of kilometres (between regions), and the study encompassed almost 2000 km of temperate coastline. Macroalgal assemblages were highly speciose and the number, identity, and diversity of species varied considerably at all spatial scales. Small scale variability, at the scale of site or quadrat, contributed most to total variation in species richness and diversity, suggesting that small-scale processes are important drivers of ecological pattern in this system. Species richness, diversity and taxonomic distinctness increased sequentially along the coastline, from warmer to cooler waters. Small scale variability was most likely maintained by wave disturbance and habitat heterogeneity at these scales, while regional scale diversity and richness clines were attributed to the fact that most species had cool-water affinities and the southern coast of Australia is a hotspot of floral speciation and diversity. Macroalgal assemblages in southwest Australia are speciose and largely endemic, and biodiversity patterns are structured by multiple processes operating at multiple spatial scales.
marine biodiversity, nearshore ecology, subtidal communities, kelp beds, macroalgae
224-231
Smale, Dan A.
19528a3a-f66c-474d-ae13-c6405b8014ab
Kendrick, Gary A.
0353334b-ba64-42b0-8162-4d8ad75279b6
Wernberg, Thomas
bd368108-a7e1-4d4b-b4c2-6102aae7a7ff
20 January 2011
Smale, Dan A.
19528a3a-f66c-474d-ae13-c6405b8014ab
Kendrick, Gary A.
0353334b-ba64-42b0-8162-4d8ad75279b6
Wernberg, Thomas
bd368108-a7e1-4d4b-b4c2-6102aae7a7ff
Smale, Dan A., Kendrick, Gary A. and Wernberg, Thomas
(2011)
Subtidal macroalgal richness, diversity and turnover, at multiple spatial scales, along the southwestern Australian coastline.
Estuarine, Coastal and Shelf Science, 91 (2), .
(doi:10.1016/j.ecss.2010.10.022).
Abstract
Patterns of species richness are governed by processes that act at vastly different spatial scales. In the marine system of southwest Australia, macroalgal assemblage structure and richness is thought to be strongly influenced by both the Leeuwin Current, which acts at large regional spatial scales, and small-scale processes such as competition, wave disturbance and habitat heterogeneity. We examined macroalgal species richness and diversity at multiple spatial scales using a three-factor hierarchal design. Spatial extents ranged from metres (between quadrats) to many hundreds of kilometres (between regions), and the study encompassed almost 2000 km of temperate coastline. Macroalgal assemblages were highly speciose and the number, identity, and diversity of species varied considerably at all spatial scales. Small scale variability, at the scale of site or quadrat, contributed most to total variation in species richness and diversity, suggesting that small-scale processes are important drivers of ecological pattern in this system. Species richness, diversity and taxonomic distinctness increased sequentially along the coastline, from warmer to cooler waters. Small scale variability was most likely maintained by wave disturbance and habitat heterogeneity at these scales, while regional scale diversity and richness clines were attributed to the fact that most species had cool-water affinities and the southern coast of Australia is a hotspot of floral speciation and diversity. Macroalgal assemblages in southwest Australia are speciose and largely endemic, and biodiversity patterns are structured by multiple processes operating at multiple spatial scales.
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Published date: 20 January 2011
Keywords:
marine biodiversity, nearshore ecology, subtidal communities, kelp beds, macroalgae
Organisations:
Ocean Biochemistry & Ecosystems
Identifiers
Local EPrints ID: 348301
URI: http://eprints.soton.ac.uk/id/eprint/348301
ISSN: 0272-7714
PURE UUID: 07a7c58b-277e-4ccd-b7f6-e75fa54f8be3
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Date deposited: 12 Feb 2013 11:55
Last modified: 14 Mar 2024 12:57
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Author:
Dan A. Smale
Author:
Gary A. Kendrick
Author:
Thomas Wernberg
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