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dc.contributor.author
Centurion, Romina Luisa Sabrina
dc.contributor.author
López Gappa, Juan José
dc.date.available
2019-01-30T17:48:37Z
dc.date.issued
2011-01
dc.identifier.citation
Centurion, Romina Luisa Sabrina; López Gappa, Juan José; Bryozoan assemblages on hard substrata: Species abundance distribution and competition for space; Springer; Hydrobiologia; 658; 1; 1-2011; 329-341
dc.identifier.issn
0018-8158
dc.identifier.uri
http://hdl.handle.net/11336/69018
dc.description.abstract
Bryozoans are colonial invertebrates that often dominate epibenthic assemblages on the lower surfaces of hard substrata. Competition among neighbouring organisms is usually a critical process regulating biodiversity, and hard substrata have proved to be a suitable model habitat to analyse spatial interactions. We explored the relationships among abundance, species richness, diversity, competitive ability, coverage, available surface, depth and substratum size in an assemblage of bryozoans encrusting pebbles and cobbles in a bank off the eastern mouth of the Strait of Magellan. We also tested whether overgrowth competition can be regarded as hierarchical, and whether the species abundance distribution shows a mode of rare species and a decreasing frequency of increasingly abundant species. Abundance, species richness, diversity and overgrowth competition were highest on the largest substrata. Smaller pebbles tended to be encrusted by the commonest bryozoans, while the rarest species were mainly found on relatively larger clasts. A high proportion of the lower surfaces of most substrata was available for growth. Diversity values of relatively shallow stations were lower than expected under Caswell's neutral model. Interspecific competition was hierarchical, but the abundance of colonies was not related to the competitive ability of each species. The species abundance distribution was bimodal, with a main mode of rare species and a second one partly composed of relatively abundant bryozoans with poor competitive abilities. This study shows that even in an encrusting assemblage where competition is hierarchical, the weakest competitors persist and the dominant species are far from being capable of monopolizing space.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Commonness And Rarity of Species
dc.subject
Encrusting Bryozoans
dc.subject
Hard Substrata
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Overgrowth Competition
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Species Abundance Distributions
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Strait of Magellan
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Otras Ciencias Biológicas
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Bryozoan assemblages on hard substrata: Species abundance distribution and competition for space
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-01-30T13:54:36Z
dc.identifier.eissn
1573-5117
dc.journal.volume
658
dc.journal.number
1
dc.journal.pagination
329-341
dc.journal.pais
Alemania
dc.description.fil
Fil: Centurion, Romina Luisa Sabrina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
dc.description.fil
Fil: López Gappa, Juan José. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”; Argentina
dc.journal.title
Hydrobiologia
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s10750-010-0503-5
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007%2Fs10750-010-0503-5


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