Spatio-temporal changes in the tropic structure of Rocky intertidal mollusc assemblages on a tropical shore
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| Format: | Artículo científico |
| Language: | en |
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Universidad Autónoma de Baja California
2001
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| author | C. Olabarria |
| author_facet | C. Olabarria |
| contents | Spatio-temporal changes in the tropic structure of Rocky intertidal mollusc assemblages on a tropical shore C. Olabarria J. L. Carballo C. Vega Ciencias de la Tierra molluscs rocky intertidal trophic structure multivariant analyses eastern tropical Pacific Patterns of the distribution and temporal variation of trophic groups within a benthic molluscasemblage of a tropical shore (eastern tropical Pacific) were analysed in this study. Four intertidal rockysites with different wave exposure were studied. A three-factor analysis of variance (fixed factors: trophicgroups and level of exposure; random factor: site) and the Student-Newman-Keuls a posteriori test(P =0.05) were applied to the biomass of trophic groups in order to know the variation among differentsites. Carnivores, herbivores and suspension-feeders varied significantly among sites within eachexposure level. Suspension-feeders were more abundant at exposed sites, while herbivores dominated insheltered places. Biomass of herbivores was not correlated to macroalgal biomass. Total biomass washighest at exposed sites, increasing in winter and decreasing in summer. An ordination analysis carriedout with the non-metric multidimensional scaling programme (MDS) revealed two trophic groups:groupA included samples from exposed sites (E1, E2) and group B included samples from sheltered sites(E3, E4). Graphic methods (ABC curves) detected changes along temporal and spatial scales, and thesecould be related to a high proportion of small species. Factors such as exposure level and type of substratemay control the distribution of different trophic groups. 2001 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48027205 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.27 |
| format | Artículo científico |
| id | redalyc_48027205 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Universidad Autónoma de Baja California |
| spellingShingle | Spatio-temporal changes in the tropic structure of Rocky intertidal mollusc assemblages on a tropical shore C. Olabarria Ciencias de la Tierra molluscs rocky intertidal trophic structure multivariant analyses eastern tropical Pacific Spatio-temporal changes in the tropic structure of Rocky intertidal mollusc assemblages on a tropical shore C. Olabarria J. L. Carballo C. Vega Ciencias de la Tierra molluscs rocky intertidal trophic structure multivariant analyses eastern tropical Pacific Patterns of the distribution and temporal variation of trophic groups within a benthic molluscasemblage of a tropical shore (eastern tropical Pacific) were analysed in this study. Four intertidal rockysites with different wave exposure were studied. A three-factor analysis of variance (fixed factors: trophicgroups and level of exposure; random factor: site) and the Student-Newman-Keuls a posteriori test(P =0.05) were applied to the biomass of trophic groups in order to know the variation among differentsites. Carnivores, herbivores and suspension-feeders varied significantly among sites within eachexposure level. Suspension-feeders were more abundant at exposed sites, while herbivores dominated insheltered places. Biomass of herbivores was not correlated to macroalgal biomass. Total biomass washighest at exposed sites, increasing in winter and decreasing in summer. An ordination analysis carriedout with the non-metric multidimensional scaling programme (MDS) revealed two trophic groups:groupA included samples from exposed sites (E1, E2) and group B included samples from sheltered sites(E3, E4). Graphic methods (ABC curves) detected changes along temporal and spatial scales, and thesecould be related to a high proportion of small species. Factors such as exposure level and type of substratemay control the distribution of different trophic groups. 2001 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48027205 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.27 |
| title | Spatio-temporal changes in the tropic structure of Rocky intertidal mollusc assemblages on a tropical shore |
| topic | Ciencias de la Tierra molluscs rocky intertidal trophic structure multivariant analyses eastern tropical Pacific |
| url | https://www.redalyc.org/articulo.oa?id=48027205 |