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| Format: | Artículo científico |
| Language: | es |
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Pontificia Universidad Católica de Valparaíso
2001
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| Online Access: | https://www.redalyc.org/articulo.oa?id=45629104 |
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| _version_ | 1866811731089555456 |
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| author | Eduardo Alberto Vallarino |
| author_facet | Eduardo Alberto Vallarino |
| contents | The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community Eduardo Alberto Vallarino Rodrigu Elias Nilcéa Ciencias de la Tierra port intertidal Balanus glandula successional pattern Southwestern Atlantic The paper deals with the distribution pattern and population dynamics of the introduced barnacle Balanusglandula in the intertidal areas of Mar del Plata port. The reproductive cycle of this barnacle is discussed as a communitystructuring force. Replicated areas in both the high intertidal and the upper mid intertidal zones were monthly denuded.The recruitment, cumulative settlement, mortality and growth of B. glandula were recorded, as well as the successionpattern of the associated fauna. First settlement of B. glandula occurred in winter (July). Succession begins with a filmof microorganisms followed by green algae (Ulva lactuca and Enteromorpha spp.) which dominate up to a final stageof B. glandula dominated community is reached all along the intertidal. B. glandula densities were significantly higherin the mid intertidal than in the high intertidal (19600 and 13600 ind. m-2, respectively). Annual mean mortality washigh in the port (up to 62%) but heavy settlement allowed a final density 4 times greater than in the upper mid intertidalof exposed rocky shores, and twice the greatest density reached in the Northern Hemisphere. Winter reproduction of B.glandula, absence of predators, and the neutral or beneficial effect of algae allows this species to occupy in waveprotected areas the whole intertidal zone, displacing the former B. amphitrite populations from the intertidal to thesubtidal. In exposed rocky shores the species outcompete mussels from the high intertidal, establishing the typicalbarnacle fringe. 2001 artículo científico 0716-1069 https://www.redalyc.org/articulo.oa?id=45629104 es http://www.redalyc.org/revista.oa?id=456 Investigaciones Marinas application/pdf Pontificia Universidad Católica de Valparaíso Investigaciones Marinas (Chile) Num.1 Vol.29 |
| format | Artículo científico |
| id | redalyc_45629104 |
| language | es |
| publishDate | 2001 |
| publisher | Pontificia Universidad Católica de Valparaíso |
| spellingShingle | The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community Eduardo Alberto Vallarino Ciencias de la Tierra port intertidal Balanus glandula successional pattern Southwestern Atlantic The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community Eduardo Alberto Vallarino Rodrigu Elias Nilcéa Ciencias de la Tierra port intertidal Balanus glandula successional pattern Southwestern Atlantic The paper deals with the distribution pattern and population dynamics of the introduced barnacle Balanusglandula in the intertidal areas of Mar del Plata port. The reproductive cycle of this barnacle is discussed as a communitystructuring force. Replicated areas in both the high intertidal and the upper mid intertidal zones were monthly denuded.The recruitment, cumulative settlement, mortality and growth of B. glandula were recorded, as well as the successionpattern of the associated fauna. First settlement of B. glandula occurred in winter (July). Succession begins with a filmof microorganisms followed by green algae (Ulva lactuca and Enteromorpha spp.) which dominate up to a final stageof B. glandula dominated community is reached all along the intertidal. B. glandula densities were significantly higherin the mid intertidal than in the high intertidal (19600 and 13600 ind. m-2, respectively). Annual mean mortality washigh in the port (up to 62%) but heavy settlement allowed a final density 4 times greater than in the upper mid intertidalof exposed rocky shores, and twice the greatest density reached in the Northern Hemisphere. Winter reproduction of B.glandula, absence of predators, and the neutral or beneficial effect of algae allows this species to occupy in waveprotected areas the whole intertidal zone, displacing the former B. amphitrite populations from the intertidal to thesubtidal. In exposed rocky shores the species outcompete mussels from the high intertidal, establishing the typicalbarnacle fringe. 2001 artículo científico 0716-1069 https://www.redalyc.org/articulo.oa?id=45629104 es http://www.redalyc.org/revista.oa?id=456 Investigaciones Marinas application/pdf Pontificia Universidad Católica de Valparaíso Investigaciones Marinas (Chile) Num.1 Vol.29 |
| title | The introduced barnacle Balanus glandula (Darwin) in the Mar del Plata port as a structuring species in the intertidal community |
| topic | Ciencias de la Tierra port intertidal Balanus glandula successional pattern Southwestern Atlantic |
| url | https://www.redalyc.org/articulo.oa?id=45629104 |