Age and growth of Lithothamnion muelleri (Corallinales, Rhodophyta) in the southwestern Gulf of California, Mexico

Age and growth of Lithothamnion muelleri (Corallinales, Rhodophyta) in the southwestern Gulf of California, Mexico

 The nongeniculate coralline alga Lithothamnion muelleri Lenormand ex Rosanoff is commonly found as a free-living rhodolith in the wave-exposed shallow waters of the southwestern Gulf of California. This species has bands along the main branch axes suggesting that growth is periodic and tha...

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Autores principales: Rivera, MG, Riosmena-Rodríguez, R, Foster, MS
Formato: Online
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2004
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/104
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spelling oai:cienciasmarinas.com.mx:article-1042019-04-22T18:27:05Z Age and growth of Lithothamnion muelleri (Corallinales, Rhodophyta) in the southwestern Gulf of California, Mexico Edad y crecimiento de Lithothamnion muelleri (Corallinales, Rhodophyta) en el suroeste del Golfo de California, México Rivera, MG Riosmena-Rodríguez, R Foster, MS age growth Lithothamnion muelleri rhodoliths Corallinales edad crecimiento Lithothamnion muelleri rodolitos Corallinales  The nongeniculate coralline alga Lithothamnion muelleri Lenormand ex Rosanoff is commonly found as a free-living rhodolith in the wave-exposed shallow waters of the southwestern Gulf of California. This species has bands along the main branch axes suggesting that growth is periodic and that may be used to determine age and growth. As part of our ongoing research related to rhodoliths and their ecology, we have made observations on the nature of these bands based on their structure in entire plants and on field and laboratory growth experiments. Individual plants from different size classes were tagged, stained with alizarin and returned to the field, while another set was tested in the laboratory. Half of the plants were sampled after 6 months and the rest after 12 months. The data indicate that this species grew at a rate of 0.60 mm yr–1 in the field and 0.87 mm yr–1 in the laboratory. There were no significant differences among branches within a plant, or among plants of different size. Growth was seasonal, with high rates in winter and spring, and low rates in summer and fall. This may explain the observed alternating light-dark bands (up to 4) along branch axes. The growth rates suggest that larger plants (ca 15 cm diameter) may be over 100 years old. El alga coralina no geniculada Lithothamnion muelleri Lenormand ex Rosanoff es comúnmente encontrada formando mantos de rodolitos en zonas someras expuestas al oleaje dentro del suroeste del Golfo de California. Esta especie tiene bandas de crecimiento a todo lo largo de las ramas principales del talo que sugieren un crecimiento periódico y que probablemente podrían ser utilizadas para determinar su tasa de crecimiento y edad. Como parte de la investigación que se está desarrollando sobre los mantos de rodolitos y su ecología, se desarrollaron observaciones sobre la naturaleza de esas bandas en la estructura de las plantas y en experimentos de crecimiento en campo y laboratorio. Se marcaron con alizarina plantas individuales de diferentes clases de talla en el campo y otro conjunto de plantas fue al laboratorio llevado para su análisis. La mitad de las plantas fueron muestreadas después de 6 meses y el resto recolectadas a los 12 meses. Los resultados muestran una tasa de crecimiento de 0.60 mm año–1 en el campo y 0.87 mm año–1 en el laboratorio. Los análisis estadísticos mostraron que no existen diferencias significativas entre las ramas de una planta, ni entre plantas de diferentes tamaños. El crecimiento fue estacional, con mayores tasas en invierno y primavera y menores en verano y otoño. Esto puede explicar la alternancia de bandas claras y obscuras (hasta 4) a lo largo de una rama principal. Las tasas de crecimiento sugieren que las plantas más grandes (p.ej. 15 cm de diámetro) podrían tener más de 100 años de antigüedad. Iniversidad Autónoma de Baja California 2004-03-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado application/pdf https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/104 10.7773/cm.v30i12.104 Ciencias Marinas; Vol. 30 No. 1B (2004); 235-249 Ciencias Marinas; Vol. 30 Núm. 1B (2004); 235-249 2395-9053 0185-3880 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/104/84
institution Ciencias Marinas
collection OJS
language eng
format Online
author Rivera, MG
Riosmena-Rodríguez, R
Foster, MS
spellingShingle Rivera, MG
Riosmena-Rodríguez, R
Foster, MS
Age and growth of Lithothamnion muelleri (Corallinales, Rhodophyta) in the southwestern Gulf of California, Mexico
author_facet Rivera, MG
Riosmena-Rodríguez, R
Foster, MS
author_sort Rivera, MG
title Age and growth of Lithothamnion muelleri (Corallinales, Rhodophyta) in the southwestern Gulf of California, Mexico
title_short Age and growth of Lithothamnion muelleri (Corallinales, Rhodophyta) in the southwestern Gulf of California, Mexico
title_full Age and growth of Lithothamnion muelleri (Corallinales, Rhodophyta) in the southwestern Gulf of California, Mexico
title_fullStr Age and growth of Lithothamnion muelleri (Corallinales, Rhodophyta) in the southwestern Gulf of California, Mexico
title_full_unstemmed Age and growth of Lithothamnion muelleri (Corallinales, Rhodophyta) in the southwestern Gulf of California, Mexico
title_sort age and growth of lithothamnion muelleri (corallinales, rhodophyta) in the southwestern gulf of california, mexico
description  The nongeniculate coralline alga Lithothamnion muelleri Lenormand ex Rosanoff is commonly found as a free-living rhodolith in the wave-exposed shallow waters of the southwestern Gulf of California. This species has bands along the main branch axes suggesting that growth is periodic and that may be used to determine age and growth. As part of our ongoing research related to rhodoliths and their ecology, we have made observations on the nature of these bands based on their structure in entire plants and on field and laboratory growth experiments. Individual plants from different size classes were tagged, stained with alizarin and returned to the field, while another set was tested in the laboratory. Half of the plants were sampled after 6 months and the rest after 12 months. The data indicate that this species grew at a rate of 0.60 mm yr–1 in the field and 0.87 mm yr–1 in the laboratory. There were no significant differences among branches within a plant, or among plants of different size. Growth was seasonal, with high rates in winter and spring, and low rates in summer and fall. This may explain the observed alternating light-dark bands (up to 4) along branch axes. The growth rates suggest that larger plants (ca 15 cm diameter) may be over 100 years old.
publisher Iniversidad Autónoma de Baja California
publishDate 2004
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/104
_version_ 1715723922218942464

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