Deep rhodolith distribution in the Pontian Islands, Italy: a model for the paleoecology of a temperate sea

Basso, Daniela

doi:10.1016/s0031-0182(97)00099-0

Cited by 196 publications

(147 citation statements)

References 9 publications

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“…Se ha encontrado que la diversidad de los organismos asociados con los rodolitos se relaciona con el tamaño y la complejidad del talo, así como su dureza en las formas ramificadas. Algunos factores ambientales, tales como el movimiento del agua, la disponibilidad de luz, la sedimentación y la profundidad, afectan el tamaño, la morfología, la estabilidad y la distribución de los rodolitos (Steller y Foster 1995, Harris et al 1996, Basso 1998. La diversidad en los sedimentos circundantes probablemente esté relacionada con la complejidad estructural proporcionada por las densas agregaciones de los rodolitos y sus fragmentos (Kamenos et al 2003, Steller et al 2003, Foster et al 2007).…”

Section: Diversidad De Macroalgas Asociada Con Un Manto De Rodolitos unclassified

“…It has been found that the diversity of organisms associated with rhodoliths is related to thallus size, complexity, and hardness in branched forms of rhodoliths. Some environmental factors such as water motion, light availability, sedimentation, and depth affect rhodolith size, morphology, stability, and distribution (Steller and Foster 1995, Harris et al 1996, Basso 1998. The diversity in the rhodolith surrounding sediments appears to be related to the structural complexity provided by the dense aggregations of the rhodoliths and their fragments (Kamenos et al 2003, Steller et al 2003, Foster et al 2007.…”

Section: Introductionmentioning

confidence: 99%

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Seaweed diversity associated with a Brazilian tropical rhodolith bed

et al. 2010

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ABSTRACT. This study describes the predominantly tropical, subtidal seaweed populations growing on rhodoliths between 4 and 18 m depth in the southern part of Espírito Santo State (Brazil). Qualitative and quantitative sampling revealed species-rich algal communities, comprising 167 species. Three species of rhodophytes represent new records for the Brazilian marine flora (Lithothamnion muelleri, Scinaia aborealis, and Mesophyllum engelhartii). Marked seasonal differences in fleshy algal species composition and abundance were related to seasonal instabilities caused by winter-storm disturbance over the rhodolith beds. In relation to depth, rhodolith density appears to be an important factor for the variation in the abundance of fleshy algae. The rhodolith community is composed of at least seven nongeniculate crustose coralline algal species. Rhodolith beds in southern Espírito Santo State, in an area of 150 km 2 , provide an important habitat for epibenthic communities, supporting 25% of the known macroalgal species richness along the Brazilian coast.Key words: rhodoliths, marine algae of Brazil, benthic algal community, Espírito Santo State, crustose coralline algae. RESUMEN.Se describen las poblaciones de las macroalgas submareales predominantemente tropicales que crecen sobre rodolitos entre 4 y 18 m de profundidad en la parte sur del estado de Espírito Santo (Brasil). Muestreos cualitativos y cuantitativos revelaron comunidades ricas en especies de algas, incluyendo 167 especies. Tres especies de rodofitas son nuevas adiciones a la flora marina de Brasil (Lithothamnion muelleri, Scinaia aborealis y Mesophyllum engelhartii). Las marcadas diferencias estacionales en la composición y abundancia de especies de algas carnosas se relacionaron con la inestabilidad causada por el disturbio de tormentas invernales sobre los mantos de rodolitos. En cuanto a la profundidad, la densidad de rodolitos parece ser un factor importante para la variación en la abundancia de algas carnosas. La comunidad de rodolitos está formada por al menos siete especies de algas coralinas no geniculadas. Se demostró que los mantos de rodolitos, en un área de 150 km 2 , proporcionan un hábitat importante para las comunidades bentónicas, manteniendo 25% de la riqueza de especies de macroalgas conocidas para la costa brasileña.Palabras clave: rodolitos, algas marinas de Brasil, comunidad algal bentónica, estado de Espírito Santo, algas coralinas incrustantes.

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Section: Diversidad De Macroalgas Asociada Con Un Manto De Rodolitos unclassified

Section: Introductionmentioning

confidence: 99%

Seaweed diversity associated with a Brazilian tropical rhodolith bed

et al. 2010

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“…The environmental conditions that normally vary with depth, such as light, sedimentation and water motion, can affect the rhodolith beds´ characteristics such as vitality, associated fauna/flora diversity and benthic abundance directly FOSTER, 1995;BASSO, 1998;RIOSMENA-RODRIGUEZ et al, 1999;WILSON et al, 2004;HINOJOSA-ARANGO et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Rhodolith bed structure along a depth gradient on the northern coast of bahia state, brazil

et al. 2010

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A B S T R A C TThe aim of this study was to determine the structure of a rhodolith bed along a depth gradient of 5 to 25 m in the shelf in front of Salvador City, a region of northeastern Brazil. The dimensions, morphology and coralline algae composition of the rhodoliths were analyzed, as well as the vitality, density, and associated flora of the bed at three depths: 5, 15 and 25 m. Samples were obtained by SCUBA divers in summer 2007. Five rhodolith-forming taxa were identified: Sporolithon episporum, Lithothamnion brasiliense, Lithothamnion superpositum, Mesophyllum erubescens, and Lithophyllum sp. The encrusting growth form and the spherical shape were predominant at all depths. Rhodolith dimensions and vitality decreased and the density increased from the shallow to the deepest zones. Fifty-six macroalgal species were found as rhodolith-associated flora. The shallower depth presented higher values for macroalgal biomass and number of species. These results associated with other recent rhodolith bed descriptions indicate that the pattern of Brazilian rhodolith bed structure along depth gradients may be related to a combination of the extent and slope of the continental shelf. R E S U M OO objetivo deste estudo foi determinar a estrutura de um banco de rodolitos ao longo de um gradiente de profundidade na plataforma em frente à cidade de Salvador, nordeste brasileiro. Foram analisadas as dimensões, a forma e composição das algas calcárias dos rodolitos, bem como a vitalidade, densidade e flora associada ao banco, em três profundidades: 5, 15 e 25 m. As amostras foram obtidas por meio de mergulho autônomo no verão de 2007. Cinco espécies de algas calcárias formadoras de rodolito foram identificadas: Sporolithon episporum, Lithothamnion brasiliense, Lithothamnion superpositum, Mesophyllum erubescens e Lithophyllum sp. A forma de crescimento incrustante e a forma esférica foram predominantes em todas as profundidades. Houve uma redução da dimensão e vitalidade dos rodolitos e um aumento da densidade com a profundidade. Cinqüenta e seis espécies de macroalgas foram encontradas como flora associada aos rodolitos. A profundidade mais rasa apresentou os maiores valores de biomassa e número de espécies de macroalgas. Esses resultados, associados com outras descrições recentes de bancos de rodolitos, indicam que o padrão estrutural desses bancos no Brasil, ao longo de gradientes de profundidade, pode estar relacionado a uma combinação da extensão e da inclinação da plataforma continental.

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“…This matrix provides habitat for diverse assemblages of invertebrates and algae (Cabioch, 1969;Keegan, 1974;Steller et al, 2003). Rhodolith beds are one of the major nearshore biogenic sediment producers (Mabesone et al, 1972;Wilson and Bosence, 2003), and are useful for the interpretation of distinct paleo-environments (Carannante et al, 1988;Freiwald et al, 1991;Foster et al, 1997;Basso, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…Individual rhodoliths might be formed by a single species (Payri, 1997;Riosmena-Rodríguez et al, 1999) or a group of species (Basso, 1998). In turn rhodolith beds can be composed of a single dominant species ex.…”

Section: Introductionmentioning

confidence: 99%

Rhodolith Bed Composition in the Southwestern Gulf of California, Mexico

Yabur-Pacheco¹,

Riosmena‐Rodríguez²

2007

Publ. SMBL. SPS

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The composition of rhodolith beds, relative abundance of species and growth-forms, was evaluated in relation to a depth gradient and substratum along the southwestern Gulf of California. Replicate transects were established in twelve rhodolith beds to evaluate the species and growth form distribution in relation to depth (2-7, 7-12 and 12-20 m) and habitat (sand vs. rock). Four species with four growth-forms were determined: Lithophyllum margaritae which ranged in growth-form from fruticose, fructifoliose to foliose; Lithothamnion muelleri where the growthform range was lumpy to fruticose; in both Neogoniolithon trichotomum and Mesophyllum engelhartii where only fruticose growth-form was observed. Lithophyllum margaritae was the most abundant species in relation to depth in the sandy habitat and Lithothamnion muelleri was dominant in the shallow rocky areas. The presence of N. trichotomum was limited to shallow sandy beds and M. engelhartii was limited to the deeper areas. Growth-forms also showed a variation with depth and substrata, in where fruticose forms dominate in sandy areas, lumpy forms dominate in rocky habitats and foliose forms were more abundant in the deeper areas. The differences in the abundance of each species and growth form might be explained by a combination of biological features; growth rate, density of reproductive structures and calcification rate in relation to environmental features such substrate type (rock vs. sand), water motion and light.

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Deep rhodolith distribution in the Pontian Islands, Italy: a model for the paleoecology of a temperate sea

Cited by 196 publications

References 9 publications

Seaweed diversity associated with a Brazilian tropical rhodolith bed

Seaweed diversity associated with a Brazilian tropical rhodolith bed

Rhodolith bed structure along a depth gradient on the northern coast of bahia state, brazil

Rhodolith Bed Composition in the Southwestern Gulf of California, Mexico

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