Deep-water gelatinous rhodophytes from southern Espírito Santo State, Brazil

Guimarães, Sílvia M. P. B.; Amado‐Filho, Gilberto M.

doi:10.1515/bot.2008.048

Cited by 9 publications

(6 citation statements)

References 25 publications

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“…Some species identifi ed in these habitats are red algae with a soft and mucilaginous erect habit. Naccaria corymbosa J. Agardh was the fi rst member of the family Naccariaceae referred to Brazil and growing on rhodoliths (Guimarães & Amado-Filho 2008). In the present study we documented the fi rst record of Reticulocaulis mucosissimus I.…”

Section: Introductionsupporting

confidence: 52%

“…A recent study carried out on the sublittoral marine fl ora of southern Espírito Santo State revealed a diverse and probably ephemeral spring-summer fl ora growing on rhodolith substrata (Amado-Filho et al 2007, Guimarães & Amado-Filho 2008. Some species identifi ed in these habitats are red algae with a soft and mucilaginous erect habit.…”

Section: Introductionmentioning

confidence: 99%

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First record of Reticulocaulis mucosissimus I. A. Abbott (Naccariaceae, Rhodophyta) for the western Atlantic Ocean

Guimarães

Amado‐Filho

2009

Rev. bras. Bot.

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-(First record of Reticulocaulis mucosissimus I. A. Abbott (Naccariaceae, Rhodophyta) for the western Atlantic Ocean). Espírito Santo State lies in the transition region (18°-21° S) between the tropical and subtropical marine-algal provinces and is considered the richest area of the Brazilian fl ora. The subtidal substratum presents extensive areas of rhodoliths associated with a diversifi ed marine biota. A detailed exploration using Scuba diving technique has revealed many little-known and previously unreported taxa that are new to the Brazilian coast. Among the algae recently discovered, Reticulocaulis mucosissimus I. A. Abbott was found at a depth of 25 meters, thus consisting of the second member of the infrequently encountered family Naccariaceae growing in the same region. This work has revealed additional distribution records of this species not yet reported from the western Atlantic. Description of the morphological and reproductive features of the species as well as illustrations and comments are presented.Key words -Brazil, diversity, Espírito Santo State, Naccariaceae, Reticulocaulis mucosissimus RESUMO -(Primeira referência de Reticulocaulis mucosissimus I. A. Abbott (Naccariaceae, Rhodophyta) para o Oceano Atlântico ocidental). O Estado do Espírito Santo situa-se em uma região de transição (18°-21° S) entre as províncias marinhas tropical e subtropical e, é considerada a área mais rica do Brasil quanto a fl ora marinha. A região subtidal apresenta extensas áreas de rodolitos associados com uma biota marinha diversifi cada. Um estudo detalhado através do emprego do mergulho autônomo Scuba está revelando muitos táxons pouco conhecidos e ainda não referidos para a costa brasileira. Entre as algas recentemente descobertas, Reticulocaulis mucosissimus I. A. Abbott foi encontrada em uma profundidade de 25 metros, constituindo-se no segundo representante da família Naccariaceae crescendo na mesma região. De um modo geral, os representantes desta família são difi cilmente encontrados. Este trabalho amplia consideravelmente a distribuição desta espécie que não havia ainda sido referida para o Oceano Atlântico ocidental. A descrição das características morfológicas e reprodutivas da espécie é apresentada, assim como, ilustrações e comentários.

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Section: Introductionsupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

First record of Reticulocaulis mucosissimus I. A. Abbott (Naccariaceae, Rhodophyta) for the western Atlantic Ocean

Guimarães

Amado‐Filho

2009

Rev. bras. Bot.

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“…Ocean acidification will cause carbonate dissolution to increase within rhodolith beds, thus causing major habitat loss for several species. Besides the high diversity of associated organisms, rhodolith beds have been shown as the primary habitat for small-range (endemic) species [21], [37], [38].…”

Section: Discussionmentioning

confidence: 99%

Rhodolith Beds Are Major CaCO3 Bio-Factories in the Tropical South West Atlantic

et al. 2012

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Rhodoliths are nodules of non-geniculate coralline algae that occur in shallow waters (<150 m depth) subjected to episodic disturbance. Rhodolith beds stand with kelp beds, seagrass meadows, and coralline algal reefs as one of the world's four largest macrophyte-dominated benthic communities. Geographic distribution of rhodolith beds is discontinuous, with large concentrations off Japan, Australia and the Gulf of California, as well as in the Mediterranean, North Atlantic, eastern Caribbean and Brazil. Although there are major gaps in terms of seabed habitat mapping, the largest rhodolith beds are purported to occur off Brazil, where these communities are recorded across a wide latitudinal range (2°N - 27°S). To quantify their extent, we carried out an inter-reefal seabed habitat survey on the Abrolhos Shelf (16°50′ - 19°45′S) off eastern Brazil, and confirmed the most expansive and contiguous rhodolith bed in the world, covering about 20,900 km2. Distribution, extent, composition and structure of this bed were assessed with side scan sonar, remotely operated vehicles, and SCUBA. The mean rate of CaCO3 production was estimated from in situ growth assays at 1.07 kg m−2 yr−1, with a total production rate of 0.025 Gt yr−1, comparable to those of the world's largest biogenic CaCO3 deposits. These gigantic rhodolith beds, of areal extent equivalent to the Great Barrier Reef, Australia, are a critical, yet poorly understood component of the tropical South Atlantic Ocean. Based on the relatively high vulnerability of coralline algae to ocean acidification, these beds are likely to experience a profound restructuring in the coming decades.

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“…D. crassa and P. feldmannii were also found in other summer collections, but the remaining species were collected in a single November 2004 sample. Guimarães and Amado-Filho (2008) reported that these algae represent an ephemeral spring-summer element of the wider macroalgae associated with rhodolith beds.…”

Section: Discussionmentioning

confidence: 99%

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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Deep-water gelatinous rhodophytes from southern Espírito Santo State, Brazil

Cited by 9 publications

References 25 publications

First record of Reticulocaulis mucosissimus I. A. Abbott (Naccariaceae, Rhodophyta) for the western Atlantic Ocean

First record of Reticulocaulis mucosissimus I. A. Abbott (Naccariaceae, Rhodophyta) for the western Atlantic Ocean

Rhodolith Beds Are Major CaCO3 Bio-Factories in the Tropical South West Atlantic

Seaweed diversity associated with a Brazilian tropical rhodolith bed

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