Community structure of intertidal meiofauna along a gradient of morphodynamic states on an exposed North Sea beach

Rodríguez, Jonatan

doi:10.1080/00364820310003307

Cited by 17 publications

(15 citation statements)

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“…Moreover, the average meiobenthos densities and number of taxa recorded in the present study compares well with values reported on Atlantic, European beaches (e.g. Moore 1979;Rodríguez 2004;Kotwicki et al 2005a). Despite being in the range of other temperate zone beaches, the data in this work showed higher densities than those found by Renaud-Debyser & Salvat (1963) from the French Atlantic coast, Fenchel et al (1967) in the North Sea and Schmidt (1968) and Schmidt (1969) from Sylt island.…”

Section: Discussionsupporting

confidence: 83%

“…However, more variability was detected, with copepods as the most abundant taxa at six sites. Copepods are usually the most abundant group in areas of coarse sands such as site B2B (Brown & McLachlan 1990;Rodríguez 2004), but in this study copepods were dominant in medium (B4C and B7A) and fine sand sites (B4A, B4B and B6A) too. Even if less frequently, other studies found copepods as dominant taxa in medium ) and fine sands (Moore 1979).…”

Section: Discussionmentioning

confidence: 91%

“…Recently, the number of studies that have included meiobenthos on sandy beaches has increased (e.g. Rodríguez 2004;Kotwicki et al 2005a;Papageorgiou et al 2007;Covazzi et al 2008), but most of them were carried out on oceanic beaches, so there is a lack of knowledge about meiobenthic communities on beaches located in habitats such as rias. Moreover, few works have studied meiobenthic community structure at different spatial scales on sandy beaches.…”

Section: Introductionmentioning

confidence: 98%

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Meiobenthic communities structure at different spatial scales on sandy beaches from a ria environment: The role of abiotic factors

Veiga

Besteiro

Rubal

2011

Marine Biology Research

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This work aimed to study meiobenthic communities at different spatial scales in a Galician estuaryÁria (NW Spain), elucidating the role of abiotic factors on their structure. Rias are transitional environments with brackish habitats on their inner part and fully marine environments in the outer area, and Galician estuarineÁrias are very productive habitats due to upwelling events. Results showed that meiobenthic communities from estuarineÁria beaches, even in the range of other temperate beaches not in rias, reported high number of taxa and density values probably due to the highest primary production associated with estuarineÁria environment. Meiobenthic community variability increased as the scale widens, showing significant differences among almost all the studied beaches. Selected environmental variables were, in general, useful for explaining the variability of the main taxa. Meiobenthic community structures for beaches with different exposure and distances from the inner part of the estuaryÁria were significantly different. However, the environmental variables studied were not able to fully explain the significant variability of whole meiobenthic assemblages. This fact pointed to the possible importance of biological factors structuring meiobenthic communities on beaches within rias.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 98%

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Meiobenthic communities structure at different spatial scales on sandy beaches from a ria environment: The role of abiotic factors

Veiga

Besteiro

Rubal

2011

Marine Biology Research

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“…Nestas ocasiões, segundo RODRÍGUEZ (2004), em praias arenosas com sedimentos finos a meiofauna está exposta à ação erosiva das ondas, que causa a suspensão de grande número de organismos para a coluna d'água, aumentando as taxas de mortalidade. Processos similares parecem ocorrer em Ajuruteua, onde o médiolitoral é erodido com o aumento da energia das ondas e das correntes de marés no período chuvoso, acarretando o aplainamento da face da praia, com grande mobilização de sedimentos para o infralitoral (ALVES & EL-ROBRINI, 2006).…”

Section: Methodsunclassified

“…Devido à interação desses fatores, as praias sofrem mudanças morfológicas e trocas de sedimento com regiões adjacentes em diferentes escalas temporais (SHORT, 2003). Como conseqüência deste presumido rigor ambiental, estas áreas foram muitas vezes consideradas desertos biológicos (MCLACHLAN & BROWN, 2006), e somente em anos recentes foi demonstrado que sua fauna bentônica pode ser diversa e abundante (ARMONIES & REISE, 2000;RODRÍGUEZ, 2004;MCLACHLAN & DORVLO, 2005).…”

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Composição e variabilidade espaço-temporal da meiofauna de uma praia arenosa na região amazônica (Ajuruteua, Pará)

Gomes

Filho

2009

Iheringia, Sér. Zool.

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ABSTRACT. Composition and spatio-temporal variability of meiofauna community on a sandy beach in the Amazon region (Ajuruteua, Pará, Brazil). The present study investigates the spatio-temporal changes in the meiofauna community along the intertidal zone of Ajuruteua Beach, State of Pará, Brazil. Samples were collected during spring tides at different levels of the beach face every two months from April 2003 to February 2004. The material was sampled using a cylindrical corer (3.14 cm 2 ) and fixed with 5% saline formalin. In the laboratory, samples were sieved through a 0.063 mm mesh screen and the retained organisms were identified at higher taxonomic levels, counted and preserved in ethanol 70%. Meiofauna was composed of eight groups: Turbellaria, Nematoda, Tardigrada, Polychaeta, Oligochaeta, Acari, Copepoda and nauplius (Copepoda). Nematoda was the dominant group, representing 74% of total organisms, followed by Copepoda (19%). A clear faunal zonation was observed on three lines parallel to the shoreline, which showed significant differences in abundance, richness and density of the main taxonomic groups. The mean density was lowest in April and highest in December. The highest densities and richness were recorded in the mid intertidal zone, while the lowest values were recorded in the upper and lower intertidal zones. Meiofauna community was most rich and abundant during the dry months, although differences were not significant between climatic periods. The main factors involved in the spatio-temporal variations of meiofauna were wave and tidal action and salinity fluctuations. KEYWORDS.Benthos, meiofauna, community ecology, vertical zonation, Amazon. RESUMO.Este trabalho avalia a variabilidade espaço-temporal da meiofauna do médiolitoral na praia de Ajuruteua, Estado do Pará. As coletas foram realizadas a cada dois meses, entre abril de 2003 a fevereiro de 2004 durante as marés de sizígia, em diferentes zonas da praia. As amostras foram retiradas com um amostrador cilíndrico de 3,14 cm 2 e fixadas em formalina salina a 5%. Em laboratório, as amostras foram passadas em malha de 0,063 mm de abertura e os organismos retidos identificados em nível de grandes grupos taxonômicos, contados e fixados em álcool etílico a 70%. A meiofauna esteve representada por oito grupos: Turbellaria, Nematoda, Tardigrada, Polychaeta, Oligochaeta, Acari, adultos de Copepoda Harpacticoida e juvenis de Copepoda Harpacticoida. Nematoda foi o grupo dominante, representando 74% do total de indivíduos, seguido de Copepoda (19%). Pôde-se observar clara zonação horizontal da fauna, que se distribuiu em três faixas paralelas à linha de praia, com características significativamente distintas quanto à abundância, riqueza e densidade dos principais grupos taxonômicos. No médiolitoral médio foram observados valores significativamente mais elevados de riqueza e abundância, enquanto os valores mais baixos foram registrados no médiolitoral superior e inferior. A comunidade de meiofauna, ainda que não tenha variado significativamente entre períod...

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The role of habitat heterogeneity in structuring the community of intertidal free-living marine nematodes

et al. 2010

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The role of habitat complexity has been widely neglected in the study of meiofaunal community patterns. We studied the intertidal nematode community of a structurally complex macrotidal beach exhibiting contrasting microhabitats (sandbars and runnels) to understand the influence of environmental gradients and habitat heterogeneity in the community structure. We tested whether topographical complexity affected (1) the zonation pattern in terms of abundance and diversity, and (2) local diversity by promoting compartmentalization into distinct faunal groups. Our analyses revealed three major faunal assemblages along the exposure gradient associated to differences in mean grain size and chlorophyll a. Diversity patterns involved a mid-intertidal peak, consistent with the intermediate disturbance hypothesis, and another peak at the limit with the subtidal region, consistent with the transition zone. These results highlight the predominance of environmental gradients in establishing intertidal zonation. However, microhabitats differed in environmental conditions and possessed significantly distinct nematofaunal communities. Runnels featured higher levels of taxonomic and functional diversity, many unique genera, and the community differed from the assemblage at the limit to the subtidal, stressing their role as distinct microhabitats. The nematofauna of the structurally complex beach was more diverse than the one from a homogeneous beach nearby, supporting the hypothesis that structural heterogeneity promotes diversity by compartmentalization and highlighting the importance of microhabitats in the assessment of biodiversity. Contrary to previous predictions, our results indicate potentially high regional marine nematode diversity in the Upper Gulf of California.Electronic supplementary materialThe online version of this article (doi:10.1007/s00227-010-1447-z) contains supplementary material, which is available to authorized users.

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Community structure of intertidal meiofauna along a gradient of morphodynamic states on an exposed North Sea beach

Cited by 17 publications

References 1 publication

Meiobenthic communities structure at different spatial scales on sandy beaches from a ria environment: The role of abiotic factors

Meiobenthic communities structure at different spatial scales on sandy beaches from a ria environment: The role of abiotic factors

Composição e variabilidade espaço-temporal da meiofauna de uma praia arenosa na região amazônica (Ajuruteua, Pará)

The role of habitat heterogeneity in structuring the community of intertidal free-living marine nematodes

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