Spatial and temporal changes in interstitial meiofauna on a sandy ocean beach of South America

Albuquerque, Elaine Figueiredo; Pinto, Ana Paula Brandão; Perez, Antonieta d'Alcântara de Queiroz; Veloso, Valéria Gomes

doi:10.1590/s1679-87592007000200005

Cited by 29 publications

(31 citation statements)

References 25 publications

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“…Populational genetics or phylogeographic studies from meiofauna species are still underrepresented when considering the large diversity in the Brazilian coast (Winston and Migotto 2005;Albuquerque et al 2007;Di Domenico et al 2009;Venekey et al 2010). In this study, we analyzed patterns of genetic diversity based on mtDNA sequences in four widespread Ototyphlonemertes species collected along the Brazilian coast: O. erneba Corrêa (1950) Corrêa (1954) (representative of the Lactea morph), all of them easily distinguishable morphologically.…”

Section: Introductionmentioning

confidence: 99%

Worms without borders: genetic diversity patterns in four Brazilian Ototyphlonemertes species (Nemertea, Hoplonemertea)

2011

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Understanding the evolutionary processes from recent demographic history is especially difficult for interstitial organisms due to their poorly known natural history. In this study, the genetic variation and population history of the four Ototyphlonemertes (Diesing in Sitz ber Math Nat Kl Akad Wiss Wien 46:413-416, 1863) species were evaluated from samples collected along the Brazilian coast (between 27°31 0 S and 13°00 0 W) in 2006. The mitochondrial region cytochrome c oxidase subunit 3 (COX3) is analyzed to assess the genetic variation of these dioecious species. Although these species have a sympatric distribution along the coast, our data suggest that their levels of differentiation and their demographic histories differ sharply. There is strong evidence of gene flow among demes in O. erneba and O. evelinae, and their level of structuring is much lower than for the other two species. Indeed, the COX3 fragment reveals cryptic lineages in O. lactea and O. parmula. The results seem to contradict the high genetic structuring and low intrapopulational variability expected with the ecological constriction and habitat discontinuity faced by these organisms, meaning that there might be gene flow among populations or their dispersal capability has been underestimated.

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Section: Introductionmentioning

confidence: 99%

Worms without borders: genetic diversity patterns in four Brazilian Ototyphlonemertes species (Nemertea, Hoplonemertea)

2011

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“…Intertidal zones have been considered to be physically stressful environments, where meiofaunal communities are subjected to a complex array of environmental factors (Hulings & Gray, 1976;Kotwicki et al, 2005;Albuquerque et al, 2007;CovazziHarriague et al, 2013;Kotwicki et al, 2014). Temperature can affect the distribution of meiofauna either directly, e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Distribution and diversity of meiofauna are affected by several abiotic and biotic factors acting on different spatial scales, from the main geographical-related gradients (i.e. temperature, salinity) (Hulings & Gray, 1976;Soltwedel, 2000) to local physical-chemical variables, in particular in exposed and unstable environments, like intertidal zones (Albuquerque et al, 2007;Kotwicki et al, 2014). However, most of the studies on meiofaunal distribution did not show a clear latitudinal pattern (Kotwicki et al, 2005;Gobin & Warwick, 2006).…”

Section: Introductionmentioning

confidence: 99%

Influence of environmental factors and biogenic habitats on intertidal meiofauna

et al. 2017

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This study investigated the influence of physical and chemical conditions and biotic factors on the distribution and diversity of meiofauna in intertidal zone along a geographical gradient. At 11 sites along the Italian coast, we studied the concurring role of environmental variables, trophic resources and the presence of habitat-forming species (macroalgae vs. mussels) in controlling the meiofaunal communities. The increase of water temperature combined with local thermal conditions was associated with a decrease in nematodes and copepods, with a consequent decrease in meiofaunal abundance towards the south. However, the increase in salinity, as geographical gradient decreases, and local thermal conditions favoured the settlement of a greater number of taxa, influencing communities' composition. The presence of macroalgae or mussels differently influenced the community structure of meiofauna on intertidal substrates and their response to environmental factors. From our results, the presence of macroalgae coverage appeared to reduce the impact of thermal stress on meiofauna and was associated with higher levels of meiofaunal diversity with respect to mussels. This work highlighted the importance of considering the interplay among biotic and abiotic factors, resulting in local combinations of environmental conditions, in order to understand the pattern of diversity and distributions of marine organisms.

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“…Most of these studies sought to understand the meiofauna distribution in relation to physicochemical variables. Granulometry is the variable that best explains the meiofauna community in almost all pristine areas (MEDEIROS et al, 1992;ALBUQUERQUE et al, 2007) as well as in organic polluted areas (MARIA et al, 2013a); however, the degree of organic pollution affects the fauna to a different extent according to the concerned taxa, e.g. copepods are more sensitive to pollution and decrease their density while nematodes increase it (OLIVEIRA; SOARES-GOMES, 2003).…”

Section: Southeastmentioning

confidence: 99%

State of the art of the meiofauna of Brazilian Sandy Beaches

2016

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In Brazil, meiofauna studies began in the middle of last century, but they adopted a purely taxonomical approach, describing species from various zoological groups. After this first step, this benthic group was largely neglected until the end of the 20th century when ecological studies began. We here provide a brief review of present knowledge of the meiofauna found on Brazilian sandy beaches to provide information for ReBentos (Coastal Benthic Habitats Monitoring Network). Our methodology consisted of a bibliographic survey undertaken using different datasets (Web of ScienceTM, SCOPUS, Google Scholar and Lattes Plataform). For the survey, we considered only those studies published till early 2015. Our analysis showed that the number of meiofauna studies has increased over the last two decades, though they are mainly still concentrated on the Southeast of Brazil. These studies aim to explain the distribution pattern of the meiofauna of the intertidal region of sandy beaches. Based on the results, we presented a discussion of three main topics, i.e., (a) current knowledge of Brazilian sandy beach meiofauna, (b) sampling strategies for monitoring of the meiofauna, and (c) use of the meiofauna as a tool to assess climate change. We trust that this brief review will be useful as a starting point for the delineation of further climate change investigations into sandy beach meiofauna.

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Spatial and temporal changes in interstitial meiofauna on a sandy ocean beach of South America

Cited by 29 publications

References 25 publications

Worms without borders: genetic diversity patterns in four Brazilian Ototyphlonemertes species (Nemertea, Hoplonemertea)

Worms without borders: genetic diversity patterns in four Brazilian Ototyphlonemertes species (Nemertea, Hoplonemertea)

Influence of environmental factors and biogenic habitats on intertidal meiofauna

State of the art of the meiofauna of Brazilian Sandy Beaches

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