Population dynamics and secondary production of Euzonus furciferus Ehlers (Polychaeta, Opheliidae) in an exposed sandy beach of Southern Brazil

Souza, José Roberto Botêlho de; Borzone, Carlos Alberto

doi:10.1590/s0101-81752007000400034

Cited by 27 publications

(36 citation statements)

References 10 publications

(9 reference statements)

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“…The decline in population of T. furcifera in the urbanized sector could be related to natural fluctuations; however, Souza and Borzone (2007), on the Atami beach (4 km from Shangri-lá), indicated that the reproductive period of this species occurs from January to August (summer to winter). This species has characteristics that can aggravate the damage caused by human trampling such as rather rigid body structure, sedentary behavior, movement virtually restricted to the surface substrate excavation within the sediment, in addition to not having the habit of building tubes (typical structures of many polychaete species) which directly absorb any physical disturbance.…”

Section: Discussionmentioning

confidence: 97%

“…Polychaetes of the genus Scolelepis are typical and very abundant organisms on intertidal sandy beaches of Paraná (BORZONE et al, 1996;SOUZA;BORZONE, 2000;BARROS et al, 2001). This deposit filter feeder may be considered less vulnerable to the impacts assessed, as it inhabits the lower zone, subject to less recreational activity than the intermediate and upper zones of the beach.…”

Section: Discussionmentioning

confidence: 99%

“…Most studies conducted on sandy beaches seek to associate spatial and temporal variations that occur in the macrobenthic communities and populations with environmental parameters and/or biological processes (BORZONE et al, 1996;SOUZA, 1997;SOUZA;BORZONE, 2000;BARROS et al, 2001;SOUZA;BORZONE, 2007;ALVES;PEZZUTO, 2009). Few studies aim to assess the consequences of human disturbances on population processes and community structure on sandy beaches (LERCARI; DEFEO, 2003).…”

Section: Introductionmentioning

confidence: 99%

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Human impact on the benthic macrofauna of two beach environments with different morphodynamic characteristics in southern Brazil

et al. 2012

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A B S T R A C TPollution, exploitation of resources, erosion and recreational activities produce the most common impacts that somehow alter the natural balance of beach ecosystems. The aim of this study was to compare the richness and abundance of the benthic macrofauna of two sectors, one non-urbanized and the other urbanized, on each of two morphodynamically different beaches. Sectors of each beach were analyzed taking into account morphodynamic, anthropogenic (recreational activities) and ecological aspects. Morphodynamically, one of the beaches presented sediment formed of fine sand with a gentle slope and morphodynamism with dissipative characteristics. The other was of sediment formed of medium sand with a steep profile and of intermediate to reflective morphodynamic characteristics. On both beaches during the summer, the urbanized sector was frequented by a greater number of users than the non-urbanized sector. On the beach with dissipative morphodynamism, negative relationships were observed between user abundance and the species Bledius bonariensis, Donax hanleyanus, Thoracophelia furcifera, Excirolana armata, Phoxocephalopsis sp. and Tholozodium rhombofrontalis. On the beach with intermediate to reflective morphodynamics, low abundances of Atlantorchestoidea brasiliensis and Excirolana braziliensis were recorded in the urbanized sector. Thus the results of this study suggest the use of certain species as indicators of human impacts on beach ecosystems. R E S U M OPoluição, exploração de recursos, erosão e atividades recreativas são os impactos mais comuns que de alguma forma alteram o equilíbrio natural do ecossistema praial. O objetivo deste trabalho foi comparar a riqueza e a abundância da macrofauna bentônica entre um setor não urbanizado e outro urbanizado de duas praias morfodinamicamente distintas. Os setores de cada praia foram analisados levando em consideração aspectos morfodinâmicos, antrópicos (atividades recreativas) e ecológicos. Morfodinamicamente, uma das praias apresentou sedimentos formados por areia fina, suave inclinação e morfodinamismo com características dissipativas. A outra praia apresentou sedimentos formados por areia média, perfil íngreme e características morfodinâmicas entre intermediárias a refletivas. Em ambas as praias, durante o verão, o setor urbanizado apresentou maior abundância de usuários do que o setor não urbanizado. Na praia com morfodinamismo dissipativo, relações negativas foram observadas entre a abundância de usuários e a dos organismos Bledius bonariensis, Donax hanleyanus, Thoracophelia furcifera, Excirolana armata, Phoxocephalopsis sp. e Tholozodium rhombofrontalis. Já na praia com morfodinamismo intermediário a refletivo, foram registradas baixas abundâncias de Atlantorchestoidea brasiliensis e Excirolana braziliensis no setor urbanizado. Assim, os resultados do presente estudo sugerem a utilização de algumas espécies como indicadores de impactos antrópicos nos ecossistemas praiais.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Human impact on the benthic macrofauna of two beach environments with different morphodynamic characteristics in southern Brazil

et al. 2012

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“…The population dynamics and the factors affecting the growth and secondary production of C. capitata have been studied by WARREN (1976), TENORE (1977TENORE ( , 1981TENORE ( , 1982, CHESNEY (1985), FORBES & LOPEZ (1987, 1990a, TSUTSUMI (1987TSUTSUMI ( , 1990, GRÉMARE et al (1989), TSUTSUMI et al (1990), BRIDGES et al (1994, BRIDGES (1996), MARTIN & GRÉMARE (1997) and MÉNDEZ et al (1997), and for other polychaete families by ZAJAC (1991), SANTOS (1991SANTOS ( , 1994, AMBROGI et al (1993), LARDICCI et al (1997), OMENA & AMARAL (2000) and SOUZA & BORZONE (2000), among others. These kinds of studies on sandy beaches are important for better understanding of the community structure in this ecosystem (HOLLAND & POLGAR, 1976).…”

Section: Palavras-chavementioning

confidence: 99%

Morphometric analysis of Capitella capitata (Polychaeta, Capitellidae)

Pardo

Teixeira

Amaral

2010

Iheringia, Sér. Zool.

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ABSTRACT. Accurate size measurements are fundamental in characterizing the population structure and secondary production of a species. The purpose of this study was to determine the best morphometric parameter to estimate the size of individuals of Capitella capitata (Fabricius, 1780). The morphometric analysis was applied to individuals collected in the intertidal zones of two beaches on the northern coast of the state of São Paulo, Brazil: São Francisco and Araçá. The following measurements were taken: the width and length (height) of the 4th, 5th and 7th setigers, and the length of the thoracic region (first nine setigers). The area and volume of these setigers were calculated and a linear regression analysis was applied to the data. The data were log-transformed to fit the allometric equation y = ax b into a straight line (log y = log a + b * log x ). The measurements which best correlated with the thoracic length in individuals from both beaches were the length of setiger 5 (r 2 = 0.722; p<0.05 in São Francisco and r 2 = 0.795; p<0.05 in Araçá) and the area of setiger 7 (r 2 = 0.705; p<0.05 in São Francisco and r 2 = 0.634; p<0.05 in Araçá). According to these analyses, the length of setiger 5 and/or the area of setiger 7 are the best parameters to evaluate the growth of individuals of C. capitata. KEYWORDS.Capitellidae, Capitella capitata, beaches, intertidal, morphometry. RESUMO. Análise morfométrica deCapitella capitata (Polychaeta, Capitellidae). Medidas de tamanho precisas são fundamentais para a caracterização da estrutura populacional e produção secundária de uma espécie. O objetivo deste estudo foi determinar o melhor parâmetro morfométrico para estimar o tamanho de indivíduos de Capitella capitata (Fabricius, 1780). A análise morfométrica foi aplicada em indivíduos coletados na zona entremarés de duas praias da costa norte do estado de São Paulo, Brasil: São Francisco e Araçá. Foram efetuadas as seguintes medidas: a largura e comprimento dos setígeros 4, 5 e 7, e o comprimento da região torácica. A área e o volume destes setígeros foram calculados e uma análise de regressão linear foi aplicada a estes dados. Os dados foram transformados em logaritmo para ajustar a equação alométrica y = ax b em uma reta (log y = log a +b * log x ). As medidas que apresentaram melhor correlação com a região torácica (nove primeiros setígeros) nos indivíduos das duas praias foram o comprimento do setígero 5 (r 2 = 0,722; p<0,05 em São Francisco e r 2 = 0,795; p<0,05 em Araçá) e a área do setígero 7 (r 2 = 0,705; p<0,05 em São Francisco e r 2 = 0,634; p<0,05 em Araçá). De acordo com estas análises, o comprimento do setígero 5 e/ou a área do setígero 7 são os melhores parâmetros para avaliar o crescimento de indivíduos de C. capitata.

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“…squamata Müller, 1806;S. goodbodyi Jones, 1962, S. lighti Delgado-Blas, 2006e S. gaucha Orensanz-Gianuca, 1974 -e, para algumas dessas espécies, já há informações sobre a dinâmica populacional: S. gaucha (Santos, 1991(Santos, , 1994, S. squamata (Shimizu, 1997;Souza & Borzone, 2000;Leão et al, 2012) e S. goodbodyi e S. chilensis (MacCord & Amaral, 2005.…”

Section: Introductionunclassified

Protocolos para o monitoramento de habitats bentônicos costeiros - Rede de Monitoramento de Habitat Bentônicos Costeiros - ReBentos

Turra¹,

Denadai²

2015

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Population dynamics and secondary production of Euzonus furciferus Ehlers (Polychaeta, Opheliidae) in an exposed sandy beach of Southern Brazil

Cited by 27 publications

References 10 publications

Human impact on the benthic macrofauna of two beach environments with different morphodynamic characteristics in southern Brazil

Human impact on the benthic macrofauna of two beach environments with different morphodynamic characteristics in southern Brazil

Morphometric analysis of Capitella capitata (Polychaeta, Capitellidae)

Protocolos para o monitoramento de habitats bentônicos costeiros - Rede de Monitoramento de Habitat Bentônicos Costeiros - ReBentos

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