Comparison of resistivity to transport by wave action in several polychaete species on an intertidal sand flat

Tamaki, Akio

doi:10.3354/meps037181

Cited by 63 publications

(23 citation statements)

References 9 publications

(18 reference statements)

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“…Segundo Tamaki (1987) o transporte passivo pela ação das ondas e a influência das correntes foram os fatores físicos determinantes na distribuição de alguns grupos habitantes da fauna de sedimentos, principalmente poliquetas. Oliver et al (1980apud Hall, 1994 constataram em um estudo sobre a distribuição da fauna de poliquetas e sua relação com distúrbios físicos causados por ondas e correntes na costa da Califórnia (EUA), que no inverno ocorre um decréscimo no número destes animais, pois é quando a atividade das ondas é mais intensa.…”

Section: Resultsunclassified

“…Diferentes espécies e principalmente diferentes grupos taxonômicos apresentam respostas distintas em função do seu hábito de vida, mobilidade e capacidade de suportar o impacto físico, com alguns grupos ou espécies podendo inclusive se manter em suspensão durante o período de maior influência das ondas (Grant, 1980;Tamaki, 1987). Não obstante, ainda são escassas informações quanto às alterações na estabilidade estrutural da comunidade refletidas a longo prazo e quais as conseqüências de ressacas extremamente intensas de longa periodicidade.…”

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Variação temporal da macrofauna bentônica sublitoral da praia da Urca (RJ) após a ocorrência de ressacas

Sola

Paiva

2001

Rev. Bras. Oceanogr.

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Section: Resultsunclassified

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Variação temporal da macrofauna bentônica sublitoral da praia da Urca (RJ) após a ocorrência de ressacas

Sola

Paiva

2001

Rev. Bras. Oceanogr.

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“…However, significant faunal dispersal can still occur under very low energy wave conditions (Norkko et al 2001). Macrofaunal species with different modes of living within the sediment will have different potentials to be moved by waves (Tamaki 1987), and thus a combination of behaviour and resistance to transport by waves may result in species-dependent differences in colonisation. At the Sheltered site, juvenile stages of the common bivalves (Nucula hartvigiana, Macomona liliana and Austrovenus stutchburyi) contributed to recovery, but only in low numbers, whereas the orbinid Scoloplos cylindrifer was the numerical dominant in the partial recovery process.…”

Section: Infaunal Colonisationmentioning

confidence: 99%

Smothering of estuarine sandflats by terrigenous clay: the role of wind-wave disturbance and bioturbation in site-dependent macrofaunal recovery

Norkko¹,

Thrush²,

Hewitt³

et al. 2002

Mar. Ecol. Prog. Ser.

122

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Sediment run-off from land has been recognised as a threat to the biodiversity of shallow estuarine and coastal areas. Extreme rainfall events can cause flooding and landslides, which may result in rapid deposition of fine terrigenous sediments and have serious impacts on benthic communities. We designed a field experiment to study the response of intertidal benthos to such depositions of terrigenous clay. The experiment was conducted at 2 contrasting intertidal sites: a sheltered muddy sand habitat and an exposed sand habitat influenced by wind waves. Terrigenous clay (50% water content) was deposited in replicated experimental plots (2 m diameter) at each site in layers 0, 3, 6 or 9 cm thick. The initial response of the resident macrofauna and subsequent recolonisation was monitored over a period of 408 d. Physical and chemical properties of the experimental plots and wave climate at each site were also measured. The experiment demonstrated highly deleterious effects of catastrophic terrigenous clay deposition on estuarine macrobenthic communities. At both sites following clay deposition, the numbers of individuals were reduced by more than 50% after 3 d and by more than 90% after 10 d, irrespective of clay thickness. Mud crabs Helice crassa were the only animals able to emerge through the clay layer. They also exhibited elevated densities in clay treatments over the course of the experiment. After 28 d, a storm occurred (maximum wave height 0.4 m, period = 6 s) which dispersed the clay deposits at the exposed sandy site. Recolonisation of the surficial sediments was rapid at the exposed site following this wind-wave disturbance. However, deeper-dwelling animals such as large bivalves had not recovered to levels observed in the control plots by the end of the experiment. At the more sheltered muddy sand site, the clay deposition resulted in long-lasting habitat change; Although the clay was gradually broken up and re-colonised by small crabs and surface dwelling macrofauna, recovery was still incomplete 408 d after deposition. The results emphasise the role of wind-wave disturbance and transport of sediments and macrofauna with bedload, and the importance of bioturbation by crabs as facilitators of macrobenthic recovery after disturbance.

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“…This, in turn, is likely to decrease deposit feeder food availability and increase bed load and water column dispersal (e.g. Tamaki 1987, Günther 1992, Commito et al 1995, thus affecting tidal flat deposit feeding assemblage structure and function.…”

Section: Introductionmentioning

confidence: 99%

Diversity, trait displacements and shifts in assemblage structure of tidal flat deposit feeders along a gradient of hydrodynamic stress

Colen¹,

Backer²,

Meulepas³

et al. 2010

Mar. Ecol. Prog. Ser.

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To assess the effect of variability in hydrodynamic stress on benthic assemblages we investigated whether deposit-feeding macrobenthos performs a unimodal response to an intertidal flat hydrodynamic stress gradient, congruent with the intermediate disturbance hypothesis (IDH), and whether this response is related to assemblage-wide biological trait displacements, reflecting species sorting mechanisms. Patterns in diversity and assemblage-wide biological traits were explained to a large extent by hydrodynamic stress and reflected in a significantly differing assemblage structure between stress levels. Our data did not support the IDH, since species richness and diversity peaked at low stress, whereas evenness was lowest at intermediate stress, suggesting that species sorting in response to hydrodynamic stress, rather than competitive exclusion at low stress, drives the diversity stress response. The decrease in species richness and diversity towards the hydrodynamically harsher low intertidal was reflected in the assemblage-wide shifts towards a lower dietary dependency on microalgal carbon and a deeper living position. Intermediate stressed assemblages were associated with a shift towards a more resistant development mode to superficial sediment disturbance. This is suggested to result from species sorting in response to Cerastoderma edule interference from bioturbation, which peaked at intermediate hydrodynamic stress where optimal hydrodynamic conditions for suspension feeders prevail. The present study demonstrated that the alteration of the natural hydrodynamic regime will significantly affect tidal flat benthic community composition and, hence, ecosystem functioning. Additionally, our findings reveal that inhibitory biophysical interactions, such as interference from bioturbation, should be incorporated in environmental stress biodiversity models.

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Comparison of resistivity to transport by wave action in several polychaete species on an intertidal sand flat

Cited by 63 publications

References 9 publications

Variação temporal da macrofauna bentônica sublitoral da praia da Urca (RJ) após a ocorrência de ressacas

Variação temporal da macrofauna bentônica sublitoral da praia da Urca (RJ) após a ocorrência de ressacas

Smothering of estuarine sandflats by terrigenous clay: the role of wind-wave disturbance and bioturbation in site-dependent macrofaunal recovery

Diversity, trait displacements and shifts in assemblage structure of tidal flat deposit feeders along a gradient of hydrodynamic stress

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