Predation: a causal mechanism for variability in intertidal bivalve populations

Richards, M. G.; Huxham, Mark; Bryant, Andrew

doi:10.1016/s0022-0981(99)00075-1

Cited by 63 publications

(36 citation statements)

References 44 publications

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“…It is most likely that a suite of factors acting on different size classes will determine the success of newly settled cohorts, though one factor not adequately addressed is dissolution mortality. Limited evidence suggests that predation on juvenile bivalves is a size-selective process with predators actively selecting for larger individuals (.1 mm; Hunt and Scheibling 1997;Richards et al 1999;Hunt and Mullineaux 2002). It is possible that meiofaunal species may be important predators on newly metamorphosed bivalves (Newell et al 2000), though additional studies are needed in this area.…”

Section: Discussionmentioning

confidence: 99%

Death by dissolution: Sediment saturation state as a mortality factor for juvenile bivalves

Green

Waldbusser

Reilly

et al. 2009

Limnology & Oceanography

182

153

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We show that death by dissolution is an important size-dependent mortality factor for juvenile bivalves. Utilizing a new experimental design, we were able to replicate saturation states in sediments after values frequently encountered by Mercenaria mercenaria in coastal deposits (V aragonite 5 0.4 and 0.6). When 0.2-mm M. mercenaria were reared in sediments at V aragonite 5 0.4 and 0.6, significant daily losses of living individuals occurred (14.0% and 14.4% d 21 , respectively), relative to supersaturated-control sediments (3.9% d 21 ). For 0.4-mm M. mercenaria, significant mortality occurred under the most undersaturated conditions (V aragonite 5 0.4, mortality 5 9.6% d 21 ), although mortality at V aragonite 5 0.6 was not significant (mortality 5 2.7% d 21 ; controlsaturated mortality 5 0.2% d 21 ). For the largest size-class investigated, 0.6 mm, we show significant mortality for clams under the most undersaturated sediments (V aragonite 5 0.4, 2.8% d 21 ). To test if buffered sediments would increase survivorship of juvenile bivalves during periods of recruitment, we manually manipulated sediment saturation state by adding crushed Mya arenaria shell to a mud flat in West Bath, Maine, U.S.A. Although we increased the average sediment saturation state within retrieved cores from V 5 0.25 6 0.01 to only 0.53 6 0.06, numbers of live M. arenaria in buffered sediment increased almost three-fold in 2 weeks. Buffering muds against the metabolic acids that cause lowered saturation states may represent a potentially important management strategy to decrease dissolution mortality.

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Section: Discussionmentioning

confidence: 99%

Death by dissolution: Sediment saturation state as a mortality factor for juvenile bivalves

Green

Waldbusser

Reilly

et al. 2009

Limnology & Oceanography

182

153

View full text Add to dashboard Cite

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“…Predators have strong direct effects on the abundance of juvenile bivalves through consumption (e.g. Micheli 1997, Richards et al 1999, Hunt & Mullineaux 2002, but predation may also have other impacts on prey species. Predators could cause mortality through disturbance or have non-lethal effects by modifying prey behaviour, resulting in reduced growth (Nakaoka 2000) or increased emigration rates (amphipods and polychaetes, Ambrose 1984).…”

Section: Abstract: Predators · Postlarval Dispersal · Bivalves · Sedmentioning

confidence: 99%

Effects of epibenthic predators in flow: transport and mortality of juveniles of the soft shell clam Mya arenaria

Hunt¹

2004

Mar. Ecol. Prog. Ser.

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“…Extremely high mortality (Ͼ98%) is widespread among settling marine bivalves in nearshore deposits, where exponential loss is common within the first several days to weeks following their full recruitment transition from the pelagic larval phase to the benthic juvenile phase (Thorson 1966;Roegner and Mann 1995;Gosselin and Qian 1997;Hunt and Scheibling 1997;Richards et. al.…”

mentioning

confidence: 99%

Dissolution mortality of juvenile bivalves in coastal marine deposits

Green

Jones

Boudreau

et al. 2004

Limnology & Oceanography

162

102

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We evaluate experimentally the effect of carbonate saturation state at the sediment-water interface (SWI) on survivorship of various size classes of the juvenile bivalve Mercenaria mercenaria. Populations of 0.2-mm, 0.3-mm, 1-mm, and 2-mm M. mercenaria were introduced to sediments realistically undersaturated (experimental, saturation state with respect to aragonite ϭ ⍀ aragonite ϭ IMP/K ϭ ϳ0.3) and saturated (control, ⍀ aragonite ϭ ϳ1.5) Ј sp with respect to aragonite in order to evaluate the impact of saturation state and dissolution on survivorship. Linear regression analysis was used to examine mortality within each treatment over time and show significant mortality for each size class in experimental-undersaturated treatments only (P Ͻ 0.05). Mortality rates in experimentalundersaturated sediments were Ϫ11.8, Ϫ4.8, Ϫ1.9, and Ϫ1.1% d Ϫ1 for the 0.2-, 0.3-, 1.0-, and 2.0-mm bivalves, respectively. Analysis of covariance (ANCOVA) was used to examine differences in mortality between treatments over time and show significantly different mortality rates for the 0.2-, 0.3-, and 1-mm individuals (P Ͻ 0.05).

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Predation: a causal mechanism for variability in intertidal bivalve populations

Cited by 63 publications

References 44 publications

Death by dissolution: Sediment saturation state as a mortality factor for juvenile bivalves

Death by dissolution: Sediment saturation state as a mortality factor for juvenile bivalves

Effects of epibenthic predators in flow: transport and mortality of juveniles of the soft shell clam Mya arenaria

Dissolution mortality of juvenile bivalves in coastal marine deposits

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