INTERTIDAL ZONATION IN POPULATIONS OF <i>MYA ARENARIA</i>1

Matthiessen, George C.

doi:10.4319/lo.1960.5.4.0381

Cited by 42 publications

(18 citation statements)

References 4 publications

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“…3). Other species of clams (Donax hanleyanus, Mya arenaria) also preferentially settle in the swash zone, with increasing abundance patterns up the lowest low tide mark and a decrease into he subtidal, similar to our data (Matthiessen, 1960;Cardoso & Veloso, 2003). These clam species also display differences in their size distribution, with smaller individuals settling farther shoreward and larger individuals farther seaward (Matthiessen, 1960;Cardoso & Veloso, 2003).…”

Section: Discussionsupporting

confidence: 70%

Size and Abundance of Pismo Clams in the Intertidal and Subtidal

Greene

2015

symp

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Section: Discussionsupporting

confidence: 70%

Size and Abundance of Pismo Clams in the Intertidal and Subtidal

Greene

2015

symp

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“…Postlarval transport of Mya has been noted in other studies. At another site in Massachusetts, Matthiessen (1960) described temporal changes in the spatial distribution of 2-15-mm Mya, which were similar to changes in the distribution of sediments. In Nova Scotia, Canada, Roegner (1996) found that defaunated plots were recolonized by 1-6-mm Mya, similar to the size of Mya found in our study.…”

Section: Discussionmentioning

confidence: 61%

The roles of predation and postlarval transport in recruitment of the soft shell clam (Mya arenaria)

Hunt

Mullineaux

2002

Limnology & Oceanography

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Rates of mortality and transport of newly settled benthic invertebrates can be very high and potentially have profound effects on patterns of recruitment. We used the soft shell clam Mya arenaria as a model organism to compare the magnitude of rates of postlarval transport and predation on juveniles. We hypothesized that there is a critical size below which spatial variation in abundance of juvenile Mya is hydrodynamically controlled and above which abundance is mainly influenced by mortality, particularly due to epibenthic predators. To test this hypothesis, we examined transport and predation of early juvenile Mya in Barnstable Harbor, Massachusetts, USA. A caging experiment demonstrated that exclusion of epibenthic predators had a large impact on the density and size distribution of juvenile Mya within a few weeks of settlement and disproportionately affected juveniles of Ͼ2-mm shell length. Enclosure of the green crab Carcinus maenas changed the size distribution of Mya but did not significantly affect abundance. We attributed the effect of predator exclusion primarily to juvenile green crabs and fish. Current meter measurements suggested that tidal currents were strong enough to cause bedload transport of sediment and Mya. Measurement of gross and net rates of transport of Mya, using bedload traps and pans of defaunated sediment, confirmed that juveniles up to 5-mm shell length were routinely redistributed by tidal currents, particularly during spring tides. The number of postlarval Mya transported varied among sites and dates and was significantly related to ambient density of Mya and sediment flux. The loss of Mya during the caging experiment was compared to the rate of net flux of Mya due to transport during an intermediate tide. This comparison suggested that the loss due to predation was considerably larger than the flux due to transport for individuals Ͼ2 mm, but that rates of the two processes were more similar for individuals Ͻ2 mm. These experiments indicate that, while predation is likely the ultimate factor controlling abundance and size of juvenile Mya at this site, transport often redistributes individuals, at least at the scale of a tidal flat (10s to 100s of m).Our understanding of recruitment variability of benthic marine invertebrates and its role in population and community dynamics has increased considerably over the last 20 years. Studies often have assumed that recruitment patterns reflect patterns of larval supply or settlement, although there has been increasing recognition of the importance of the early postsettlement period. Patterns set up at the time of settlement may have little effect on the distribution and abundance of adults because newly settled invertebrates usually 1 Current address: Institute of Marine and Coastal Sciences, Rutgers University, 71 Dudley Rd., New Brunswick, New Jersey 08901 (hunt@imcs.rutgers.edu). AcknowledgmentsWe are particularly grateful to Aaron Stepler, Tom Marcotti, and the rest of the Town of Barnstable's Division of Natural Resources for p...

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“…However, observations of such spatial patterns on only 1 sampling occasion cannot give conclusive evidence for migration. The following 3 possible processes can also produce a spatially different body size or age composition in a population: (1) locally differential recruitment of different cohorts (Jumars 1978, Thompson 1982, Tamaki 1985; (2) passive transport of individuals in a size-or age-specific fashion by waves and/or currents (Dales 1952, Matthiessen 1960, Gilbert 1968, Brown 1982, Thompson 1982; (3) locally differential growth and/or mortality of individuals (Stephen 1928, Gibbs 1968, Green 81 Hobson 1970, Thompson 1982, Omori et al 1984. Thus, to confirm migration in a population, it is at least necessary to examine temporal change in the spatial distribution of the size (age) classes of the population.…”

Section: Discussionmentioning

confidence: 99%

Zonation by size in the Armandia sp. (Polychaeta: Opheliidae) population on an intertidal sand flat

Tamaki¹

1985

Mar. Ecol. Prog. Ser.

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Spatial and temporal changes in the body-size composition of a population of Armandia sp. (Opheliidae), a burrowing polychaete species with a planktonic larval phase, are described for an intertidal sand flat in west Kyushu, Japan. From spring to summer 1980, the recruitment of Armandia was by discrete settlement of larvae (every spring tide), which allowed the fate of a particular cohort to be followed easily. At the end of June, when the largest recruitment in the year occurred, the larvae settled exclusively in 2 particular zones. A part of the population emigrated from the settlement zones mainly in an offshore direction with growth of body size generating a size zonation, and the densities of Arrnandia adults became spatially uniform through July and August. The significance of following migration processes of mobile benthos for understanding the structure of soft-sediment benthic communities is discussed.

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INTERTIDAL ZONATION IN POPULATIONS OF MYA ARENARIA1

Cited by 42 publications

References 4 publications

Size and Abundance of Pismo Clams in the Intertidal and Subtidal

Size and Abundance of Pismo Clams in the Intertidal and Subtidal

The roles of predation and postlarval transport in recruitment of the soft shell clam (Mya arenaria)

Zonation by size in the Armandia sp. (Polychaeta: Opheliidae) population on an intertidal sand flat

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