Interannual Variation of Bivalve Populations on Temperate Tidal Flats

Miyawaki, Dai; Sekiguchi, Hideo

doi:10.2331/fishsci.65.817

Cited by 31 publications

(24 citation statements)

References 22 publications

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“…Its maximum longevity is apparently in the order of 5 years (Yates 1999). While almost no ecological data are available on N. obscurata in its native habitat, one of its highly similar congeners, N. olivacea, is described as very dense (up to 5,000/m 2 ) and associated with sandy sediment (Tsutsumi and Sekiguchi 1996;Miyawaki and Sekiguchi 1999). Additionally, N. obscurata and its congeners are found subtidally to depths of 20 m and are often buried up to 20 cm (Kira 1965 (≈N.…”

Section: Study Organism and Systemmentioning

confidence: 97%

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Physical habitat attribute mediates biotic resistance to non-indigenous species invasion

2002

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A soft-shelled non-indigenous clam, Nuttallia obscurata, has invaded coastal soft-sediment habitats of the northeastern Pacific. In a survey of 35 sites within the San Juan Islands, Washington, USA, Nuttallia was found almost exclusively in sandy substrates, higher in the intertidal than most native clams (>1 m above mean lower low water). The distinctive distribution of Nuttallia suggested that tidal height and sediment composition may be important physical factors that control its refuge availability, regulating its exposure to predation and ultimately the success of its invasion. I tethered Nuttallia for 24 h in the high intertidal where it is typically found and in the low intertidal at an elevation where it was never found. Clams restrained to the surface suffered high mortality from crab predation at both tidal heights, whereas control clams with unrestricted burrowing movement exhibited high mortality rates only in the low intertidal. In a second experiment, I transplanted sediment within and between the two intertidal heights to measure effects of tidal height and sediment type on survival and burial depth of Nuttallia. At both tidal heights all clams placed on mud-cobble substrate, naturally common in the low intertidal, suffered high mortality rates (>60% in 24 h). Nuttallia on loosely packed sand substrate, naturally found in the upper intertidal, survived much better, however, because they buried deeper than in the tightly packed mud. Caged control clams at both tidal heights suffered no mortality. Apparently native predators are mitigating community level impacts of an invader by excluding Nuttallia completely from some beaches with improper sediment characteristics or relegating it in others to a zone not often inhabited by native species, thereby reducing potential competitive interactions. These findings show that a physical habitat characteristic can mediate biotic resistance to an invader and thus control invasion success and community-level impacts. Generally, such physical-biological interactions may explain some of the reported site-to-site variability in invasion success, as well as the patchy distribution of many soft-sediment infaunal species.

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Section: Study Organism and Systemmentioning

confidence: 97%

“…Additionally, N. obscurata and its congeners are found subtidally to depths of 20 m and are often buried up to 20 cm (Kira 1965 (≈N. solida);Habe 1968;Yamada 1995;Miyawaki and Sekiguchi 1999).…”

Section: Study Organism and Systemmentioning

confidence: 99%

Physical habitat attribute mediates biotic resistance to non-indigenous species invasion

2002

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“…Causes of larval mortality are variable and can differ from year to year (Ayers 1956), which can have a large effect on the intensity of settlement in a given year. Large peaks in density of larvae have been known to strongly contribute to the establishment of benthic bivalve populations (Miyawaki and Sekiguchi 1999).…”

Section: Abundance and Distribution Of Recent Settlersmentioning

confidence: 99%

Settlement and Recruitment Patterns of the Soft-Shell Clam, Mya arenaria, on the Northern Shore of the Bay of Fundy, Canada

Bowen

Hunt

2009

Estuaries and Coasts

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To examine the roles of settlement and early postsettlement processes in the recruitment of the soft-shell clam, Mya arenaria, abundance of recent settlers and juveniles was monitored over two field seasons at four locations on the northern shore of the Bay of Fundy in New Brunswick, Canada. Results showed great spatial and temporal variability in patterns of settlement. M. arenaria appeared to become highly vulnerable to postsettlement processes at a shell length of approximately 2 mm. Postsettlement processes drastically altered patterns of settlement less than 1 year after they were established. Results suggest that local factors at specific sites within the Bay of Fundy, such as hydrodynamics, larval behavior, and early postsettlement events, likely control the abundance of juvenile clams. Additionally, postsettlement events are extremely important in shaping M. arenaria populations in this area. Very few mature adult clams greater than 50 mm in shell length were found at any sampling sites, and no relationship was found between abundance of setters and density of juveniles and adults.

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“…This information is valuable for understanding the spatial and temporal variation in larval settlement of the clam in the field (Miyawaki and Sekiguchi, 1999;Tezuka et al, 2012;Toba et al, 2007Toba et al, , 2011Williams, 1980), which is necessary for understanding variation in the population abundance along with post-settlement growth and mortality.…”

Section: Introductionmentioning

confidence: 97%

Effect of salinity and substrate grain size on larval settlement of the asari clam (Manila clam, Ruditapes philippinarum)

Tezuka

Kanematsu

Asami

et al. 2013

Journal of Experimental Marine Biology and Ecology

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Interannual Variation of Bivalve Populations on Temperate Tidal Flats

Cited by 31 publications

References 22 publications

Physical habitat attribute mediates biotic resistance to non-indigenous species invasion

Physical habitat attribute mediates biotic resistance to non-indigenous species invasion

Settlement and Recruitment Patterns of the Soft-Shell Clam, Mya arenaria, on the Northern Shore of the Bay of Fundy, Canada

Effect of salinity and substrate grain size on larval settlement of the asari clam (Manila clam, Ruditapes philippinarum)

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