Group living and the effects of spatial position in aggregations of Mytilus edulis

Okamura, Beth

doi:10.1007/bf00377054

Cited by 175 publications

(142 citation statements)

References 41 publications

Supporting

Mentioning

133

Contrasting

Unclassified

Order By: Relevance

“…portance of patch size and positions within a patch for mussel growth (Okamura 1986;Svane and Ompi 1993). Although adult mussels are relatively sedentary, juvenile mussels are able to show extensive movement (Toomey et al 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, mussels are known to reorganize in relation to wave disturbance or small-scale differences in food availability (Hunt and Scheibling 2002), a property essential for self-organization to occur. As mussels mature, however, the ability of mussel beds to self-organize will diminish; little within-patch movement has been observed in mussels 120 mm (Okamura 1986). …”

Section: Discussionmentioning

confidence: 99%

“…Within high-density patches, mussels in turn form clumps, in which they are interconnected via byssal threads. The adaptive value of aggregation mainly relates to reduction of wave disturbance and predatory losses (Bertness and Grosholz 1985;Okamura 1986;Cote and Jelnikar 1999;Hunt andScheibling 2001, 2002). Aggregation, however, also imposes disadvantages because depletion of pelagic food in larger patches can severely reduce mussel growth (Newell 1990;Svane and Ompi 1993) and even lead to strongly distorted shell growth (Bertness and Grosholz 1985).…”

Section: Patterning In Young Mussel Bedsmentioning

confidence: 99%

“…A significant body of literature exists that shows that, in soft-sediment or subtidal mussel beds, algal food availability limits intake by mussels (Wildish and Kristmanson 1984;Dolmer 2000;Widdows et al 2002) and mussel growth (Frechette and Bourget 1985;Page and Hubbard 1987;Newell 1990;Muschenheim and Newell 1992;Frechette and Despland 1999;Oie et al 2002). Dislodgment and predation depend strongly on local mussel density (Bertness and Grosholz 1985;Okamura 1986;Cote and Jelnikar 1999;Hunt andScheibling 2001, 2002) because nearby conspecifics are the main substrate for attachment on soft-bottom sediment. The effects of competition are spread out over much larger distances because water depleted in algal stocks by mussels is carried over the mussel bed by the tidal currents.…”

Section: A Simple Spatial Modelmentioning

confidence: 99%

See 3 more Smart Citations

Scale‐Dependent Feedback and Regular Spatial Patterns in Young Mussel Beds

Koppel¹,

Rietkerk²,

Dankers³

et al. 2005

The American Naturalist

237

130

View full text Add to dashboard Cite

In the past decade, theoretical ecologists have emphasized that local interactions between predators and prey may invoke emergent spatial patterning at larger spatial scales. However, empirical evidence for the occurrence of emergent spatial patterning is scarce, which questions the relevance of the proposed mechanisms to ecological theory. We report on regular spatial patterns in young mussel beds on soft sediments in the Wadden Sea. We propose that scale-dependent feedback, resulting from short-range facilitation by mutual protection from waves and currents and long-range competition for algae, induces spatial self-organization, thereby providing a possible explanation for the observed patterning. The emergent self-organization affects the functioning of mussel bed ecosystems by enhancing productivity and resilience against disturbance. Moreover, self-organization allows mussels to persist at algal concentrations that would not permit survival of mussels in a homogeneous bed. Our results emphasize the importance of self-organization in affecting the emergent properties of natural systems at larger spatial scales.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Patterning In Young Mussel Bedsmentioning

confidence: 99%

Section: A Simple Spatial Modelmentioning

confidence: 99%

See 2 more Smart Citations

Scale‐Dependent Feedback and Regular Spatial Patterns in Young Mussel Beds

Koppel¹,

Rietkerk²,

Dankers³

et al. 2005

The American Naturalist

237

130

View full text Add to dashboard Cite

show abstract

“…Unfortunately, it is difficult to resolve, because marine ecologists have tended to concentrate on short-term and experimental investigations of factors which structure communities (Menge & Farrell 1989) and operate within small 'patches' (Frid & Townsend 1989). However, several density-related phenomena have been described in such studies, including density-dependent mortality (Hancock 1973, Beukema 1982, self-thinning (Hughes & Griffiths 1988), density-limited growth (Morrisey 1987, Okamura 1986) and density-related emigration (Ambrose 1986). Therefore there was good reason to believe that a long-term population study would be able to measure the strength of any densitydependent regulatory processes acting on a local population.…”

Section: Introductionmentioning

confidence: 99%

Population dynamics of the mussel Mytilus edulis: density changes and regulation of the population in the Exe estuary, Devon

McGrorty¹,

Clarke²,

Reading³

et al. 1990

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Population dynamics of the intertidal mussel population in the River Exe estuary, Devon (UK) over 7 yr (1976 to 1983) are described. There was no significant trend in adult numbers, and annual variations were small (1.5-fold, minimum to maximum). In contrast, the density of 'spat' mussels (0-year) varied uldely ( l ?~) , suggesting that a strong damping process acted during the first year. Considering just first-year mortality, failure to settle on the beds (k3) had the greatest influence on annual variations in total mortality (K). But losses in the first winter after settlement (k5) were strongly and positively denslty dependent. k3 was inversely density dependent, but only in 6 out of 7 yr. Other first-year losses were independent of density. After the large first-winter mortality (mean 68 %), there were only small gains in summer and small losses in winter for the next 4 yr. Thereafter, increasingly large losses occurred (mean 39 % ) each summer after spawning and each winter (mean 24 ?h), due mainly to bud predation. Some of the over-summer and over-winter changes in adult densities were density dependent, but their effect was small and only served as a 'fine tuning' mechanism keeping densities within very narrow limits. Though mortalities at various stages were correlated with the weather, the main feature of the population was its pronounced stability, due mainly to the powerful regulation acting during the first year on the mussel beds.

show abstract

Growth

2021

Marine Mussels

View full text Add to dashboard Cite

Group living and the effects of spatial position in aggregations of Mytilus edulis

Cited by 175 publications

References 41 publications

Scale‐Dependent Feedback and Regular Spatial Patterns in Young Mussel Beds

Scale‐Dependent Feedback and Regular Spatial Patterns in Young Mussel Beds

Population dynamics of the mussel Mytilus edulis: density changes and regulation of the population in the Exe estuary, Devon

Growth

Contact Info

Product

Resources

About