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Scale-dependent benthic recolonization dynamics: life stage-based dispersal and demographic consequences
Whitlatch, R.B.; Lohrer, A.M.; Thrush, S.F.; Pridmore, R.D.; Hewitt, J.E.; Cummings, V.J.; Zajac, R.N. (1998). Scale-dependent benthic recolonization dynamics: life stage-based dispersal and demographic consequences, in: Baden, S. et al. Recruitment, colonization, and physical-chemical forcing in marine biological systems: Proceedings of the 32nd European Marine Biology Symposium, held in Lysekil, Sweden, 16-22 August 1997. Developments in Hydrobiology, 132: pp. 217-226. https://dx.doi.org/10.1007/978-94-017-2864-5_18
In: Baden, S. et al. (1998). Recruitment, colonization, and physical-chemical forcing in marine biological systems: Proceedings of the 32nd European Marine Biology Symposium, held in Lysekil, Sweden, 16-22 August 1997. Developments in Hydrobiology, 132. Springer Science+Business Media: Dordrecht. ISBN 978-0-7923-5273-0; e-ISBN 978-94-017-2864-5. IX, 380 pp. https://dx.doi.org/10.1007/978-94-017-2864-5, more
In: Dumont, H.J. (Ed.) Developments in Hydrobiology. Kluwer Academic/Springer: The Hague; London; Boston; Dordrecht. ISSN 0167-8418, more
Related to:
Whitlatch, R.B.; Lohrer, A.M.; Thrush, S.F.; Pridmore, R.D.; Hewitt, J.E.; Cummings, V.J.; Zajac, R.N. (1998). Scale-dependent benthic recolonization dynamics: life stage-based dispersal and demographic consequences. Hydrobiologia 375: 217-226. https://dx.doi.org/10.1023/A:1017084217011, more

Available in  Authors 
Document type: Conference paper

Keywords
    Biological settlement > Larval settlement
    Developmental stages
    Life history
    Population dynamics
    Population functions > Recruitment
    Boccardia syrtis (Rainer, 1973) [WoRMS]; Polydora cornuta Bosc, 1802 [WoRMS]
    Marine/Coastal

Authors  Top 
  • Whitlatch, R.B.
  • Lohrer, A.M.
  • Thrush, S.F.
  • Pridmore, R.D.
  • Hewitt, J.E.
  • Cummings, V.J.
  • Zajac, R.N.

Abstract
    Soft-sediment recruitment dynamics are dependent upon two sources of colonists; larvae transported from the water column and post-settlement movement of juvenile and/or adult life-stages across the seabed. Differences in the relative dispersal ability of the different life-stages into disturbed patches of habitat should vary predictably with the spatial scale of the disturbance. Smaller patches with a greater edge:surface area ratio should be more influenced by the post-settlement colonist pool than larger patches possessing a smaller edge:surface area ratio. A life stage-based recolonization model, using a Polydora cornuta life table, has been developed to describe how differences in the immigration rates of larvae, juveniles and adults can influence within-patch recovery times. Model results indicate that immigration of adult stages into disturbed patches has the least influence on patch recovery time. In contrast, post-settlement juvenile stages generally has a pronounced effect on patch population dynamics. Experimental evidence of scale-dependent migration of different life-stages to disturbed patches is also presented for the spionid polychaete Boccardia syrtis. Future research on scale-dependent recolonization dynamics in soft-sediment habitats should focus on acquisition of within-patch demographic data in order to more fully understand the importance of post-settlement life-stage movement in regulating population and community dynamics.

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