The quick and the dead: larval mortality due to turbulent tidal transport

Marine populations are typically connected over greater spatial scales than their terrestrial counterparts due to many species having a highly dispersive, planktonic larval phase. However, high levels of larval mortality in the plankton may reduce connectivity between populations. The effect of turbulence on larval mortality was investigated under natural conditions in a field experiment. Larvae were collected before and after being subjected to turbulent tidal flow from a marine reserve, with differential mortality being observed between taxa. Thin-shelled veligers of gastropods and bivalves showed significantly increased mortality, while barnacle nauplii and cyprids, bryozoan cyphonaute larvae and polychaete trochophores showed no effect of turbulent tidal transport. Where appropriate, marine reserve design should account for the reduced connectivity between populations associated with turbulent tidal transport between reserve and adjacent areas.

[1]  Claire B Paris-Limouzy,et al.  Scaling of Connectivity in Marine Populations , 2006, Science.

[2]  A. Solow,et al.  Sinking behavior of gastropod larvae (Ilyanassa obsoleta) in turbulence , 2004 .

[3]  D. Schneider,et al.  Effect of turbulence on the mortality of zebra mussel veligers , 2003 .

[4]  S. Palumbi POPULATION GENETICS, DEMOGRAPHIC CONNECTIVITY, AND THE DESIGN OF MARINE RESERVES , 2003 .

[5]  Francesc Peters,et al.  Effects of turbulence on plankton: an overview of experimental evidence and some theoretical considerations , 2000 .

[6]  G. Lamberti,et al.  Mortality of zebra mussel, Dreissena polymorpha, veligers during downstream transport , 1999 .

[7]  A. Wüest,et al.  Comparison of dissipation of turbulent kinetic energy determined from shear and temperature microstructure , 1999 .

[8]  Francesc Peters,et al.  Turbulence generation and measurement: application to studies on plankton* , 1997 .

[9]  J. Simpson,et al.  The Vertical Structure of Turbulent Dissipation in Shelf Seas , 1996 .

[10]  Albert J. Williams,et al.  Estimates of Kinetic Energy Dissipation under Breaking Waves , 1996 .

[11]  M. Reeve Large cod‐end reservoirs as an aid to the live collection of delicate zooplankton , 1981 .

[12]  G. Thorson REPRODUCTIVE and LARVAL ECOLOGY OF MARINE BOTTOM INVERTEBRATES , 1950, Biological reviews of the Cambridge Philosophical Society.

[13]  R. Purchon,et al.  The Ecology of the Lough INE Rapids with Special Reference to Water Currents , 1948 .

[14]  J. Kitching,et al.  The ecology of the Lough Ine rapids with special reference to water currents. V: The sedentary fauna of the Laminarian algae in the Lough Ine area , 1948 .

[15]  B. MacKenzie,et al.  Wind-based models for estimating the dissipation rates of turbulent energy in aquatic environments: empirical comparisons , 1993 .

[16]  J. Roughgarden,et al.  Supply side ecology: the role of physical transport processes , 1987 .

[17]  T. Osborn,et al.  Estimates of the Local Rate of Vertical Diffusion from Dissipation Measurements , 1980 .

[18]  R. W. Crippen,et al.  The use of neutral red and Evans blue for live-dead determinations of marine plankton (with comments on the use of rotenone for inhibition of grazing). , 1974, Stain technology.