Planktonic Subsidies to Surf-Zone and Intertidal Communities
Morgan, Steven G.
Shanks, Alan L.
MacMahan, Jamie H.
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Plankton are transported onshore, providing subsidies of food and new recruits to surf-zone and intertidal communities. The transport of plankton to the surf zone is influenced by wind, wave, and tidal forcing, and whether they enter the surf zone depends on alongshore variation in surf-zone hydrodynamics caused by the interaction of breaking waves with coastal morphology. Areas with gently sloping shores and wide surf zones typically have orders-of-magnitude-higher concentrations of plankton in the surf zone and dense larval settlement in intertidal communities because of the presence of bathymetric rip currents, which are absent in areas with steep shores and narrow surf zones. These striking differences in subsidies have profound consequences; areas with greater subsidies support more productive surf-zone communities and possibly more productive rocky intertidal communities. Recognition of the importance of spatial subsidies for rocky community dynamics has recently advanced ecological theory, and incorporating surf-zone hydrodynamics would be an especially fruitful line of investigation.
The article of record as published may be found at https://doi.org/10.1146/annurev-marine-010816-060514
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Persistent Differences in Horizontal Gradients in Phytoplankton Concentration Maintained by Surf Zone Hydrodynamics Shanks, Alan L.; Morgan, Steven G.; MacMahan, Jamie; Reniers, Ad J.H.M.; Jarvis, Marley; Brown, Jenna; Fujimura, Atsushi; Ziccarelli, Lisa; Griesemer, Chris (SpringerLink, 2017-06-21);Surf zones, regions of breaking waves, are at the interface between the shore and coastal ocean. Surf zone hydrodynamics may affect delivery of phytoplankton subsidies to the intertidal zone. Over a month of daily ...
Morgan, Steven G.; Shanks, Alan L.; MacMahan, Jamie; Reniers, Ad J.H.M.; Griesemer, Chris D.; Jarvis, Marley; Fujimura, Atsushi G. (ASLO Association for the Sciences of Limnology and Oceanography, 2017-05-09);Surf zone hydrodynamics vary along shorelines potentially affecting the delivery of larvae and zooplankton subsidies to intertidal communities, and, hence, the intensity of postsettlement interactions, growth and reproduction ...
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