Transport of larvae and detritus across the surf zone of a steep reflective pocket beach
| Autor: | Atsushi Fujimura, Ad Reniers, Chris Griesemer, Marley Jarvis, Alan L. Shanks, Jenna Brown, Steven G. Morgan, Jamie MacMahan |
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| Přispěvatelé: | Naval Postgraduate School (U.S.), Oceanography |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Pocket beach
Intertidal zone Aquatic Science Surf zone Streaming Oceanography Rocky shore Water column Reflective beach Cross-shore exchange Holoplankton precompetent larvae streaming competent larvae Cyprids Ecology Evolution Behavior and Systematics Detritus cyprids Ecology fungi Precompetent larvae Marine Biology & Hydrobiology Fishery Competent larvae Habitat detritus reflective beach cross-shore exchange Zoology Geology |
| Zdroj: | Shanks, AL; MacMahan, J; Morgan, SG; Reniers, AJHM; Jarvis, M; Brown, J; et al.(2015). Transport of larvae and detritus across the surf zone of a steep reflective pocket beach. Marine Ecology Progress Series, 528, 71-86. doi: 10.3354/meps11223. UC Davis: Retrieved from: http://www.escholarship.org/uc/item/6ts92978 Marine Ecology Progress Series, 528, 2015 |
| ISSN: | 0171-8630 |
| DOI: | 10.3354/meps11223. |
| Popis: | The article of record as published may be found at http://dx.doi.org/10.3354/meps11223 Larvae of many intertidal species develop offshore and must cross the surf zone to complete their onshore migration to adult habitats. Depending on hydrodynamics, the surf zone may limit this migration, especially on reflective rocky shores. As a logistically tractable analog of a rocky shore environment, we carried out a comprehensive biological and physical study of the hydrodynamics of a steep reflective sandy beach. Holoplankton and precompetent larval invertebrates were much less abundant within the surf zone than offshore, and their concentrations inside and outside the surf zone were not significantly correlated, suggesting that they were not entering the surf zone. Persistent offshore flow throughout the water column at the outer edge of the surf zone may prevent these organisms from entering the surf zone. In contrast, the concentrations of detritus and a competent larval invertebrate (i.e. cyprids), while also not significantly correlated with concentrations offshore, were frequently more concentrated in the surf zone than offshore. Within the surf zone, the concentration of detritus was significantly correlated with concentrations of competent larval invertebrates (barnacles, gastropods, polychaetes, and bopyrid amphipod) and organisms that may be associated with detritus (amphipods and harpacticoid copepods). These concentrations were significantly negatively correlated with average daily wave height. We hypothesize that detritus and larvae enter the surf zone near the bottom during calm wave conditions by a process of near-bottom streaming. Near-bottom streaming is associated with all surf zones and may be a general mechanism for onshore transport of larvae close to the coast. National Science Foundation Grant NSD-OCE#092735 |
| Databáze: | OpenAIRE |
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