Leachate effects of pelagic Sargassum spp. on larval swimming behavior of the coral Acropora palmata
| Autor: | Neidy P. Cetz-Navarro, Yann Hénaut, Ana I. Cerón-Flores, Francisco Antonio-Martínez, Alejandro Vega-Zepeda, Julio Espinoza-Avalos, Rodolfo Raigoza-Figueras |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Behavioural ecology Coral lcsh:Medicine Zoology 010501 environmental sciences 01 natural sciences Article Acropora Animals Leachate lcsh:Science Reef Swimming 0105 earth and related environmental sciences Larva geography Multidisciplinary geography.geographical_feature_category biology Conservation biology 010604 marine biology & hydrobiology Reproduction lcsh:R fungi Sargassum Pelagic zone biology.organism_classification Anthozoa lcsh:Q Water quality human activities |
| Zdroj: | Scientific Reports Scientific Reports, Vol 10, Iss 1, Pp 1-13 (2020) |
| ISSN: | 2045-2322 |
| Popis: | An emerging disturbance for Caribbean reefs is the massive arrival of pelagic Sargassum, which deteriorates water quality due to the production of leachates. The highest arrivals of Sargassum took place when broadcasting corals spawned. We experimentally determined the effect of Sargassum leachates on swimming behavior of Acropora palmata larvae through five treatments (control, stain (simulating 100% leachate color), and 25%, 50% and 100% Sargassum leachate concentrations) during 30 min (10 min of videos and 20 min of post-observations). In the videos, larvae with leachates reduced swimming speed, were positively geotactic, the percentage of individuals that swam in a spiral pattern increased, and most behavioral displacements occurred at lower frequencies than larvae without leachates. Moreover, symptomatic spiral behavior was higher in the presence of leachates, suggesting that this behavior may be an effect of pollution. During post-observations, most larvae with leachates were motionless. This is the first time that Sargassum leachates have been documented modifying larval swimming behavior, which may reduce larval dispersion and genetic diversity. We suggest that a future evaluation of the effects of leachates at lower concentrations and over longer periods of exposure is needed. The resilience of corals may be compromised if Sargassum arrivals become frequent events. |
| Databáze: | OpenAIRE |
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