A cross-genus comparison of grazing pressure by two native marine herbivores on native, non-native naturalized, and non-native invasive Sargassum macroalgae
| Autor: | Jill Harris, Nikolas J. Kaplanis, Jennifer E. Smith |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
010607 zoology Intertidal zone Aquatic Science Oceanography 01 natural sciences Grazing pressure California lcsh:Oceanography Macroalgae Abundance (ecology) lcsh:QH540-549.5 Grazing lcsh:GC1-1581 Sargassum muticum Herbivore biology Ecology 010604 marine biology & hydrobiology Invasive algae Sargassum biology.organism_classification Sargassum horneri lcsh:Ecology Grazing assay |
| Zdroj: | Helgoland Marine Research, Vol 74, Iss 1, Pp 1-8 (2020) |
| ISSN: | 1438-3888 |
| Popis: | In marine systems, algal abundance and community composition is often heavily influenced by top-down control by herbivores. As a result, examining the extent to which native herbivores exert grazing pressure on non-native marine algae can provide valuable insight into mechanisms controlling invasion success. The purpose of this study was to examine the grazing preferences of two common intertidal and subtidal herbivores on three congeneric species of marine algae with unique colonization histories in San Diego, California, USA, to determine if grazing pressure, or lack thereof, may help explain invasion success. We provide evidence that neither nativeSargassum agardhianum,nor non-nativeSargassum horneri,are particularly palatable to purple urchins or black turban snails, but that non-nativeSargassum muticumis consumed by both native herbivores. We also provide evidence that when given a choice of all three species neither herbivore exhibits a significant grazing preference for any algal species. We suggest that other mechanisms may determine the invasion success of the two non-native algal species and the overall distribution and abundance patterns of these species, and we discuss potential directions for future work. |
| Databáze: | OpenAIRE |
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