Abstract
Vegetated habitats play a key role in the structure and function of ecosystems by modifying local environmental conditions and providing food and habitat to a great range of organisms. The aim of this study is to assess the relative importance of two widely distributed macroalgae species in providing ecosystem functions in coastal areas where they are prevalent (Patagonia, Argentina, Lat 43.73°, Lon 64.92°) in comparison to low-vegetated areas without these two species. In October 2018 and May 2019, we tested whether Ulva spp. and Undaria pinnatifida perform a series of ecosystem functions commonly associated with vegetated coastal environments. Our study suggests that Ulva spp. decreases water current and provides habitat for epifauna, as the adjacent low-vegetated areas without Ulva spp. present higher gypsum block dissolution rates, lower biomass and richness of total epifauna, and lower grazer biomass than areas dominated by Ulva spp. U. pinnatifida, on the other hand, only showed a positive effect on epifauna biomass relative to low-vegetated areas, and no effect on the rest of the variables measured, despite providing similar levels of coverage to Ulva spp., and having a larger and more complex structure. None of the two macroalgae influence the habitat use by fishes. Despite smaller size and a labile structure, Ulva spp. presence had an effect on more variables than U. pinnatifida, and the function provided by U. pinnatifida was also provided by Ulva spp., namely U. pinnatifida did not provide new functions to the system.
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Data availability
The datasets generated during the current study are not publicly available but are available from the corresponding author on reasonable request.
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Acknowledgements
We thank Lucila Amione, Andrea Arcángel, Miguel Camarero, Raul González, Macarena Marello and Mariel Ojeda who kindly assisted in the field and laboratory. This study funded by a post-doctoral fellowship awarded to PdlB by CONICET and Maimonides University and was supported by grants from the Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina [PIP CONICET 112-201501-00465CO]; and the Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT), Argentina [PICT-2018-03107] to MN.
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This study funded by a post-doctoral fellowship awarded to PdlB by CONICET and Maimonides University and was supported by grants from the Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina [PIP CONICET 112-201501-00465CO]; and the Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT), Argentina [PICT-2018-03107] to MN. The authors declare that no funds, grants, or other support were received during the preparation of this manuscript. The authors have no relevant financial or non-financial interests to disclose.
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All authors contributed to the study conception and design. Material preparation and data collection were performed by Paula de la Barra, Patricio J. Pereyra, Marianela Gastaldi, Juan F. Saad, Emiliano A. Rodríguez and Maite A. Narvarte. Data analysis and first draft of the manuscript was written by Paula de la Barra. All authors commented on previous versions of the manuscript and approved the final version.
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de la Barra, P., Pereyra, P.J., Gastaldi, M. et al. Intertidal populations of Ulva spp. and Undaria pinnatifida are good habitat providers for invertebrates but not for fish. Mar Biol 170, 91 (2023). https://doi.org/10.1007/s00227-023-04238-9
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DOI: https://doi.org/10.1007/s00227-023-04238-9