Antagonistic Effects of Light Pollution and Warming on Habitat-Forming Seaweeds.

Autor: Caley A; Centre for Marine Science and Innovation, Evolution & Ecology Research Centre, School of Biological, Earth and Environmental Science University of New South Wales Sydney New South Wales Australia., Marzinelli EM; School of Life and Environmental Sciences The University of Sydney Sydney New South Wales Australia., Byrne M; School of Life and Environmental Sciences The University of Sydney Sydney New South Wales Australia., Mayer-Pinto M; Centre for Marine Science and Innovation, Evolution & Ecology Research Centre, School of Biological, Earth and Environmental Science University of New South Wales Sydney New South Wales Australia.
Jazyk: angličtina
Zdroj: Ecology and evolution [Ecol Evol] 2024 Oct 16; Vol. 14 (10), pp. e70420. Date of Electronic Publication: 2024 Oct 16 (Print Publication: 2024).
DOI: 10.1002/ece3.70420
Abstrakt: Artificial Light at Night (ALAN) is an emerging global stressor that is likely to interact with other stressors such as warming, affecting habitat-forming species and ecological functions. Seaweeds are dominant habitat-forming species in temperate marine ecosystems, where they support primary productivity and diverse ecological communities. Warming is a major stressor affecting seaweed forests, but effects of ALAN on seaweeds are largely unknown. We manipulated ALAN (0 lx vs. 25 lx at night) and temperature (ambient vs. +1.54°C warming) to test their independent and interactive effects on the survival, growth (biomass, total-, blade- and stipe-length) and function (photosynthesis, primary productivity and respiration) on the juveniles of two habitat-forming seaweeds, the kelp Ecklonia radiata and the fucoid Sargassum sp. Warming significantly increased Ecklonia mortality; however, ALAN did not affect mortality. ALAN had positive effects on Ecklonia biomass, total and blade growth rates and gross primary productivity; however, warming largely counterbalanced these effects. We found no significant effects of warming or ALAN on Ecklonia photosynthetic yield, stipe length, net primary productivity or respiration rates. We found no effects of ALAN or warming on Sargassum for any of the measured variables. Synthesis. Our findings indicate that ALAN can have positive effects on seaweed growth and functioning, but such effects are likely species-specific and can be counterbalanced by warming, suggesting an antagonistic interaction between these global stressors. These findings can help us to predict and manage the effects of these stressors on seaweeds, which underpin coastal biodiversity.
Competing Interests: The authors declare no conflicts of interest.
(© 2024 The Author(s). Ecology and Evolution published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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