Accelerated nitrogen cycling on Mediterranean seagrass leaves at volcanic CO 2 vents.

Autor: Berlinghof J; Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy. johber@uni-bremen.de.; Department of Marine Ecology, University of Bremen, Bremen, Germany. johber@uni-bremen.de.; Genoa Marine Centre, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Genova, Italy. johber@uni-bremen.de., Montilla LM; Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy., Peiffer F; Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy.; Department of Marine Ecology, University of Bremen, Bremen, Germany., Quero GM; Institute for Marine Biological Resources and Biotechnology, National Research Council (CNR), Ancona, Italy., Marzocchi U; Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy.; Center for water technology (WATEC), Department of Biology, Aarhus University, Aarhus, Denmark., Meador TB; Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic.; Department of Ecosystem Biology, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic., Margiotta F; Department of Research Infrastructures for marine biological resources, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy., Abagnale M; Department of Research Infrastructures for marine biological resources, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy., Wild C; Department of Marine Ecology, University of Bremen, Bremen, Germany., Cardini U; Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Naples, Italy. ulisse.cardini@szn.it.; Genoa Marine Centre, Stazione Zoologica Anton Dohrn - National Institute of Marine Biology, Ecology and Biotechnology, Genova, Italy. ulisse.cardini@szn.it.
Jazyk: angličtina
Zdroj: Communications biology [Commun Biol] 2024 Mar 19; Vol. 7 (1), pp. 341. Date of Electronic Publication: 2024 Mar 19.
DOI: 10.1038/s42003-024-06011-0
Abstrakt: Seagrass meadows form highly productive and diverse ecosystems in coastal areas worldwide, where they are increasingly exposed to ocean acidification (OA). Efficient nitrogen (N) cycling and uptake are essential to maintain plant productivity, but the effects of OA on N transformations in these systems are poorly understood. Here we show that complete N cycling occurs on leaves of the Mediterranean seagrass Posidonia oceanica at a volcanic CO 2 vent near Ischia Island (Italy), with OA affecting both N gain and loss while the epiphytic microbial community structure remains largely unaffected. Daily leaf-associated N 2 fixation contributes to 35% of the plant's N demand under ambient pH, while it contributes to 45% under OA. Nitrification potential is only detected under OA, and N-loss via N 2 production increases, although the balance remains decisively in favor of enhanced N gain. Our work highlights the role of the N-cycling microbiome in seagrass adaptation to OA, with key N transformations accelerating towards increased N gain.
(© 2024. The Author(s).)
Databáze: MEDLINE
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