Mangrove peat and algae leachates elicit rapid and contrasting molecular and microbial responses in coastal waters
Abstract As sea level rises, previously sequestered blue carbon can be exported offshore as particulate or dissolved organic matter where it may be re-mineralized or sequestered. The priming effect, or interactive effects of organic matter turnover with a mixed substrate, is well described in soils,...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2023-10-01
|
| Series: | Communications Earth & Environment |
| Online Access: | https://doi.org/10.1038/s43247-023-00975-3 |
| _version_ | 1797556252551675904 |
|---|---|
| author | Elise S. Morrison Yina Liu Albert Rivas-Ubach João Henrique Fernandes Amaral Michael Shields Todd Z. Osborne Rosalie Chu Nicholas Ward Thomas S. Bianchi |
| author_facet | Elise S. Morrison Yina Liu Albert Rivas-Ubach João Henrique Fernandes Amaral Michael Shields Todd Z. Osborne Rosalie Chu Nicholas Ward Thomas S. Bianchi |
| author_sort | Elise S. Morrison |
| collection | DOAJ |
| description | Abstract As sea level rises, previously sequestered blue carbon can be exported offshore as particulate or dissolved organic matter where it may be re-mineralized or sequestered. The priming effect, or interactive effects of organic matter turnover with a mixed substrate, is well described in soils, but still debated in aquatic systems. Priming may contribute to enhanced blue carbon re-mineralization in coastal environments. Here we examined mangrove-derived dissolved organic matter turnover in a lab incubation, with leachates from mangrove peat, 13C-labeled algae, and peat+algae (primed). Particulate and dissolved organic matter were assessed; microbial metatranscriptomes were evaluated; and dissolved organic matter was characterized with high resolution mass spectrometry. Stable isotopes indicated rapid allocation of algal-derived dissolved organic matter into particulate organic matter. The algal treatment had the greatest increase in carbon dioxide, but primed and peat treatments had the greatest loss of dissolved organic carbon, greater RNA concentrations, and similar changes in total carbon dioxide. This suggests that, while total carbon dioxide did not increase under priming conditions, the addition of a peat substrate may promote microbial biomass production relative to carbon dioxide production. This work highlights that more targeted studies investigating the specific mechanisms of priming are necessary to address the molecular and microbial transformations associated with priming in aquatic systems. |
| first_indexed | 2024-03-10T16:59:14Z |
| format | Article |
| id | doaj.art-adeb046e8d74476db058b999bed24f8d |
| institution | Directory Open Access Journal |
| issn | 2662-4435 |
| language | English |
| last_indexed | 2024-03-10T16:59:14Z |
| publishDate | 2023-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Earth & Environment |
| spelling | doaj.art-adeb046e8d74476db058b999bed24f8d2023-11-20T11:01:54ZengNature PortfolioCommunications Earth & Environment2662-44352023-10-014111310.1038/s43247-023-00975-3Mangrove peat and algae leachates elicit rapid and contrasting molecular and microbial responses in coastal watersElise S. Morrison0Yina Liu1Albert Rivas-Ubach2João Henrique Fernandes Amaral3Michael Shields4Todd Z. Osborne5Rosalie Chu6Nicholas Ward7Thomas S. Bianchi8University of Florida, Engineering School of Sustainable Infrastructure and the EnvironmentDepartment of Oceanography, Texas A&M UniversityInstitute of Forest Sciences (INIA—CSIC)University of Florida, Engineering School of Sustainable Infrastructure and the EnvironmentGeochemical and Environmental Research Group, Texas A&M UniversityWhitney Laboratory for Marine Bioscience, University of FloridaPacific Northwest National LaboratoryMarine and Coastal Research Laboratory, Pacific Northwest National LaboratoryDepartment of Geological Sciences, University of FloridaAbstract As sea level rises, previously sequestered blue carbon can be exported offshore as particulate or dissolved organic matter where it may be re-mineralized or sequestered. The priming effect, or interactive effects of organic matter turnover with a mixed substrate, is well described in soils, but still debated in aquatic systems. Priming may contribute to enhanced blue carbon re-mineralization in coastal environments. Here we examined mangrove-derived dissolved organic matter turnover in a lab incubation, with leachates from mangrove peat, 13C-labeled algae, and peat+algae (primed). Particulate and dissolved organic matter were assessed; microbial metatranscriptomes were evaluated; and dissolved organic matter was characterized with high resolution mass spectrometry. Stable isotopes indicated rapid allocation of algal-derived dissolved organic matter into particulate organic matter. The algal treatment had the greatest increase in carbon dioxide, but primed and peat treatments had the greatest loss of dissolved organic carbon, greater RNA concentrations, and similar changes in total carbon dioxide. This suggests that, while total carbon dioxide did not increase under priming conditions, the addition of a peat substrate may promote microbial biomass production relative to carbon dioxide production. This work highlights that more targeted studies investigating the specific mechanisms of priming are necessary to address the molecular and microbial transformations associated with priming in aquatic systems.https://doi.org/10.1038/s43247-023-00975-3 |
| spellingShingle | Elise S. Morrison Yina Liu Albert Rivas-Ubach João Henrique Fernandes Amaral Michael Shields Todd Z. Osborne Rosalie Chu Nicholas Ward Thomas S. Bianchi Mangrove peat and algae leachates elicit rapid and contrasting molecular and microbial responses in coastal waters Communications Earth & Environment |
| title | Mangrove peat and algae leachates elicit rapid and contrasting molecular and microbial responses in coastal waters |
| title_full | Mangrove peat and algae leachates elicit rapid and contrasting molecular and microbial responses in coastal waters |
| title_fullStr | Mangrove peat and algae leachates elicit rapid and contrasting molecular and microbial responses in coastal waters |
| title_full_unstemmed | Mangrove peat and algae leachates elicit rapid and contrasting molecular and microbial responses in coastal waters |
| title_short | Mangrove peat and algae leachates elicit rapid and contrasting molecular and microbial responses in coastal waters |
| title_sort | mangrove peat and algae leachates elicit rapid and contrasting molecular and microbial responses in coastal waters |
| url | https://doi.org/10.1038/s43247-023-00975-3 |
| work_keys_str_mv | AT elisesmorrison mangrovepeatandalgaeleachateselicitrapidandcontrastingmolecularandmicrobialresponsesincoastalwaters AT yinaliu mangrovepeatandalgaeleachateselicitrapidandcontrastingmolecularandmicrobialresponsesincoastalwaters AT albertrivasubach mangrovepeatandalgaeleachateselicitrapidandcontrastingmolecularandmicrobialresponsesincoastalwaters AT joaohenriquefernandesamaral mangrovepeatandalgaeleachateselicitrapidandcontrastingmolecularandmicrobialresponsesincoastalwaters AT michaelshields mangrovepeatandalgaeleachateselicitrapidandcontrastingmolecularandmicrobialresponsesincoastalwaters AT toddzosborne mangrovepeatandalgaeleachateselicitrapidandcontrastingmolecularandmicrobialresponsesincoastalwaters AT rosaliechu mangrovepeatandalgaeleachateselicitrapidandcontrastingmolecularandmicrobialresponsesincoastalwaters AT nicholasward mangrovepeatandalgaeleachateselicitrapidandcontrastingmolecularandmicrobialresponsesincoastalwaters AT thomassbianchi mangrovepeatandalgaeleachateselicitrapidandcontrastingmolecularandmicrobialresponsesincoastalwaters |