Aggravation of nitrous oxide emissions driven by burrowing crab activities in intertidal marsh soils: Mechanisms and environmental implications

نویسندگان

چکیده

Coastal wetlands are hotspots for nitrogen (N) cycling and a significant natural source of the potent greenhouse gas nitrous oxide (N2O). Burrowing benthos known to transform N in intertidal marsh soils, but their contribution N2O emissions underlying molecular mechanisms remain unclear. Here, effects crab bioturbation on coastal marshes, where Chiromantes dehaani Helice tridens tientsinensis were dominant species, investigated field indoor experiments. The increased significantly presence crabs, being positively correlated with intensity differing among species. Natural-abundance isotope analyses indicated that greatly promoted hydroxylamine oxidation production; nevertheless, bacterial denitrification (including heterotrophic nitrifier denitrification) remained pathway. Molecular suggested crab-disturbed habitats might be driven by changes microbial communities, especially disproportionate stimulation nitric reductase-carrying microbes over microbes. This study highlights importance considering burrowing activity, density, species when evaluating cycle wetlands.

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ژورنال

عنوان ژورنال: Soil Biology & Biochemistry

سال: 2022

ISSN: ['0038-0717', '1879-3428']

DOI: https://doi.org/10.1016/j.soilbio.2022.108732