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[Article Dataset] A tale of two stressors: nitrogen, microplastics, and their influence on estuarine organic matter degradation
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This dataset supports a study examining how microplastics and excess nitrogen interact to affect organic matter breakdown in estuarine sediments, using a 10-day field experiment across varied seafloor community types. The research matters because estuaries are critical carbon-cycling zones and understanding how combined pollution stressors alter that cycling helps predict broader ecosystem consequences.
This dataset accompanies the submitted manuscript titled “A tale of two stressors: nitrogen, microplastics, and their influence on estuarine organic matter degradation.” It comprises abiotic and biotic environmental predictors collected during a 10-day in situ manipulation experiment, alongside measurements of organic matter degradation rates.Rapid organic matter degradation assays with added microplastics, nitrogen, and a combined microplastics–nitrogen treatment were deployed for 10 days across a gradient of contrasting infaunal community traits. The experimental gradient was characterised by a progression in infaunal community composition, ranging from dominance by head-down deposit-feeding polychaetes, through mixed assemblages, to dominance by deep-dwelling facultative deposit-feeding bivalves.Environmental predictors measured include loss on ignition (LOI), mean grain size, chlorophyll a (chl a), and apparent redox potential discontinuity (aRPD). Sediment surface features were used to estimate Macomona bivalve density and maldanid polychaete density. For full experimental design details, sampling protocols, and analytical methods, please refer to the associated manuscript
More Papers Like This
[Article Dataset] A tale of two stressors: nitrogen, microplastics, and their influence on estuarine organic matter degradation
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This dataset accompanies an in-situ experiment examining how added microplastics and nitrogen — either alone or combined — affect the rate at which organic matter breaks down in estuarine sediments, across communities of different burrowing invertebrates. The data enables analysis of how two of the most widespread human-caused stressors interact at the base of coastal food webs, where organic matter recycling underpins the productivity of estuaries.
A tale of two stressors: Nitrogen, microplastics, and their influence on estuarine organic matter degradation
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Researchers tested how microplastics and nitrogen addition — individually and together — alter organic matter degradation in estuarine sediments hosting different invertebrate communities, finding that single-stressor effects on key environmental drivers were decoupled when both stressors were applied together, indicating that standard single-stressor models underestimate the complexity of real-world estuarine carbon cycling under combined anthropogenic pressures.
[Article Dataset] Combined effects of microplastics and nitrogen on bivalve-mediated biogeochemical cycling.
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This dataset accompanies a study on how microplastics and excess nitrogen together affect biogeochemical processes mediated by the bivalve Macomona liliana. The mesocosm experiment measured nutrient fluxes, sediment properties, fatty acid profiles, and microbial indicators under control, microplastic, nitrogen, and combined-stressor conditions. The data provide resources for understanding how multiple environmental stressors interact to disrupt coastal sediment ecosystem functions.
Impacts of microplastics and nitrogen on invertebrate-mediated biogeochemical cycling in estuarine ecosystems
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Researchers used estuarine mesocosms and field assays to show that microplastics and nitrogen enrichment interact in non-additive ways, altering bivalve-driven nutrient fluxes, degrading sediment redox conditions, and decoupling organic matter breakdown from the environmental factors that normally predict it.
[Article Dataset] Combined effects of microplastics and nitrogen on bivalve-mediated biogeochemical cycling.
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This dataset supports research examining the combined effects of microplastics and nitrogen enrichment on bivalve-mediated nutrient cycling in coastal sediments. Researchers collected measurements of ammonium and oxygen fluxes, sediment chemistry, fatty acid composition, and visual indicators from mesocosm experiments with the bivalve Macomona liliana. The dataset enables analysis of how co-occurring stressors alter the ecological functions that bivalves perform in marine sediment environments.
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