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Coastal inundation regime moderates the short-term effects of sediment and soil additions on seawater oxygen and greenhouse gas dynamics: a microcosm experiment
Journal article   Open access   Peer reviewed

Coastal inundation regime moderates the short-term effects of sediment and soil additions on seawater oxygen and greenhouse gas dynamics: a microcosm experiment

Peter Regier, Nicholas Ward, Alex Izquierdo, Andrew Baldwin, Donnie Day, Julia McElhinny, Kaizad Patel, Rodrigo Vargas, Jianqiu Zheng, Exchange Consortium, …
Frontiers in Marine Science, v 10
11 Dec 2023
DOI: https://doi.org/10.3389/fmars.2023.1308590
Featured in Collection :   UN Sustainable Development Goals @ Drexel
url
https://doi.org/10.3389/fmars.2023.1308590View
Published, Version of Record (VoR) Open

Abstract

Biogeochemistry Carbon Carbon dioxide Chemical analysis Chemical properties Chemicophysical properties Climate change Coastal ecosystems Coastal waters Consortia Dissolved oxygen Forests Gases Global warming Greenhouse effect Greenhouse gases Interfaces Laboratory experimentation Locations (working) Nitrous oxide Oxygen Oxygen consumption Persistence Salinity Seawater Sediment Sediments Sensors Soil Soil erosion Soils Surface water Terrestrial environments Tidewater Water analysis Wetlands
The frequency and persistence of tidal inundation varies along the coastal terrestrial-aquatic interface, from frequently inundated wetlands to rarely inundated upland forests. This inundation gradient controls soil and sediment biogeochemistry and influence the exchange of soils and sediments from terrestrial to aquatic domains. Although a rich literature exist on studies of the influence of tidal waters on the biogeochemistry of coastal ecosystem soils, few studies have experimentally addressed the reverse question: How do soils (or sediments) from different coastal ecosystems influence the biogeochemistry of the tidal waters that inundate them? To better understand initial responses of coastal waters that flood coastal wetlands and uplands, we conducted short-term laboratory experiments where seawater was amended with sediments and soils collected across regional gradients of inundation exposure (i.e., frequently to rarely inundated) for 14 sites across the Mid-Atlantic, USA. Measured changes in dissolved oxygen and greenhouse gas concentrations were used to calculate gas consumption or production rates occurring during seawater exposure to terrestrial materials. We also measured soil and water physical and chemical properties to explore potential drivers. We observed higher oxygen consumption rates for seawater incubated with soils/sediments from frequently inundated locations and higher carbon dioxide production for seawater incubated with soils from rarely inundated transect locations. Incubations with soil from rarely inundated sites produced the highest global warming potential, primarily driven by carbon dioxide and secondarily by nitrous oxide. We also found environmental drivers of gas rates varied notably between transect locations. Our findings indicate that seawater responses to soil and sediment inputs across coastal terrestrial-aquatic interfaces exhibit some consistent patterns and high intra-and inter-site variability, suggesting potential biogeochemical feedback loops as inundation regimes shift inland.

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8 Record Views
2 citations in Web of Science
2 citations in Scopus

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UN Sustainable Development Goals (SDGs)

This publication has contributed to the advancement of the following goals:

#15 Life on Land
#14 Life Below Water
#13 Climate Action

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Collaboration types
Domestic collaboration
Web of Science research areas
Environmental Sciences
Marine & Freshwater Biology
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