Dual Consequences of Reclamation

Enhanced Ammonia Oxidation and Carbon Sink Dynamics Versus Escalated Nitrous Oxide Production in Estuarine Wetlands

Bibliographic Data

ID21648961
AuthorsZiHao Wang (0000-0001-6953-0470, Frontiers Science Center for Deep Ocean Multispheres and Earth System & Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering Ocean University of China Qingdao China), Rixuan Gao (0000-0003-0035-7651, Department of Ocean Science The Hong Kong University of Science and Technology Hong Kong China), Chenqingfeng Gao (Frontiers Science Center for Deep Ocean Multispheres and Earth System & Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering Ocean University of China Qingdao China), Yanshu Wang (Frontiers Science Center for Deep Ocean Multispheres and Earth System & Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering Ocean University of China Qingdao China), Jing Li (0000-0001-7792-4322, Frontiers Science Center for Deep Ocean Multispheres and Earth System & Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering Ocean University of China Qingdao China), Qingyan Wang (0000-0003-4201-1843, Frontiers Science Center for Deep Ocean Multispheres and Earth System & Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering Ocean University of China Qingdao China), Dongfan Tian (Frontiers Science Center for Deep Ocean Multispheres and Earth System & Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering Ocean University of China Qingdao China), Xinru Zeng (Key Laboratory of Mariculture, Ministry of Education Ocean University of China Qingdao China), Nian Wu (0009-0009-3475-5085, Frontiers Science Center for Deep Ocean Multispheres and Earth System & Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering Ocean University of China Qingdao China), Feifei Yan (0009-0006-3229-499X, Frontiers Science Center for Deep Ocean Multispheres and Earth System & Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering Ocean University of China Qingdao China), Dongyao Sun (0000-0003-2023-8799, School of Geography Science and Geomatics Engineering Suzhou University of Science and Technology Suzhou China), Wei Du (0000-0001-5941-2382, Yunnan Provincial Key Laboratory of Soil Carbon Sequestration and Pollution Control, Faculty of Environmental Science & Engineering Kunming University of Science & Technology Kunming China), Weifang Hu (0000-0003-0542-9685, Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture and Rural Affairs, Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation Guangzhou Guangdong China), Xianbiao Lin (0000-0003-4549-158X, Frontiers Science Center for Deep Ocean Multispheres and Earth System & Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, and College of Chemistry and Chemical Engineering Ocean University of China Qingdao China, corresponding author)
Year2026
Volume37
Issue4
Pages1368-1380
Publication date2026-02-28
Open AccessYes
TypeARTICLE
VenueLand Degradation and Development (JOURNAL)
Journal identifiersISSN: 1085-3278 • E-ISSN: 1099-145X
PublisherWiley (PUBLISHER • GB)
DOI10.1002/ldr.70178
OpenAlexW4414085925
LanguageEN
Citations received2
References cited69

Reclamation activities have dramatically altered the biogeochemical cycling of nitrogen (N) and carbon (C) in estuarine and coastal wetlands. However, how reclamation affects sediment ammonia oxidation processes mediated by ammonia‐oxidizing archaea (AOA) and bacteria (AOB), and associated nitrous oxide (N 2 O) production remains unclear. Here, different potential ammonia oxidation rates (PAR), N 2 O production rates, associated functional gene abundances, and driving factors were examined in surface sediment (0–5 cm) from estuarine wetlands (reed) and adjacent agricultural lands (aquaculture pond, paddy field, and vegetable field) on Chongming Island, China. We found that land‐use changes from reed marshes to paddy and vegetable fields significantly promoted PAR by 58% and PAR AOA by 119% ( p AOB was not significantly affected. Although reclamation activities suppressed the abundances of ammonia oxidizers, the N 2 O production rates were significantly promoted ( p 2 O production rates ( p 3 t CO 2 year −1 ) could potentially act as a significant contributor to the C sink in estuarine and coastal wetlands. However, reclamation activities also resulted in a marked increase in N 2 O production by 363%, which should be carefully considered when estimating global greenhouse gas emissions

Biogeochemical cycle · Estuary · Land reclamation · Nitrification · Nitrogen Cycle · Nitrous oxide · Sediment · Wetland · Coastal wetland ecosystem dynamics · Marine and coastal ecosystems · Microbial Community Ecology and Physiology

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