Methane fluxes in tidal marshes of the conterminous United States,Global Change Biology

当前位置： X-MOL 学术 › Glob. Change Biol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Methane fluxes in tidal marshes of the conterminous United States
Global Change Biology ( IF 10.8 ) Pub Date : 2024-09-05 , DOI: 10.1111/gcb.17462
Ariane Arias-Ortiz _{1,

2} , Jaxine Wolfe ₃ , Scott D Bridgham ₄ , Sara Knox _{5,

6} , Gavin McNicol ₇ , Brian A Needelman ₈ , Julie Shahan ₉ , Ellen J Stuart-Haëntjens ₁₀ , Lisamarie Windham-Myers ₁₀ , Patty Y Oikawa ₁₁ , Dennis D Baldocchi ₂ , Joshua S Caplan ₁₂ , Margaret Capooci ₁₃ , Kenneth M Czapla ₁₄ , R Kyle Derby ₁₅ , Heida L Diefenderfer ₁₆ , Inke Forbrich _{17,

18} , Gina Groseclose ₁₉ , Jason K Keller _{20,

21} , Cheryl Kelley ₂₂ , Amr E Keshta _{8,

23} , Helena S Kleiner ₃ , Ken W Krauss ₂₄ , Robert R Lane ₂₅ , Sarah Mack ₂₆ , Serena Moseman-Valtierra ₂₇ , Thomas J Mozdzer ₂₈ , Peter Mueller ₂₉ , Scott C Neubauer ₃₀ , Genevieve Noyce ₃ , Karina V R Schäfer ₃₁ , Rebecca Sanders-DeMott ₃₂ , Charles A Schutte ₃₃ , Rodrigo Vargas ₁₃ , Nathaniel B Weston ₃₄ , Benjamin Wilson ₃₅ , J Patrick Megonigal ₃ , James R Holmquist ₃

Affiliation

Physics Department, Universitat Autònoma de Barcelona, Barcelona, Spain.
Ecosystem Science Division, Department of Environmental Science, Policy and Management, University of California, Berkeley, California, USA.
Smithsonian Environmental Research Center, Edgewater, Maryland, USA.
Institute of Ecology and Evolution, University of Oregon, Eugene, Oregon, USA.
Department of Geography, The University of British Columbia, Vancouver, British Columbia, Canada.
Department of Geography, McGill University, Montreal, Quebec, Canada.
Department of Earth and Environmental Sciences, University of Illinois Chicago, Chicago, Illinois, USA.
Department of Environmental Science and Technology, University of Maryland, College Park, Maryland, USA.
Earth System Science, Stanford University, Stanford, California, USA.
U.S. Geological Survey, Water Resources Mission Area, Menlo Park, California, USA.
Department of Earth and Environmental Sciences, California State University, East Bay, Hayward, California, USA.
Department of Architecture & Environmental Design, Temple University, Ambler, Pennsylvania, USA.
Department of Plant & Soil Sciences, University of Delaware, Newark, Delaware, USA.
Department of Environmental Sciences, University of California Riverside, Riverside, California, USA.
Maryland Department of Natural Resources, Chesapeake Bay National Estuarine Research Reserve, Annapolis, Maryland, USA.
Coastal Sciences Division, Pacific Northwest National Laboratory, Sequim, Washington, USA.
Ecosystems Center, Marine Biological Laboratory, Woods Hole, Massachusetts, USA.
Department of Environmental Sciences, University of Toledo, Toledo, Ohio, USA.
Department of Oceanography and Coastal Sciences, Louisiana State University, Baton Rouge, Louisiana, USA.
Schmid College of Science and Technology, Chapman University, Orange, California, USA.
Kravis Department of Integrated Sciences, Claremont McKenna College, Claremont, California, USA.
Department of Geological Sciences, University of Missouri, Columbia, Missouri, USA.
Botany Department, Faculty of Science, Tanta University, Tanta, Egypt.
U.S. Geological Survey, Wetland and Aquatic Research Center, Lafayette, Louisiana, USA.
Comite Resources, Baton Rouge, Louisiana, USA.
Tierra Resources LLC, Lafitte, Louisiana, USA.
Department of Biological Sciences, University of Rhode Island, Kingston, Rhode Island, USA.
Bryn Mawr College, Department of Biology, Bryn Mawr, Pennsylvania, USA.
Institute of Landscape Ecology, University of Münster, Münster, Germany.
Department of Biology, Virginia Commonwealth University, Richmond, Virginia, USA.
Earth and Environmental Science Dept, Rutgers University Newark, Newark, New Jersey, USA.
U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, Massachusetts, USA.
Department of Environmental Science, Rowan University, Glassboro, New Jersey, USA.
Department of Geography and the Environment, Villanova University, Villanova, Pennsylvania, USA.
Department of Biological Sciences, Florida International University, Miami, Florida, USA.

Methane (CH4) is a potent greenhouse gas (GHG) with atmospheric concentrations that have nearly tripled since pre‐industrial times. Wetlands account for a large share of global CH4 emissions, yet the magnitude and factors controlling CH4 fluxes in tidal wetlands remain uncertain. We synthesized CH4 flux data from 100 chamber and 9 eddy covariance (EC) sites across tidal marshes in the conterminous United States to assess controlling factors and improve predictions of CH4 emissions. This effort included creating an open‐source database of chamber‐based GHG fluxes (https://doi.org/10.25573/serc.14227085). Annual fluxes across chamber and EC sites averaged 26 ± 53 g CH4 m−2 year−1, with a median of 3.9 g CH4 m−2 year−1, and only 25% of sites exceeding 18 g CH4 m−2 year−1. The highest fluxes were observed at fresh‐oligohaline sites with daily maximum temperature normals (MATmax) above 25.6°C. These were followed by frequently inundated low and mid‐fresh‐oligohaline marshes with MATmax ≤25.6°C, and mesohaline sites with MATmax >19°C. Quantile regressions of paired chamber CH4 flux and porewater biogeochemistry revealed that the 90th percentile of fluxes fell below 5 ± 3 nmol m−2 s−1 at sulfate concentrations >4.7 ± 0.6 mM, porewater salinity >21 ± 2 psu, or surface water salinity >15 ± 3 psu. Across sites, salinity was the dominant predictor of annual CH4 fluxes, while within sites, temperature, gross primary productivity (GPP), and tidal height controlled variability at diel and seasonal scales. At the diel scale, GPP preceded temperature in importance for predicting CH4 flux changes, while the opposite was observed at the seasonal scale. Water levels influenced the timing and pathway of diel CH4 fluxes, with pulsed releases of stored CH4 at low to rising tide. This study provides data and methods to improve tidal marsh CH4 emission estimates, support blue carbon assessments, and refine national and global GHG inventories.

中文翻译：

美国本土潮汐沼泽中的甲烷通量

甲烷 (CH4) 是一种强效温室气体 (GHG)，其大气浓度自工业化前时期以来几乎增加了两倍。湿地占全球甲烷排放量的很大一部分，但潮汐湿地甲烷通量的大小和控制因素仍不确定。我们综合了美国本土潮汐沼泽中 100 个室和 9 个涡流协方差 (EC) 站点的 CH4 通量数据，以评估控制因素并改进对 CH4 排放的预测。这项工作包括创建一个基于室的温室气体通量的开源数据库 (https://doi.org/10.25573/serc.14227085)。穿过暗室和 EC 站点的年通量平均为 26 ± 53 g CH4 m−2year−1，中位数为 3.9 g CH4 m−2year−1，只有 25% 的站点超过 18g CH4 m−2year−1 。在每日最高正常温度 (MATmax) 高于 25.6°C 的新鲜寡盐地点观察到最高通量。其次是经常被淹没的低盐和中盐沼泽，MATmax ≤25.6°C，以及中盐沼泽，MATmax >19°C。配对室 CH4 通量和孔隙水生物地球化学的分位数回归表明，在硫酸盐浓度 >4.7 ± 0.6 mM、孔隙水盐度 >21 ± 2 psu 或地表条件下，通量的第 90 个百分位数降至 5 ± 3 nmol m−2 s−1 以下水盐度 >15 ± 3 psu。在不同地点，盐度是年度 CH4 通量的主要预测因素，而在地点内，温度、总初级生产力 (GPP) 和潮汐高度控制着昼夜和季节尺度的变化。在昼夜尺度上，GPP 在预测 CH4 通量变化方面的重要性高于温度，而在季节尺度上则相反。水位影响了昼间 CH4 通量的时间和路径，在退潮到涨潮时储存的 CH4 呈脉冲式释放。这项研究提供了数据和方法来改进潮汐沼泽甲烷排放估算、支持蓝碳评估以及完善国家和全球温室气体清单。

更新日期：2024-09-05

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南