Agricultural Land Use Impacts Aquatic Greenhouse Gas Emissions From Wetlands in the Canadian Prairie Pothole Region

IF 5.4 2区 地球科学 Q1 ENVIRONMENTAL SCIENCES Global Biogeochemical Cycles Pub Date : 2025-03-15 DOI:10.1029/2024GB008209
L. A. Logozzo, C. Soued, L. E. Bortolotti, P. Badiou, P. Kowal, B. Page, M. J. Bogard
{"title":"Agricultural Land Use Impacts Aquatic Greenhouse Gas Emissions From Wetlands in the Canadian Prairie Pothole Region","authors":"L. A. Logozzo,&nbsp;C. Soued,&nbsp;L. E. Bortolotti,&nbsp;P. Badiou,&nbsp;P. Kowal,&nbsp;B. Page,&nbsp;M. J. Bogard","doi":"10.1029/2024GB008209","DOIUrl":null,"url":null,"abstract":"<p>The Prairie Pothole Region (PPR) is the largest wetland complex in North America, with millions of wetlands punctuating the landscapes of Canada and the United States. Here, wetlands have been dramatically impacted by agricultural land use, with unclear implications for regional to global greenhouse gas (GHG) emissions budgets. By surveying wetlands across all three Canadian prairie provinces in the PPR, we show that emissions patterns of carbon dioxide (CO<sub>2</sub>), methane (CH<sub>4</sub>), and nitrous oxide (N<sub>2</sub>O) from aquatic habitats differ among wetlands embedded in cropland versus perennial landcover. Wetlands in cropped landscapes had double the aquatic diffusive emissions (20.6 ± 31.5 vs. 9.4 ± 17.3 g CO<sub>2</sub>-<i>eq</i> m<sup>−2</sup> d<sup>−1</sup>) largely driven by CH<sub>4</sub>. Structural equation modeling showed that all three GHGs responded differently to the surrounding landscape properties. Emissions of CH<sub>4</sub> were the most sensitive to land use, responding positively to the elevated phosphorus content and lower sulfate content in cropped settings, despite higher organic matter content in wetlands in perennial landscapes. Aquatic N<sub>2</sub>O emissions were negligible, while CO<sub>2</sub> emissions were high, but not strongly related to agricultural land use. While our estimates of aquatic CH<sub>4</sub> emissions from PPR wetlands were high (18.2 ± 41.4 mmol CH<sub>4</sub> m<sup>−2</sup> d<sup>−1</sup>), accounting for fluxes from vegetated and soil habitats would lead to whole-wetland emissions rates that are lower and comparable to wetlands in other biomes. Our study represents an important step toward understanding wetland emission responses to land use in the PPR and other wetland-rich agricultural landscapes.</p>","PeriodicalId":12729,"journal":{"name":"Global Biogeochemical Cycles","volume":"39 3","pages":""},"PeriodicalIF":5.4000,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024GB008209","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Global Biogeochemical Cycles","FirstCategoryId":"89","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1029/2024GB008209","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

The Prairie Pothole Region (PPR) is the largest wetland complex in North America, with millions of wetlands punctuating the landscapes of Canada and the United States. Here, wetlands have been dramatically impacted by agricultural land use, with unclear implications for regional to global greenhouse gas (GHG) emissions budgets. By surveying wetlands across all three Canadian prairie provinces in the PPR, we show that emissions patterns of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) from aquatic habitats differ among wetlands embedded in cropland versus perennial landcover. Wetlands in cropped landscapes had double the aquatic diffusive emissions (20.6 ± 31.5 vs. 9.4 ± 17.3 g CO2-eq m−2 d−1) largely driven by CH4. Structural equation modeling showed that all three GHGs responded differently to the surrounding landscape properties. Emissions of CH4 were the most sensitive to land use, responding positively to the elevated phosphorus content and lower sulfate content in cropped settings, despite higher organic matter content in wetlands in perennial landscapes. Aquatic N2O emissions were negligible, while CO2 emissions were high, but not strongly related to agricultural land use. While our estimates of aquatic CH4 emissions from PPR wetlands were high (18.2 ± 41.4 mmol CH4 m−2 d−1), accounting for fluxes from vegetated and soil habitats would lead to whole-wetland emissions rates that are lower and comparable to wetlands in other biomes. Our study represents an important step toward understanding wetland emission responses to land use in the PPR and other wetland-rich agricultural landscapes.

Abstract Image

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
草原洼地地区(PPR)是北美最大的湿地群,数以百万计的湿地点缀着加拿大和美国的地貌。在这里,湿地受到农业用地的严重影响,对地区乃至全球温室气体(GHG)排放预算的影响尚不明确。通过调查加拿大草原三省的湿地,我们发现水生栖息地二氧化碳(CO2)、甲烷(CH4)和氧化亚氮(N2O)的排放模式在耕地湿地与多年生土地覆盖湿地之间存在差异。耕地中的湿地的水生扩散排放量(20.6 ± 31.5 vs. 9.4 ± 17.3 g CO2-eq m-2 d-1)比常年覆盖的湿地高一倍,这主要是由 CH4 驱动的。结构方程模型显示,这三种温室气体对周围景观特性的反应不同。CH4 的排放对土地利用最为敏感,尽管多年生景观中湿地的有机物含量较高,但它对种植环境中磷含量的升高和硫酸盐含量的降低有积极的响应。水生一氧化二氮的排放量可以忽略不计,而二氧化碳的排放量较高,但与农业土地利用的关系不大。虽然我们对PPR湿地的水生CH4排放量估计较高(18.2 ± 41.4 mmol CH4 m-2 d-1),但考虑到植被和土壤栖息地的通量,整个湿地的排放量会更低,与其他生物群落的湿地相当。我们的研究为了解湿地排放对巴布亚新几内亚和其他湿地丰富的农业景观中土地利用的响应迈出了重要一步。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Global Biogeochemical Cycles
Global Biogeochemical Cycles 环境科学-地球科学综合
CiteScore
8.90
自引率
7.70%
发文量
141
审稿时长
8-16 weeks
期刊介绍: Global Biogeochemical Cycles (GBC) features research on regional to global biogeochemical interactions, as well as more local studies that demonstrate fundamental implications for biogeochemical processing at regional or global scales. Published papers draw on a wide array of methods and knowledge and extend in time from the deep geologic past to recent historical and potential future interactions. This broad scope includes studies that elucidate human activities as interactive components of biogeochemical cycles and physical Earth Systems including climate. Authors are required to make their work accessible to a broad interdisciplinary range of scientists.
期刊最新文献
Agricultural Land Use Impacts Aquatic Greenhouse Gas Emissions From Wetlands in the Canadian Prairie Pothole Region Contributions of Vertically Migrating Metazoans to Sinking and Suspended Particulate Matter Fuel N2 Production in the Eastern Tropical North Pacific Oxygen Deficient Zone Temperature and Water Levels Collectively Regulate Methane Emissions From Subtropical Freshwater Wetlands Divergent Responses of CH4 Emissions and Uptake to Global Change Drivers Issue Information
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1