混合土地利用、恢复草原流域脉冲分流碳出口的证据

IF 1.7 4区 环境科学与生态学 Q3 ECOLOGY
Freshwater Science Pub Date : 2022-03-07 DOI:10.1086/719755
David Manning, A. Dere, Andrew Miller, Tracy J. Coleman
{"title":"混合土地利用、恢复草原流域脉冲分流碳出口的证据","authors":"David Manning, A. Dere, Andrew Miller, Tracy J. Coleman","doi":"10.1086/719755","DOIUrl":null,"url":null,"abstract":"Watersheds in the Great Plains region of the United States are dominated by agriculture, interspersed with remnant or restored prairie vegetation. The pulse-shunt concept predicts these coexisting land uses likely have opposing effects on seasonal biogeochemical and hydrological controls of organic C (OC) fates in freshwater ecosystems, but few studies have focused on temporal patterns of OC fates in streams that are influenced by agriculture and tallgrass prairie. We estimated stream metabolism and OC spiraling in a stream (Glacier Creek, Omaha, Nebraska, USA) draining a mixed land-use watershed with restored tallgrass prairie and agriculture to answer: 1) Does a mixed land-use stream exhibit seasonal patterns of ecosystem metabolism? and 2) Does the balance between active OC processing vs passive OC transport change across seasons and years as predicted by the pulse-shunt concept? We hypothesized that the stream would be net heterotrophic, rapidly mineralize OC (Vf-OC), and exhibit short spiraling lengths (SOC) at baseflow, and that these functions would be modulated in opposing directions by seasonal patterns of nutrient availability and turbidity. Mean gross primary production was 0.30 g O2 m−2 d−1, mean ecosystem respiration was −1.25 g O2 m−2 d−1, and Glacier Creek was net heterotrophic throughout the study (mean net ecosystem production = −0.94 g O2 m−2 d−1; mean production:respiration = 0.19). Peak gross primary production and ecosystem respiration occurred in the spring driven by discharge and light. High-resolution OC-spiraling estimates revealed a continuum of OC processing and transport consistent with pulse-shunt fluxes. OC-spiraling lengths spanned 2 orders of magnitude (1–934 km), but most SOC ranged between distances of 4 to 15 km at baseflow. SOC was shorter with higher nutrient concentrations and longer with higher turbidity, consistent with the inverse pattern for Vf-OC. Our study confirms that the metabolic regime of a prairie stream was seasonal, while underscoring that factors that are modified by land-use change, such as nutrients and turbidity, can influence OC processing.","PeriodicalId":48926,"journal":{"name":"Freshwater Science","volume":"41 1","pages":"284 - 298"},"PeriodicalIF":1.7000,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Evidence for pulse-shunt carbon exports from a mixed land-use, restored prairie watershed\",\"authors\":\"David Manning, A. Dere, Andrew Miller, Tracy J. Coleman\",\"doi\":\"10.1086/719755\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Watersheds in the Great Plains region of the United States are dominated by agriculture, interspersed with remnant or restored prairie vegetation. The pulse-shunt concept predicts these coexisting land uses likely have opposing effects on seasonal biogeochemical and hydrological controls of organic C (OC) fates in freshwater ecosystems, but few studies have focused on temporal patterns of OC fates in streams that are influenced by agriculture and tallgrass prairie. We estimated stream metabolism and OC spiraling in a stream (Glacier Creek, Omaha, Nebraska, USA) draining a mixed land-use watershed with restored tallgrass prairie and agriculture to answer: 1) Does a mixed land-use stream exhibit seasonal patterns of ecosystem metabolism? and 2) Does the balance between active OC processing vs passive OC transport change across seasons and years as predicted by the pulse-shunt concept? We hypothesized that the stream would be net heterotrophic, rapidly mineralize OC (Vf-OC), and exhibit short spiraling lengths (SOC) at baseflow, and that these functions would be modulated in opposing directions by seasonal patterns of nutrient availability and turbidity. Mean gross primary production was 0.30 g O2 m−2 d−1, mean ecosystem respiration was −1.25 g O2 m−2 d−1, and Glacier Creek was net heterotrophic throughout the study (mean net ecosystem production = −0.94 g O2 m−2 d−1; mean production:respiration = 0.19). Peak gross primary production and ecosystem respiration occurred in the spring driven by discharge and light. High-resolution OC-spiraling estimates revealed a continuum of OC processing and transport consistent with pulse-shunt fluxes. OC-spiraling lengths spanned 2 orders of magnitude (1–934 km), but most SOC ranged between distances of 4 to 15 km at baseflow. SOC was shorter with higher nutrient concentrations and longer with higher turbidity, consistent with the inverse pattern for Vf-OC. Our study confirms that the metabolic regime of a prairie stream was seasonal, while underscoring that factors that are modified by land-use change, such as nutrients and turbidity, can influence OC processing.\",\"PeriodicalId\":48926,\"journal\":{\"name\":\"Freshwater Science\",\"volume\":\"41 1\",\"pages\":\"284 - 298\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2022-03-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Freshwater Science\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1086/719755\",\"RegionNum\":4,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ECOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Freshwater Science","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1086/719755","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ECOLOGY","Score":null,"Total":0}
引用次数: 1

摘要

美国大平原地区的流域以农业为主,其间点缀着残余或恢复的草原植被。脉冲分流概念预测,这些共存的土地利用可能对淡水生态系统中有机碳(OC)命运的季节性生物地球化学和水文控制产生相反的影响,但很少有研究关注受农业和高脂草原影响的溪流中有机碳命运的时间模式。我们估计了溪流(冰川溪,奥马哈,内布拉斯加州,美国)中的溪流代谢和OC螺旋上升,该溪流排放了一个混合土地使用流域,该流域恢复了牛脂草草原和农业,以回答:1)混合土地使用流道是否表现出生态系统代谢的季节性模式?以及2)主动OC处理与被动OC传输之间的平衡是否如脉冲分流概念所预测的那样随季节和年份而变化?我们假设河流将是净异养的,快速矿化OC(Vf-OC),并在基流处表现出短的螺旋长度(SOC),这些功能将受到营养物质可用性和浊度的季节性模式的相反方向的调节。在整个研究过程中,平均初级生产总值为0.30 g O2 m−2 d−1,平均生态系统呼吸为−1.25 g O2 m–2 d−2,冰川溪为净异养(平均生态系统净生产=−0.94 g O2 m³2 d−l;平均生产:呼吸=0.19)。初级生产总值和生态系统呼吸峰值出现在春季,由流量和光照驱动。高分辨率OC螺旋估计揭示了与脉冲分流通量一致的OC处理和传输的连续性。OC螺旋长度跨度为2个数量级(1–934公里),但在基流下,大多数SOC的距离在4至15公里之间。SOC随着营养浓度的升高而缩短,随着浊度的升高而延长,这与Vf-OC的相反模式一致。我们的研究证实了草原溪流的代谢机制是季节性的,同时强调了受土地利用变化影响的因素,如营养物质和浊度,会影响OC的处理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evidence for pulse-shunt carbon exports from a mixed land-use, restored prairie watershed
Watersheds in the Great Plains region of the United States are dominated by agriculture, interspersed with remnant or restored prairie vegetation. The pulse-shunt concept predicts these coexisting land uses likely have opposing effects on seasonal biogeochemical and hydrological controls of organic C (OC) fates in freshwater ecosystems, but few studies have focused on temporal patterns of OC fates in streams that are influenced by agriculture and tallgrass prairie. We estimated stream metabolism and OC spiraling in a stream (Glacier Creek, Omaha, Nebraska, USA) draining a mixed land-use watershed with restored tallgrass prairie and agriculture to answer: 1) Does a mixed land-use stream exhibit seasonal patterns of ecosystem metabolism? and 2) Does the balance between active OC processing vs passive OC transport change across seasons and years as predicted by the pulse-shunt concept? We hypothesized that the stream would be net heterotrophic, rapidly mineralize OC (Vf-OC), and exhibit short spiraling lengths (SOC) at baseflow, and that these functions would be modulated in opposing directions by seasonal patterns of nutrient availability and turbidity. Mean gross primary production was 0.30 g O2 m−2 d−1, mean ecosystem respiration was −1.25 g O2 m−2 d−1, and Glacier Creek was net heterotrophic throughout the study (mean net ecosystem production = −0.94 g O2 m−2 d−1; mean production:respiration = 0.19). Peak gross primary production and ecosystem respiration occurred in the spring driven by discharge and light. High-resolution OC-spiraling estimates revealed a continuum of OC processing and transport consistent with pulse-shunt fluxes. OC-spiraling lengths spanned 2 orders of magnitude (1–934 km), but most SOC ranged between distances of 4 to 15 km at baseflow. SOC was shorter with higher nutrient concentrations and longer with higher turbidity, consistent with the inverse pattern for Vf-OC. Our study confirms that the metabolic regime of a prairie stream was seasonal, while underscoring that factors that are modified by land-use change, such as nutrients and turbidity, can influence OC processing.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Freshwater Science
Freshwater Science ECOLOGY-MARINE & FRESHWATER BIOLOGY
CiteScore
4.10
自引率
0.00%
发文量
49
审稿时长
6-12 weeks
期刊介绍: Freshwater Science (FWS) publishes articles that advance understanding and environmental stewardship of all types of inland aquatic ecosystems (lakes, rivers, streams, reservoirs, subterranean, and estuaries) and ecosystems at the interface between aquatic and terrestrial habitats (wetlands, riparian areas, and floodplains). The journal regularly features papers on a wide range of topics, including physical, chemical, and biological properties of lentic and lotic habitats; ecosystem processes; structure and dynamics of populations, communities, and ecosystems; ecology, systematics, and genetics of freshwater organisms, from bacteria to vertebrates; linkages between freshwater and other ecosystems and between freshwater ecology and other aquatic sciences; bioassessment, conservation, and restoration; environmental management; and new or novel methods for basic or applied research.
×
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
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
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 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信