Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10021-015-9918-1 |
Metabolism, Gas Exchange, and Carbon Spiraling in Rivers | |
Hall, Robert O., Jr.1; Tank, Jennifer L.2; Baker, Michelle A.3,4; Rosi-Marshall, Emma J.5; Hotchkiss, Erin R.6,7,8 | |
通讯作者 | Hall, Robert O., Jr. |
来源期刊 | ECOSYSTEMS
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ISSN | 1432-9840 |
EISSN | 1435-0629 |
出版年 | 2016 |
卷号 | 19期号:1页码:73-86 |
英文摘要 | Ecosystem metabolism, that is, gross primary productivity (GPP) and ecosystem respiration (ER), controls organic carbon (OC) cycling in stream and river networks and is expected to vary predictably with network position. However, estimates of metabolism in small streams outnumber those from rivers such that there are limited empirical data comparing metabolism across a range of stream and river sizes. We measured metabolism in 14 rivers (discharge range 14-84 m(3) s(-1)) in the Western and Midwestern United States (US). We estimated GPP, ER, and gas exchange rates using a Lagrangian, 2-station oxygen model solved in a Bayesian framework. GPP ranged from 0.6-22 g O-2 m(-2) d(-1) and ER tracked GPP, suggesting that autotrophic production supports much of riverine ER in summer. Net ecosystem production, the balance between GPP and ER was 0 or greater in 4 rivers showing autotrophy on that day. River velocity and slope predicted gas exchange estimates from these 14 rivers in agreement with empirical models. Carbon turnover lengths (that is, the distance traveled before OC is mineralized to CO2) ranged from 38 to 1190 km, with the longest turnover lengths in high-sediment, arid-land rivers. We also compared estimated turnover lengths with the relative length of the river segment between major tributaries or lakes; the mean ratio of carbon turnover length to river length was 1.6, demonstrating that rivers can mineralize much of the OC load along their length at baseflow. Carbon mineralization velocities ranged from 0.05 to 0.81 m d(-1), and were not different than measurements from small streams. Given high GPP relative to ER, combined with generally short OC spiraling lengths, rivers can be highly reactive with regard to OC cycling. |
英文关键词 | rivers gross primary production Ecosystem respiration carbon spiraling gas exchange ecosystem metabolism |
类型 | Article |
语种 | 英语 |
国家 | USA ; Canada |
收录类别 | SCI-E |
WOS记录号 | WOS:000373017800006 |
WOS关键词 | ECOSYSTEM METABOLISM ; ORGANIC-CARBON ; TEMPORAL VARIABILITY ; RESPIRATION ; PRODUCTIVITY ; REAERATION ; RATES ; RESTORATION ; CONTINUUM ; NITROGEN |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/192516 |
作者单位 | 1.Univ Wyoming, Dept Zool & Physiol, Laramie, WY 82071 USA; 2.Univ Notre Dame, Dept Biol Sci, Notre Dame, IN 46556 USA; 3.Utah State Univ, Dept Biol, Logan, UT 84322 USA; 4.Utah State Univ, Ctr Ecol, Logan, UT 84322 USA; 5.Cary Inst Ecosyst Studies, Box AB, Millbrook, NY 12545 USA; 6.Univ Wyoming, Program Ecol, Laramie, WY 82071 USA; 7.Univ Wyoming, Dept Zool & Physiol, Laramie, WY 82071 USA; 8.Univ Quebec, Dept Sci Biol, Montreal, PQ H3C 3P8, Canada |
推荐引用方式 GB/T 7714 | Hall, Robert O., Jr.,Tank, Jennifer L.,Baker, Michelle A.,et al. Metabolism, Gas Exchange, and Carbon Spiraling in Rivers[J],2016,19(1):73-86. |
APA | Hall, Robert O., Jr.,Tank, Jennifer L.,Baker, Michelle A.,Rosi-Marshall, Emma J.,&Hotchkiss, Erin R..(2016).Metabolism, Gas Exchange, and Carbon Spiraling in Rivers.ECOSYSTEMS,19(1),73-86. |
MLA | Hall, Robert O., Jr.,et al."Metabolism, Gas Exchange, and Carbon Spiraling in Rivers".ECOSYSTEMS 19.1(2016):73-86. |
条目包含的文件 | ||||||
文件名称/大小 | 资源类型 | 版本类型 | 开放类型 | 使用许可 | ||
Metabolism, Gas Exch(943KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 |
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