气候变化领域集成服务门户(CCPortal): Water column contributions to the metabolism and nutrient dynamics of mid-sized rivers

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DOI	10.1007/s10533-021-00768-w
	Water column contributions to the metabolism and nutrient dynamics of mid-sized rivers
	Reisinger A.J.; Tank J.L.; Hall R.O.; Rosi E.J.; Baker M.A.; Genzoli L.
发表日期	2021
ISSN	1682563
起始页码	67
结束页码	84
卷号	153 期号:1
英文摘要	Lotic and lentic ecosystems are traditionally viewed as dominated by either benthic or water column processes. However, mid-sized rivers represent a transition zone where both benthic and water column processes may both contribute substantially to ecosystem dynamics. Ecosystem processes such as gross primary production (GPP), ecosystem respiration (ER), or nutrient uptake, and the relative contribution of the water column to these processes at the reach scale, are poorly understood in non-wadeable, mid-sized rivers. To clarify the role of the water column at the reach-scale, and to quantify controls on water column processes, we measured GPP, ER, and uptake of nitrate (NO3−), ammonium (NH4+), and soluble reactive phosphorus (SRP) in the water columns of 15 mid-sized rivers (discharge: 13.5–83.3 m3 s−1) spanning nutrient and total suspended solids gradients. We compared water column metabolic and nutrient uptake rates to reach-scale rates to estimate the contribution of the water column to the entire river. Water column metabolism was autotrophic on the day when measured, GPP increased with nutrient availability, and the water column contributed more to whole river GPP than to ER. Water column nutrient uptake increased with GPP across solutes, and there was a positive relationship between human land use and water column uptake of NO3−–N and SRP. The water column accounted for a substantial proportion of reach-scale metabolism and nutrient uptake, but this contribution depended on suspended material and nutrient availability. Integrating the water column into theory describing lotic ecosystem function should clarify mechanisms controlling metabolism and nutrient processing and enhance management of non-wadeable rivers. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG part of Springer Nature.
英文关键词	Ecosystem respiration; Gross primary production; Metabolism; Nutrient uptake; River; Water column
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184620
作者单位	Soil and Water Sciences Department, University of Florida, Gainesville, FL 32606, United States; Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, United States; Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071, United States; Flathead Lake Biological Station, University of Montana, Polson, MT 59860, United States; Cary Institute of Ecosystem Studies, Millbrook, NY 12545, United States; Department of Biology and the Ecology Center, Utah State University, Logan, UT 84322, United States; Department of Biological Sciences, University of Montana, Missoula, MT 59812, United States
推荐引用方式 GB/T 7714	Reisinger A.J.,Tank J.L.,Hall R.O.,et al. Water column contributions to the metabolism and nutrient dynamics of mid-sized rivers[J],2021,153(1).
APA	Reisinger A.J.,Tank J.L.,Hall R.O.,Rosi E.J.,Baker M.A.,&Genzoli L..(2021).Water column contributions to the metabolism and nutrient dynamics of mid-sized rivers.Biogeochemistry,153(1).
MLA	Reisinger A.J.,et al."Water column contributions to the metabolism and nutrient dynamics of mid-sized rivers".Biogeochemistry 153.1(2021).