Light and flow regimes regulate the metabolism of rivers

Author:

Bernhardt Emily S.1ORCID,Savoy Phil12,Vlah Michael J.1,Appling Alison P.3,Koenig Lauren E.345,Hall Robert O.5ORCID,Arroita Maite6,Blaszczak Joanna R.57,Carter Alice M.15,Cohen Matt8,Harvey Judson W.3,Heffernan James B.9,Helton Ashley M.410,Hosen Jacob D.11,Kirk Lily8,McDowell William H.12ORCID,Stanley Emily H.13ORCID,Yackulic Charles B.14ORCID,Grimm Nancy B.15ORCID

Affiliation:

1. Department of Biology, Duke University, Durham, NC 27708

2. US Geological Survey (contractor), Water Mission Area, Reston, VA 20192

3. US Geological Survey, Water Mission Area, Reston, VA 20192

4. Department of Natural Resources and the Environment, University of Connecticut, Storrs, CT 06232

5. Flathead Lake Biological Station, University of Montana, Polson, MT 59860

6. Department of Plant Biology and Ecology, University of the Basque Country, Bilbao 48080, Spain

7. Natural Resources and Environmental Science Department, University of Nevada, Reno, NV 89557

8. School of Forest, Fisheries and Geomatics Sciences, University of Florida, Gainesville, FL 32611

9. Nicholas School of the Environment, Duke University, Durham, NC 27708

10. The Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, CT 06232

11. Department of Forestry & Natural Resources, Purdue University, West Lafayette, IN 47906

12. Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH 03824

13. Center for Limnology, University of Wisconsin, Madison, WI 53706

14. US Geological Survey, Southwest Biological Science Center, Flagstaff, AZ 86001

15. School of Life Sciences, Arizona State University, Tempe, AZ 85287

Abstract

Significance This paper provides a comprehensive analysis of the annual patterns of ecosystem productivity and respiration for more than 200 rivers, comparing the magnitude and phenology of river metabolic regimes with annual estimates from more than 150 terrestrial ecosystems. Although mean annual temperature and mean annual precipitation explain much of the variation in terrestrial productivity and are used to define biomes, for rivers the most important controls are annual light availability and flow stability. Attention to these gradients will substantially improve our ability to scale and model river ecosystem dynamics and may fundamentally change the way rivers are studied.

Funder

National Science Foundation

Publisher

Proceedings of the National Academy of Sciences

Subject

Multidisciplinary

Reference45 articles.

1. R. H. Whittaker, Communities and Ecosystems (MacMillan, ed. 2, 1975).

2. W. H. Schlesinger, E. S. Bernhardt, Biogeochemistry: An Analysis of Global Change (Elsevier, ed. 4, 2021).

3. Pre-industrial and contemporary fluxes of nitrogen through rivers: a global assessment based on typology

4. The boundless carbon cycle

5. Plumbing the Global Carbon Cycle: Integrating Inland Waters into the Terrestrial Carbon Budget

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