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Light and flow regimes regulate the metabolism of rivers.

Publication ,  Journal Article
Bernhardt, ES; Savoy, P; Vlah, MJ; Appling, AP; Koenig, LE; Hall, RO; Arroita, M; Blaszczak, JR; Carter, AM; Cohen, M; Harvey, JW; Helton, AM ...
Published in: Proceedings of the National Academy of Sciences of the United States of America
February 2022

Mean annual temperature and mean annual precipitation drive much of the variation in productivity across Earth's terrestrial ecosystems but do not explain variation in gross primary productivity (GPP) or ecosystem respiration (ER) in flowing waters. We document substantial variation in the magnitude and seasonality of GPP and ER across 222 US rivers. In contrast to their terrestrial counterparts, most river ecosystems respire far more carbon than they fix and have less pronounced and consistent seasonality in their metabolic rates. We find that variation in annual solar energy inputs and stability of flows are the primary drivers of GPP and ER across rivers. A classification schema based on these drivers advances river science and informs management.

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Published In

Proceedings of the National Academy of Sciences of the United States of America

DOI

EISSN

1091-6490

ISSN

0027-8424

Publication Date

February 2022

Volume

119

Issue

8

Start / End Page

e2121976119

Related Subject Headings

  • Weather
  • Temperature
  • Seasons
  • Rivers
  • Light
  • Ecosystem
  • Carbon
 

Citation

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Bernhardt, E. S., Savoy, P., Vlah, M. J., Appling, A. P., Koenig, L. E., Hall, R. O., … Grimm, N. B. (2022). Light and flow regimes regulate the metabolism of rivers. Proceedings of the National Academy of Sciences of the United States of America, 119(8), e2121976119. https://doi.org/10.1073/pnas.2121976119
Bernhardt, Emily S., Phil Savoy, Michael J. Vlah, Alison P. Appling, Lauren E. Koenig, Robert O. Hall, Maite Arroita, et al. “Light and flow regimes regulate the metabolism of rivers.Proceedings of the National Academy of Sciences of the United States of America 119, no. 8 (February 2022): e2121976119. https://doi.org/10.1073/pnas.2121976119.
Bernhardt ES, Savoy P, Vlah MJ, Appling AP, Koenig LE, Hall RO, et al. Light and flow regimes regulate the metabolism of rivers. Proceedings of the National Academy of Sciences of the United States of America. 2022 Feb;119(8):e2121976119.
Bernhardt, Emily S., et al. “Light and flow regimes regulate the metabolism of rivers.Proceedings of the National Academy of Sciences of the United States of America, vol. 119, no. 8, Feb. 2022, p. e2121976119. Epmc, doi:10.1073/pnas.2121976119.
Bernhardt ES, Savoy P, Vlah MJ, Appling AP, Koenig LE, Hall RO, Arroita M, Blaszczak JR, Carter AM, Cohen M, Harvey JW, Heffernan JB, Helton AM, Hosen JD, Kirk L, McDowell WH, Stanley EH, Yackulic CB, Grimm NB. Light and flow regimes regulate the metabolism of rivers. Proceedings of the National Academy of Sciences of the United States of America. 2022 Feb;119(8):e2121976119.
Journal cover image

Published In

Proceedings of the National Academy of Sciences of the United States of America

DOI

EISSN

1091-6490

ISSN

0027-8424

Publication Date

February 2022

Volume

119

Issue

8

Start / End Page

e2121976119

Related Subject Headings

  • Weather
  • Temperature
  • Seasons
  • Rivers
  • Light
  • Ecosystem
  • Carbon