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Variation in particulate C : N : P stoichiometry across the Lake Erie watershed from tributaries to its outflow

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posted on 30.01.2018, 10:45 authored by Clay Prater, Paul C. Frost, E. Todd Howell, Susan B. Watson, Arthur Zastepa, Sarah S.E. King, Richard J. Vogt, Marguerite A. Xenopoulos
© 2017 The Authors Limnology and Oceanography published by Wiley Periodicals, Inc. on behalf of Association for the Sciences of Limnology and Oceanography Human activities can cause large alterations in biogeochemical cycles of key nutrients such as carbon (C), nitrogen (N), and phosphorus (P). However, relatively little is known about how these changes alter the proportional fluxes of these elements across ecosystem boundaries from rivers to lakes. Here, we examined environmental factors influencing spatial and temporal variation in particulate C : N : P ratios across the Lake Erie watershed from its tributaries to its outflow. Throughout the study, particulate nutrient ratios ranged widely (C : N 2.0–25.8, C : P 32–530, N : P 3.7–122.9), but mean values were generally lower than previous estimates from different aquatic environments. Particulate C : N ratios varied the least across all environments, but C : P and N : P ratios increased between tributaries and coastal areas and throughout the growing season in coastal environments. These ratios also differed temporally in offshore waters as particulate C : P and N : P were higher in the spring and summer and lower in the fall and winter. Particulate C : P ratios also increased between the western/central and eastern basins indicating differential nutrient processing across the lake. These stoichiometric changes were associated with unique environmental factors among ecosystems as tributary stoichiometry was related to terrestrial land use and land cover, coastal ratios were a product of mixing between riverine and offshore waters, and offshore patterns were influenced by differences in temperature and particulate nutrient loading among basins. Overall, by studying changes in particulate C : N : P ratios across the Lake Erie watershed, our study demonstrates the power of using mass balance principles to study nutrient transformations along the aquatic continuum.

Funding

This work was funded by Canada’s Natural Sciences and Engineering Research Council (NSERC) Strategic Project, the Ontario Ministry of the Environment and Climate Change, and by Environment and Climate Change Canada’s Great Lakes Nutrient Initiation (GLNI).

History

School

  • Social Sciences

Department

  • Geography and Environment

Published in

Limnology and Oceanography

Volume

62

Pages

S194 - S206

Citation

PRATER, C. ...et al., 2017. Variation in particulate C : N : P stoichiometry across the Lake Erie watershed from tributaries to its outflow. Limnology and Oceanography, 62, pp. S194-S206.

Publisher

© The Authors. Published by Wiley

Version

VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial (CC BY-NC 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc/4.0/

Acceptance date

20/06/2017

Publication date

2017

Notes

This is an Open Access Article. It is published by Wiley under the Creative Commons Attribution-NonCommercial 4.0 Licence (CC BY-NC). Full details of this licence are available at: http://creativecommons.org/licenses/by-nc/4.0/

eISSN

1939-5590

Language

en

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