What question did this study set out to answer?

To determine how discrete riparian groundwater inflow points supplying dissolved organic matter influence the spatial distribution and overall rates of heterotrophic microbial activity in a boreal stream.

February 3, 2023Limnology and Oceanography LettersOpen Access

Groundwater‐stream connections shape the spatial pattern and rates of aquatic metabolism

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Authors

ALAnna LuponCentre d'Estudis Avançats de Blanes LGLluís Gómez‐GenerInstitut de Biologia Evolutiva MFMegan L. ForkWest Chester University

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Implication

Biogeochemical study reveals that discrete groundwater inflows increase heterotrophic metabolism in a boreal stream, highlighting how lateral hydrological connectivity drives watershed carbon cycling.

Key Points

To determine how discrete riparian groundwater inflow points supplying dissolved organic matter influence the spatial distribution and overall rates of heterotrophic microbial activity in a boreal stream.
Conducted laboratory bioassays to evaluate the spatial and temporal influence of discrete riparian inflow point (DRIP) water and dissolved organic matter (DOM) composition on heterotrophic microbial activity.
Performed reach-scale field additions of resazurin, a metabolic tracer, to quantify in-stream heterotrophic activity under varying degrees of hydrological connectivity.
Laboratory bioassays revealed that microbial heterotrophic activity varied across space and time in response to the specific content and composition of incoming dissolved organic matter.
Reach-scale field additions demonstrated that groundwater confluences substantially increased both spatial heterogeneity and whole-reach rates of heterotrophic activity, with effects amplified during periods of high hydrological connectivity.

Cite This Study

Lupon et al. (2023) studied this question.

synapsesocial.com/papers/6aab8a5816249eee19a07965 https://doi.org/10.1002/lol2.10305

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Groundwater‐stream connections shape the spatial pattern and rates of aquatic metabolism

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Implication

Key Points

Cite This Study

Groundwater‐stream connections shape the spatial pattern and rates of aquatic metabolism

Discussion

Member takes

Implication

Key Points

Cite This Study

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