Aarhus University Seal / Aarhus Universitets segl

Biofilm Growth in Two Streams Draining Mountainous Permafrost Catchments in NE Greenland

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Standard

Biofilm Growth in Two Streams Draining Mountainous Permafrost Catchments in NE Greenland. / Pastor, A.; Wu, N.; Skovsholt, L. J.; Riis, T.

I: Journal of Geophysical Research: Biogeosciences, Bind 125, Nr. 3, e2019JG005557, 03.2020.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Pastor, A, Wu, N, Skovsholt, LJ & Riis, T 2020, 'Biofilm Growth in Two Streams Draining Mountainous Permafrost Catchments in NE Greenland', Journal of Geophysical Research: Biogeosciences, bind 125, nr. 3, e2019JG005557. https://doi.org/10.1029/2019JG005557

APA

Pastor, A., Wu, N., Skovsholt, L. J., & Riis, T. (2020). Biofilm Growth in Two Streams Draining Mountainous Permafrost Catchments in NE Greenland. Journal of Geophysical Research: Biogeosciences, 125(3), [e2019JG005557]. https://doi.org/10.1029/2019JG005557

CBE

Pastor A, Wu N, Skovsholt LJ, Riis T. 2020. Biofilm Growth in Two Streams Draining Mountainous Permafrost Catchments in NE Greenland. Journal of Geophysical Research: Biogeosciences. 125(3):Article e2019JG005557. https://doi.org/10.1029/2019JG005557

MLA

Vancouver

Pastor A, Wu N, Skovsholt LJ, Riis T. Biofilm Growth in Two Streams Draining Mountainous Permafrost Catchments in NE Greenland. Journal of Geophysical Research: Biogeosciences. 2020 mar;125(3). e2019JG005557. https://doi.org/10.1029/2019JG005557

Author

Pastor, A. ; Wu, N. ; Skovsholt, L. J. ; Riis, T. / Biofilm Growth in Two Streams Draining Mountainous Permafrost Catchments in NE Greenland. I: Journal of Geophysical Research: Biogeosciences. 2020 ; Bind 125, Nr. 3.

Bibtex

@article{e5b01feeee38473a9f637438efe0e18e,
title = "Biofilm Growth in Two Streams Draining Mountainous Permafrost Catchments in NE Greenland",
abstract = "The objective of this study was to evaluate how stream water nutrient concentrations influence biofilm accrual in streams draining mountainous permafrost headwaters. We selected six stream locations in the Zackenberg area (NE Greenland, 74°N) subjected to a gradient in the areal contribution of different geomorphological units in the watersheds and channel stability. We used nutrient diffusing substrates to evaluate biofilm growth (autotrophic and total biomass). We found elevated stream nitrate concentrations in samples from upstream reaches draining larger areas of solifluction sheets and bare rock and with higher channel instability. Nitrate had the highest standardized effect on autotrophic biofilm growth on control disks. However, stream biofilm growth was not nutrient limited as shown by the absence of an increase in biofilm biomass as a response to the experimental nutrient additions. The response to nutrient additions via diffusing substrates depended on the altitude gradient. Overall, our results showed stream nitrogen availability to be one of the main drivers of algal biofilm accrual in high-Arctic streams, suggesting that the predicted changes in nutrient exports induced by climate change will have strong impacts on the biogeochemistry and ecological functioning of high-Arctic streams.",
keywords = "biofilm, High Arctic, nitrogen, phosphorous, stream",
author = "A. Pastor and N. Wu and Skovsholt, {L. J.} and T. Riis",
year = "2020",
month = mar,
doi = "10.1029/2019JG005557",
language = "English",
volume = "125",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "3",

}

RIS

TY - JOUR

T1 - Biofilm Growth in Two Streams Draining Mountainous Permafrost Catchments in NE Greenland

AU - Pastor, A.

AU - Wu, N.

AU - Skovsholt, L. J.

AU - Riis, T.

PY - 2020/3

Y1 - 2020/3

N2 - The objective of this study was to evaluate how stream water nutrient concentrations influence biofilm accrual in streams draining mountainous permafrost headwaters. We selected six stream locations in the Zackenberg area (NE Greenland, 74°N) subjected to a gradient in the areal contribution of different geomorphological units in the watersheds and channel stability. We used nutrient diffusing substrates to evaluate biofilm growth (autotrophic and total biomass). We found elevated stream nitrate concentrations in samples from upstream reaches draining larger areas of solifluction sheets and bare rock and with higher channel instability. Nitrate had the highest standardized effect on autotrophic biofilm growth on control disks. However, stream biofilm growth was not nutrient limited as shown by the absence of an increase in biofilm biomass as a response to the experimental nutrient additions. The response to nutrient additions via diffusing substrates depended on the altitude gradient. Overall, our results showed stream nitrogen availability to be one of the main drivers of algal biofilm accrual in high-Arctic streams, suggesting that the predicted changes in nutrient exports induced by climate change will have strong impacts on the biogeochemistry and ecological functioning of high-Arctic streams.

AB - The objective of this study was to evaluate how stream water nutrient concentrations influence biofilm accrual in streams draining mountainous permafrost headwaters. We selected six stream locations in the Zackenberg area (NE Greenland, 74°N) subjected to a gradient in the areal contribution of different geomorphological units in the watersheds and channel stability. We used nutrient diffusing substrates to evaluate biofilm growth (autotrophic and total biomass). We found elevated stream nitrate concentrations in samples from upstream reaches draining larger areas of solifluction sheets and bare rock and with higher channel instability. Nitrate had the highest standardized effect on autotrophic biofilm growth on control disks. However, stream biofilm growth was not nutrient limited as shown by the absence of an increase in biofilm biomass as a response to the experimental nutrient additions. The response to nutrient additions via diffusing substrates depended on the altitude gradient. Overall, our results showed stream nitrogen availability to be one of the main drivers of algal biofilm accrual in high-Arctic streams, suggesting that the predicted changes in nutrient exports induced by climate change will have strong impacts on the biogeochemistry and ecological functioning of high-Arctic streams.

KW - biofilm

KW - High Arctic

KW - nitrogen

KW - phosphorous

KW - stream

UR - http://www.scopus.com/inward/record.url?scp=85082424685&partnerID=8YFLogxK

U2 - 10.1029/2019JG005557

DO - 10.1029/2019JG005557

M3 - Journal article

AN - SCOPUS:85082424685

VL - 125

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 3

M1 - e2019JG005557

ER -