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Ecosystem metabolism for an arctic warm spring-stream

Summary

This dataset investigated the productivity of a perennial, Arctic spring-stream. Ivishak Spring has the stable discharge (~131 L/s) and temperature (~4-8 deg C) typical for springs. It is unusual, however, in having an annual cycle of daylight from 24 hrs/d (summer) to 0 hrs/d (winter). It tested the hypothesis that stored detritus would buffer carbon limitation during winter when gross primary production (GPP) is minimized, resulting in constant rates of community respiration (CR) year-round due to constant temperatures. It used open-channel methods to measure GPP and CR monthly from March 2007 to August 2009. Mean annual GPP was 458 gC/m2. Such a level is typical for temperate desert-streams but was surprising for an Arctic stream. Annual CR (887 gC/m2) was also remarkable. The high metabolism of this stream is explained by an open canopy, moderate year-round temperatures, stable bed, and high bryophyte biomass (48 gAFDM/m2). Strong seasonal cycles of GPP were mirrored by CR (r=0.65) indicating the possibility of carbon limitation during winter. This result falsified our hypothesis that CR would be relatively stable year-round due to a detritus buffer and constant temperature

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Additional information

Identifier
Versions
  • 1.0 (2011-09-07)
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Related projects
Spatial Type point
Frequency 3 minute
Language English
Grant Code 0611995
ISO Topic Categories
  • inlandWaters
Categories
GCMD Science Keywords Expand keywords
Documentation
Related links

Temporal coverage

Begin datetime 2007-03-01 00:00:00
End datetime 2009-08-31 23:59:59

Spatial coverage


Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 69.0251, Minimum (South) Latitude: 69.02367
Minimum (West) Longitude: -147.72067, Maximum (East) Longitude: -147.71943

Primary point of contact information

Alexander D. Huryn <huryn@bama.edu>

Additional contact information

Citation

Example citation following ESIP guidelines:

Huryn, A., Benstead, J. 2011. Ecosystem metabolism for an arctic warm spring-stream. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.5065/D6WH2N4K. Accessed 28 Nov 2020.

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