Temperature, discharge and light data for Ivishak Hot Spring, Alaska
The productivity of a perennial, Arctic spring-stream was investigated. 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 was tested from 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. Open-channel methods were used 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 the hypothesis that CR would be relatively stable year-round due to a detritus buffer and constant temperature.
- download: NSF Arctic Data Center
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|Begin datetime||2006-08-08 00:00:00|
|End datetime||2009-08-05 23:59:59|
Map data from IBCSO, IBCAO, and Global Topography.
Maximum (North) Latitude:
Minimum (South) Latitude:
Minimum (West) Longitude: -147.721, Maximum (East) Longitude: -147.719
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Alexander D. Huryn <email@example.com>
Additional contact information
- author: Alexander D. Huryn <firstname.lastname@example.org>
- author: Jonathan P. Benstead <email@example.com>
- principalInvestigator: Alexander D. Huryn <firstname.lastname@example.org>
- principalInvestigator: Jonathan P. Benstead <email@example.com>
CitationExample citation following ESIP guidelines:
Huryn, A., Benstead, J. 2011. Temperature, discharge and light data for Ivishak Hot Spring, Alaska. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.5065/D6N014PT. Accessed 07 Jun 2023.
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