Soil Respirations from experiemental plots near Toolik Lake, AK for 2002

Abstract: 

Soil respiration of carbon dioxide, and methane in waters from wet sedge plots near Toolik Lake, AK during the summer of 2002.

Project Keywords: 

Data set ID: 

10369

EML revision ID: 

2
Published on EDI/LTER Data Portal

Citation: 

Johnson, L., Nadelhoffer, K., Kling, G. 2004. Soil Respirations from experiemental plots near Toolik Lake, AK for 2002 Environmental Data Initiative. http://dx.doi.org/10.6073/pasta/7ae75645e026783edfd8eca8e8973fd6
People

Owner/Creator: 

Contact: 

Additional People: 

Associated Researcher
Associated Researcher
Associated Researcher
Associated Researcher
Associated Researcher
Dates

Date Range: 

Wednesday, June 5, 2002 to Thursday, August 22, 2002

Publication Date: 

2004

Methods: 

Plot location was chosen based on dominate vegetation type (T or W). The tussock tundra plots are located near the Moist Acidic Tundra plots characterized by Shaver and Chapin (1991). The wet sedge plots are located near the outlet of Toolik Lake; all plots have been used by the Arctic LTER project at Toolik Lake.

In wet sedge tundra, three 1 m2-sized plots were positioned randomly in each of two treatments of block 2 of the LTER wet sedge scheme (outlet site), control and N+P-fertilized , respectively, in 2000. Paired control and fertilized plots were labelled with 14C and 15N at one of three different dates of the summer season 2001.

In moist acidic tussock tundra six 1 m2 sized plots were positioned in three of the "X" (=extra") blocks of the LTER scheme, in 2001, inside an area extending 5 m from the boardwalks and, positioning plots so that similar area shares between tussocks and intertussock areas was achieved. In each of the three X blocks two 1m2-sized plots were established. The whole 5 m area of the X blocks extending from the board walks was divided into two halfs, each containing one of the 1m2 sized plots. One half was set aside as the control and the other half was designated to be fertilized. Fertilization with a Hoagland solution (see protocol) started in late summer 2001, and was repeated annually after that , early in the summer season. Paired control and fertilized plots were labelled with 14C and 15N of the summer season 2002; all three pairs were labelled as closely together in time as logistically possible.

In each plot we installed two soil collars. On collection days we would place the collar cap on the collar, and wait 40 minutes to build up CO2 concentration in the headspace. We extracted 120 mL gas sample using a plastic 140 ml syringe with 6inch needle through collar septum. We transferred ~10 ml gas from original syringe into 20 ML nylon syringe to run on a Shimadzu Model 14A gas chromatograph with a flame ionization detector (FID) for CO2 and CH4 content.

Shaver, G.R., and F.S. Chapin. 1991. Production - biomass relationships and elemental cycling in contrasting arctic vegetation types. Ecological Monographs 61(1): 1-31.

Version Changes: 

Entered metadata into new metadata form.
Version 2: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 27Jan14

Sites sampled.

Full Metadata and data files (either comma delimited (csv) or Excel) - Environmental Data Initiative repository.

Use of the data requires acceptance of the data use policy --> Arctic LTER Data Use Policy