Seasonal patterns of leaf exsertion, elongation and senescence for Eriophorum vaginatum and Carex bigelowii was measured in mesic tussock tundra sites 1985 to 1986, near Toolik Lake, AK.

Abstract: 

Seasonal patterns of leaf exsertion, elongation and senescence for Eriophorum vaginatum and Carex bigelowii was measured in mesic tussock tundra sites near Toolik Lake, AK. In addition, the response of both species to NP fertilizer and to variation in site fertility (after track versus non-track areas) were also assayed and compared. The research was done over two full growing seasons.

Project Keywords: 

Data set ID: 

1412

EML revision ID: 

6
Published on EDI/LTER Data Portal

Citation: 

Shaver, G. 1987. Seasonal patterns of leaf exsertion, elongation and senescence for Eriophorum vaginatum and Carex bigelowii was measured in mesic tussock tundra sites 1985 to 1986, near Toolik Lake, AK. Environmental Data Initiative. http://dx.doi.org/10.6073/pasta/9340f235aed5e4db991070d02b8f5c2a
People
Dates

Date Range: 

Saturday, June 1, 1985 to Sunday, September 1, 1985

Publication Date: 

1987

Methods: 

Both sites were in typical moist acidic sedge tussock tundra in which E. vaginatum was the dominant graminoid and C. bigelowii was subdominant. The comparison of control and fertilized plots was part of the same experiment described by Chapin and Shaver (1985). The fertilizer treatment consisted of annual application of 10 g per m2 of N (as NH4NO3) and 5 g per m2 P (as triple superphosphate), beginning in 1982. The microenvironmental comparison was done at Imanavait Creek, about 10 km NE of Toolik Lake. At Imnavait Creek we compared leaf growth in "non-track" tussock tundra and in "water tracks", which are areas of above-average surface and subsurface water flow.

Notes: Only tillers that did not flower are included in this file. When measurements stopped due to tiller death or herbivory a #N/A is recorded.. Where there are no values or the tiller senescent zeros are used. In cases where the total leaf length was unknown because of broken leaf tips the longest previous leaf length was used. In most cases these leaves had stopped growing.

Reference Citations: Chapin,FS,III; Shaver,GR (1985): Individualistic growth response of tundra plant species to manipulation of light, temperature and nutrients in a field experiment. Ecology 66, 564-576
Shaver,GR and JA Laundre(In prep.) Leaf exsertion, leaf elongation,
and leaf senescence in Eriophorum vaginatum and Carex bigelowii
in northern Alaska.

Sampling Description.

Measurements of leaf growth were made throughout the 1985 and 1986 growing seasons at approximately 10-day intervals. The tillers were selected haphazardly, with the restriction that they had to be near the edges of the study plots so that they could be measured without excessive trampling in the plot. The tillers were tagged and labeled, with individuals numbered 1-20. The older leaves that had no visible green tissue were clipped at the base to equal lengths. The clipped leaves were used as the 0 point to measure the total length and green length of all of the remaining leaves.

Version Changes: 

Log of changes:

10Oct96 Checked and organized data for comma delimited output. JL
Version 2: Updated attributes and add DAS control Jan 2010 JimL
Version 3: Upadte LTERNET Data Access server proxy link for Excel and comma delimited data files. Changed from knb to das in url.
Version 4: Updated metadata form to newer version (without site sheet). Fixed discrepency with header variable names. CH 24 Jan 2013. Updated to newer metadata with site sheet. CH March 2013.
Version 5: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 17Feb14
Version 6: Changed Distrubution URL since the LTER network DAS system is being discontinued. JimL 9Apr2015

Sites sampled.

Download a comma delimited (csv) or Excel file (includes metadata and data sheets).

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

To cite this data set see the citation example on the LTER Network Data Portal page for this data set.

File 86gsgrow.csv

Seasonal patterns of... File Details

Office spreadsheet icon 86gsgrow.xls

Excel file with... File Details