\log
The original iteration of this file was created from a 12 April 1995
email message from Melany Fisk to Rick Ingersoll. The message was
archived in /data1/Datman/Mfisk/Roots/Archive. The current file
was put under sccs control on 17 April 1995.[RCI 17 April 1995]
Suggested revisions provided by Melany Fisk on 25 April 1995 were
incorporated into the file on 8 May 1995.[RCI 8 May 1995] Investigator
contact information was updated on 23 May 1996.[MAH 23 May 1996]
Investigator contact information was updated, and the Fisk 1995,
Fisk and Schmidt 1995, and Fisk et al. 1998 citations were added
on 2 December 1998.[MAH 2 December 1998]
\doc
TITLE. Fine root production and nitrogen uptake in 3 alpine plant
communities.
ABSTRACT. Root production was estimated in dry, moist, and wet meadow
communities on Niwot Ridge using a root-ingrowth core method. Columns
of root-free soil were established on 1 June 1994 and were re-cored on
10 August and 23 September 1994 for measurement of fine root mass and
nitrogen content.
INVESTIGATOR. Melany Fisk, Department of Natural Resources, 8 Fernow Hall,
Cornell University, Ithaca, NY 14853, (607) 255-1067, mcf9@cornell.edu.
VARIABLES. fine root dry mass, nitrogen concentration, total N content.
KEYWORDS. belowground production, root N uptake, Biogeochemistry, vegetation pools.
LOCATION. Study areas included a south-facing slope in the City of Boulder
watershed, a site in the Saddle, and a north-facing slope north of the
Saddle. Samples and original data are stored in Ramaley Hall (Room C-373).
TIMING. begin 1 June 1994, ongoing (to September 1995), once or twice
per year.
CITATIONS. [1]Fisk, M.C. 1995. Nitrogen dynamics in an alpine landscape.
Ph.D. dissertation, University of Colorado, Boulder. 114 pp.
[2]Fisk, M.C. and S.K. Schmidt. 1995. Nitrogen mineralization and microbial
biomass N dynamics in three alpine tundra communities. Soil Science Society
of America Journal 59:1036-1043.
[3]Fisk, M.C., S.K. Schmidt, and T.R. Seastedt. 1998. Topographic patterns
of above- and belowground production and nitrogen cycling in alpine tundra.
Ecology 7:2253-2266.
COMMENTS. Dry meadow community indicates dominance by Kobresia
myosuroides, moist meadow indicates dominance by Acomastylis rossii,
and wet meadow indicates dominance by Carex scopulorum. The south-facing
slope is designated site 1, the Saddle site is site 2, and the north-
facing slope is site 3.
Samples were collected in and around the "trace gas" plots.
Tim Bardsley and Mike Hartman conducted a rudimentary survey of some of
the more heavily used NWT LTER research plots in 1994 in order to
reference the plots to established objects/points on Niwot Ridge.
A Silva Ranger compass was used with E declination set at 12 degrees;
the accuracy of the bearings is +/- 3 degrees. All distances were
measured across the ground surface (not at a fixed horizontal level);
such distances are accurate to +/- 2%. Each trace gas plot consisted
of an area (with an undefined outer boundary) of comparatively
heterogeneous composition (with respect to plant species composition,
or plant community type). Bearings and distances were from fixed
points of reference to the approximate center of the plots (i.e., the
center of the bases within the plot). In some cases (T1D, T2D, T1M,
T1W), bearings were taken from the approximate center of the plot to
a fixed reference point, usually because the plots were not visible
from the fixed reference point. In such cases, the reverse bearing
was calculated and, for the sake of consistency, is listed below.
The original Bardsley/Hartman field notes contain crude diagrams
indicating the relative orientation of and distances between the
bases within a plot; bases were generally within 4 m of the center
of the plot. This information is not reported here but these notes
are on file with the NWT LTER data manager. The plot code, bearing
(degrees) from indicated reference point to center of plot,
distance (meters) from indicated reference point to center of the
plot, and number of bases in plot follow:
T1D,192 (wind turbine centerline),146.1 (wind turbine SW corner),4
T2D,30 (Saddle grid stake 60A),28.60 (Saddle grid stake 60A),4
T3D,40 (Saddle grid stake 78),50.5 (Saddle grid stake 78),5
T1M,254 (wind turbine centerline),48.8 (wind turbine SW corner),4
T2M,87 (Saddle grid stake 59),24.25 (Saddle grid stake 59),4
T3M,41 (Saddle grid stake 77),33.44 (Saddle grid stake 77),8
T1W,220 (wind turbine centerline),153.20 (wind turbine SW corner),4
T2W,230 (Saddle grid stake 67),17.3 (Saddle grid stake 67),4
T3W,25 (Saddle grid stake 77),23.20 (Saddle grid stake 77),4
\type
statistical.
\header
COL1. label=meadow type, type=string, units=none, missing value indicator=,
minimum=, maximum=, precision=
COL2. label=site number, type=string, units=none, missing value indicator=,
minimum=, maximum=, precision=
COL3. label=live fine root dry mass on 8/10/94, type=real, units=g/m2,
missing value indicator=absence of value, minimum=0, maximum=10000,
precision=0.5
COL4. label=live fine root tissue nitrogen concentration on 8/10/94,
type=real, units=percent, missing value indicator=absence of value,
minimum=0, maximum=100, precision=0.01
COL5. label=nitrogen content in live fine roots on 8/10/94, type=real,
units=g/m2, missing value indicator=absence of value, minimum=0,
maximum=250, precision=
COL6. label=dead fine root dry mass on 8/10/94, type=real, units=g/m2,
missing value indicator=absence of value, minimum=0, maximum=10000,
precision=0.5
COL7. label=dead fine root nitrogen concentration on 8/10/94, type=real,
units=percent, missing value indicator=absence of value, minimum=0,
maximum=100, precision=0.01
COL8. label=nitrogen content in dead fine root on 8/10/94, type=real,
units=g/m2, missing value indicator=absence of value, minimum=0,
maximum=250, precision=
COL9. label=total (live plus dead) fine root dry mass on 8/10/94,
type=real, units=g/m2, missing value indicator=absence of value,
minimum=0, maximum=10000, precision=0.5
COL10. label=total fine root nitrogen on 8/10/94 (using live %N),
type=real, units=g/m2, missing value indicator=absence of value,
minimum=0, maximum=10000, precision=0.5
COL11. label=live fine root dry mass on 9/23/94, type=real, units=g/m2,
missing value indicator=absence of value, minimum=0, maximum=10000,
precision=0.5
COL12. label=live fine root nitrogen concentration on 9/23/94, type=real,
units=percent, missing value indicator=absence of value, minimum=0,
maximum=100, precision=0.01
COL13. label=nitrogen content in live fine roots on 9/23/94, type=real,
units=g/m2, missing value indicator=absence of value, minimum=0,
maximum=250, precision=
COL14. label=dead fine root dry mass on 9/23/94, type=real, units=g/m2,
missing value indicator=absence of value, minimum=0, maximum=10000,
precision=0.5
COL15. label=dead fine root nitrogen concentration on 9/23/94, type=real,
units=percent, missing value indicator=absence of value, minimum=0,
maximum=100, precision=0.01
COL16. label=nitrogen content in dead fine roots on 9/23/94, type=real,
units=g/m2, missing value indicator=absence of value, minimum=0,
maximum=250, precision=
COL17. label=total (live plus dead) fine root dry mass on 9/23/94,
type=real, units=g/m2, missing value indicator=absence of value,
minimum=0, maximum=10000, precision=0.5
COL18. label=total fine root nitrogen on 9/23/94 (using live %N),
type=real, units=g/m2, missing value indicator=absence of value,
minimum=0, maximum=10000, precision=0.5
{*********************************************************************
If the data section below contains no data then you will need to
obtain permission from the investigator listed in the documentation
section of this file. If you have obtained permission or if the data
are already contained in this file, include the following
acknowledgment (in addition to an acknowledgment of the investigator)
in any published use of these data: "Logistical support
and/or data were provided by the Niwot Ridge Long-Term Ecological
Research project (NSF DEB 0423662) and the Mountain Research Station
(BIR 9115097)." Please send 4 reprints or high-quality copies of any
such publications to Todd Ackerman, NWT LTER data manager,
INSTAAR, CB 450, University of Colorado, Boulder, CO, 80309-0450.
The data contained in these files have many sources. Generally,
data collected prior to 1993 would have been subjected to quality
control standards imposed by the investigator. Data after 1992
were likely to have been manually entered and/or processed in the
NWT LTER central data management laboratory. Detailed information
on the quality control protocols and programs associated with any
data routed through the NWT LTER data management laboratory will
be supplied upon request. The user of these data should be aware
that, while efforts have been taken to ensure that these data are
of the highest quality, there is no guarantee of perfection for
the data contained herein and the possibility of errors exists.
If you encounter questionable data, please contact the NWT LTER
data manager (todda@culter.colorado.edu; (303) 492-4771) so that
the data can be corrected or qualified. Thus, these data should
be considered dynamic in that past data may be modified and future
data will be appended.
******************************************************************}
\data
Dry,one,36.75,1.909,0.702,73.26,1.486,1.089,110.010,2.100,161.54,1.347,2.176,51.79,1.360,0.704,213.33,2.874
Dry,one,116.71,1.709,1.995,50.02,1.423,0.712,166.720,2.850,187.31,1.389,2.602,119.11,1.307,1.557,306.42,4.257
Dry,one,65.3,1.856,1.212,63.66,1.350,0.859,128.960,2.393,104.2,1.520,1.584,103.57,1.159,1.200,207.77,3.158
Dry,one,32.71,1.722,0.563,71.61,1.345,0.963,104.330,1.797,111.4,1.864,2.077,170.89,1.155,1.974,282.29,5.263
Moist,one,140.58,2.009,2.824,42.56,1.260,0.536,183.140,3.680,124.66,1.610,2.007,63.78,1.431,0.913,188.45,3.034
Moist,one,72.75,2.261,1.645,70.98,1.463,1.039,143.740,3.249,166.34,1.437,2.390,90.06,1.477,1.330,256.4,3.684
Moist,one,155.48,1.764,2.743,53.55,1.340,0.717,209.030,3.687,306.54,1.423,4.361,63.78,1.582,1.009,370.33,5.268
Moist,one,77.3,2.010,1.554,18.31,1.279,0.234,95.610,1.922,136.54,1.557,2.126,64.54,1.547,0.998,201.08,3.131
Wet,one,44.33,1.732,0.768,39.03,1.284,0.501,83.360,1.444,419.59,1.262,5.296,114.94,1.367,1.571,534.52,6.747
Wet,one,100.79,1.437,1.448,106.48,1.451,1.545,207.270,2.979,69.59,1.563,1.088,145.25,1.373,1.994,214.84,3.359
Wet,one,142.72,1.219,1.740,146.26,1.329,1.944,288.990,3.523,101.17,1.180,1.194,219.39,1.265,2.776,320.56,3.783
Wet,one,105.97,1.425,1.510,42.19,1.273,0.537,148.160,2.112,316.39,1.035,3.275,109.38,1.294,1.416,425.77,4.407
Dry,two,43.45,1.368,0.594,210.3,1.147,2.412,253.750,3.470,77.42,1.774,1.373,135.78,1.254,1.702,213.2,3.781
Dry,two,33.85,1.410,0.477,110.9,1.327,1.471,144.750,2.041,116.45,1.560,1.817,113.93,1.414,1.611,230.38,3.594
Dry,two,30.31,1.275,0.386,81.34,1.108,0.901,111.650,1.423,65.68,1.510,0.992,132.37,1.166,1.544,198.05,2.990
Dry,two,27.28,1.323,0.361,67.57,1.395,0.943,94.860,1.255,70.86,1.574,1.116,73.13,1.334,0.976,143.99,2.267
Moist,two,106.73,1.625,1.735,79.95,1.326,1.060,186.680,3.034,88.79,1.588,1.410,82.73,1.242,1.028,171.52,2.724
Moist,two,31.45,1.861,0.585,44.08,1.242,0.547,75.530,1.405,71.61,1.758,1.259,116.58,1.538,1.793,188.19,3.308
Moist,two,30.69,1.871,0.574,111.78,1.278,1.428,142.470,2.665,48.75,1.666,0.812,98.14,1.562,1.533,146.89,2.447
Moist,two,69.09,1.878,1.298,43.7,1.308,0.571,112.790,2.118,138.05,1.536,2.120,0,1.297,0.000,138.05,2.120
Wet,two,128.07,1.407,1.802,199.94,1.117,2.233,328.010,4.615,492.21,1.085,5.339,72.25,1.300,0.939,564.46,6.122
Wet,two,17.81,1.970,0.351,33.72,1.232,0.415,51.530,1.015,145.88,1.413,2.061,63.41,1.304,0.827,209.29,2.957
Wet,two,33.09,1.433,0.474,29.56,1.166,0.345,62.650,0.898,82.35,1.709,1.408,132.75,1.220,1.619,215.1,3.676
Wet,two,69.59,1.674,1.165,74.52,1.384,1.031,144.110,2.413,429.56,1.434,6.160,78.94,1.246,0.984,508.5,7.292
Dry,three,62.02,1.169,0.725,91.32,1.281,1.170,153.330,1.793,73.89,1.466,1.084,45.6,1.319,0.601,119.48,1.752
Dry,three,52.04,1.406,0.731,78.81,1.346,1.061,130.850,1.839,83.99,1.540,1.294,92.2,1.106,1.020,176.2,2.714
Dry,three,40.67,1.590,0.647,46.61,1.500,0.699,87.280,1.388,102.18,1.655,1.691,77.8,1.374,1.069,179.98,2.978
Dry,three,30.44,1.516,0.461,52.29,1.199,0.627,82.730,1.254,53.05,1.712,0.908,55.57,1.388,0.771,108.62,1.860
Moist,three,22.1,1.695,0.375,49.01,1.294,0.634,71.110,1.206,82.1,1.511,1.241,68.33,1.462,0.999,150.43,2.274
Moist,three,53.3,1.937,1.032,27.16,1.271,0.345,80.460,1.558,199.56,1.330,2.654,118.73,1.425,1.692,318.29,4.233
Moist,three,42.06,1.875,0.788,16.8,1.375,0.231,58.860,1.103,201.33,1.625,3.272,129.59,1.647,2.135,330.92,5.379
Moist,three,49.26,1.821,0.897,87.15,1.387,1.209,136.410,2.484,181.12,1.756,3.181,88.41,1.589,1.405,269.53,4.733
Wet,three,24.5,1.500,0.367,27.41,1.419,0.389,51.910,0.779,126.94,1.291,1.638,97.63,1.358,1.326,224.57,2.898
Wet,three,103.06,1.487,1.533,65.93,1.157,0.763,169.000,2.513,256.9,1.375,3.533,124.03,1.314,1.630,380.94,5.239
Wet,three,61.01,1.819,1.110,53.81,1.354,0.729,114.810,2.088,244.91,1.426,3.492,190.59,1.621,3.090,435.5,6.209
Wet,three,77.68,1.503,1.168,67.7,1.458,0.987,145.380,2.186,257.16,1.203,3.094,77.3,1.557,1.203,334.46,4.025