Long-term Carbon and Nitrogen, and Phosphorus Dynamics of Leaf and Fine Root Litter project (LIDET-Long-term Intersite Decomposition Experiment Team) data for the ARC, Arctic LTER. 1990 to 2000.

Abstract: 

This file is from the Long-term Carbon and Nitrogen, and Phosphorus Dynamics of Leaf and Fine Root Litter project (LIDET-Long-term Intersite Decomposition Experiment Team). This file contains only the Arctic LTER data. In particular the mass looses over the ten year study. Three types of fine roots (graminoid, hardwood, and conifer), six types of leaf litter (which ranged in lignin/nitrogen ratio from 5 to 75), and wooden dowels were used for litter incubations over a ten year period.

Project Keywords: 

Data set ID: 

1409

EML revision ID: 

11

Short name: 

1990_2000ArcLIDETMass
People

Keywords: 

Arctic LTER keywords: 

Dates

Date Range: 

Thursday, August 23, 1990 to Tuesday, August 22, 2000

Publication Date: 

Thursday, December 12, 2002

Methods: 

Litter Collection
Each site was responsible for collecting the litter used in the experiments. For most sites, the leaf litter was collected directly from senesecent plants or as freshly fallen litter. Green leaves were collected from the Jornada, San Diego, Luquillo, and LaSelva sites. All leaf litter except, Drypetes glauca which was oven dried at 40 C to prevent decay, was air dried prior to shipment to Oregon State University.
Fine roots (<2 mm diameter) were collected by two methods: tropical hardwood (Drypetes glauca) and pine (Pinus elliotii) fine roots were collected by excavating surface roots and washing. Graminoid roots were collected from material exposed along stream banks. Graminoid and pine roots were air dried, whereas the tropical hardwood roots were oven dried at 40 C to prevent decomposition.
In the case of the LaSelva site, the litter was sterilized after the bags were filled to kill all invertebrates, fungi, and virus prior to shipment. Sterilization was conducted at the Battelle National Laboratory by exposing the litter to 20 hours of gamma rays with 60Co as the source. The total exposure was 2 Mrad.

Bag Design
All bags were 20- by 20-cm and filled with 10 g leaves and 5-7 g of fine roots. Each bag was identified with a unique number embossed on an aluminum tag. The bag openings were sealed with six monel staples. The initial air dry weight, calculated oven dry weight, species, site, replicate number for each litterbag were recorded prior to placement in the field. Subsamples of litter material were taken to determine the air dry to oven dry conversion factor and the initial chemistry of the litter. Moisture content of the air dried litter ranged from 2-10% moisture content.
Three types of bags were used in this experiment. For the long-term leaf litter experiment the bags had a top mesh of 1 mm and a bottom of 55 micron mesh. The bags used for fine roots were entirely of 55 micron mesh. The bags used in the mesh size effects study had a top of 7 mm mesh and a bottom of 55 micron mesh.

Dowels
The wooden dowels used in the experiment are made of ramin (Gonystlylus bancannus). This species is a tropical hardwood from southeast Asia. It is not resistant to decay and rated as perishable. The dowels are 13 mm in diameter and 61 cm in length. One half of the dowel is to be embedded vertically into the soil and the other half is to be exposed to aerial conditions. The air dry weight of each dowel was recorded, and a subsample of dowels was measured for diameter, density, air dry moisture content, nitrogen content, and carbon chemistry.

Sample Placement
Samples were placed in the field during fall of 1990 by each of the participating sites. Locations were near climatic stations and in areas protected from disturbances that could destroy the litter bags. The locations were also selected to be typical of areas that other intersite decomposition experiments might be conducted.

The exact method for placement varied from site to site, but the following standards were applied:
1) Four separate locations were selected to avoid pseudo- replication problems.
2) Each set of bags to be collected was connected by a cord; these sets of bags should be laid out in parallel lines in a random order.
3) Leaf litterbags should be placed so that contact with the underlying litter layer is made. Fine root litterbags will be inserted into the upper mineral soil (humus layer for histosols). A vertical cut with a shovel, the bag inserted the correct depth (0-20 cm), and another cut should be used to press the soil against the bag (Figure 3).
4) Dowels should be installed at the end of the string opposite the fine root bags. The dowels were placed so that 30 cm is exposed to the air and 30 cm is embedded in the soil.

Sample Processing
Once the litter or dowels are collected they should be oven dried in a paper bags at 55oC until the mass is stable. In the case of fine roots and dowels, a rinse with distilled water to remove adhering soil prior to drying is recommended. Any mosses, lichens, fine roots, or other plant parts that have grown into the bags or dowels should also be removed prior to harvesting. Samples will be pooled by species, site, and time for grinding and archiving. A subset of unpooled samples will also be saved to determine the internal variability of pooled samples. Chemical analyses will be performed using two methods. Each pooled sample from each species, site, and time will be analyzed for total nitrogen, lignin, and cellulose using near infrared reflectance spectoscopy (Wessman et al. 1988). Internal variability of samples will be estimated by running replicates of high and low lignin species. Twenty five percent of the pooled samples will also be sampled for Kjeldahl nitrogen, lignin, cellulose, water extractive, non- polar extractive, and ash content using wet chemical methods. Wet chemical methods will then be used to calibrate the near infrared reflectance spectoscopy methods.

Variable: SPECIES

ACSA ACER SACCHARUM, SUGAR MAPLE
ANGE SCHIZACHYRIUM GERARDI, BIG BLUE STEM
BOER BOUTLOUA ERIOPODA, BLACK GRAMMA
BOGR BOUTLOUA GRACILIS, BLUE GRAMMA
DRGL DRYPETES GLAUCA
FAGR FAGUS GRANDIFOLIA, BEECH
GOBA GONYSTYLUS BANCANUS, RAMIN
LATR LARREA TRIDENTATA, CREOSOTE BUSH
PIEL PINUS ELLIOTII, SLASH PINE
PIRE PINUS RESINOSA, RED PINE
PIST PINUS STROBUS, EASTERN WHITE PINE
PSME PSEUDOTSUGA MENZIESII, DOUGLAS-FIR
QUPR QUERCUS PRINUS, CHESTNUT OAK
RHMA RHODODENDRON MACROPHYLLUM, PACIFIC RHODODENDRON
SPAL SPARTINA ALTERNIFOLIA, SALT WATER CORDGRASS
THPL THUJA PLICATA, WESTERN RED CEDAR
TRAE TRITICUM AESTIVUM, WHEAT

Variable: TYPE
A ABOVE PART OF WOODEN DOWELS
B BELOW PART OF WOODEN DOWELS
L LEAVES
M MNERAL SOIL
R FINE ROOTS
W WOODEN DOWELS

Variable: REP
1 INDICATES REPLICATE 1
2 INDICATES REPLICATE 2
3 INDICATES REPLICATE 3
4 INDICATES REPLICATE 4
P INDICATES POOLED SAMPLE
I INDICATES INITIAL SAMPLE OF ORIGINAL MATERIAL

Variable: EST
E INDICATES A POOLED SAMPLE WAS USED TO ESTIMATE THE
ASHFREE PROPORTION.
BLANK INDICATES ACTUAL SAMPLE WAS ASHED
? INDICATES QUESTIONAL SAMPLE, MAY HAVE BEEN LOST
P INDICATES POOLED SAMPLE

Variable: NIR_EST
E INDICATES A POOLED SAMPLE WAS USED TO ESTIMATE AN ASH
FREE PORTION
BLANK INDICATES ACTUAL SAMPLE WAS ASHED

Variable: COMMENT
X BAG TORN WITH OBVIOUS SAMPLE LOSS
T BAG TORN WITH SAMPLE LOSS UNKNOWN
U TAG DISCONNECTED; ID QUESTIONABLE
F FOREIGN MATERIAL IN SAMPLE (I.E. ROCKS)
M SAMPLE MISSING
D TAG DISCONNECTED; ID GOOD
XF TORN BAG WITH SAMPLE LOSS AND FOREIGN MATERIAL
TF TORN BAG SAMPLE LOSS UNKNOWN AND FOREIGN MATERIAL
TU TORN BAG AND TAG DISCONNECTED
TD TORN BAG LOSS UNKNOWN; ID GOOD
TFU TORN BAG WITH FOREIGN MATERIAL TAG DISCONNECTED; ID
QUESTIONABLE
TX TORN BAG WITH OBVIOUS SAMPLE LOSS
UF TAG DISCONNECTED; ID QUESTIONABLE PLUS FOREIGN MATERIAL
UT TAG DISCONNECTED; ID QUESTIONABLE AND TORN BAG
UX TAG DISCONNECTED; ID QUESTIONABLE AND TORN BAG WITH
OBVIOUS SAMPLE LOSS
XFU TORN BAG WITH SAMPLE LOSS AND FOREIGN MATERIAL PLUS
TAG DISCONNECTED

Notes: Only the Arctic LTER data is presented here. See http://www.fsl.orst.edu/lter/research/intersite/lidet.htm for all the data. This is the format 9 file.

Reference Citations: Melillo. 1988. Foliar analysis using near infrared reflectance spectroscopy. Can. J. For. Res. 18:6-11

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.

Variables Details

(Variables names are in the first line/row of the CSV file and Excel data sheet.)
StCode
  • Label: StCode
  • Definition: THIS DATA IS FOR THE LIDET INTERSITE DECOMPOSITION EXPERIMENT
  • Type: Nominal
  • Missing values: None specified
Format
  • Label: Format
  • Definition: THIS DATA IS THE INITIAL AND FINAL MASS DATA
  • Type: Nominal
  • Missing values: None specified
Site
  • Label: Site
  • Definition: THE SITE WHERE THE LITTER WAS INCUBATED
  • Type: Nominal
  • Missing values: None specified
Rep
  • Label: Rep
  • Definition: REPLICATE IN FIELD, 1-4; P FOR POOLED; I FOR INITIAL SAMPLE
  • Type: Nominal
  • Missing values: None specified
Time
  • Label: Time
  • Definition: THE TIME THE LITTER WILL BE HARVESTED.
  • Type: Nominal
  • Missing values: None specified
Species
  • Label: Species
  • Definition: THE SPECIES OF THE LITTER
  • Type: Nominal
  • Missing values: None specified
Type
  • Label: Type
  • Definition: THE SUBSTRATE OF LITTER (E.G., LEAVES, ROOTS, WOOD)
  • Type: Nominal
  • Missing values: None specified
NIR_NUM
  • Label: NIR_NUM
  • Definition: UNIQUE SAMPLE NUMBER
  • Type: Nominal
  • Missing values: None specified
Mesh
  • Label: Mesh
  • Definition: THE MESH SIZE OF THE BAG. FOR LEAVES THIS CORRESPONDS TO THE TOP SIDE OF THE BAG; ALL THE BOTTOMS WERE 0.1 MM FOR LEAVES.
  • Type: Nominal
  • Missing values: None specified
DateOut
  • Label: DateOut
  • Definition: THE DATE THE BAGS WERE PLACED OUT IN THE FIELD.
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values:
    • #N/A = Missing or Not Measured
IADW
  • Label: IADW
  • Definition: THE INITIAL AIR DRY WEIGHT OF THE CONTENTS OF THE LITTERBAG, OR THE WOODEN DOWEL
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
IODW
  • Label: IODW
  • Definition: THE INITIAL OVEN DRY WEIGHT OF THE CONTENTS OF THE LITTERBAG, OR THE WOODEN DOWEL
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
DateIn
  • Label: DateIn
  • Definition: THE DATE THE LITTER BAG WAS HARVESTED FROM THE FIELD.
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values:
    • #N/A = Missing or Not Measured
FWW
  • Label: FWW
  • Definition: THE FINAL WET WEIGHT OF THE LITTER BAG CONTENTS.
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
FOW
  • Label: FOW
  • Definition: THE FINAL OVEN DRY WEIGHT (55c) OF THE LITTER BAG CONTENTS.
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
Length
  • Label: Length
  • Definition: THE LENGTH OF WOODEN DOWELS, THE SUM OF ABOVE AND BELOW LENGTH SHOULD BE 61.0 CM
  • Type: Physical quantity
  • Unit: centimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
IADW1
  • Label: IADW1
  • Definition: WOODEN DOWEL VARIABLE, INITIAL AIR DRY WEIGHT FOR ABOVE OR BELOW PART OF DOWEL (APPLIES ONLY TO TYPE 'A' OR 'B')
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
IODW1
  • Label: IODW1
  • Definition: WOODEN DOWEL VARIABLE, INITIAL OVEN DRY WEIGHT FOR ABOVE OR BELOW PART OF DOWEL (APPLIES ONLY TO TYPE 'A' OR 'B')
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
IASH
  • Label: IASH
  • Definition: PERCENT INITIAL ASH CONTENT
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
FASH
  • Label: FASH
  • Definition: PERCENT FINAL ASH CONTENT
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
IAFW
  • Label: IAFW
  • Definition: INITIAL ASH FREE WEIGHT (IOW*IASH)
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
FAFW
  • Label: FAFW
  • Definition: FINAL ASH FREE WEIGHT (FOW*FASH)
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
PRM
  • Label: PRM
  • Definition: PERCENT REMAINING MASS
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
PAFRM
  • Label: PAFRM
  • Definition: PERCENT ASH FREE REMAINING MASS
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
KDW
  • Label: KDW
  • Definition: DECAY RATE DRY WEIGHT BASIS IOW/FOW
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
KAFW
  • Label: KAFW
  • Definition: DECAY RATE ASH FREE WEIGHT BASIS FAFW/IAFW
  • Type: Physical quantity
  • Unit: dimensionless
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
Type1
  • Label: Type1
  • Definition: INDICATED SUBSTRATE (W FOR DOWEL, INSTEAD OF 'A' OR 'B')
  • Type: Nominal
  • Missing values: None specified
TimeOut
  • Label: TimeOut
  • Definition: TIME IN YEARS THAT LITTER SAMPLE INCUBATED IN FIELD
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • #N/A = Missing or Not Measured
Comment
  • Label: Comment
  • Definition: COMMENT FROM FIELD SHEETS
  • Type: Nominal
  • Missing values: None specified
Flag
  • Label: Flag
  • Definition: FLAGGED AS UNUSUAL OUTLIER
  • Type: Nominal
  • Missing values: None specified