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TD018 – Simplified metadata

← Back to TD018 detail

Dataset

Database Code
TD018
Title
Nitrogen fixation and respiration potential of conifer logs at Andrews Experimental Forest, 1987 to 2006
Abstract
These data provide a time series of changes in nitrogen fixation rates, and respiration rates for four common PNW species. The purpose is to understand when these rates reach a maximum.
Keywords
water content; respiration rates; respiration; nitrogen fixation; inorganic nutrients; coarse woody debris; nitrogen; organic matter; terrestrial ecosystems; logs; Long-Term Ecological Research (LTER); moisture stress; inorganic nutrients; organic matter
Date begin
1987-03-01
Date end
2006-05-15
Principal Investigator
Mark E. Harmon

Entities

  1. TD01801
  2. TD01802
  3. TD01803
  4. TD01804

1. TD01801 - Attribute list

TD01801 - attributes
Attribute Type Domain Minimum Maximum Unit
DBCODE varchar enum
ENTITY numeric(1.000000) range 1.0000 1.0000 number
STUDYID varchar enum
YEAR datetime freetext
TIME numeric(1.000000) range 4.0000 248.0000 number
SITE varchar enum
SPECIES varchar enum
TISSUE varchar enum
POSITION varchar enum
NUMBER numeric(1.000000) range 1.0000 741.0000 number
REP varchar freetext
ETHYLENE numeric(0.001000) range -3.8800 75.9250 parts per million
ETIME numeric(1.000000) range 0.0000 29.0000 number of hours
PRODE numeric(0.001000) range -3.7090 129.7900 nanomoles per gram per day
CO2 numeric(0.001000) range -0.3600 3.3000 percent
TIMECO2 numeric(0.010000) range -0.0100 4.7500 number of hours
RESPIR numeric(0.000100) range -2.4400 9.7300 micromoles per gram per hour
DRYWT numeric(0.010000) range 0.1300 3.8300 grams
WETWT numeric(0.010000) range 0.9500 3.7600 grams
MC numeric(0.100000) range 6.5000 1488.0000 percent
OXYGEN numeric(1.000000) range 0.0000 2.0000 percent
SAMPLEDATE datetime freetext

2. TD01802 - Attribute list

TD01802 - attributes
Attribute Type Domain Minimum Maximum Unit
DBCODE varchar enum
ENTITY numeric(1.000000) range 2.0000 2.0000 number
STUDYID varchar enum
YEAR datetime freetext
TIME numeric(1.000000) range 0.0000 140.0000 number
SPECIES varchar enum
TISSUE varchar enum
MEANPRODE numeric(0.001000) range 0.0000 28.7100 nanomoles per gram per day
STDERRE numeric(0.001000) range 0.0000 20.2940 nanomoles per gram per day
NE numeric(1.000000) range 0.0000 24.0000 number
MEANRESP numeric(0.000100) range 0.0000 8.7240 micromoles per gram per hour
STERRR numeric(0.000100) range 0.0000 1.4245 micromoles per gram per hour
NRESP numeric(1.000000) range 3.0000 24.0000 number
MC numeric(0.100000) range 0.0000 575.6000 percent
STDERRMC numeric(0.100000) range 0.0000 230.0000 percent
NMC numeric(1.000000) range 0.0000 24.0000 number

3. TD01803 - Attribute list

TD01803 - attributes
Attribute Type Domain Minimum Maximum Unit
DBCODE varchar enum
ENTITY numeric(1.000000) range 3.0000 3.0000 number
STUDYID varchar enum
YEAR datetime freetext
TIME numeric(1.000000) range 0.0000 140.0000 number
SUB varchar enum
SPECIES varchar enum
SUBDEN numeric(0.001000) range 0.1480 0.5710 grams per cubic centimeter
LOGDEN numeric(0.001000) range 0.1920 0.4540 grams per cubic centimeter
SAMPLEDATE datetime freetext

4. TD01804 - Attribute list

TD01804 - attributes
Attribute Type Domain Minimum Maximum Unit
DBCODE varchar enum
ENTITY numeric(1.000000) range 4.0000 4.0000 number
STUDYID varchar enum
TIME numeric(1.000000) range 1.0000 140.0000 number
SPECIES varchar enum
SECTION varchar freetext
LOGETHYL numeric(0.001000) range 0.0000 8.9640 nanomoles per gram per day
LOGRESP numeric(0.010000) range 0.0000 2.8000 micrograms per gram per day
LOGMC numeric(0.100000) range 0.0000 438.0000 percent

Attribute definitions

CO2
CO2 increase over incubation
DBCODE
FSDB Database code
DRYWT
Dry weight
ENTITY
Entity number
ETHYLENE
Ethylene produced during incubation
ETIME
Length of the ethylene incubation
LOGDEN
Mean density of the log at sample time. used to calcualte the relative mass of a tissue type.
LOGETHYL
Weighted mean rate of ethylene production for entire log. tissue samples were weighted by relative mass (dry weight basis)
LOGMC
Weighted mean moisture content for logs. tissue values were weighted by relative mass.
LOGRESP
Weighted mean respiration potential at 15 deg C for entire logs. tissue samples were weighted by relative mass (dry weight basis)
MC
Moisture content of the samples
MEANPRODE
Mean production rate of ethylene on a gram dry weight per day basis
MEANRESP
Mean respiration rate (dry weight basis)
NE
Number of samples used to calculate the mean ethylene production
NMC
Number of samples used to calculate the moisture content
NRESP
Number of samples used to compute the rrespiration rate
NUMBER
Number of test tube used for incubation
OXYGEN
Oxygen at start of the ethylene incubation
POSITION
Position in cross-section sampled
PRODE
Production rate of ethylene on a gram dry weight per day basis
REP
Replicate for species and tissue type
RESPIR
Respiration rate at 15 deg C (dry weight basis)
SAMPLEDATE
Date of sample collection
SECTION
Cross-section of log the tissue samples were pooled from.
SITE
Site that the log samples were removed from; refers to sites described under TD14 studies
SPECIES
Species of the log sampled; follows garrison conventions
STDERRE
Standard error of ethylene production. note that all negative valuses weres et to 0 before calculation.
STDERRMC
Standard error of the moisture content
STERRR
Standard error of the respiration measurements (dry weight basis)
STUDYID
Location of the sample collection
SUB
Tissues of the log sampled. also called substrate.
SUBDEN
Mean density of tissue at sample time.
TIME
Time in months that the log has been rotting in the field.
TIMECO2
Length of the CO2 incubation
TISSUE
Tissue type of the log sampled
WETWT
Wet weight
YEAR
Year of sample collection

Enumerated domains

Enumerated domain for attribute: DBCODE

Codes for DBCODE
Code Description
TD018 FSDB database code TD018

Enumerated domain for attribute: STUDYID

Codes for STUDYID
Code Description
HJA Andrews Experimental Forest (HJA)

Enumerated domain for attribute: SITE

Codes for SITE
Code Description
1 End of 327 road
4 W of 350 road near junction of 350 and 1506

Enumerated domain for attribute: SPECIES

Codes for SPECIES
Code Description
ABAM Abies amabilis
PSME Pseudotsuga menziesii
THPL Thuja plicata
TSHE Tsuga heterophylla

Enumerated domain for attribute: TISSUE

Codes for TISSUE
Code Description
HW Heartwood
IB Inner bark
OB Outer bark
SW Sapwood

Enumerated domain for attribute: POSITION

Codes for POSITION
Code Description
T Top of log
S Side of log
B Bottom of log
M Mixed position; taken from any position randomly

Enumerated domain for attribute: SUB

Codes for SUB
Code Description
HW Hardwood
IB Inner bark
OB Outer bark
SW Softwood