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TD031 – Simplified metadata
Dataset
- Database Code
- TD031
- Title
- Decomposition of Fine Woody Roots: a Time Series Approach, 1995 to 2006
- Abstract
- We examined the effects of species, initial substrate quality, and site differences on woody root decomposition and its nitrogen dynamics in Sitka spruce (Picea sitchensis), Douglas-fir (Pseudotsuga menziesii), and ponderosa pine (Pinus ponderosa) dominated forests in Oregon, U.S.A. using a time series approach. Roots of fourteen species and five size classes were placed in the field to incubate and then collected at pre-planned intervals to determine mass loss and nitrogen content.
- Keywords
- decomposition; inorganic nutrients; nitrogen; organic matter; roots; fine roots; inorganic nutrients; organic matter
- Date begin
- 1995-06-01
- Date end
- 2006-06-01
- Principal Investigator
- Mark E. Harmon
Entities
- TD03101
1. TD03101 - Attribute list
| Attribute | Type | Domain | Minimum | Maximum | Unit |
|---|---|---|---|---|---|
| DBCODE | varchar | enum | |||
| ENTITY | numeric(1.000000) | range | 1.0000 | 1.0000 | number |
| SITE | varchar | enum | |||
| REP | numeric(1.000000) | range | 1.0000 | 4.0000 | number |
| TIME | numeric(1.000000) | range | 1.0000 | 6.0000 | number |
| TIMEOUT | numeric(0.250000) | range | 0.2500 | 2.0000 | number of years |
| SPECIES | varchar | enum | |||
| TYPE | varchar | enum | |||
| SAMP_NUM | numeric(1.000000) | range | 1.0000 | 10804.0000 | number |
| IODW | numeric(0.001000) | range | 0.0000 | 3549.5000 | grams |
| IASH | numeric(0.010000) | range | 0.0000 | 12.3200 | percent |
| IAFODW | numeric(0.010000) | range | 0.0000 | 3525.7200 | grams |
| INI_C | numeric(0.010000) | range | 44.7400 | 54.4000 | percent |
| INI_N | numeric(0.010000) | range | 0.1300 | 2.1900 | percent |
| INI_C_CONT | numeric(0.001000) | range | 0.0000 | 1805.5200 | grams |
| INI_N_CONT | numeric(0.001000) | range | 0.0000 | 7.1170 | grams |
| FWW | numeric(0.010000) | range | 6.7900 | 9091.2002 | grams |
| FOW | numeric(0.010000) | range | 2.1000 | 3516.0000 | grams |
| FASH | numeric(0.010000) | range | 0.0100 | 26.3000 | percent |
| FAFOW | numeric(0.001000) | range | 1.6170 | 3463.2600 | grams |
| MOISTURE | numeric(0.100000) | range | 2.5000 | 2439.0000 | percent |
| MASSLOSS | numeric(0.010000) | range | -9.0600 | 77.2200 | percent |
| CARBON | numeric(0.010000) | range | 38.7900 | 52.6300 | percent |
| CARBON_REM | numeric(0.010000) | range | 17.4600 | 106.0300 | percent |
| AF_N | numeric(0.010000) | range | 0.0300 | 2.6000 | percent |
| NITRO_REM | numeric(0.010000) | range | 10.4200 | 219.2300 | percent |
| C_N_RATIO | numeric(0.010000) | range | 18.1800 | 1728.7000 | number |
Attribute definitions
- AF_N
- Percent of sample composed of nitrogen after field incubation
- CARBON
- Percent of final sample composed of carbon after field incubation ((100-fash)/1.9)
- CARBON_REM
- Percent of initial carbon content (mass) remaining after field incubation ie. final carbon content/initial carbon content
- C_N_RATIO
- Ratio of carbon to nitrogen (c:n)
- DBCODE
- FSDB database code
- ENTITY
- Entity number
- FAFOW
- Final ash-free oven dry weight after field incubation
- FASH
- Percent of sample composed of ash after field incubation
- FOW
- Final oven dry weight of sample after field incubation
- FWW
- Final wet weight of sample after field incubation
- IAFODW
- Initial ash-free oven dry weight
- IASH
- Percent of initial sample composed of ash
- INI_C
- Percent of initial sample composed of carbon ((100-iash)/1.9)
- INI_C_CONT
- Carbon content of initial sample ashfree basis
- INI_N
- Percent of initial sample composed of nitrogen
- INI_N_CONT
- Nitrogen content of initial sample ashfree basis
- IODW
- Initial oven dry weight before field incubation
- MASSLOSS
- Percent of the mass of the sample that was lost during incubation
- MOISTURE
- Percent moisture of final sample after field incubation, can be over 100 moisture=100*((fww-fow)/fow) ie. water weight/dry weight * 100
- NITRO_REM
- Percent of initial nitrogen content (mass) remaining after field incubation ie. final nitrogen content/initial nitrogen content
- REP
- Replicate number
- SAMP_NUM
- Unique sample number, except for GOBA dowels that are differentiated by type
- SITE
- Site where samples were incubated
- SPECIES
- Root species code
- TIME
- The time the litter will be harvested (sequential collection number)
- TIMEOUT
- The amout of time that the root sample incubated in the field
- TYPE
- Diameter class of the root sample, position for the GOBA (dowel) sample
Enumerated domains
Enumerated domain for attribute: DBCODE
| Code | Description |
|---|---|
| TD031 | FSDB database code TD031 (Terrestrial: organic decomposition) |
Enumerated domain for attribute: SITE
| Code | Description |
|---|---|
| HJA | H.J. Andrews Experimental Forest Oregon |
| CAH | Cascade Head Experimental Forest |
| PRF | Pringle Falls Experimental Forest |
Enumerated domain for attribute: SPECIES
| Code | Description |
|---|---|
| ABCO | Abies concolor |
| ABMA | Abies magnifica |
| ABPR | Abies procera |
| ACMA | Acer macrophyllum |
| ALRU | Alnus rubra |
| CADE3 | Calocedrus decurrens |
| FRLA2 | Fraxinus latifolia |
| PIEN | Picea engelmannii |
| PICO | Pinus contorta |
| PIMO | Pinus monticola |
| PIPO | Pinus ponderosa |
| PSME | Pseudotsuga menziesii |
| PUTR | Purshia tridentata |
| RHMA | Rhododendron macrophyllum |
| THPL | Thuja plicata |
| TSHE | Tsuga heterophylla |
| CACH | Castanopsis chrysophylla |
| GOBA | Gonystylus bancanus |
| ACRU2 | Acer rubrum |
Enumerated domain for attribute: TYPE
| Code | Description |
|---|---|
| A | Aboveground dowel |
| B | Belowground dowel |
| F | Fine root size class <2mm |
| J | Jumbo root size class >100mm |
| L | Large root size class 50-100mm |
| M | Medium root size class 10-50mm |
| S | Small root size class 2-10mm |