# Seasonal relationships between soil respiration and water-extractable carbon as influenced by soil temperature and moisture in forest soils of the Andrews Experimental Forest, 1992-1993

## Dataset

- **Database Code:** SP004

- **Title:** Seasonal relationships between soil respiration and water-extractable carbon as influenced by soil temperature and moisture in forest soils of the Andrews Experimental Forest, 1992-1993

- **Abstract:**

The overall objective of this study is to model trace gas emissions from forest soils of the H. J. Andrews Experimental Forest. This is to be accomplished by studying trace gas emissions and related variable at a set of 20 permanent plots at the HJA.


- **Keywords:** meteorology; soil chemistry; microclimate; soil respiration; respiration; carbon cycling; inorganic nutrients; carbon; Long-Term Ecological Research (LTER); inorganic nutrients

- **Temporal coverage:** 1992-07-12 to 1993-07-07

- **Principal Investigator:** Robert P. Griffiths


## Data Entities

1. SP00401
2. SP00402
3. SP00403
4. SP00404
5. SP00405

## Entity 1: SP00401

### Attribute list

- **STCODE** — varchar, enum

Database code

  - **SP004** — FSDB Database Study Code


- **FORMAT** — numeric(1.000000), range  1.0000  1.0000, number

Entity number


- **SITE** — varchar, enum

Permanent trace gas sites

  - **10C** — Mid-elevation (south slope)
  - **11C** — Riparian area
  - **1C** — 1v control + high hot dry mc
  - **1V** — High hot dry microclimate (mc)
  - **2C** — North facing
  - **2V** — North facing clear cut (mid-elevation)
  - **2VC** — Control for 2v and 3v
  - **3C** — Valley site near stream (no slope)
  - **3V** — 15 year old doug-fir stand
  - **4C** — Cool-wet high elevation (north slope) control for 6v.
  - **4V** — 35 year old doug-fir stand
  - **4VC** — Control for 4v
  - **5C** — Site similar to 3c but higher
  - **5V** — Big-leaf maple site
  - **5VC** — Control for 5v
  - **6C** — High-moisture site (north facing)
  - **6V** — Sitka alder veg. site
  - **7C** — Moisture mid-elevation (north facing veg. site)
  - **8C** — High dry hot site (south facing ridge top)
  - **9C** — Low elevation (north slope) cool moisture


- **DATE** — datetime, freetext

Date samples collected (yyyymmdd)


- **SAMPLOCA** — varchar, freetext

Location along transect where sample is taken


- **PH** — numeric(0.010000), range  3.6000  5.9400, pH units

pH


- **P_MOIST** — numeric(0.100000), range  17.6000  200.3000, percent

Percent moisture (wet-dry/dry)x100


- **F_DRY_WT** — numeric(0.001000), range  0.3330  0.8500, number

Wt fraction dry/wet wt soil


- **SOM** — numeric(0.100000), range  7.4000  89.3000, percent

Percent soil organic matter in mineral soil (by combustion at 550 C)


- **EXTR_AMM** — numeric(0.001000), range  0.0000  4.9650, micrograms per gram

Concentration of ammonium n extracted with 2m KCl


- **MIN_N** — numeric(0.010000), range  2.5000  147.8200, micrograms per gram

Concentration ammonium n after incubation at 40 deg. C for 7 days


- **DOC_SOIL** — numeric(0.100000), range  0.3000  787.2000, micrograms per gram

Dissolved organic carbon extracted from soils (as C)


- **LAB_RESP** — numeric(0.001000), range  0.0030  1.8530, micromoles per gram per hour

CO2 released from soils incubated at 15 deg. C


- **N2OCONS** — numeric(0.001000), range  -0.4380  3.5800, nanomoles per gram per day

Nitrous oxide consumed by soils


- **METHCONS** — numeric(0.010000), range  -0.0600  7.3600, nanomoles per gram per hour

Methane consumption rates from soils


- **DENITPOT** — numeric(0.001000), range  0.0300  127.2900, nanomoles per gram per hour

Denitrification potential


- **METHPROD** — numeric(0.010000), range  0.1200  5.0500, nanomoles per gram per hour

Methane production


- **FLD_RESP** — numeric(0.010000), range  0.0900  3.3500, grams per square meter per day

Forest floor respiration (g CO2)


- **LIT_RESP** — numeric(0.010000), range  0.0000  2.1800, grams per square meter per day

Litter respiration (g CO2)


- **LIT_RESP_P** — numeric(0.010000), range  0.0000  140.0600, percent

Percent litter respiration


- **BULKDENS** — numeric(0.010000), range  0.0800  1.0200, grams per cubic centimeter

Bulk density of soil


- **MASS_LIT** — numeric(0.010000), range  0.6600  25.8000, kilograms per square meter

Mass of litter on a square meter basis


- **AIRTEMP** — numeric(0.100000), range  5.5000  31.0000, degrees Celsius

Mean of air temperatures taken at the start and end of field respiration


- **SOILTEMP** — numeric(0.100000), range  8.5000  19.5000, degrees Celsius

Mean of soil temperatures taken at the start and end of field respiration


## Entity 2: SP00402

### Attribute list

- **STCODE** — varchar, enum

Database code

  - **SP004** — FSDB Database Study Code


- **FORMAT** — numeric(1.000000), range  2.0000  2.0000, number

Entity number


- **SITE** — varchar, enum

Permanent trace gas sites

  - **10C** — Mid-elevation (south slope)
  - **11C** — Riparian area
  - **1C** — 1v control + high hot dry mc
  - **1V** — High hot dry microclimate (mc)
  - **2C** — North facing
  - **2V** — North facing clear cut (mid-elevation)
  - **2VC** — Control for 2v and 3v
  - **3C** — Valley site near stream (no slope)
  - **3V** — 15 year old doug-fir stand
  - **4C** — Cool-wet high elevation (north slope) control for 6v.
  - **4V** — 35 year old doug-fir stand
  - **4VC** — Control for 4v
  - **5C** — Site similar to 3c but higher
  - **5V** — Big-leaf maple site
  - **5VC** — Control for 5v
  - **6C** — High-moisture site (north facing)
  - **6V** — Sitka alder veg. site
  - **7C** — Moisture mid-elevation (north facing veg. site)
  - **8C** — High dry hot site (south facing ridge top)
  - **9C** — Low elevation (north slope) cool moisture


- **DATE** — datetime, freetext

Date samples collected (yyyymmdd)


- **SAMPLOCA** — varchar, freetext

Location along transect where sample is taken


- **P_MOIST** — numeric(0.100000), range  3.5000  408.8000, percent

Percent moisture (wet-dry/dry)x100


- **F_DRY_WT** — numeric(0.001000), range  0.3150  0.9660, number

Wt fraction dry/wet wt soil


- **SOM** — numeric(0.100000), range  0.0000  89.4000, percent

Percent soil organic matter in mineral soil (by combustion at 550 C)


- **DOC_SOIL** — numeric(0.100000), range  -3.0000  4053.0000, micrograms per gram

Dissolved organic carbon extracted from soils (as C)


- **LAB_RESP** — numeric(0.001000), range  -0.2600  4.5560, micromoles per gram per hour

CO2 released from soils incubated at 15 deg. C


- **AIRTEMP** — numeric(0.100000), range  -0.7000  31.8000, degrees Celsius

Mean of air temperatures taken at the start and end of field respiration


- **SOILTEMP** — numeric(0.100000), range  -0.2000  19.8000, degrees Celsius

Mean of soil temperatures taken at the start and end of field respiration


## Entity 3: SP00403

### Attribute list

- **STCODE** — varchar, enum

Database code

  - **SP004** — FSDB Database Study Code


- **FORMAT** — numeric(1.000000), range  3.0000  3.0000, number

Entity number


- **SITE** — varchar, enum

Permanent trace gas sites

  - **10C** — Mid-elevation (south slope)
  - **11C** — Riparian area
  - **1C** — 1v control + high hot dry mc
  - **1V** — High hot dry microclimate (mc)
  - **2C** — North facing
  - **2V** — North facing clear cut (mid-elevation)
  - **2VC** — Control for 2v and 3v
  - **3C** — Valley site near stream (no slope)
  - **3V** — 15 year old doug-fir stand
  - **4C** — Cool-wet high elevation (north slope) control for 6v.
  - **4V** — 35 year old doug-fir stand
  - **4VC** — Control for 4v
  - **5C** — Site similar to 3c but higher
  - **5V** — Big-leaf maple site
  - **5VC** — Control for 5v
  - **6C** — High-moisture site (north facing)
  - **6V** — Sitka alder veg. site
  - **7C** — Moisture mid-elevation (north facing veg. site)
  - **8C** — High dry hot site (south facing ridge top)
  - **9C** — Low elevation (north slope) cool moisture


- **RESPDATETIME** — datetime, freetext

Date and time respiration started


- **SAMPLE** — varchar, freetext

Sample location number along transect at each site


- **TREATMNT** — varchar, enum

Treatment code: N=no treatment P=mineral soil respiration eliminated by plastic sheet between mineral soil and litter

  - **N** — Total respiration from soil and litter: no treatment
  - **P** — Respiration from litter only


- **NET_RESP** — numeric(0.010000), range  -0.9700  18.4400, grams per square meter per day

Net respiration rate (as C)


## Entity 4: SP00404

### Attribute list

- **STCODE** — varchar, enum

Database code

  - **SP004** — FSDB Database Study Code


- **FORMAT** — numeric(1.000000), range  4.0000  4.0000, number

Entity number


- **SITE** — varchar, enum

Permanent trace gas sites

  - **10C** — Mid-elevation (south slope)
  - **11C** — Riparian area
  - **1C** — 1v control + high hot dry mc
  - **1V** — High hot dry microclimate (mc)
  - **2C** — North facing
  - **2V** — North facing clear cut (mid-elevation)
  - **2VC** — Control for 2v and 3v
  - **3C** — Valley site near stream (no slope)
  - **3V** — 15 year old doug-fir stand
  - **4C** — Cool-wet high elevation (north slope) control for 6v.
  - **4V** — 35 year old doug-fir stand
  - **4VC** — Control for 4v
  - **5C** — Site similar to 3c but higher
  - **5V** — Big-leaf maple site
  - **5VC** — Control for 5v
  - **6C** — High-moisture site (north facing)
  - **6V** — Sitka alder veg. site
  - **7C** — Moisture mid-elevation (north facing veg. site)
  - **8C** — High dry hot site (south facing ridge top)
  - **9C** — Low elevation (north slope) cool moisture


- **DATE** — datetime, freetext

Date samples collected (yyyymmdd)


- **AIRTEMP** — numeric(0.100000), range  -0.7000  32.5000, degrees Celsius

Mean of air temperatures taken at the start and end of field respiration


- **SOILTEMP** — numeric(0.100000), range  -0.2000  26.0000, degrees Celsius

Mean of soil temperatures taken at the start and end of field respiration


- **AIRMAX** — numeric(0.100000), range  0.6000  36.7000, degrees Celsius

Maximum air temperature during field respiration


- **AIRMIN** — numeric(0.100000), range  -1.1000  17.2000, degrees Celsius

Minimum air temperature during field respiration


## Entity 5: SP00405

### Attribute list

- **STCODE** — varchar, enum

Database code

  - **SP004** — FSDB Database Study Code


- **FORMAT** — numeric(1.000000), range  5.0000  5.0000, number

Entity number


- **SITE** — varchar, enum

Permanent trace gas sites

  - **10C** — Mid-elevation (south slope)
  - **11C** — Riparian area
  - **1C** — 1v control + high hot dry mc
  - **1V** — High hot dry microclimate (mc)
  - **2C** — North facing
  - **2V** — North facing clear cut (mid-elevation)
  - **2VC** — Control for 2v and 3v
  - **3C** — Valley site near stream (no slope)
  - **3V** — 15 year old doug-fir stand
  - **4C** — Cool-wet high elevation (north slope) control for 6v.
  - **4V** — 35 year old doug-fir stand
  - **4VC** — Control for 4v
  - **5C** — Site similar to 3c but higher
  - **5V** — Big-leaf maple site
  - **5VC** — Control for 5v
  - **6C** — High-moisture site (north facing)
  - **6V** — Sitka alder veg. site
  - **7C** — Moisture mid-elevation (north facing veg. site)
  - **8C** — High dry hot site (south facing ridge top)
  - **9C** — Low elevation (north slope) cool moisture


- **CONTROL** — varchar, freetext

Control site for given site code - if any


- **ASPECT** — varchar, enum

Aspect description

  - **High flat** — High flat
  - **North** — North
  - **North-flat** — North-flat
  - **South** — South
  - **South-flat** — South-flat


- **MAP_ELEV** — numeric(1.000000), range  473.0000  1433.0000, meters

Site elevation from gis map


- **LATITUDE** — numeric(1.000000), range  44.2000  44.2800, degrees latitude or longitude

Site latitude decimal degrees


- **LONGITUDE** — numeric(1.000000), range  -122.2400  -122.1200, degrees latitude or longitude

Site longitude decimal degrees


- **VEG** — varchar, enum

Primary tree vegetation

  - **BL maple** — Broad-leaf maple
  - **Clearcut** — Clearcut
  - **Douglas-fir** — Douglas-fir
  - **Noble fir** — Noble fir
  - **Sitka alder** — Sitka alder


- **STANDAGE** — varchar, enum

Standage description, OG=old-growth, CC=clearcut, or age in years

  - **YS** — young stand
  - **MS** — mature stand
  - **OG** — old growth
  - **CC** — Clearcut


- **COMMENTS** — varchar, freetext

Site description and comments


## Attribute Definitions

**AIRMAX**

Maximum air temperature during field respiration


**AIRMIN**

Minimum air temperature during field respiration


**AIRTEMP**

Mean of air temperatures taken at the start and end of field respiration


**ASPECT**

Aspect description


**BULKDENS**

Bulk density of soil


**COMMENTS**

Site description and comments


**CONTROL**

Control site for given site code - if any


**DATE**

Date samples collected (yyyymmdd)


**DENITPOT**

Denitrification potential


**DOC_SOIL**

Dissolved organic carbon extracted from soils (as C)


**EXTR_AMM**

Concentration of ammonium n extracted with 2m KCl


**FLD_RESP**

Forest floor respiration (g CO2)


**FORMAT**

Entity number


**F_DRY_WT**

Wt fraction dry/wet wt soil


**LAB_RESP**

CO2 released from soils incubated at 15 deg. C


**LATITUDE**

Site latitude decimal degrees


**LIT_RESP**

Litter respiration (g CO2)


**LIT_RESP_P**

Percent litter respiration


**LONGITUDE**

Site longitude decimal degrees


**MAP_ELEV**

Site elevation from gis map


**MASS_LIT**

Mass of litter on a square meter basis


**METHCONS**

Methane consumption rates from soils


**METHPROD**

Methane production


**MIN_N**

Concentration ammonium n after incubation at 40 deg. C for 7 days


**N2OCONS**

Nitrous oxide consumed by soils


**NET_RESP**

Net respiration rate (as C)


**PH**

pH


**P_MOIST**

Percent moisture (wet-dry/dry)x100


**RESPDATETIME**

Date and time respiration started


**SAMPLE**

Sample location number along transect at each site


**SAMPLOCA**

Location along transect where sample is taken


**SITE**

Permanent trace gas sites


**SOILTEMP**

Mean of soil temperatures taken at the start and end of field respiration


**SOM**

Percent soil organic matter in mineral soil (by combustion at 550 C)


**STANDAGE**

Standage description, OG=old-growth, CC=clearcut, or age in years


**STCODE**

Database code


**TREATMNT**

Treatment code: N=no treatment P=mineral soil respiration eliminated by plastic sheet between mineral soil and litter


**VEG**

Primary tree vegetation


## Enumerated Domains

### STCODE

- **SP004** — FSDB Database Study Code

### SITE

- **10C** — Mid-elevation (south slope)

- **11C** — Riparian area

- **1C** — 1v control + high hot dry mc

- **1V** — High hot dry microclimate (mc)

- **2C** — North facing

- **2V** — North facing clear cut (mid-elevation)

- **2VC** — Control for 2v and 3v

- **3C** — Valley site near stream (no slope)

- **3V** — 15 year old doug-fir stand

- **4C** — Cool-wet high elevation (north slope) control for 6v.

- **4V** — 35 year old doug-fir stand

- **4VC** — Control for 4v

- **5C** — Site similar to 3c but higher

- **5V** — Big-leaf maple site

- **5VC** — Control for 5v

- **6C** — High-moisture site (north facing)

- **6V** — Sitka alder veg. site

- **7C** — Moisture mid-elevation (north facing veg. site)

- **8C** — High dry hot site (south facing ridge top)

- **9C** — Low elevation (north slope) cool moisture

### TREATMNT

- **N** — Total respiration from soil and litter: no treatment

- **P** — Respiration from litter only

### ASPECT

- **High flat** — High flat

- **North** — North

- **North-flat** — North-flat

- **South** — South

- **South-flat** — South-flat

### VEG

- **BL maple** — Broad-leaf maple

- **Clearcut** — Clearcut

- **Douglas-fir** — Douglas-fir

- **Noble fir** — Noble fir

- **Sitka alder** — Sitka alder

### STANDAGE

- **YS** — young stand

- **MS** — mature stand

- **OG** — old growth

- **CC** — Clearcut