# Seasonal soil respiration using permanent gas chambers in the Andrews Experimental Forest, 1994-1996 ## Dataset - **Database Code:** SP014 - **Title:** Seasonal soil respiration using permanent gas chambers in the Andrews Experimental Forest, 1994-1996 - **Abstract:** The overall objective of this study is to model CO emissions from forest soils of the H. J. Andrews Experimental Forest. The data to develop this model was obtained by measuring forest floor respiration rates in permanent chambers located along transects at permanent gas flux study sites. - **Keywords:** meteorology; soil respiration; respiration; inorganic nutrients; organic matter; forest floor; old growth forests; Long-Term Ecological Research (LTER); inorganic nutrients; organic matter - **Temporal coverage:** 1994-11-01 to 1996-11-01 - **Principal Investigator:** Robert P. Griffiths ## Data Entities 1. SP01401 ## Entity 1: SP01401 ### Attribute list - **DBCODE** — varchar, enum FSDB Database code - **SP014** — FSDB Database Code SP014 - **ENTITY** — numeric(1.000000), range 1.0000 1.0000, number Entity number - **SITE** — varchar, enum Permanent trace gas sites - **10C** — Mid-elevation (south slope) - **10V** — Low-elevation clear-cut; succession study site - **11C** — Riparian area - **11V** — Mid-elevation young stand - **12C** — Mid-elevation clear-cut - **12VC** — Mid-elevation old-growth control for 11v, 12c - **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) - **7V** — Mid-elevation, north slope, young stand - **8C** — High dry hot site (south facing ridge top) - **8V** — Low-elevation young stand at hq site (same as site ys) - **9C** — Low elevation (north slope) cool moisture - **9V** — Low-elevation clear-cut at hq site (same as site cc) - **9VC** — Low-elevation old-growth at hq site (same as site og) - **CC** — Clear-cut at hja headquarters site (same as site 9v) - **OG** — Old-growth at hja headquarters site (same as site 9vc) - **YS** — Young stand at hja headquarters site (same as site (8v) - **DATE** — datetime, freetext Date sample was colleted - **SAMPLE** — varchar, freetext Location along transect where sample was taken - **RESP** — numeric(0.001000), range -36.7400 127.6100, grams per square meter per day Respiration rate-control (grams of C per square meter per day) - **SOILTEMP** — numeric(0.100000), range 0.1000 25.3000, degrees Celsius Mean of instantaneous soil temperatures taken at the start and end of field - **P_MOIST** — numeric(0.010000), range 11.0000 264.6000, percent Percent moisture (wet-dry/dry)x100 - **H2OVOLUM** — numeric(0.001000), range 0.0510 1.3270, milliliters per cubic centimeter Volume of water per volume of sample - **BULKDENS** — numeric(0.001000), range 0.1270 1.0330, grams per cubic centimeter Bulk density of soils at site-cores taken next to each incubatoin chamber - **MOISOURC** — varchar, enum Method of measureing water volume in soils - **** — No method used to measure water volume - **1** — Water volume measured gravimetrically - **2** — Water volume measured with a time domain refractometer (tdr) ## Attribute Definitions **BULKDENS** Bulk density of soils at site-cores taken next to each incubatoin chamber **DATE** Date sample was colleted **DBCODE** FSDB Database code **ENTITY** Entity number **H2OVOLUM** Volume of water per volume of sample **MOISOURC** Method of measureing water volume in soils **P_MOIST** Percent moisture (wet-dry/dry)x100 **RESP** Respiration rate-control (grams of C per square meter per day) **SAMPLE** Location along transect where sample was taken **SITE** Permanent trace gas sites **SOILTEMP** Mean of instantaneous soil temperatures taken at the start and end of field ## Enumerated Domains ### DBCODE - **SP014** — FSDB Database Code SP014 ### SITE - **10C** — Mid-elevation (south slope) - **10V** — Low-elevation clear-cut; succession study site - **11C** — Riparian area - **11V** — Mid-elevation young stand - **12C** — Mid-elevation clear-cut - **12VC** — Mid-elevation old-growth control for 11v, 12c - **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) - **7V** — Mid-elevation, north slope, young stand - **8C** — High dry hot site (south facing ridge top) - **8V** — Low-elevation young stand at hq site (same as site ys) - **9C** — Low elevation (north slope) cool moisture - **9V** — Low-elevation clear-cut at hq site (same as site cc) - **9VC** — Low-elevation old-growth at hq site (same as site og) - **CC** — Clear-cut at hja headquarters site (same as site 9v) - **OG** — Old-growth at hja headquarters site (same as site 9vc) - **YS** — Young stand at hja headquarters site (same as site (8v) ### MOISOURC - **** — No method used to measure water volume - **1** — Water volume measured gravimetrically - **2** — Water volume measured with a time domain refractometer (tdr)