SP007 – Simplified metadata | Andrews Forest Research Program

Dataset

Database Code: SP007
Title: Disturbance effects on soil processes in the Andrews Experimental Forest (1995 Stand Age Study)
Abstract: This study was designed to determine how edges generated by clear-cutting old-growth forests influence patterns of soil carbon and nitrogen cycling and the distribution of ectomycorrhizal mats and to determine how these patterns change with time after harvest. A secondary objective was to measure how clear-cutting within different climatic regimes influenced soil nitrogen and carbon cycling.
Keywords: community structure; meteorology; soil chemistry; tree age; carbon cycling; disturbance; inorganic nutrients; carbon; Long-Term Ecological Research (LTER); disturbance; inorganic nutrients
Date begin: 1995-01-01
Date end: 1995-12-01
Principal Investigator: Robert P. Griffiths

SP00701 - attributes
Attribute	Type	Domain	Minimum	Maximum	Unit
STCODE	varchar	enum
FORMAT	numeric(1.000000)	range	1.0000	1.0000	number
TRANS	numeric(1)	range	1.0000	28.0000	number
TRIAD	numeric(1)	range	1.0000	9.0000	number
ASP	varchar	enum
TREAT	varchar	enum
EDGDIST	numeric(1)	range	0.0000	75.0000	meters
POS	numeric(1)	range	0.0000	150.0000	meters
MOIST	numeric(1.000000)	range	7.0000	513.0000	percent
HIST	numeric(1.000000)	range	0.0000	100.0000	percent
GUAT	numeric(1.000000)	range	0.0000	100.0000	percent
MAT	numeric(0.100000)	range	0.1000	180.1000	percent
SOIL	numeric(0.100000)	range	9.2000	28.2000	degrees Celsius
PH	numeric(0.010000)	range	2.2600	6.4500	pH units
SOM	numeric(0.100000)	range	7.8000	154.7000	percent
LITTER	numeric(1.000000)	range	0.0000	30.0000	centimeters
AIR	numeric(0.100000)	range	0.0000	19.5000	degrees Celsius
LIGHT	numeric(1.000000)	range	0.0000	879.0000	number
RESP	numeric(0.010000)	range	0.0000	53.3000	grams per square meter per day
LTR	numeric(0.000000)	range	0.0000	12.8200	micrograms per gram
DENIT	numeric(0.010000)	range	0.0000	242.4300	micrograms per gram per hour
MIN_N	numeric(0.001000)	range	0.0000	1652.8000	micrograms per gram
EXTR_AMM	numeric(0.001000)	range	0.0000	88.0000	micrograms per gram

AIR: Air temperature taken at the time of field respiration measurement
ASP: Elevation/aspect code of site
DENIT: Denitrification potential (as N, dry wt basis)
EDGDIST: Distance from edge in meters
EXTR_AMM: Concentration of ammonium with 2m KCl (as n, dry wt basis)
FORMAT: Format number
GUAT: Percent of core containing Gautieria-like ectomycorrhizal mats
HIST: Percent of core containing Hysterangium-like ectomycorrhizal mats
LIGHT: Light intensity at time of field respiration
LITTER: Litter depth
LTR: Long-term lab soil respiration rate; co2 in headspace after 14 days (dry wt basis)
MAT: Percent of core containing all ectomycorrhizal mats
MIN_N: Mineralizable organic nitrogen; anaerobic incubation for 14 days at 40c (N , dry wt basis)
MOIST: Percent moisture (wet-dry/dry)x100
PH: pH value
POS: Position along transect from ends of transect
RESP: Rate of forest floor respiration without litter layer ( as C)
SOIL: Soil temperature at 10 cm from surface
SOM: Percent soil organic matter in mineral soil (by combustion at 550 C)
STCODE: FSDB Database Study code
TRANS: Transect number
TREAT: Treatment of stand (uncut or harvested)
TRIAD: Triad number for set of three harvest stand age classes

Codes for STCODE
Code	Description
SP007	FSDB Database Study Code SP007

Codes for ASP
Code	Description
LOW	Low elevation site
NORTH	High elevation site facing north
SOUTH	High elevation site facing south