Dataset

Database Code

SP033

Title

Soil respiration associated with ectomycorrhizal mats in an old-growth stand along lower Lookout Creek, HJ Andrews Experimental Forest (2008-2009)

Abstract

Comparisons of respiration rate and environmental variables for mat and non-mat soil were conducted between July 2008 to Nov 2009 in a 0.1ha plot adjacent lower Lookout Creek, approximately 700m downstream from Lookout Camp (44 deg 13”25’N, 122 deg 15”30’W, 484m above sea level). The predominant overstory species are Psuedotsuga menziesii, Tsuga heterophylla, and Thuja Plicata. Associated ectomycorrhizal communities were measured over the 1.5 year period and data collection for the study is complete. Soil respiration was measured using LiCOR instrumentation, and analyses were performed computationally by correlating soil respiration with known environmental metrics (moisture, temperature, etc.) measured in other studies (TW006, MV001, etc.).

Keywords

populations; carbon cycling; soil; fungi; microbes; populations

Date begin

2008-07-01

Date end

2009-11-30

Principal Investigator

Barbara J Bond

Entities

1. SP03301
2. SP03302
3. SP03303
4. SP03304

1. SP03301 - Attribute list

2. SP03302 - Attribute list

3. SP03303 - Attribute list

4. SP03304 - Attribute list

Attribute definitions

CO2_AVG

Initial CO2 concentration in soil chamber

COARSE_ROOTS

Mass of roots >8mm diameter (g water/g dry soil)

CORE_AREA

Cross-sectional area of core (cm2)

CORE_ID

ID for soil core (different from respiration plot)

CORE_VOL

Total volume of core (cm3)

CTON_RATIO

Carbon to nitrogen ratio

DATE

Date of measurement

DBCODE

Database Code

DEPTH

Depth of core

EFFLUX_AVG

Average efflux from 2 or 3 measurements in immediate succession

EFFLUX_SE

Standard error of mean

ENTITY

Entity number

EST_VWC_5CM

Estimated volumetric water content at 5cm using a bulk density of 0.75

EST_VWC_15CM

Estimated volumetric water content at 15cm using a bulk density of 0.78

FINE_ROOTS

Mass of roots less than 2mm diameter (g water/g dry soil)

GWC

Gravimetric water content (g water/g dry soil)

GWC_5CM

Gravimetric water content 5cm below mineral soil surface (g water per g dry soil)

GWC_15CM

Gravimetric water content 15cm below mineral soil surface (g water per g dry soil)

GWC_AREA

Coring field area

GWC_LITTER

Gravimetric water content of Oi and Oe horizons (g water per g dry soil)

LITTER_DEPTH

Total depth (cm) of Oi, Oe, and Oa layers.

LOCATION_NOTES

Notes regarding relocation of measurement

MAT_NON

Mat or non-mat soil type

PERCENTC

Total carbon content, by mass

PERCENTN

Total nitrogen content, by mass

PERC_WC_LITTER

Litter water content expressed as a percent of total weight

PH

pH

RESP_PLOT

ID for mat and non-mat pair (longterm measurement plot)

SOIL_WET_MASS

Total mass of field-moist core (g)

TEMP_10CM

Soil temperature at 10cm depth

THIN1_ROOTS

Mass of roots 2-4 mm diameter (g water/g dry soil)

THIN2_ROOTS

Mass of roots 4-6mm diameter (g water/g dry soil)

THIN3_ROOTS

Mass of roots 6-8mm diameter (g water/g dry soil)

TOTAL_ROOTS

Total root mass (g water/g dry soil)

Enumerated domains

Enumerated domain for attribute: DBCODE

Enumerated domain for attribute: RESP_PLOT

Enumerated domain for attribute: MAT_NON

Enumerated domain for attribute: GWC_AREA

Enumerated domain for attribute: CORE_ID

Enumerated domain for attribute: DEPTH