Dataset

Database Code

SP008

Title

Effect of thinning pole stands on soil processes in southern Oregon, central Coast Range, and central western Cascades of Oregon (1994-1995 BLM Study)

Abstract

This study was conducted in different regions to determine if climatic regimes alter the effects of thinning pole stands. Forest managers are currently faced with increasingly complex demands in designing sulvicultural approaches that fulfill the need to maintain and in some cases, enhance forest health. As mature and old-growth forests with their high degree of structural heterogeneity are replaced by younger plantations with much simpler structure, there is concern that key habitat components are being lost for a number of plants and animals. A silviculture technique that could be used to increase the structural complexity of young stands to thin them; encouraging the development of higher structural complexity. The main purposes of this study is to determine how thinning pole stands influence below-ground processes. The central research question was whether or not this manipulation brings soil characteristics closer to those found in old-growth forests; in essence, accelerating the onset of old-growth-like characteristics via forest management.

Keywords

soil chemistry; soil respiration; respiration; disturbance; inorganic nutrients; organic matter; soil organic matter; forests; Long-Term Ecological Research (LTER); conifers; disturbance; inorganic nutrients; organic matter

Date begin

1994-01-01

Date end

1996-01-01

Principal Investigator

Robert P. Griffiths

Entities

1. SP00801

1. SP00801 - Attribute list

Attribute definitions

BULKDENSIT

Bulk density

DENI

Denitrification potential on a dry weight basis

DISTANCE

Distance in meters from beginning of transect

DOC

Dissolved organic carbon extracted from soils (dry weight basis)

EXTRAMM

Concentration of ammoniom extracted with 2m KCl (dry weight basis)

FDW

Wt fraction dry/wet wt soil

FORMAT

Format number

H2ORESP

CO2 released from soils incubated at 15 deg C amended with water (dry weight basis)

HEADSP

Concentration of CO2 in chamber at end of incubation time

LABRESP

Co2 released from soils incubated at 15 deg C with no amendments (dry weight basis)

LITTER

Letter depth

LOCAT

Position along transect where sample is taken, 1 = start of transect

MIN_N

Cencentration ammoniom after incubaton at 40 deg C for 7 days (dry weight basis)

PERMOI

Percent moisture (wet-dry/dry)x100

PH

pH

REGION

Region

SIR

CO2 released from soils incubated at 15 deg C amended with 1 um glucose (dry weight basis)

SOILTEMP

Soil temperature

SOM

Percent soil organic matter in mineral soil (by compustion at 550 c)

STCODE

FSDB Database Study code

TOTALCO2

Amount of CO2 released from forest floor per sq. meter per day

TREAT

Treatment type

TRIAD

Triad number

Enumerated domains

Enumerated domain for attribute: STCODE

Enumerated domain for attribute: REGION

Enumerated domain for attribute: TREAT