Dataset

Database Code

SA021

Title

Epiphytic macrolichens in relation to forest management and topography in a western Oregon watershed, 1997-1999

Abstract

Epiphytic macrolichen communities were sampled in 117 coniferous stands in Blue River watershed of western Oregon. Stands were sampled across various stand types defined by stand structure, according to age classes of the younger tree cohort and remnant tree retention. Remnant trees were those in an older cohort that remained following a stand disturbance that initiated tree regeneration, such as a timber harvest or natural forest fire. Stands were located in upland and riparian forests of two vascular plant series (western hemlock and true fir). Presence and abundance of all epiphytic macrolichen species were sampled in a 0.4 ha circular Forest Health Monitoring (FHM) plot in the 117 stands. Epiphytic lichen biomass (oven-dried, kg/ha) was estimated for three functional groups: nitrogen-fixing cyanolichens, forage lichens, and matrix lichens in 63 of the 117 stands.

Keywords

stand structure; populations; history; fires; biomass; community composition; plant species composition; topography; resource management; forests; old growth forests; lichens; Adaptive Management Areas (AMA); forest management; mature forests; young forests; epiphytes; fire history; populations

Date begin

1997-09-23

Date end

1999-09-15

Principal Investigator

Bruce P. McCune

Entities

1. SA02101
2. SA02102
3. SA02103
4. SA02104

1. SA02101 - Attribute list

2. SA02102 - Attribute list

3. SA02103 - Attribute list

4. SA02104 - Attribute list

Attribute definitions

ABUNDANCE

abundance code

AGECLASS

stand age classes of the younger cohort or codominant overstory

ASPECT

aspect is the direction in which the water flows down hill; degrees east of true north, measured with a compass

BACONIF

percent basal area of conifers in a stand (percentage of total basal area)

BAF

Basal Area Factor for the entire plot (used for all subplots)

BAHARDW

percent basal area of hardwood trees in a stand (percentage of total basal area)

BIOIND

categorical variable indicating if epiphytic macrolichen biomass was sampled in a stand

CODE

FHM/FIA species codes from U.S. FIA lichen community program

CYANOAV

average epiphytic cyanolichen biomass; oven-dried

CYANOSD

standard deviation of the average epiphytic cyanolichen biomass; oven-dried

DATE

Date of sampling

DBCODE

FSDB Database Code

DEADBA

basal area of dead trees, averaged over five variable-radius subplots; measured using a relescope in 1997 and an angle gauge in 1998 and 1999

ELEV

elevation is altitude measured in meters above sea level, recorded from the GPS unit

ENTITY

Entity number

FORAGEAV

average epiphytic forage lichen biomass for a stand; oven-dried

FORAGESD

standard deviation of the average epiphytic forage lichen biomass for a stand; oven-dried

HL

heat load index measures the amount of heat a site potentially receives during the day, derived from models based on latitude, slope, and aspect

LAT

latitude

LIVEBA

basal area of live trees, averaged over five variable -radius subplots; measured using a relescope in 1997 and an angle gauge in 1998 and 1999

LONG

longitude

MATRISAV

average epiphytic matrix lichen biomass; oven-dried

MATRIXSD

standard deviation of the average epiphytic matrix lichen biomass for a stand; oven-dried

PDIR

potential direct incident radiation; represents the amount of light a site potentially receives, derived from latitude, slope, and aspect (McCune and Keon 2002)

PERBAREM

percent basal area of live remnant trees in a stand (percentage of total basal area)

PLOT

plot (stand) name; all beginning with SB followed by a number

PLTSERIE

vascular plant series

REMBA

basal area of live remnant trees, averaged over five variable-radius subplots; measured using a relescope in 1997 and an angle gauge in 1998 and 1999

REMCLASS

retention classes for the percent of remnants in the older cohort (historical retention based on the percent canopy cover of live remnant trees that survived the most recent disturbance)

SLOPE

the % slope at plot center, measured with a clinometer

SPECIES

Lichen scientific name

TOPOCLA

topographic classes (upland or riparian areas)

TOPOPOS

classes for the topographic position of the stand in relation to the surrounding landscape

TOTBA

total basal area of live and dead trees, averaged over five variable-radius subplots; measured using a relescope in 1997 and an angle gauge in 1998 and 1999

Enumerated domains

Enumerated domain for attribute: DBCODE

Enumerated domain for attribute: PLOT

Enumerated domain for attribute: SPECIES

Enumerated domain for attribute: CODE

Enumerated domain for attribute: ABUNDANCE

Enumerated domain for attribute: PLTSERIE

Enumerated domain for attribute: AGECLASS

Enumerated domain for attribute: REMCLASS

Enumerated domain for attribute: TOPOCLA

Enumerated domain for attribute: TOPOPOS

Enumerated domain for attribute: BIOIND