Fall River StudyUniversity of Washington TA Collaboration

1) Barry Flaming, M.S. finished 2001- NCASI, Gessel Fund, CFR scholarships, SMC

2) Amy Sidell, M.S. finished 2000- Gessel Fund, CFR scholarships, TA, SMC

3) Gage Wagoner, M.S. finished 2002- SMC

4) Christopher Licata, M.S. expected Fall, 2002- USFS, NCASI, Gessel Fund, CFR scholarships, TA, SMC

3) John Ensley, left program4) Brian Strahm, entered M.S. program 6/02

- Gessel Scholar, SMC, CFR, TA5) Tina Jensen, entered M.S. program 8/02

- Gessel Scholar, SMC, CFR, TA

Fall River StudyUniv. of Washington Other Collaboration

1) Paul Carpenter graduated B.S. Forestry, 1999- helped with field and lab work

2) Reese Lolley now a M.S. student in Fire Ecology- started working hourly and later entered grad. school

3) Dr. Joerg Prietzel, Univ. Munich, Germany- worked on N mineralization and soil work

4) Dr. Irae Guerrini, Univ. de Estado de Sao Paulo, Botucatu- 2 years visiting professor, worked on biomass and soil

Several other undergraduate students worked on various aspects of the Fall River study

UW Workers at Fall River

Aboveground tree biomass

live deadfoliage branches branches

BLOCK 1 9,702 31,692 13,776BLOCK 2 9,955 33,032 14,864BLOCK 3 10,883 34,050 13,245BLOCK 4 11,502 36,533 13,643SITE average 10,510 33,827 13,882SITE St. dev. 833 2,047 692

––––––––––––– kg/ha –––––––––––––––

Aboveground tree biomass

bole bole total above-wood bark ground tree

BLOCK 1 342,639 36,981 432,690BLOCK 2 360,316 39,015 455,082BLOCK 3 362,147 38,762 456,539BLOCK 4 367,629 39,804 465,903SITE average 358,183 38,641 452,554SITE St. dev. 10,819 1,192 14,084

––––––––––––– kg/ha –––––––––––––––

Total understory vegetation (n=12)

total dry total totalbiomass C N

BLOCK 1 291 110 5.6BLOCK 2 270 120 6.6BLOCK 3 185 80 3.6BLOCK 4 136 67 3.6SITE average 221 94 4.9SITE St. dev. 73 25 1.5

––––––––––––– kg/ha –––––––––––––––

Coarse Woody Debris by Decay Class (note Mg/ha)

BLOCK 1 2 3 4 5 6 Moss Total

BLOCK 1 1.6 1.6 110 26 5.0 0.3 0.2 145BLOCK 2 3.3 2.1 60 37 0.5 0.2 0.3 103BLOCK 3 1.8 3.1 62 24 0.2 0.5 0.5 92BLOCK 4 2.3 4.4 173 50 0.1 0.2 0.4 230SITE average 2.2 2.8 101 34 1.4 0.3 0.3 143SITE St. dev. 0.8 1.2 53 12 2.4 0.1 0.1 63

–––––––––– Decay Class ––––––––––

––––––––––––––––––––––– Mg/ha –––––––––––––––––––––

Coarse Woody Debris by Decay Class

BLOCK 1 2 3 4 5 6 Moss–––––––––––––––––– percent ––––––––––––––––

BLOCK 1 1 1 76 18 3 0 0BLOCK 2 3 2 58 36 0 0 0BLOCK 3 2 3 67 26 0 1 0BLOCK 4 1 2 75 22 0 0 0SITE average 2 2 69 26 1 0 0

–––––––––––– Decay Class –––––––––––––

Total weight of soil "O" horizon

BLOCK dry wt. total C total N C:N–––––––––––––– kg/ha ––––––––––––––

BLOCK 1 70,416 31,027 560 55 BLOCK 2 83,431 36,623 616 59 BLOCK 3 67,295 28,182 598 47 BLOCK 4 83,948 33,424 637 52 SITE avg. 76,273 32,314 603 54 SITE S.D. 8,661 3,584 33 5

Total C in soil

Soil HorizonBLOCK A B B B B 0-91.5cm

––––––––––––––––––––––– cm ––––––––––––––––––––––avg.depth 0-14.5 -24.5 -44.5 -64.5 -91.5

–––––––––––––––––––––– kg/ha –––––––––––––––––––––BLOCK 1 76,064 45,590 82,732 35,283 31,756 271,424 BLOCK 2 71,611 45,388 62,065 40,826 27,667 247,558 BLOCK 3 41,383 54,731 83,205 50,038 4,421 233,777 BLOCK 4 71,794 41,116 62,114 37,489 20,687 233,200 SITE avg. 65,213 46,706 72,529 40,909 21,133 246,490 SITE S.D. 16,019 5,734 12,056 6,498 12,042 52,349

Bigger, 1988 found 58,500 kg/ha C for the 0-50 cm depth at Pack Forest "high" site, which

is a lower quality site than Fall River. Fall River had about 185,000 kg C/ha to this depth.

soil C (%)

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

0 2 4 6 8 10 12

soildepth(cm)

Soil C vs. depth profile at Fall River. Note substantial C at depth!

Total N in soil

Soil HorizonBLOCK A B B B B 0-91.5cm

–––––––––––––––––––––––– kg/ha –––––––––––––––––––BLOCK 1 1,588 1,416 1,092 1,365 1,365 6,827 BLOCK 2 3,113 2,419 3,647 2,913 2,186 14,277 BLOCK 3 1,746 2,644 4,469 3,079 2,846 14,784 BLOCK 4 3,288 2,103 3,434 2,409 1,564 12,798 SITE avg. 2,434 2,146 3,160 2,442 1,990 12,172 SITE S.D. 891 535 1,449 772 669 4,316

Pre-Harvest Pools of dry weight at Fall River

Foliage = Live branches =

Dead branches =

Bole = Bole bark =

Understory = CWD =

Soil O =

kg/ha10,51033,82713,882

358,18338,641

221 143

76,273

Pre-Harvest Pools of dry weight at Fall RiverComparison to Kurz,1989, UBC, age 32-70 y, and Bigger, 1988, Pack Forest WTH study

Foliage = All branches =

Bole wood = Bole bark =

kg/ha10,51047,709

358,18338,641

Kurzkg/ha

10,58316,216

198,16725,400

Biggerkg/ha

10,50024,800

281,000(+bark)

Pre-Harvest Pools and Fluxes of Carbon at Fall River Site

Foliage = Live branches =

Dead branches =

Bole = Bole bark =

Understory = CWD =

Soil O =Soil A =Soil B =

C (kg/ha)xxx

xx

95x

32,31465,213

181,277