growthdeathCO2Dead treeLive tree1000 hour fuelDX site Sequoia Kings Canyon National ParksUSGS Collaborators Nate Stephenson and Adrian DasFate of standing dead trees DecayDegradeFallSpecies and size d ID: 865693
Download Pdf The PPT/PDF document "Dead tree cycle" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
1 Dead tree cycle growthdeath CO2 Dead tr
Dead tree cycle growthdeath CO2 Dead tree Live tree 1000+ hour fuel DX site: Sequoia Kings Canyon National Par
2 ksUSGS Collaborators: Nate Stephenson an
ksUSGS Collaborators: Nate Stephenson and Adrian Das Fate of standing dead trees DecayDegradeFall Species (and
3 size) differences in fall rates Wood Dec
size) differences in fall rates Wood Decay Rates Dead tree cycle growthdeath CO2 Dead tree Live tree 1000+ hou
4 r fuel Time (years) preBiomass (tons/acr
r fuel Time (years) preBiomass (tons/acre) 121200350500650800915 Standing dead tree 1000 hr fuel Live tree 201
5 4-16 mortality event Dead Tree Cycle: Pr
4-16 mortality event Dead Tree Cycle: Preliminary modelSequoia Kings Canyon National Parks 2017 mortality even
6 t% loss of live tree biomass% increase i
t% loss of live tree biomass% increase in dead tree biomass 2017 Mortality Fuel Distributionvs 2030By 20301000+
7 hour fuel load doubles75% of the plots
hour fuel load doubles75% of the plots � 100 tons/ac90% have a least 60 tons/acAll plots with some 1000
8 + fuel Quantifying theoretical riskThe s
+ fuel Quantifying theoretical riskThe scale of present tree mortality is so large that greater potential for &
9 #147;mass fires” exists in the comi
#147;mass fires” exists in the coming decades…Stephens et al. 2018Bioscience Stephens et al. 2018 ORE
10 STECOVERYAFTERROUGHTORTALITY: RELIMINARY
STECOVERYAFTERROUGHTORTALITY: RELIMINARYESULTSFROMUMMERLauren Cox, PhD student, UC Berkeley Seedlingsstems 4.5
11 20004000600080001000012000140001600018
20004000600080001000012000140001600018000PLUMBRTNCGHYOMIYOPISIERRASEKIMTHSeedlings per acre * * Data shared b
12 y Sharon Hood PLUMBRTNCGHYOMIYOPISIERRAS
y Sharon Hood PLUMBRTNCGHYOMIYOPISIERRASEKIMTHSaplings per acreSaplingsstems ≥ 4.5 , 4 in DBH* Data shared b
13 y Sharon Hood Shrub Cover 100%PLUMBRTNCG
y Sharon Hood Shrub Cover 100%PLUMBRTNCGHYOMIYOPISEKIMTHShrub cover Yosemite Mixed Conifer Site 200004000060000
14 80000100000120000100%Stems per acrePerce
80000100000120000100%Stems per acrePercent shrub cover SequoiaKings CanyonTrees: stems ≥ 4 in DBH White firIn
15 cense-cedarSugar pinePonderosa pineCA bl
cense-cedarSugar pinePonderosa pineCA black oakBasal area (ftac Live Decay 1 SequoiaKings CanyonSaplings: stems
16 ≥ 4.5 , 4 in DBH White firIncense-ce
≥ 4.5 , 4 in DBH White firIncense-cedarSugar pinePonderosa pineCA black oakSaplings per acre SequoiaKings C
17 anyonSeedlings: stems ≤ 4.5 1000White
anyonSeedlings: stems ≤ 4.5 1000White firIncense-cedarSugar pinePonderosa pineCA black oakSeedlings per acre
18 Yosemite DX SitesSeedlings: stems 4.5
Yosemite DX SitesSeedlings: stems 4.5 2000400060008000100001200014000White firIncense-cedarSugar pinePondero
19 sa pineDouglas-firCA black oakSeedlings
sa pineDouglas-firCA black oakSeedlings per acre YOPI YOMI Yosemite DX SitesSaplings: stems ≥ 4.5 , 4 in DBH
20 White firIncense-cedarSugar pinePondero
White firIncense-cedarSugar pinePonderosa pineDouglas-firCA black oakSaplings per acre YOPI YOMI N. Stephenson
21 10/2015 from Beetle RockDrought Mortali
10/2015 from Beetle RockDrought Mortality: Implications for carbon and fuelsJohn Battles, ProfessorUC Berkeley