What about riparian systems: who benefits from an early seral forest condition
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Dr. Stan Gregory Dr. Stan Gregory Department of Fisheries Department of Fisheries & Wildlife Wildlife Oregon State University Oregon State University
description
What about riparian systems: who benefits from an early seral forest condition. Dr. Stan Gregory Department of Fisheries & Wildlife Oregon State University. Vannote et al. 1980. 24 hr NO 3 dynamics. Frady 2005. Banks 2005. Gregory et al. 1991. Large Wood Input to Streams. - PowerPoint PPT Presentation
Transcript of What about riparian systems: who benefits from an early seral forest condition
Dr. Stan GregoryDr. Stan GregoryDepartment of Fisheries & WildlifeDepartment of Fisheries & WildlifeOregon State UniversityOregon State University
Vannote et al. 1980
15N tracer recovered (%)
Forest
Streams
Agricultural
Streams
Urban
StreamsOrganic matter 9 – 58 8 – 64 38 – >99
Gaseous N2 and N2O loss <1 1 – 15 <1 – 10Downstream loss as NO3 55 – 79 44 – 89 <1 – 53
Frady 2005Frady 2005
Banks 2005Banks 2005
Gregory et al. 1991
OG VanSickle & Gregory 1990
CC VanSickle & Gregory 1990
OG Murphy and Koski 1989
OG McDade et al.1990
HypothesisHypothesis
AquaticAquatic•SlowSlow•PhysicalPhysical•SurfaceSurface
TerrestrialTerrestrial• FastFast• BiologicalBiological• DeepDeep
Aquatic Placement
Terrestrial Placement
Alnus rubra Decay Progression
Aquatic
Terrestrial
Year 2 Year 6 Year 14
Pseudotsuga menziesii Decay Progression
Aquatic
Terrestrial
Year 2 Year 6 Year 14
Percent Remaining Mass
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20.0
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100.0
0.00 5.00 10.00 15.00
Time (years)
Pe
rce
nt
Re
ma
inin
g M
as
s
ALRU Aquatic PSME Aquatic TSHE Aquatic
ALRU Terrestrial PSME Terrestrial TSHE Terrestrial
Mack Creek Cutthroat Trout
0
50
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1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002
Num
bers
Per
100
m
Clearcut Old Growth
Resident trout populations (Mack Creek)Resident trout populations (Mack Creek)CV = 26%CV = 26%
Anadromous salmon populations (Coast Anadromous salmon populations (Coast Range)Range)
CV = 60%CV = 60%
Flynn CreekFlynn CreekBefore logging CV = 39%Before logging CV = 39%After logging CV = 42%After logging CV = 42%
Needle BranchNeedle BranchBefore logging CV = 39%Before logging CV = 39%After logging CV = 130%After logging CV = 130%
0
50
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300
350
1980 1982 1984 1986 1988 1990 1992 1994 1996 1998
Max
imum
Dail
y Disc
harg
e (cfs
)
0
50
100
150
200
250
300
0 50 100 150 200 250 300 350
Peak Flow (cfs)
Num
bers
per
100
m
0
50
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250
300
350
400
50 100 150 200 250 300 350
Annual Peak Flow (cfs)
Cut
thro
at D
ensi
ty (#
/m2)
Clearcut Old-growth
Flynn CreekFlynn Creek
Deer Deer CreekCreek
Needle Needle BranchBranch
StreamStream FlynnFlynn DeerDeer NeedleNeedle1959-651959-65 2.242.24 3.013.01 2.342.341966-741966-74 1.581.58 3.733.73 3.133.131988-961988-96 1.751.75 2.202.20 3.243.24
CVCV (standard deviation/mean) (standard deviation/mean)1959-651959-65 23.723.7 17.217.2 33.533.51966-741966-74 55.055.0 39.739.7 67.667.61988-961988-96 28.628.6 39.139.1 55.755.7
StreamStream FlynnFlynn DeerDeer NeedleNeedle1959-651959-65 3.653.65 2.742.74 3.343.341966-741966-74 3.423.42 2.802.80 1.711.711988-961988-96 2.162.16 2.102.10 1.791.79
CV (standard deviation/mean)CV (standard deviation/mean)1959-651959-65 47.947.9 40.340.3 16.616.61966-741966-74 14.514.5 22.722.7 45.345.31988-961988-96 35.335.3 24.824.8 66.566.5
Arkle and Pilliod 2010Arkle and Pilliod 2010
Arkle and Pilliod 2010Arkle and Pilliod 2010
Arkle and Pilliod 2010Arkle and Pilliod 2010
Increased aquatic primary productionIncreased aquatic primary productionIncreased nutrient uptake by algaeIncreased nutrient uptake by algaeIncreased quality of allochthonous Increased quality of allochthonous inputsinputsIncreased temperature can increase Increased temperature can increase growth and rates of biological growth and rates of biological processesprocesses
Increased temperature can decrease Increased temperature can decrease growth, increase disease, increase growth, increase disease, increase competition, and cause mortalitycompetition, and cause mortalityDecreased uptake of nutrients by Decreased uptake of nutrients by riparian plantsriparian plants
Decreased inputs of large wood Decreased inputs of large wood Decreased habitat complexityDecreased habitat complexityDecreased refuge during floodsDecreased refuge during floodsDecreased channel stabilityDecreased channel stabilityDecreased food and nutrient Decreased food and nutrient retentionretention
Proportion of landscape and river network Proportion of landscape and river network in early seral forestsin early seral forestsProportion of riparian areas in early seral Proportion of riparian areas in early seral stagesstagesNetwork patterns of environmental Network patterns of environmental factors, nutrients, and physical structurefactors, nutrients, and physical structureNetwork pattern of aquatic ecosystemsNetwork pattern of aquatic ecosystems
