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Surprising natural variation in nutrient availability and nutrient resorption
Craig SeeSUNY-ESF
Photo: USFS
Before the leaves fall. . .
•Nutrients move from leaves to stem tissues•Resorption Efficiency = percent of leaf nutrients resorbed before abscission•Is it a predictor of site nutrient status?
• Higher efficiency in nutrient poor sites (Flanagan and Van Cleve 1983, Boerner 1984)
• No effect (Chapin and Moilenan 1991, Schlesinger 1989)
45-63% less nitrogen
43-73% less phosphorus
(Boerner 1984)
Resorption in the MELNHE stands In 2009, trees in mid and old stands resorbed more phosphorus relative to nitrogen than in the younger stands.
2010 Methods
• Stands Sampled:Young: C1, C2Mid: C4, C6, HB-mid, JB-MidOld: C8, C9, HB-Old, JB-Old
• Fresh leaves sampled August, litter sampled in October
• Stand level resorption efficiency calculated as the mean of plot efficiencies.
• STILL PRETREATMENT
C1 C2 C4 C6 C8 C9 HB-M HB-O JB-M JB-O0%
10%
20%
30%
40%
50%
60%
70%
80%
2009 BEECH
Reso
rptio
n Effi
cienc
y
C1 C2 C4 C6 C8 C9 HB-M HB-O JB-M JB-O0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
2010 BEECH
Reso
rptio
n Effi
cienc
y
C1 C2 C4 C6 C8 C9 HB-M HB-O JB-M JB-O0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
2010 Sugar Maple
Reso
rptio
n Effi
cienc
y
C1 C2 C4 C6 C8 C9 HB-M HB-O JB-M JB-O0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
2009 SUGAR MAPLERe
sorp
tion
Efficie
ncy
C1 C2 C4 C6 C8 C9 HB-M HB-O JB-M JB-O0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
2009 YELLOW BIRCHRe
sorp
tion
Efficie
ncy
C1 C2 C4 C6 C8 C9 HB-M HB-O JB-M JB-O0%
10%
20%
30%
40%
50%
60%
70%
80%
2010 Yellow Birch
Reso
rptio
n Effi
cienc
y
Root P Concentrations by StandP Means
Con
cent
ratio
ns (
g/K
g)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
C1 YoungC2 YoungC4 MidC6 MidC8 OldC9 Old
0-1 5-10 10-20
Oa
Size
Depth
10-20 10-2010-205-10 5-10 5-100-1 0-1 0-1
0-10 10-30 30-50
1
43
2
C8 ROOT P CONCENTRATIONS (0-10cm depth)
1 2 3
AVAILABLE SOIL P FROM RESIN STRIPS
1 2 3 40
5
10
15
20
25
30
35
40
Oe layer
Resin
P (u
g/g)
1 2 3 40
5
10
15
20
25
Oa layer
Resin
P (u
g/g)
1 2 3 40
1
2
3
B layer
Resin
P (u
g/g)
CUMULATIVE P CONCENTRATION FOR AMMONIUM CHLORIDE + PEROXIDE + COLD NITRIC ACID LEACHES
0.000
0.020
0.040
0.060
0.080
0.100
0.120
0.140
0.160
0.180
0-10 cm10-30 cm30-50 cm
Plots
P Co
ncen
trati
on (m
g/g)
1 2 3
FOLIAR CONCENTRATIONS
1 2 3 40
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
Sugar Maple
fresh leaveslitterfall
Phos
phor
us (m
g/g)
1 2 3 40
0.2
0.4
0.6
0.8
1
1.2
1.4
Beech
fresh leaveslitterfall
Phos
phor
us (m
g/g)
10
0.20.40.60.8
11.21.41.61.8
2
Yellow Birch
fresh leaveslitterfall
Phos
phor
us (m
g/g)
Conclusions• Data suggests that site nutrient availability
does affect nutrient resorption• Many of the MELNHE stands (Not C8-3)
may be phosphorus limited• Nutrient limitation at what scale?
Thank You• Ruth Yanai• Melany Fisk• Steven Hamburg• Tim Fahey• Matt Vadeboncoeur• Doug Ryan• Kikang Bae• Shinjini Goswami• Braulio Quintero• Shoestring Crew
Aerts, R. 1996. Nutrient resorption from senescing leaves of perennials: Are there general patterns? Journal of ecology 84: 597-608
Boerner, R. 1984. Foliar nutrient dynamics and nutrient use efficiency of four deciduous tree species in relation to site fertility. Journal of Applied Ecology, 21: 1029-1040
Chapin, S., and L. Moilenan. 1991. Nutritional controls over nitrogen and phosphorus resorption from Alaskan birch leaves. Ecology 72: 709-715
Cote, B., J.W. Fyles, H. Djalilvand 2002. Increasing N and P resorption efficiency and proficiency in northern deciduous hardwoods with decreasing foliar N and P concentrations.
Flanagan, P. W., and K. Van Cleve. 1983. Nutrient cycling in relation to decomposition and organic matter quality in taiga ecosystems. Canadian Journal of Forest Research 13: 795-817.
Ryan, D.F., Bormann, FH. 1982. Nutrient resorption in northern hardwood forests. Bioscience 32: 29-32.
Schlesinger, W. H., E. H. DeLucia, and W. D. Billings. 1989. Nutrient-use efficiency of woody plants on contrasting soils in the western Great Basin, Nevada. Ecology 70:105-113
REFERENCES
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