Eli inventory REUcon

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Do fertilized trees grow
faster?
Looking for a growth response in the
MELNHE stands
Shoestring REU
Eli Egan-Anderson ...

Background
 Nitrogen (N) is one of the major limiting
nutrients for net primary production (NPP)
and is required in la...

Co-limitation
 Multiple Element Limitation (MEL) describes
plants effort allocation for acquiring different
nutrients ...

Predictions for the Study
 I expected to see positive growth in all stands
where fertilizer has been added
More growth...

Methods
 Diameter growth inventory stands
C1, C2 and C6
Young
 C1 cut in 1990
 C2 cut in 1988
 All trees with di...

Methods
 Diameter growth inventory stands
C1, C2 and C6
Mid aged
 C6 cut in 1975
 JBM cut in 1985
 All trees wit...

Methods
 Diameter growth inventory stands
C1, C2 and C6
Mature
 C8 cut in1883
 JBO cut in 1900
 All trees with d...

Methods Cont.
 Nail was placed at 1.57 m
and a 20 cm dowel was
hung from the nail to
measure below at DBH
 Compared...

Summary of original findings
 We measured in June/early July
Only significance before was white
birch in C2
 No long...

Tree Species Present
 Young Stands
American Beech
Pin Cherry
Red Maple
White Birch
 Mid and Mature
Stands
Americ...

American Beech
3
4
2 2
2
8
11
3
12
15
19
18
18
31
26
33
14
C1 = 0.07
C2 = 0.72
C6 = 0.39
C8 = 0.42
JB...

American Beech
3
4
2 2
2
8
11
3
12
15
19
18
18
31
26
33
14
C1 = 0.07
C2 = 0.72
C6 = 0.39
C8 = 0.42
JB...

Pin Cherry
5
3
5
8
12
3
2 8
1
2 6
3
8
10
7
C1 = 0.40
C2 = 0.73
C6 = 0.22
JBM = 0.53
3 3
6
0.6
0.5
0....

Red Maples
8
16
13
10
16
31
16
29
12
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Control N P N+P Ca
Basal Area G...

Sugar Maple
6
1
2
3
4
12
8
13
9
11
13
1
4
8
13
58
46
37
38
P Values
C6 = .60
C8 = .48
JBM = .88
JB...

White Birch
7
10
15
13
19
5
10
4
2
21
24
23
23
11
4
14
9
7
2
1.2
1
0.8
0.6
0.4
0.2
0
Control N ...

White Birch
7
10
15
13
19
5
10
4
2
21
24
23
23
11
4
14
9
7
2
1.2
1
0.8
0.6
0.4
0.2
0
Control N ...

40
24
19
20 15
22
27
4
4
1
5
18
20 4
17
13
8
11
3
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Control N P ...

40
24
19
20 15
22
27
4
4
1
5
18
20 4
17
13
8
11
3
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Control N P ...

Issues of note
 Hard to assign strong statistical
analysis to the plots with only one
or two trees of a species
 Tre...

Discussion
 Yellow birch shows a strong
response close to what we were
expecting
 C2 white birch no longer appears
...

Stem Mapping
Goals Methods
 Goals: to create a
georeferenced map
of all trees with a
DBH above 10 cm in
the mature ...

Sample Maps

Implications
 Help us to understand nutrient limitations of
the Northern forests
 Addresses factors we may see with a...

Acknowledgements and
Citations
 Our glorious leader
(Adam Wild)
 Shinjini Goswami
 Ruth Yanai
 Timothy Fahey
 ...

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