Title: Differences%20in%20soil%20organic%20matter%20and%20soil%20texture%20in%20newly%20constructed%20experimental%20wetlands
1Differences in soil organic matter and soil
texture in newly constructed experimental
wetlands
Catherine Bodnar Sam Merrett Becca Brooke
2EDIC Wetland Project
1 No Planting
2 Low Intensity Planting
3 High Intensity Planting
4 No Planting
5 Low Intensity Planting
6 High Intensity Planting
The objective of the EDIC study is to determine
which of three planting treatments best restores
function in constructed wetlands
3Study Objectives
- Collect baseline data on SOM and texture to
assess future effects of treatments - Determine how construction affected SOM and
texture
4The Importance of Texture and Soil Organic Matter
Both soil texture and soil organic matter are
important to other soil properties and can be a
good indicator of how an ecosystem is functioning
5Methods Sample Collection
B
A
C
D
E
F
G
1
- 6 wetland cells
- 225 Ft. X 115 Ft.
- Data set 1
- SOM Green Xs
- 12 samples/cell
- 36 cores/cell
- Texture yellow circles
- 4 samples/cell
- 12 cores/cell
- Data set 2
- SOM Black Oval
- 5 samples/cell
- 15 cores/cell
2
3
4
5
6
7
8
6Methods Sample Analyses
- Texture
- Removed 50 g from oven-dried sample
- Mixed in blender to separate soil particles
- Took hydrometer readings to estimate percentages
of sand, silt, and clay
- Soil Organic Matter
- Hammered baked soil for
- further homogenization
- Weighed soil and crucible
- Incinerated at 400ºC
- Used difference in weight of soil before
and after incineration to estimate percent SOM
7Soil Texture Results
SAND
- statistical difference in silt and clay , not
in sand - East to West gradient
SILT
CLAY
8Statistical difference between cells East to
west SOM gradient
SOM Results
9SOM and Texture Distribution
1
2
3
4
5
6
East Group
West Group
There IS a statistically significant difference
for SOM, Silt and Clay between the western and
eastern groups, and NOT among group members
10Implications
1
4
2
5
3
6
SOM and Silt
No Planting
Low Intensity Planting
High Intensity Planting
Clay??
1
4
2
5
3
6
No Planting
Low Intensity Planting
High Intensity Planting
Researchers will have to consider There is
statistical difference between some
replicates Measured variables effect other soil
properties
11Wetland Construction Didnt Change Measured
Variables
Sabel et. al. (SOM)
Soil Survey Data (texture)
MkA Mahoning-Tiro silt loam TrA Trumball
12Special Thanks To
- John Petersen
- Brad Masi
- Josh Smith