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Heath KorellJenna DavisNick PorterSean Taylor
Assessment of macrophytes and sediment depth accumulation at
OX Ranch
Outline
•Rationale and study area
•Methods
•Results from data
•Recommendations for macrophyte control
Rationale
•Severe overgrowth of macrophyte species
•Natural Eutrophication
•Could lead anoxic conditions
•Potential for fish kill
Methods
•Sediment Sampling▫ K-B Corer
Creates a vacuum for the sediment
▫Analyzed Biomass
Wet weight Dry weight Ash weight
MethodsMacrophyte Sampling
▫Large Macrophyte Sampler▫Analyzed
Phosphorous Analysis Biomass
Wet weight Dry weight Ash weight
Types of Macrophytes we gathered
Coontail
Oaks Pondweed
Duckweed
Milfoil
Site 1 core results
1 2 3 4 5 6 7 80123456789
10
Site 1 core
% 0rganic matter
Depth
(cm
)
32 34 36 38 40 42 44 460123456789
10
Site 1 core
% water content D
epth
(cm
)
Site 2 core results
2 3 4 50123456789
10
Site 2 core
% organic matter
Depth
(cm
)
20 22 24 26 28 30 32 34 36 38 400
1
2
3
4
5
6
7
8
9
10
Site 2 core
% water content
Depth
(cm
)
Site 3 core results
0.8 1 1.2 1.4 1.6 1.8 2 2.20
1
2
3
4
5
6
7
8
9
10
Site 3 core
% organic matter
Depth
(cm
)
24 26 28 30 32 34 360
1
2
3
4
5
6
7
8
9
10
Site 3 c...
% water content
Depth
(cm
)
Total phosphorous in pond 3
1 2 3 4 50
100
200
300
400
500
600
Site
Tota
l P
hosp
horo
us
µg/L
Biomass
Myriophyllum Ceraphyllum Lemna Unidentifiable Potamogeton0
10
20
30
40
50
60
70
80
90
Species
Bio
mass
(g/m
2)
Implications/Recommendations
•Raking▫Create macrophyte channels for habitat (Olson et. al, 1998)
▫$495.00▫5 ft. Wide
•Use a Biological Control▫Triploid Grass Carp
Herbivore•Cost
▫8-9 fish▫$10-$20/ fish▫Permit to import carp $23.50
•Carp must be certified triploid•Certified free of Asian Tapeworm
Summary
•Core lengths and Macrophyte samples were collect
•Analysis of core composition and phosphorus
•Macrophyte genera and their biomass
•Management Implications
