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

Dep

th (c

m)

32 34 36 38 40 42 44 460123456789

10

Site 1 core

% water content D

epth

(cm

)

Site 2 core results2 3 4 5

0123456789

10

Site 2 core

% organic matter

Dep

th (c

m)

20 22 24 26 28 30 32 34 36 38 400123456789

10

Site 2 core

% water content

Dep

th (c

m)

Site 3 core results0.8 1 1.2 1.4 1.6 1.8 2 2.2

0123456789

10

Site 3 core

% organic matter

Dep

th (c

m)

24 26 28 30 32 34 360123456789

10

Site 3 c...

% water content

Dep

th (c

m)

Total phosphorous in pond 3

1 2 3 4 50

100

200

300

400

500

600

Site

Tota

l Pho

spho

rous

µg/

L

Biomass

Myriophyllum Ceraphyllum Lemna Unidentifiable Potamogeton0

10

20

30

40

50

60

70

80

90

Species

Bio

mas

s (g

/m2)

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