Common Name Species Name




Дата канвертавання24.04.2016
Памер19.09 Kb.
Table X. Percent frequency of occurrence of aquatic plant species at depths  15 feet sampled during point-intercept surveys on Carlos Lake, Douglas County, MN, 20 August 2008 and 10 August 2009.


Common Name


Species Name

Growth Form


Frequency (%)

2008 2009

All rooted plants







84.5

84.3

Hardstem Bulrush

Scirpus acutus

Emergent

11.7

0

Canada waterweed

Elodea canadensis

Emergent

0.7

1.5

Cattail group

Typha sp.

Emergent

0.2

0.4

Bulrush group

Scirpus sp.

Emergent

0

5.5

Cane

Phragmites australis

Emergent

0

0.2

Yellow waterlily

Nuphar sp.

Floating-leaf

0

0.2

Muskgrass

Chara sp.

Submersed

62.2

71.7

Bladderwort group

Utricularia sp.

Submersed

18.2

21.5

Northern watermilfoil

Myriophyllum sibiricum

Submersed

15.9

17.4

Stonewort

Nitella sp.

Submersed

9.1

6.6

Flatstem pondweed

Potamogeton zosteriformis

Submersed

7.8

5.3

Leafy pondweed

Potamogeton foliosus

Submersed

7.8

0

Clasping-leaf pondweed

Potamogeton richardsonii

Submersed

5.1

6.2

Bushy pondweed

Najas flexilis

Submersed

4.7

1.1

Coontail

Ceratophyllum demersum

Submersed

2.9

1.1

Sago pondweed

Stuckenia pectinata

Submersed

2.2

1.7

White-stem pondweed

Potamogeton praelongus

Submersed

2.2

1.5

Floating-leaf pondweed

Potamogeton natans

Submersed

1.3

0.8

Curly-leaf pondweedb

Potamogeton crispus

Submersed

1.1

0.8

Variable pondweed

Potamogeton gramineus

Submersed

1.1

1.1

Wild celery

Vallisneria americana

Submersed

1.1

0.9

Straight-leaf pondweed

Potamogeton strictifolius

Submersed

0.5

0

Spiny naiad

Najas marina.

Submersed

0.4

0.8

Fries pondweed

Potamogeton friesii

Submersed

0.2

0

Naiad group

Najas sp.

Submersed

0.2

0

Small pondweed

Potamogeton pusillus

Submersed

0

4.5


aDespite June surveys in 2008 and 2009 that targeted this invasive plant during presumed peak biomass, no plants were sampled in either survey.


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