NEWSDROP-SUMMER-2019

By the Numbers Changes in Aquatic Vegetation - 5 Year Study

2013

2018

C O M A L

Native aquatic vegetation: Ludwigia, Sagittaria, and Vallisneria in the Comal RIver, TX

9%

12% 19%

Cabomba

2% 30%

Hygrophila

4% 2%

Ludwigia

5% 8%

Nuphar

Sagittaria

14% 43%

Vallisneria

4% 42%

Other

6%

S A N M A R C O S

6%

3% 2% 33%

Cabomba

36% 10%

Colocasia (Elephant Ear)

Hydrilla

0%

Hydrocotyle

20%

19%

Hygrophila

1%

Ludwigia

6%

3% 9%

Potamogeton

9% 5%

Sagittaria

27%

Zizania (Texas Wild-Rice)

8%

3%

Other

Non-Native

Spotlight

The Comal and San Marcos Rivers look very different today than five years ago. The EAHCP programs have reinstated native plants to the point where, “The elephant ears are gone and the endangered native Texas wild-rice has really grown beyond what I anticipated.” Casey Williams, BIO-WEST Biologist

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