First and Last Name/s of Presenters

Annelise SlackFollow
LaTina SteeleFollow
Sara ZaytounFollow


Professor LaTina Steele

Participation Type


College and Major available



University Commons

Start Day/Time

4-21-2017 1:00 PM

End Day/Time

4-21-2017 3:00 PM


Apr 21st, 1:00 PM Apr 21st, 3:00 PM

Potential Role of Phenolics in Eurasian Watermilfoil (Myriophyllum spicatum) Invasion Success

University Commons

Although the detrimental effects of invasive aquatic plants like Eurasian watermilfoil (Myriophyllum spicatum) are well documented, the factors leading to successful aquatic plant invasions are poorly understood. High levels of chemical feeding deterrents in invasive plant species may be at least partially responsible when invasive plants overgrow and dominate the invaded community. To investigate the role of phenolics in Eurasian watermilfoil invasions, whole M. spicatum (invasive) and Ceratophyllum demersum (native) plants were collected from Osbourndale Pond in Derby, Connecticut during September 2016 and frozen at -80°C until phenolic analysis. Colorimetric assays were used to measure total phenolic and condensed tannin content of the two plant species. A choice feeding experiment was conducted to determine if phenolics produced by M. spicatum affected feeding by amphipods, the dominate herbivore at our study site. Artificial diets were prepared by incorporating palatable fish food into an agar matrix and pouring the agar food over window screen. The control diet contained only a palatable food, while the gallic acid diet contained the palatable food plus gallic acid at a concentration common in M. spicatum. Amphipods were simultaneously offered the control food and the gallic acid treated food. The number of squares that were cleared of food after 48 hours was recorded. Data analysis is currently underway, but results from this study can shed light on the role of phenolics in aquatic plant invasion success.


To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.