Allelopathic Effects of Alternanthera Philoxeroides on Algal growth

Thuan dang, and Dr. Christopher Beals, Department of arts and sciences, Abraham Baldwin Agricultural College, 2802 Moore highway, Tifton Ga 31793

Alternanthera philoxeroides, also known as Alligator Weed, is an invasive plant species that is native to South America. Alligator Weed is an aquatic plant that has wreaked havoc in our freshwater ecosystems by negatively affecting algal and macroinvertebrate communities through the release of allelopathic chemicals. Alligator Weed is an invasive species that is not easily removed by mechanical extraction or herbicide applications. In a series of laboratory experiments, we examined the allelopathic effects of Alligator Weed on periphyton that were grown in the lab using tap water and hydroponic fertilizer. A field fluorometer was used to measure chlorophyll, an indicator of algal density, after the algae were exposed to Alligator Weed plants in a root zone exposure. Alligator Weed exudates, Hydrocotyle verticillata (a native plant), and plastic plants were used for comparison. In addition, Daphnia magna was used to measure the negative effects of Alligator Weed in a series of laboratory experiments using both mortality and stress as toxicological endpoints.

Additional Abstract Information

Presenter: Thuan Dang

Institution: Abraham Baldwin Agricultural College

Type: Poster

Subject: Biology

Status: Approved

Time and Location

Session: Poster 2
Date/Time: Mon 3:00pm-4:00pm
Session Number: 2642