Show simple item record

dc.contributor.authorDorning, Sandra
dc.date.accessioned2018-04-09T22:23:28Z
dc.date.available2018-04-09T22:23:28Z
dc.date.issued2017
dc.identifier.urihttp://hdl.handle.net/1794/23078
dc.descriptionSubmitted to the Undergraduate Library Research Award scholarship competition: (2017-2018). 120 pages.en_US
dc.description.abstractBotrylloides violaceus, a colonial ascidian, is a cosmopolitan invader of fouling communities on man-made structures in harbors including Oregon’s Coos Estuary. This study documents seasonal and spatial patterns of B. violaceus distribution, assesses the impact of abiotic factors on this distribution, and characterizes the demography of this population and its interactions with other fouling organisms. I surveyed five fouling communities on docks in the Coos Estuary, and observed B. violaceus at all sites except Isthmus Slough in the upper bay. In laboratory experiments B. violaceus survived temperatures up to 27 degrees centrigrade and salinities down to 25 psu, indicating that temperature and salinity do not limit its distribution to the lower bay as hypothesized. Botrylloides violaceus overgrew all fouling species encountered on settlement plates except for sponge Halichondria bowerbanki. Understanding the interactions between B. violaceus and its abiotic and biotic surroundings is critical for improving invasive species management in the Coos Estuary.en_US
dc.language.isoen_USen_US
dc.publisherUniversity of Oregonen_US
dc.rightsCreative Commons BY-NC-ND 4.0-USen_US
dc.titleThe Ecology and Demography of the Invasive Ascidian Botrylloides violaceus in the Coos Estuaryen_US
dc.typeThesis / Dissertationen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record