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Distribution Patterns Of The Invasive Mussel Arcuatula Senhousia In Mission Bay, San Diego, California: Effects Of Sediment Grain Size And Byssus Thread Production On Predation, Samantha Ahlman
Theses
The ability of bivalves to avoid predation by using defensive behaviors such as burrowing and byssus production may vary depending on the sediment characteristics of a given habitat. The varying sediment characteristics that change with water velocity within estuaries may influence the distribution of bivalves and limit them to areas that optimize their ability to defend against predators. We examined the distribution patterns of the invasive Asian date mussel Arcuatula senhousia relative to the sediment grain size distribution in Mission Bay, an urban estuary located in San Diego, California, USA. Mussels and sediment were collected using an Ekman grab at …
Factors Influencing Asiatic Oak Weevil Interactions With Native Ecosystem Engineers Over Time, Daniel Rothschild O'Brien
Factors Influencing Asiatic Oak Weevil Interactions With Native Ecosystem Engineers Over Time, Daniel Rothschild O'Brien
Theses
I sought to build a model to predict current and future abundance of Asiatic oak weevil (Coleoptera: Curculionidae: Cyrtepistomus castaneus) by using the relative abundance of leaf tying and leaf rolling caterpillars. The Asiatic oak weevil is an exotic species that has been observed inside leaf ties and leaf rolls made by native Lepidoptera caterpillars. Chapter one is a review of the known relationships between animal constructs and exotic species. Within this review I transition from natural structures, to animal architects, and to ecosystem engineers and how they have a population dynamic impact on the invasive species. I also discuss …