Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Physical Sciences and Mathematics
Phosphorus Recycling By Profunda Quagga Mussels In Lake Michigan, Caroline Mosley
Phosphorus Recycling By Profunda Quagga Mussels In Lake Michigan, Caroline Mosley
Theses and Dissertations
Quagga mussels (Dreissena rostiformis bugensis) act as ecosystem engineers in the southern basin of Lake Michigan, altering physical habitats and biogeochemical processes. Adapted to cold and oligotrophic conditions, profunda quagga mussels thrive on the soft substrate of deeper depths. At a 55 m site (10,000 mussels m-2) offshore from Milwaukee, WI, profunda mussel biomass (g m-2) was 1/3 of biomass (g m-2) measured at a 10 m comparison site (5,000 mussels m-2). Higher densities but less biomass is due to profunda mussels having less tissue for a given length and the population per m2 comprising of mostly small mussels ( …
Plankton Trophic Structure Within Lake Michigan As Revealed By Stable Carbon And Nitrogen Isotopes, Zachery G. Driscoll
Plankton Trophic Structure Within Lake Michigan As Revealed By Stable Carbon And Nitrogen Isotopes, Zachery G. Driscoll
Theses and Dissertations
Zooplankton represent a critical component of aquatic food webs in that they transfer energy from primary producers to higher trophic positions. However, their small size makes the application of traditional trophic ecology techniques difficult. Fortunately, novel techniques have been developed that can be used to elucidate feeding information between zooplankton species. I used the analysis of stable carbon and nitrogen isotope ratios to estimate the trophic structure of Lake Michigan's zooplankton community. The major zooplankton species, three size classes of seston, and seston from specific water column depths were collected in 2011 and 2012 for stable isotope analysis. Trophic position …
The Occurrence, Fate, Environmental Impact, And Management Implications Of Pharmaceutical And Personal Care Products In Wastewater And The Environment, Benjamin Donald Blair
The Occurrence, Fate, Environmental Impact, And Management Implications Of Pharmaceutical And Personal Care Products In Wastewater And The Environment, Benjamin Donald Blair
Theses and Dissertations
Pharmaceuticals and personal care products (PPCPs) are a critical part of modern life. However, there is growing evidence that the levels of PPCPs detected in wastewater effluent and in the environment have the potential to cause damage to aquatic organisms. These pollutants enter the aquatic environment primarily through human use, disposal in the drain or toilet, land application of biosolids, and veterinary sources. Numerous questions remain regarding the occurrence, fate, and impacts of PPCPs in wastewater, along with limited feasible management recommendations that would adequately mitigate the risk from these pollutants. This dissertation will present three advances in the field …