Life Sciences Commons^™

Ecological Importance Of Invader Source Population And Disturbance In Aquatic Invasions, Nicole Elizabeth Graham

Graduate Theses and Dissertations

Invasive species are a global problem and their effects on recipient ecosystems may be mediated by disturbance and intraspecific variation. Crayfish can substantially influence stream structure and function, and invasive crayfish often have differential impacts than native crayfish in aquatic ecosystems. Since species traits often vary across a distribution, it is possible that invasive crayfish from different source populations may have distinct impacts on recipient ecosystem structure and function. In the Ozark Highlands of Arkansas and Missouri, USA, invasive O. neglectus (the Ringed Crayfish) may be leading to the displacement of native O. eupunctus (the Coldwater Crayfish). The objective of …

Oxidation Of Substituted Catechols At The Air-Water Interface: Production Of Carboxylic Acids, Quinones, And Polyphenols, Elizabeth A. Pillar, Marcelo I. Guzman

Chemistry Faculty Publications

Anthropogenic activities contribute benzene, toluene, and anisole to the environment, which in the atmosphere are converted into the respective phenols, cresols, and methoxyphenols by fast gas-phase reaction with hydroxyl radicals (HO(•)). Further processing of the latter species by HO(•) decreases their vapor pressure as a second hydroxyl group is incorporated to accelerate their oxidative aging at interfaces and in aqueous particles. This work shows how catechol, pyrogallol, 3-methylcatechol, 4-methylcatechol, and 3-methoxycatechol (all proxies for oxygenated aromatics derived from benzene, toluene, and anisole) react at the air-water interface with increasing O3(g) during τc ≈ 1 μs contact time and contrasts their …

Fisheries & Stream Quality Update For The Kankakee River Basin, Stephen Pescitelli

Kankakee River Watershed Conference

Author keywords: stream quality, index of biotic integrity, walleye stocking

Scholarship domain: community application

Changes In Cormorant Populations In The Strait Of Georgia, British Columbia, 1955-2015, Harry R. Carter, Trudy A. Chatwin, Mark C. Drever

Salish Sea Ecosystem Conference

Between 1987 and 2000, nesting populations of Pelagic Cormorant (Phalacrocorax pelagicus; PECO) and Double-crested Cormorant (P. auritus; DCCO) declined in the Strait of Georgia, BC. This northern section of the Salish Sea is a rapidly urbanizing area, and piscivorous birds are important indicators of ecosystem health. To update population status, we conducted a complete survey of 35 PECO and 23 DCCO colonies in July 2014 and opportunistic surveys of some colonies between 2001 through 2015. The PECO population decreased from ~2100-2400 nests in 1959-1987 to ~1100 nests by about 2000, and then rose slightly …

Advances In Salish Sea Acoustic Telemetry: 2015 Array Deployments And Promising Transmitter Performance, Erin L. Rechisky, David W. Welch, Aswea D. Porter, Paul Winchell

Salish Sea Ecosystem Conference

The first fish tracking arrays were deployed in the Salish Sea over a decade ago. These arrays have yielded a rich data set which have provided the first direct estimates of early marine-survival and migratory behavior for acoustic-tagged juvenile sockeye, Chinook, Coho and steelhead >130 mm in fork length (FL). In spring of 2015, as part of the Salish Sea Marine Survival Project, the Pacific Salmon Foundation, the Ocean Tracking Network and Kintama Research deployed additional arrays in the Discovery Islands and Johnstone Strait (north of the Strait of Georgia) to provide higher resolution survival data. These new arrays use …

Stronger Together: The Cross-Cultural Coalition To Stop Fossil Fuel Exports In The Salish Sea, Margaret Allen

Salish Sea Ecosystem Conference

A commonly observed paradox in conservation is that restriction of people’s access to nature and natural resources may protect ecosystem health, but sometimes decreases the wellbeing of local people and can invite conflict and reduce people’s willingness to protect resources. At a middle ground between complete protection and unrestricted commercial use is ecosystem-based management (EBM), which strives to maximize the overall wellbeing of both people and ecosystems. An important domain of human wellbeing to track for the purposes of EBM is resource access, or the ability to gain and maintain uses and benefits of the natural environment. Access does not …

River Report. State Of The Lower St. Johns River Basin, Florida: Water Quality, Fisheries, Aquatic Life, Contaminants, 2017, Environmental Protection Board, City Of Jacksonville, University Of North Florida, Jacksonville University, Gerry Pinto, Nisse Goldberg, Radha Pyati, Anthony Ouellette, Gretchen Bielmyer-Fraser, An-Phong Le, Brian P. Zoellner, Peter Bacopoulos

State of the River Report

No abstract provided.