Suchergebnisse

AbstractBenthic cyanobacterial mats occurring in the St. Lawrence River fluvial lakes Saint-Louis and Saint-Pierre are dominated by Microseira (Lyngbya) wollei which produce several cyanotoxins including LWTX-1 that is characteristic of Microseira wollei. This cyanotoxin is not only present in the filaments forming benthic mats, but was also measured in the water overlying the mats. LWTX-1 was found in all cyanobacterial filament samples (75.29–103.26 ng mg−1) and all overlying water samples (3.01–11.03 ng L−1). Toxin concentrations measured in overlying water and dry biomass were strongly correlated (r = 0.94). Furthermore, LWTX-1 concentration in water was positively correlated with the dissolved organic carbon in water (r = 0.74) and % nitrogen content in cyanobacterial filaments (r = 0.52). A preliminary study was conducted to determine the release and degradation rates of LWTX-1 from a M. wollei mat kept under laboratory conditions over a 3-month period. Toxin measurements revealed an early, massive toxin release followed by a typical decaying function, with a half-life in the order of 17 days. Our results raise concerns about the occurrence and downstream advection of dissolved cyanotoxins from Microseira mats in the aquatic environment.

Frontmatter -- Contents -- Acknowledgments -- Introduction: Pragmatism Then and Now -- WHAT DIFFERENCE DOES PRAGMATISM MAKE? THE VIEW FROM PHILOSOPHY -- Pragmatism as Romantic Polytheism -- Response to Hilary Putnam's "Pragmatism and Realism" -- The Moral Impulse -- What's the Use of Calling Emerson a Pragmatist? -- PRAGMATISM AND THE REMAKING OF SOCIAL THOUGHT -- Pragmatism: An Old Name for Some New Ways of Thinking? -- Pragmatism and Democracy: Reconstructing the Logic of John Dewey's Faith -- Community in the Pragmatic Tradition -- Another Pragmatism: Alain Locke, Critical "Race" Theory, and the Politics of Culture -- Going Astray, Going Forward: Du Boisian Pragmatism and Its Lineage -- The Inspiration of Pragmatism: Some Personal Remarks -- The Missing Pragmatic Revival in American Social Science -- Pragmatism and Its Limits -- PRAGMATISM AND LAW -- Pragmatic Adjudication -- Freestanding Legal Pragmatism -- What's Pragmatic about Legal Pragmatism? -- Pragmatism and Law: A Response to David Luban -- It's a Positivist, It's a Pragmatist, It's a Codifier! Reflections on Nietzsche and Stendhal -- Pragmatism, Pluralism, and Legal Interpretation: Posner's and Rorty's Justice without Metaphysics Meets Hate Speech -- PRAGMATISM, CULTURE, AND ART -- Why Do Pragmatists Want to Be Like Poets? -- Pragmatists and Poets: A Response to Richard Poirier -- The Novelist of Everyday Life, -- When Mind Is a Verb: Thomas Eakins and the Work of Doing -- Religion and the Recent Revival of Pragmatism -- Afterword Truth and Toilets: Pragmatism and the Practices of Life -- Selected Bibliography -- Contributors -- Index