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Full-Text Articles in Physical Sciences and Mathematics
Sources And Sinks Of Microplastics In Canadian Lake Ontario Nearshore, Tributary And Beach Sediments, Anika Ballent, Patricia L. Corcoran, Odile Madden, Paul A. Helm, Fred J. Longstaffe
Sources And Sinks Of Microplastics In Canadian Lake Ontario Nearshore, Tributary And Beach Sediments, Anika Ballent, Patricia L. Corcoran, Odile Madden, Paul A. Helm, Fred J. Longstaffe
Earth Sciences Publications
Microplastics contamination of Lake Ontario sediments is investigated with the aim of identifying distribution patterns and hotspots in nearshore, tributary and beach depositional environments. Microplastics are concentrated in nearshore sediments in the vicinity of urban and industrial regions. InHumber Bay and Toronto Harbour microplastic concentrations were consistently greater than 500 particles per kg dry sediment. Maximum concentrations of ~28,000 particles per kg dry sediment were determined in Etobicoke Creek. The microplastic particles were primarily fibres and fragments less than 2 mm in size. Both low- and high-density plastics were identified using Raman spectroscopy. We provide a baseline for future monitoring …
Phosphorus Retention In A Lowland Neotropical Stream Following An Eight-Year Enrichment Experiment, Gaston E. Small, Marcelo Ardón, John H. Duff, Alan P. Jackman, Alonso Ramírez, Frank J. Triska, Catherine M. Pringle
Phosphorus Retention In A Lowland Neotropical Stream Following An Eight-Year Enrichment Experiment, Gaston E. Small, Marcelo Ardón, John H. Duff, Alan P. Jackman, Alonso Ramírez, Frank J. Triska, Catherine M. Pringle
United States Geological Survey: Staff Publications
Human alteration of the global P cycle has led to widespread P loading in freshwater ecosystems. Much research has been devoted to the capacity of wetlands and lakes to serve as long-term sinks for P inputs from the watershed, but we know much less about the potential of headwater streams to serve in this role. We assessed storage and retention of P in biotic and abiotic compartments after an 8-y experimental P addition to a 1st-order stream in a Neotropical wet forest. Sediment P extractions indicated that nearly all P storage was in the form of Fe- and Al-bound P …