Search Results - "Gunn, John M"

Forest defoliator outbreaks alter nutrient cycling in northern waters by Woodman, Samuel G., Khoury, Sacha, Fournier, Ronald E., Emilson, Erik J. S., Gunn, John M., Rusak, James A., Tanentzap, Andrew J.

“…Insect defoliators alter biogeochemical cycles from land into receiving waters by consuming terrestrial biomass and releasing biolabile frass. Here, we related…”
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Logging impacts on the biogeochemistry of boreal forest soils and nutrient export to aquatic systems: A review by Kreutzweiser, David P, Hazlett, Paul W, Gunn, John M

“…Logging disturbances in boreal forest watersheds can alter biogeochemical processes in soils by changing forest composition, plant uptake rates, soil…”
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Selenium and mercury in organisms: Interactions and mechanisms by Yang, Dan-Yi, Chen, Yu-Wei, Gunn, John M, Belzile, Nelson

“…This paper reviews the growing literature dealing with the antagonistic effect of selenium (Se) compounds on the toxicity of mercury (Hg) compounds in higher…”
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Predicting chronic copper and nickel reproductive toxicity to Daphnia pulex-pulicaria from whole-animal metabolic profiles by Taylor, Nadine S., Kirwan, Jennifer A., Johnson, Craig, Yan, Norman D., Viant, Mark R., Gunn, John M., McGeer, James C.

“…The emergence of omics approaches in environmental research has enhanced our understanding of the mechanisms underlying toxicity; however, extrapolation from…”
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Terrestrial support of lake food webs: Synthesis reveals controls over cross-ecosystem resource use by Tanentzap, Andrew J, Kielstra, Brian W, Wilkinson, Grace M, Berggren, Martin, Craig, Nicola, Del Giorgio, Paul A, Grey, Jonathan, Gunn, John M, Jones, Stuart E, Karlsson, Jan, Solomon, Christopher T, Pace, Michael L

“…Widespread evidence that organic matter exported from terrestrial into aquatic ecosystems supports recipient food webs remains controversial. A pressing…”
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Dry conditions disrupt terrestrial–aquatic linkages in northern catchments by Szkokan‐Emilson, Erik J., Kielstra, Brian W., Arnott, Shelley E., Watmough, Shaun A., Gunn, John M., Tanentzap, Andrew J.

“…Aquatic ecosystems depend on terrestrial organic matter (tOM) to regulate many functions, such as food web production and water quality, but an increasing…”
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Role of ambient light in structuring north-temperate fish communities: potential effects of increasing dissolved organic carbon concentration with a changing climate by Stasko, Ashley D., Gunn, John M., Johnston, Tom A.

“…The vertical light environment in freshwater lakes is sensitive to changes in dissolved organic carbon (DOC) concentrations, and DOC concentrations in most…”
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Implications of linear developments on northern fishes by Cott, Peter A, Schein, Allison, Hanna, Bruce W, Johnston, Tom A, MacDonald, Donald D, Gunn, John M

“…Canada's Northwest Territories (NWT) is currently the focus of significant exploration and development activity. In particular, increased global demand for oil…”
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Adaptability of lake charr (Salvelinus namaycush) in a changing world: newly recolonized landscapes reveal the significance of traits shaped during the Pleistocene by Gunn, John M., Louste-Fillion, Jasmine

“…Lake charr ( Salvelinus namaycush ), one of the most widely distributed freshwater species in northern North America (currently in about 5200 lakes), evolved…”
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Past, present and future of the fish community of Lake Orta (Italy), one of the world’s largest acidified lakes by Volta, Pietro, Yan, Norman D., Gunn, John M.

“…Since 1926, the fishes in Lake Orta, one of Italy’s deepest natural lakes, were heavily damaged by profundal hypoxia and acidification linked to oxidation of…”
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Catchment liming creates recolonization opportunity for sensitive invertebrates in a smelter impacted landscape by Gunn, John M., Kielstra, Brian W., Szkokan-Emilson, Erik

“…The response of a sensitive indicator species to the effects of catchment liming was assessed in a lake severely impacted by atmospheric emissions from a metal…”
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Percentage of methylmercury in the muscle tissue of freshwater fish varies with body size and age and among species by Lescord, Gretchen L., Johnston, Thomas A., Branfireun, Brian A., Gunn, John M.

“…It is commonly assumed that most (>95%) of the mercury (Hg) found in fish muscle is the toxic form, methylmercury (MeHg), due to its efficient assimilation and…”
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Scale and watershed features determine lake chemistry patterns across physiographic regions in the far north of Ontario, Canada by MacLeod, Josef, Keller, Wendel (Bill), Paterson, Andrew M., Dyer, Richard D., Gunn, John M.

“…Changes in the far north of Ontario (>50°N latitude), like climate warming and increased industrial development, will have direct effects on watershed…”
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The speciation of arsenic in the muscle tissue of inland and coastal freshwater fish from a remote boreal region by Lescord, Gretchen L., Johnston, Thomas A., Ponton, Dominic E., Amyot, Marc, Lock, Alan, Gunn, John M.

“…Elevated concentrations of total arsenic (As) have been reported in boreal freshwater fish in both human-impacted and relatively pristine areas. We assessed…”
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Arrive, survive and thrive: essential stages in the re-colonization and recovery of zooplankton in urban lakes in Sudbury, Canada by Yan, Norman D., Bailey, John, McGeer, James C., Manca, Marina M., Keller, Wendel (Bill), Celis-Salgado, Martha P., Gunn, John M.

“…The recovery of lakes from severe, historical acid and metal pollution requires that colonists of extirpated species arrive, survive and subsequently thrive. …”
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Impaired littoral energy pathways cause a shift to pelagic resources by fish in recovering lake food webs by Luek, Andreas, Morgan, George E., Wissel, Bjoern, Gunn, John M., Ramcharan, Charles W.

“…Fish communities may increase in biomass and productivity due to energy subsidies from the littoral invertebrate community. In lakes recovering from…”
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Biodilution of Organic Species of Arsenic in Freshwater Food Webs by Lepage, Adam T., Lescord, Gretchen L., Lock, Alan, Johnston, Thomas A., Gandhi, Jay, Gunn, John M.

“…Arsenic can accumulate in freshwater biota, sometimes reaching potentially harmful levels. However, the toxicity of arsenic strongly depends on which arsenic…”
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Forests fuel fish growth in freshwater deltas by Tanentzap, Andrew J., Szkokan-Emilson, Erik J., Kielstra, Brian W., Arts, Michael T., Yan, Norman D., Gunn, John M.

“…Aquatic ecosystems are fuelled by biogeochemical inputs from surrounding lands and within-lake primary production. Disturbances that change these inputs may…”
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Microbiome functioning depends on individual and interactive effects of the environment and community structure by Orland, Chloé, Emilson, Erik J. S., Basiliko, Nathan, Mykytczuk, Nadia C. S., Gunn, John M., Tanentzap, Andrew J.

“…How ecosystem functioning changes with microbial communities remains an open question in natural ecosystems. Both present-day environmental conditions and…”
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Legacy effects of acidification and climate warming affect recent recovery of diatom assemblages in Sudbury-region lakes (Ontario, Canada) by Cheng, Yuanyu, Michelutti, Neal, Meyer-Jacob, Carsten, Paterson, Andrew M., Keller, Wendel, Gunn, John M., Smol, John P.

“…Smelting activities have strongly affected the Sudbury (Ontario, Canada) region since the late-nineteenth century, leading to acidification and metal…”
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