@article{quinlan_quantitative_1998,
	title = {Quantitative inferences of past hypolimnetic anoxia in south-central {Ontario} lakes using fossil midges ({Diptera}: {Chironomidae})},
	volume = {55},
	issn = {0706-652X},
	shorttitle = {Quantitative inferences of past hypolimnetic anoxia in south-central {Ontario} lakes using fossil midges ({Diptera}},
	url = {http://www.nrcresearchpress.com/doi/abs/10.1139/f97-279},
	doi = {10.1139/f97-279},
	abstract = {The ability to infer long-term changes in hypolimnetic oxygen levels is important for ecological studies of eutrophication and the impacts of climatic change on freshwater lakes. We examined the distributions of fossil midge (Diptera: Chironomidae) assemblages in the surface sediments of 54 south-central Ontario lakes and, using canonical correspondence analysis (CCA), determined if fossil chironomid assemblages could be used to reconstruct levels of hypolimnetic anoxia in thermally stratifying Laurentian Shield lakes. Anoxia was expressed as the anoxic factor (AF), which represents the days per season that a sediment area equal to a lake's surface area is overlain by anoxic water. Forward selection in CCA showed that AF, maximum depth, [SO4], [Na], and watershed area all explained significant portions of species variation. A weighted-averaging regression and calibration model of the chironomid-anoxia relationship was developed which suggests that it is possible to infer AF from fossil chironomid assembla..., La capacité de modifier à long terme la teneur en oxygène dans l'hypolimnion est importante pour les études écologiques sur l'eutrophisation et les effets du changement climatique sur les lacs d'eau douce. Nous avons étudié la répartition d'assemblages de moucherons (Diptères : Chironomidés) fossiles dans les sédiments superficiels de 54 lacs du centre-sud de l'Ontario et, au moyen de l'analyse de correspondance canonique (ACC), nous avons déterminé si ces assemblages pouvaient être utilisés pour reproduire les niveaux d'anoxie de l'hypolimnion dans des lacs à stratification thermique du bouclier laurentien. L'anoxie était exprimée sous la forme du facteur d'anoxie (FA), qui correspond au nombre de jours par saison pendant lesquels une zone de sédiment de même superficie qu'un lac est recouverte d'eau anoxique. Une régression progressive dans l'ACC a montré que le FA, la profondeur maximale, [SO4], [Na] et la superficie du bassin hydrographique sont des éléments dont chacun rend compte d'une partie import...},
	number = {3},
	urldate = {2018-06-08},
	journal = {Canadian Journal of Fisheries and Aquatic Sciences},
	author = {Quinlan, Roberto and Smol, John P and Hall, Roland I},
	month = mar,
	year = {1998},
	note = {00134},
	keywords = {\#nosource},
	pages = {587--596},
}

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We examined the distributions of fossil midge (Diptera: Chironomidae) assemblages in the surface sediments of 54 south-central Ontario lakes and, using canonical correspondence analysis (CCA), determined if fossil chironomid assemblages could be used to reconstruct levels of hypolimnetic anoxia in thermally stratifying Laurentian Shield lakes. Anoxia was expressed as the anoxic factor (AF), which represents the days per season that a sediment area equal to a lake's surface area is overlain by anoxic water. Forward selection in CCA showed that AF, maximum depth, [SO4], [Na], and watershed area all explained significant portions of species variation. A weighted-averaging regression and calibration model of the chironomid-anoxia relationship was developed which suggests that it is possible to infer AF from fossil chironomid assembla..., La capacité de modifier à long terme la teneur en oxygène dans l'hypolimnion est importante pour les études écologiques sur l'eutrophisation et les effets du changement climatique sur les lacs d'eau douce. Nous avons étudié la répartition d'assemblages de moucherons (Diptères : Chironomidés) fossiles dans les sédiments superficiels de 54 lacs du centre-sud de l'Ontario et, au moyen de l'analyse de correspondance canonique (ACC), nous avons déterminé si ces assemblages pouvaient être utilisés pour reproduire les niveaux d'anoxie de l'hypolimnion dans des lacs à stratification thermique du bouclier laurentien. L'anoxie était exprimée sous la forme du facteur d'anoxie (FA), qui correspond au nombre de jours par saison pendant lesquels une zone de sédiment de même superficie qu'un lac est recouverte d'eau anoxique. 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A weighted-averaging regression and calibration model of the chironomid-anoxia relationship was developed which suggests that it is possible to infer AF from fossil chironomid assembla..., La capacité de modifier à long terme la teneur en oxygène dans l'hypolimnion est importante pour les études écologiques sur l'eutrophisation et les effets du changement climatique sur les lacs d'eau douce. Nous avons étudié la répartition d'assemblages de moucherons (Diptères : Chironomidés) fossiles dans les sédiments superficiels de 54 lacs du centre-sud de l'Ontario et, au moyen de l'analyse de correspondance canonique (ACC), nous avons déterminé si ces assemblages pouvaient être utilisés pour reproduire les niveaux d'anoxie de l'hypolimnion dans des lacs à stratification thermique du bouclier laurentien. L'anoxie était exprimée sous la forme du facteur d'anoxie (FA), qui correspond au nombre de jours par saison pendant lesquels une zone de sédiment de même superficie qu'un lac est recouverte d'eau anoxique. Une régression progressive dans l'ACC a montré que le FA, la profondeur maximale, [SO4], [Na] et la superficie du bassin hydrographique sont des éléments dont chacun rend compte d'une partie import...},\n\tnumber = {3},\n\turldate = {2018-06-08},\n\tjournal = {Canadian Journal of Fisheries and Aquatic Sciences},\n\tauthor = {Quinlan, Roberto and Smol, John P and Hall, Roland I},\n\tmonth = mar,\n\tyear = {1998},\n\tnote = {00134},\n\tkeywords = {\\#nosource},\n\tpages = {587--596},\n}\n\n\n\n","author_short":["Quinlan, R.","Smol, J. P","Hall, R. 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