Paleoecological Evaluation of the Recent Acidification of Susceptible Lakes in Finland

Pertti Huttunen, Kaarle Kenttämies, Anita Liehu, Mikko Liukkonen, Tarja Nuotio, Olavi Sandman, Jaana Turkia

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

Abstract

The aims of this study were to reveal the causes of lake acidification and to study the acidification history and areal distribution of acidification of Finnish lakes. The 30 lakes selected for this study were mainly oligotrophic forest lakes. They do not represent statistically all lakes in Finland but are the most interesting, sensitive lakes. Estimates of inferred pH and alkalinity from sediment diatom assemblages were based on a calibration set of 92 lakes with surface sediment diatom assemblages and the corresponding chemistry of autumnal water samples. Of the studied 30 lakes, 43% had a significant recent decrease in alkalinity, 20% were naturally acidic, and 27% were with no acidification trends. Lakes with sediment with poorly preserved diatom frustules were 10% of the whole material. At all sites where recent acidification was recorded and the lake was deep enough, the proportion of planktonic diatoms decreased remarkably. In naturally acidic lakes, abundances of diatom plankton have also declined during the last century. In this study the chemical models used showed both larger and smaller acidification than the estimates from the palaeoecological approach. The recent acidification of small forest lakes is restricted to southern Finland where almost all acidic lakes have acidified since 1900. In central and northern Finland, on the other hand, the proportion of naturally acidic lakes is higher.
Original languageEnglish
Title of host publicationAcidification in Finland
EditorsPekka Kauppi, Pia Anttila, Kaarle Kenttämies
PublisherSpringer
Pages1071-1092
ISBN (Print)3-540-52213-1, 0-387-52213-1
Publication statusPublished - 1990
MoE publication typeD2 Article in professional manuals or guides or professional information systems or text book material

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acidification
lake
diatom
evaluation
alkalinity
sediment
plankton
calibration

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Huttunen, P., Kenttämies, K., Liehu, A., Liukkonen, M., Nuotio, T., Sandman, O., & Turkia, J. (1990). Paleoecological Evaluation of the Recent Acidification of Susceptible Lakes in Finland. In P. Kauppi, P. Anttila, & K. Kenttämies (Eds.), Acidification in Finland (pp. 1071-1092). Springer.
Huttunen, Pertti ; Kenttämies, Kaarle ; Liehu, Anita ; Liukkonen, Mikko ; Nuotio, Tarja ; Sandman, Olavi ; Turkia, Jaana. / Paleoecological Evaluation of the Recent Acidification of Susceptible Lakes in Finland. Acidification in Finland. editor / Pekka Kauppi ; Pia Anttila ; Kaarle Kenttämies. Springer, 1990. pp. 1071-1092
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abstract = "The aims of this study were to reveal the causes of lake acidification and to study the acidification history and areal distribution of acidification of Finnish lakes. The 30 lakes selected for this study were mainly oligotrophic forest lakes. They do not represent statistically all lakes in Finland but are the most interesting, sensitive lakes. Estimates of inferred pH and alkalinity from sediment diatom assemblages were based on a calibration set of 92 lakes with surface sediment diatom assemblages and the corresponding chemistry of autumnal water samples. Of the studied 30 lakes, 43{\%} had a significant recent decrease in alkalinity, 20{\%} were naturally acidic, and 27{\%} were with no acidification trends. Lakes with sediment with poorly preserved diatom frustules were 10{\%} of the whole material. At all sites where recent acidification was recorded and the lake was deep enough, the proportion of planktonic diatoms decreased remarkably. In naturally acidic lakes, abundances of diatom plankton have also declined during the last century. In this study the chemical models used showed both larger and smaller acidification than the estimates from the palaeoecological approach. The recent acidification of small forest lakes is restricted to southern Finland where almost all acidic lakes have acidified since 1900. In central and northern Finland, on the other hand, the proportion of naturally acidic lakes is higher.",
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Huttunen, P, Kenttämies, K, Liehu, A, Liukkonen, M, Nuotio, T, Sandman, O & Turkia, J 1990, Paleoecological Evaluation of the Recent Acidification of Susceptible Lakes in Finland. in P Kauppi, P Anttila & K Kenttämies (eds), Acidification in Finland. Springer, pp. 1071-1092.

Paleoecological Evaluation of the Recent Acidification of Susceptible Lakes in Finland. / Huttunen, Pertti; Kenttämies, Kaarle; Liehu, Anita; Liukkonen, Mikko; Nuotio, Tarja; Sandman, Olavi; Turkia, Jaana.

Acidification in Finland. ed. / Pekka Kauppi; Pia Anttila; Kaarle Kenttämies. Springer, 1990. p. 1071-1092.

Research output: Chapter in Book/Report/Conference proceedingChapter or book articleProfessional

TY - CHAP

T1 - Paleoecological Evaluation of the Recent Acidification of Susceptible Lakes in Finland

AU - Huttunen, Pertti

AU - Kenttämies, Kaarle

AU - Liehu, Anita

AU - Liukkonen, Mikko

AU - Nuotio, Tarja

AU - Sandman, Olavi

AU - Turkia, Jaana

PY - 1990

Y1 - 1990

N2 - The aims of this study were to reveal the causes of lake acidification and to study the acidification history and areal distribution of acidification of Finnish lakes. The 30 lakes selected for this study were mainly oligotrophic forest lakes. They do not represent statistically all lakes in Finland but are the most interesting, sensitive lakes. Estimates of inferred pH and alkalinity from sediment diatom assemblages were based on a calibration set of 92 lakes with surface sediment diatom assemblages and the corresponding chemistry of autumnal water samples. Of the studied 30 lakes, 43% had a significant recent decrease in alkalinity, 20% were naturally acidic, and 27% were with no acidification trends. Lakes with sediment with poorly preserved diatom frustules were 10% of the whole material. At all sites where recent acidification was recorded and the lake was deep enough, the proportion of planktonic diatoms decreased remarkably. In naturally acidic lakes, abundances of diatom plankton have also declined during the last century. In this study the chemical models used showed both larger and smaller acidification than the estimates from the palaeoecological approach. The recent acidification of small forest lakes is restricted to southern Finland where almost all acidic lakes have acidified since 1900. In central and northern Finland, on the other hand, the proportion of naturally acidic lakes is higher.

AB - The aims of this study were to reveal the causes of lake acidification and to study the acidification history and areal distribution of acidification of Finnish lakes. The 30 lakes selected for this study were mainly oligotrophic forest lakes. They do not represent statistically all lakes in Finland but are the most interesting, sensitive lakes. Estimates of inferred pH and alkalinity from sediment diatom assemblages were based on a calibration set of 92 lakes with surface sediment diatom assemblages and the corresponding chemistry of autumnal water samples. Of the studied 30 lakes, 43% had a significant recent decrease in alkalinity, 20% were naturally acidic, and 27% were with no acidification trends. Lakes with sediment with poorly preserved diatom frustules were 10% of the whole material. At all sites where recent acidification was recorded and the lake was deep enough, the proportion of planktonic diatoms decreased remarkably. In naturally acidic lakes, abundances of diatom plankton have also declined during the last century. In this study the chemical models used showed both larger and smaller acidification than the estimates from the palaeoecological approach. The recent acidification of small forest lakes is restricted to southern Finland where almost all acidic lakes have acidified since 1900. In central and northern Finland, on the other hand, the proportion of naturally acidic lakes is higher.

M3 - Chapter or book article

SN - 3-540-52213-1

SN - 0-387-52213-1

SP - 1071

EP - 1092

BT - Acidification in Finland

A2 - Kauppi, Pekka

A2 - Anttila, Pia

A2 - Kenttämies, Kaarle

PB - Springer

ER -

Huttunen P, Kenttämies K, Liehu A, Liukkonen M, Nuotio T, Sandman O et al. Paleoecological Evaluation of the Recent Acidification of Susceptible Lakes in Finland. In Kauppi P, Anttila P, Kenttämies K, editors, Acidification in Finland. Springer. 1990. p. 1071-1092