Long-term trends in eutrophication and nutrients in the coastal zone

Anne-Marie Clarke; Kaarina Weckström; Daniel Conley; N. John Anderson; Finn Adser; Elinor Andrén; Victor de Jonge; Marianne Ellegaard; S. Juggins; P. Kauppila; A. Korhola; Nina Steenberg Reuss; R. J. Telford; S. Vaalgamaa

Long-term trends in eutrophication and nutrients in the coastal zone

Anne-Marie Clarke, Kaarina Weckström, Daniel Conley, N. John Anderson, Finn Adser, Elinor Andrén, Victor de Jonge, Marianne Ellegaard, S. Juggins, P. Kauppila, A. Korhola, Nina Steenberg Reuss, R. J. Telford, S. Vaalgamaa

Freshwater Biology

66 Citations (Scopus)

Abstract

We used high-resolution paleoecological records of environmental change to study the rate and magnitude of

eutrophication over the last century in two contrasting coastal ecosystems. A multiproxy approach using geochemical

and biological indicators and diatom-based transfer functions provides a long-term perspective on changes in nutrient

concentrations and the corresponding biological and sedimentary responses. In Roskilde Fjord, Denmark, total

nitrogen (TN) increased 85% during the last century, with the most rapid increase occurring after the 1950s,

corresponding to the postwar increase in N fertilizer use. In Laajalahti Bay, an urban embayment near Helsinki,

Finland, total dissolved nitrogen (TDN) increased with growing wastewater inputs and decreased with the remedial

actions taken to reduce these discharges. These changes are small relative to the order of magnitude increases in

nutrient loading that have occurred in northwestern Europe, where the dissolved inorganic nitrogen (DIN) load has

increased more than threefold in certain areas.

Original language	English
Journal	Limnology and Oceanography
Volume	51
Issue number	1, part 2
Pages (from-to)	385-397
ISSN	0024-3590
Publication status	Published - 2006

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http://www.aslo.org/lo/toc/vol_51/issue_1_part_2/0385.pdf

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Clarke, A-M., Weckström, K., Conley, D., Anderson, N. J., Adser, F., Andrén, E., de Jonge, V., Ellegaard, M., Juggins, S., Kauppila, P., Korhola, A., Reuss, N. S., Telford, R. J., & Vaalgamaa, S. (2006). Long-term trends in eutrophication and nutrients in the coastal zone. Limnology and Oceanography, 51(1, part 2), 385-397. http://www.aslo.org/lo/toc/vol_51/issue_1_part_2/0385.pdf

Clarke, A-M, Weckström, K, Conley, D, Anderson, NJ, Adser, F, Andrén, E, de Jonge, V, Ellegaard, M, Juggins, S, Kauppila, P, Korhola, A, Reuss, NS, Telford, RJ & Vaalgamaa, S 2006, 'Long-term trends in eutrophication and nutrients in the coastal zone', Limnology and Oceanography, vol. 51, no. 1, part 2, pp. 385-397. <http://www.aslo.org/lo/toc/vol_51/issue_1_part_2/0385.pdf>

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title = "Long-term trends in eutrophication and nutrients in the coastal zone",

abstract = "We used high-resolution paleoecological records of environmental change to study the rate and magnitude ofeutrophication over the last century in two contrasting coastal ecosystems. A multiproxy approach using geochemicaland biological indicators and diatom-based transfer functions provides a long-term perspective on changes in nutrientconcentrations and the corresponding biological and sedimentary responses. In Roskilde Fjord, Denmark, totalnitrogen (TN) increased 85% during the last century, with the most rapid increase occurring after the 1950s,corresponding to the postwar increase in N fertilizer use. In Laajalahti Bay, an urban embayment near Helsinki,Finland, total dissolved nitrogen (TDN) increased with growing wastewater inputs and decreased with the remedialactions taken to reduce these discharges. These changes are small relative to the order of magnitude increases innutrient loading that have occurred in northwestern Europe, where the dissolved inorganic nitrogen (DIN) load hasincreased more than threefold in certain areas.",

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T1 - Long-term trends in eutrophication and nutrients in the coastal zone

AU - Clarke, Anne-Marie

AU - Weckström, Kaarina

AU - Conley, Daniel

AU - Anderson, N. John

AU - Adser, Finn

AU - Andrén, Elinor

AU - de Jonge, Victor

AU - Ellegaard, Marianne

AU - Juggins, S.

AU - Kauppila, P.

AU - Korhola, A.

AU - Reuss, Nina Steenberg

AU - Telford, R. J.

AU - Vaalgamaa, S.

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N2 - We used high-resolution paleoecological records of environmental change to study the rate and magnitude ofeutrophication over the last century in two contrasting coastal ecosystems. A multiproxy approach using geochemicaland biological indicators and diatom-based transfer functions provides a long-term perspective on changes in nutrientconcentrations and the corresponding biological and sedimentary responses. In Roskilde Fjord, Denmark, totalnitrogen (TN) increased 85% during the last century, with the most rapid increase occurring after the 1950s,corresponding to the postwar increase in N fertilizer use. In Laajalahti Bay, an urban embayment near Helsinki,Finland, total dissolved nitrogen (TDN) increased with growing wastewater inputs and decreased with the remedialactions taken to reduce these discharges. These changes are small relative to the order of magnitude increases innutrient loading that have occurred in northwestern Europe, where the dissolved inorganic nitrogen (DIN) load hasincreased more than threefold in certain areas.

AB - We used high-resolution paleoecological records of environmental change to study the rate and magnitude ofeutrophication over the last century in two contrasting coastal ecosystems. A multiproxy approach using geochemicaland biological indicators and diatom-based transfer functions provides a long-term perspective on changes in nutrientconcentrations and the corresponding biological and sedimentary responses. In Roskilde Fjord, Denmark, totalnitrogen (TN) increased 85% during the last century, with the most rapid increase occurring after the 1950s,corresponding to the postwar increase in N fertilizer use. In Laajalahti Bay, an urban embayment near Helsinki,Finland, total dissolved nitrogen (TDN) increased with growing wastewater inputs and decreased with the remedialactions taken to reduce these discharges. These changes are small relative to the order of magnitude increases innutrient loading that have occurred in northwestern Europe, where the dissolved inorganic nitrogen (DIN) load hasincreased more than threefold in certain areas.

M3 - Journal article

SN - 0024-3590

VL - 51

SP - 385

EP - 397

JO - Limnology and Oceanography

JF - Limnology and Oceanography

IS - 1, part 2

ER -

Long-term trends in eutrophication and nutrients in the coastal zone

Abstract

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