44
Vahtera E, Conley DJ, Gustafsson BG, Kuosa H, Pitkänen H, Savchuk OP, Tamminen T, Viitasalo
M, Voss M, Wasmund N, Wulff F (2007) Internal ecosystem feedbacks enhance nitrogen- fi xing
cyanobacteria blooms and complicate management in the Baltic Sea. AMBIO 36:186–194
Velthof GL, Lesschen JP, Webb J, Pietrzak S, Miatkowski Z, Pinto M, Kros J, Oenema O (2014)
The impact of the Nitrates Directive on nitrogen emissions from agriculture in the EU-27
during 2000–2008. Sci Total Environ 468–469:1225–1233
Wassmann P, Olli K (eds) (2006) Drainage basin nutrient inputs and eutrophication: an integrated
approach. University of Tromsø. Available from http://kodu.ut.ee/~olli/eutr
Wulff F, Humborg C, Andersen HE, Blicher-Mathiesen G, Czajkowski M, Elofsson K, FonnesbechWulff A, Hasler B, Hong B, Jansons V, Mörth CM, Smart JC, Smedberg E, Stålnacke P, Swaney
DP, Thodsen H, Was A, Zylicz T (2014) Reduction of Baltic Sea nutrient inputs and allocation
of abatement costs within the Baltic Sea catchment. AMBIO 43:11–25
Zillén L, Conley DJ, Andrén T, Andrén E, Björck S (2008) Past occurrences of hypoxia in the
Baltic Sea and the role of climate variability, environmental change and human impact. EarthSci Rev 91:77–92
M. Karlsson et al.
Vahtera E, Conley DJ, Gustafsson BG, Kuosa H, Pitkänen H, Savchuk OP, Tamminen T, Viitasalo
M, Voss M, Wasmund N, Wulff F (2007) Internal ecosystem feedbacks enhance nitrogen- fi xing
cyanobacteria blooms and complicate management in the Baltic Sea. AMBIO 36:186–194
Velthof GL, Lesschen JP, Webb J, Pietrzak S, Miatkowski Z, Pinto M, Kros J, Oenema O (2014)
The impact of the Nitrates Directive on nitrogen emissions from agriculture in the EU-27
during 2000–2008. Sci Total Environ 468–469:1225–1233
Wassmann P, Olli K (eds) (2006) Drainage basin nutrient inputs and eutrophication: an integrated
approach. University of Tromsø. Available from http://kodu.ut.ee/~olli/eutr
Wulff F, Humborg C, Andersen HE, Blicher-Mathiesen G, Czajkowski M, Elofsson K, FonnesbechWulff A, Hasler B, Hong B, Jansons V, Mörth CM, Smart JC, Smedberg E, Stålnacke P, Swaney
DP, Thodsen H, Was A, Zylicz T (2014) Reduction of Baltic Sea nutrient inputs and allocation
of abatement costs within the Baltic Sea catchment. AMBIO 43:11–25
Zillén L, Conley DJ, Andrén T, Andrén E, Björck S (2008) Past occurrences of hypoxia in the
Baltic Sea and the role of climate variability, environmental change and human impact. EarthSci Rev 91:77–92
M. Karlsson et al.