{"extern":"1","user_id":"83781","issue":"S1","author":[{"id":"86424","full_name":"Shatwell, Tom","orcid":"0000-0002-4520-7916","last_name":"Shatwell","first_name":"Tom"},{"full_name":"Köhler, Jan","first_name":"Jan","last_name":"Köhler"}],"publisher":"Wiley","doi":"10.1002/lno.11002","department":[{"_id":"DEP8022"}],"abstract":[{"text":"The effectiveness of controlling nitrogen (N) to manage lake eutrophication is debated. Long-term, whole-lake case studies are required to determine whether diazotrophic cyanobacteria can fix sufficient N to offset a reduction of N-inputs. We document the recovery of shallow, productive Lake Müggelsee (Germany) over 37 yr (sampling interval 1–2 weeks) during a decrease of N and phosphorus (P) loading of 79% and 69%, respectively. Nitrogen concentrations in the lake responded immediately to loading reduction whereas P concentrations remained elevated for about 20 yr. Total nitrogen (TN) in the lake was always lower than TN in the inflow. Accordingly, estimated denitrification and N-burial rates substantially exceeded N2 fixation rates in the long term. Phosphorus was growth limiting in spring whereas N was clearly limiting in summer due to high sediment P-release. TN : TP ratios, normalized to phytoplankton biovolume by regression, were 25.5 (weight) in spring and 3.3 in summer. During the study period, dissolved inorganic N (DIN) concentrations in summer decreased and the duration of low DIN concentrations increased by ca. 100 d. The biovolume of cyanobacteria and total phytoplankton decreased by 89% and 76%, respectively. The proportion of N2-fixing cyanobacteria during summer decreased from 36% to 14% of the total phytoplankton biovolume. The total concentration of heterocysts and estimated total N2 fixation did not change over time. In the long term, decreasing N-inputs effectively controlled summer cyanobacteria including N2-fixing taxa, which did not compensate for the N-deficit. A P-only control strategy would not have been as successful.","lang":"eng"}],"publication":"Limnology and Oceanography","publication_identifier":{"eissn":["1939-5590"],"issn":["0024-3590"]},"volume":64,"oa":"1","language":[{"iso":"eng"}],"title":"Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake","date_updated":"2024-12-09T10:18:21Z","date_created":"2024-12-08T20:29:40Z","main_file_link":[{"url":"https://doi.org/10.1002/lno.11002","open_access":"1"}],"status":"public","citation":{"ieee":"T. Shatwell and J. Köhler, “Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake,” <i>Limnology and Oceanography</i>, vol. 64, no. S1, 2018, doi: <a href=\"https://doi.org/10.1002/lno.11002\">10.1002/lno.11002</a>.","mla":"Shatwell, Tom, and Jan Köhler. “Decreased Nitrogen Loading Controls Summer Cyanobacterial Blooms without Promoting Nitrogen‐fixing Taxa: Long‐term Response of a Shallow Lake.” <i>Limnology and Oceanography</i>, vol. 64, no. S1, 2018, <a href=\"https://doi.org/10.1002/lno.11002\">https://doi.org/10.1002/lno.11002</a>.","short":"T. Shatwell, J. Köhler, Limnology and Oceanography 64 (2018).","chicago":"Shatwell, Tom, and Jan Köhler. “Decreased Nitrogen Loading Controls Summer Cyanobacterial Blooms without Promoting Nitrogen‐fixing Taxa: Long‐term Response of a Shallow Lake.” <i>Limnology and Oceanography</i> 64, no. S1 (2018). <a href=\"https://doi.org/10.1002/lno.11002\">https://doi.org/10.1002/lno.11002</a>.","bjps":"<b>Shatwell T and Köhler J</b> (2018) Decreased Nitrogen Loading Controls Summer Cyanobacterial Blooms without Promoting Nitrogen‐fixing Taxa: Long‐term Response of a Shallow Lake. <i>Limnology and Oceanography</i> <b>64</b>.","apa":"Shatwell, T., &#38; Köhler, J. (2018). Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake. <i>Limnology and Oceanography</i>, <i>64</i>(S1). <a href=\"https://doi.org/10.1002/lno.11002\">https://doi.org/10.1002/lno.11002</a>","ufg":"<b>Shatwell, Tom/Köhler, Jan</b>: Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake, in: <i>Limnology and Oceanography</i> 64 (2018), H. S1.","havard":"T. Shatwell, J. Köhler, Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake, Limnology and Oceanography. 64 (2018).","chicago-de":"Shatwell, Tom und Jan Köhler. 2018. Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake. <i>Limnology and Oceanography</i> 64, Nr. S1. doi:<a href=\"https://doi.org/10.1002/lno.11002\">10.1002/lno.11002</a>, .","van":"Shatwell T, Köhler J. Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake. Limnology and Oceanography. 2018;64(S1).","ama":"Shatwell T, Köhler J. Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake. <i>Limnology and Oceanography</i>. 2018;64(S1). doi:<a href=\"https://doi.org/10.1002/lno.11002\">10.1002/lno.11002</a>","din1505-2-1":"<span style=\"font-variant:small-caps;\">Shatwell, Tom</span> ; <span style=\"font-variant:small-caps;\">Köhler, Jan</span>: Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake. In: <i>Limnology and Oceanography</i> Bd. 64. Hoboken, NJ, Wiley (2018), Nr. S1"},"type":"scientific_journal_article","place":"Hoboken, NJ","quality_controlled":"1","publication_status":"published","_id":"12237","year":"2018","intvolume":"        64"}