---
_id: '12237'
abstract:
- lang: eng
  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.'
author:
- first_name: Tom
  full_name: Shatwell, Tom
  id: '86424'
  last_name: Shatwell
  orcid: 0000-0002-4520-7916
- first_name: Jan
  full_name: Köhler, Jan
  last_name: Köhler
citation:
  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>'
  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>'
  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>.'
  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>.'
  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>, .'
  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'
  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).'
  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).
  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.'
  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).'
date_created: 2024-12-08T20:29:40Z
date_updated: 2024-12-09T10:18:21Z
department:
- _id: DEP8022
doi: 10.1002/lno.11002
extern: '1'
intvolume: '        64'
issue: S1
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://doi.org/10.1002/lno.11002
oa: '1'
place: Hoboken, NJ
publication: Limnology and Oceanography
publication_identifier:
  eissn:
  - 1939-5590
  issn:
  - 0024-3590
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: 'Decreased nitrogen loading controls summer cyanobacterial blooms without promoting
  nitrogen‐fixing taxa: Long‐term response of a shallow lake'
type: scientific_journal_article
user_id: '83781'
volume: 64
year: '2018'
...