Biological Nitrogen Fixation Prevents the Response of a Eutrophic Lake to Reduced Loading of Nitrogen: Evidence from a 46-Year Whole-Lake Experiment

@article{Higgins2017BiologicalNF,
  title={Biological Nitrogen Fixation Prevents the Response of a Eutrophic Lake to Reduced Loading of Nitrogen: Evidence from a 46-Year Whole-Lake Experiment},
  author={Scott N. Higgins and Michael J. Paterson and Robert E. Hecky and David W. Schindler and Jason J. Venkiteswaran and David L. FindlayD.L. Findlay},
  journal={Ecosystems},
  year={2017},
  volume={21},
  pages={1088-1100}
}
AbstractA whole-ecosystem experiment in Lake 227 (L227) at the Experimental Lakes Area, ongoing since 1969, examined the roles of carbon (C), nitrogen (N), and phosphorus (P) in controlling eutrophication. During 2011, we conducted a series of sub-experiments and more intensive monitoring to improve estimates of N fixation and its ability to meet algal growth demands in the decades following the cessation of artificial N loading, while maintaining long-term high artificial P loading… Expand

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References

SHOWING 1-10 OF 54 REFERENCES
Recent Changes of N2-Fixation in Lake 227 in Response to Reduction of the N:P Loading Ratio
TLDR
Five years of phytoplankton nutrient-status measurements, together with estimates of N2-fixation before and after lowering the N:P loading ratio, verified the importance of this ratio in producing blooms of N1-fixing cyanobacteria. Expand
Nitrogen fixation may not balance the nitrogen pool in lakes over timescales relevant to eutrophication management
We explored multiyear linear trends in nutrient concentrations, nitrogen (N):phosphorus (P) ratio, and phytoplankton biomass within the 37-yr, whole-ecosystem nutrient enrichment experiment in LakeExpand
Eutrophication of lakes cannot be controlled by reducing nitrogen input: Results of a 37-year whole-ecosystem experiment
TLDR
Reducing nitrogen inputs increasingly favored nitrogen-fixing cyanobacteria as a response by the phytoplankton community to extreme seasonal nitrogen limitation, and the lake remained highly eutrophic, despite showing indications of extreme nitrogen limitation seasonally. Expand
The effectiveness of cyanobacteria nitrogen fixation: Review of bench top and pilot scale nitrogen removal studies and implications for nitrogen removal programs
TLDR
One of the primary goals of eutrophication management of freshwater systems is to lower the risk of cyanobacterial blooms by placing controls on phosphorus discharge from point sources, but several researchers have questioned the predominance of the P management paradigm, arguing that dual nitrogen (N) and P controls would be more effective at preventing cyanobacteria blooms than P controls alone. Expand
Pelagic C:N:P Stoichiometry in a Eutrophied Lake: Responses to a Whole-Lake Food-Web Manipulation
TLDR
The results show that strong effects of food-web structure can occur in eutrophic lakes and that stoichiometric mechanisms play a potentially important role in generating these effects. Expand
Nitrogen Fixation in Canadian Precambrian Shield Lakes
TLDR
Generally, algal nitrogen fixation occurred in Shield lakes that were subject to total N:total P loading ratios (wt/wt) of less than approximately 10, which suggests that in these lakes phosphorus removal from loading is the best technique for eutrophication abatement and that nitrogen removal, when applied by itself, may be detrimental because it could encourage bloom formation of nitrogen fixing blue-green algae. Expand
N2 fixation exceeds internal nitrogen loading as a phytoplankton nutrient source in perpetually nitrogen-limited reservoirs
TLDR
It is suggested that, even though the annual cycle of ecosystem N inputs via N2 fixation has occurred over many years or decades in these reservoirs, reactive N accumulation has not been sufficient to alleviate seasonal N deficiency and lead to perpetual P limitation of phytoplankton. Expand
The effects of Daphnia on nutrient stoichiometry and filamentous cyanobacteria: a mesocosm experiment in a eutrophic lake
TLDR
It is concluded that Daphnia did not cause reductions in cyanobacteria by altering the N : P ratio of available nutrients, and changes in nutrient cycling consistent with other aspects of stoichiometric theory. Expand
Towards an ecological understanding of biological nitrogen fixation
TLDR
Despite the many groups of organisms capable of fixing N, and the very different ecosystems in which the process is important, it is suggested that common controls provide a foundation for the development of regional and global models that incorporate ecological controls of biological N fixation. Expand
Comment: Lake 227 shows clearly that controlling inputs of nitrogen will not reduce or prevent eutrophication of lakes
The conclusion from our earlier paper, that decreasing nitrogen (N) inputs to lakes does not substantially reduce symptoms of eutrophication (Schindler et al. 2008), was recently challenged by ScottExpand
...
1
2
3
4
5
...