Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake

Shatwell, Tom; Köhler, Jan

doi:10.1002/lno.11002

Cited by 82 publications

(63 citation statements)

References 51 publications

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“…In their review of 89 control efforts McCrackin et al () did not find any significant differences in success from efforts to control P, N, or N + P, but variability was high, and few management programs have attempted to control N alone. Nevertheless, dual N and P control is beginning to be implemented with some success, either in experimental situations, or in entire systems (Baker et al, ; Elmgren & Larsson, ; McCrackin et al, ; Shatwell & Köhler, ). Agencies in the U.S. and Europe are drafting regulations to enforce dual nutrient control (EPA, ; Ferreira et al, ).…”

Section: Managing Nutrients In Complex and Linked Stream‐lake‐marine mentioning

confidence: 99%

Nutrients, eutrophication and harmful algal blooms along the freshwater to marine continuum

2019

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Agricultural, urban and industrial activities have dramatically increased aquatic nitrogen and phosphorus pollution (eutrophication), threatening water quality and biotic integrity from headwater streams to coastal areas world-wide. Eutrophication creates multiple problems, including hypoxic "dead zones" that reduce fish and shellfish production; harmful algal blooms that create taste and odor problems and threaten the safety of drinking water and aquatic food supplies; stimulation of greenhouse gas releases; and degradation of cultural and social values of these waters. Conservative estimates of annual costs of eutrophication have indicated $1 billion losses for European coastal waters and $2.4 billion for lakes and streams in the United States. Scientists have debated whether phosphorus, nitrogen, or both need to be reduced to control eutrophication along the freshwater to marine continuum, but many management agencies worldwide are increasingly opting for dual control. The unidirectional flow of water and nutrients through streams, rivers, lakes, estuaries and ultimately coastal oceans adds additional complexity, as each of these ecosystems may be limited by different factors. Consequently, the reduction of just one nutrient upstream to control eutrophication can allow the export of other nutrients downstream where they may stimulate algal production. The technology exists for controlling eutrophication, but many challenges remain for understanding and managing this global environmental problem.

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Section: Managing Nutrients In Complex and Linked Stream‐lake‐marine mentioning

confidence: 99%

Nutrients, eutrophication and harmful algal blooms along the freshwater to marine continuum

2019

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“…One reason for focussing on P rather than N is the belief that N fixation by certain cyanobacteria may allow an escape from N limitation (Schindler 1977). However, evidence is growing that N fixation is inadequate to overcome N limitation (Shatwell andKohler 2019, van Gerven et al 2019). A Policy Forum Review in Science concluded that amelioration of the negative impacts of nutrient enrichment should be made by control and reduction of both N and P (Conley et al 2009); more recent work supports this contention (Lewis et al 2011, Wurtsbaugh et al 2019.…”

Section: Implications Of Nutrient Limitation Status and Managementmentioning

confidence: 99%

Nitrogen and phosphorus limitation and the management of small productive lakes

et al. 2020

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Many inland waters are enriched with nutrients, causing deleterious effects to their ecology and the benefits they provide for society, but their effective management first requires identification of the nutrient(s) that limit algal production. Concentrations of nutrients and chlorophyll a (Chl-a) were used to assess nutrient limitation seasonally at 17 meres over 2 time periods: historic (2005-2009; 1995-1998 at one site) and contemporary (2014-2018). Different approaches were used to assess nutrient limitation because they reflect different aspects of nutrient availability and their conversion into biomass. In the historic period, 3 meres were phosphorus (P) limited, 3 nitrogen (N) limited, 5 co-limited; the remaining 6 meres were not nutrient limited. For this period, ecological status assessed using phytoplankton Chl-a was only at good or high ecological status (sensu the Water Framework Directive) at 2 sites. The contemporary period was slightly improved, with 4 sites at good status. At the sites that failed to meet good ecological status, the required reduction in P concentration was least in P-limited sites and, conversely, the reduction in N was least in N-limited sites, suggesting that remediation by nutrient reduction would be most efficient if it was targeted using site-specific information. Even in primarily P-limited sites, once input of P has been reduced, further ecological benefit of reducing N at targeted sites should be explored.

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“…After very high nutrient loadings into Lake Müggelsee during the 20th century peaking in the 1970s and 1980s, nutrient loads started dropping steeply in the beginning of the 1990s and continued reducing after year 2000 [21]. In parallel with the high nutrient loading, almost all macrophytes disappeared from Lake Müggelsee in the 1970s.…”

Section: Studied Lake System and Impact Of Bank Filtrationmentioning

confidence: 99%

Phosphorus Availability and Growth of Benthic Primary Producers in Littoral Lake Sediments: Are Differences Linked to Induced Bank Filtration?

Gillefalk

Herzog

Hilt

2019

Water

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Submerged macrophytes and periphyton are benthic primary producers that play an important role for several ecosystem functions of lakes. Their growth often depends on the availability of phosphorus (P) in sediments and overlying water. This P availability is assumed to potentially be affected by induced bank filtration (IBF), a cost-effective method for drinking water production. In this study, we tested whether littoral sediments sampled at sites with high and low influence of IBF in a temperate eutrophic lake used for bank filtration since more than 100 years affects periphyton and macrophyte growth. Sediments differed in aerobic desorbed water-soluble phosphorus (P H2O ) and iron (Fe) content and the growth of macrophytes in sediments with a high impact of IBF was lower compared to sediments with low impact of IBF. We also found that P addition to the nutrient solution increased periphyton growth and that periphyton limited macrophyte growth. While these results point to a potential impact of IBF on P availability in sediments that can cascade to benthic primary producers, we could not prove mechanistic links between high rates of IBF and the lower macrophyte growth. Additional research to assure a sustainable application of this valuable drinking water production method is therefore needed.

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Decreased nitrogen loading controls summer cyanobacterial blooms without promoting nitrogen‐fixing taxa: Long‐term response of a shallow lake

Cited by 82 publications

References 51 publications

Nutrients, eutrophication and harmful algal blooms along the freshwater to marine continuum

Nutrients, eutrophication and harmful algal blooms along the freshwater to marine continuum

Nitrogen and phosphorus limitation and the management of small productive lakes

Phosphorus Availability and Growth of Benthic Primary Producers in Littoral Lake Sediments: Are Differences Linked to Induced Bank Filtration?

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