Nutrient limitation of phytoplankton growth in central plains reservoirs, USA

Dzialowski, Andrew R.; Wang, Shih-Hsien; Lim, Niang-Choo; Spotts, William W.; Huggins, Donald G.

doi:10.1093/plankt/fbi034

Cited by 98 publications

(78 citation statements)

References 27 publications

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“…This was particularly true at the upstream sites that had lower DIN and higher chlorophyll a concentrations. Dzialowski et al (2005) suggested that reservoirs were generally N limited if the water column had TN:TP ratios (molar) <18, co-limited by N and P if TN:TP ratios were between 20 and 46, and P limited if TN:TP ratio >65. This was not the case in Wivenhoe Reservoir, however, where N limitation was seen at sites with TN:TP molar ratios >40.…”

Section: Discussionmentioning

confidence: 99%

“…Contrary to the concept of a single limiting nutrient, the concept of N and P co-limitation has been put forward by various researchers Wurtsbaugh 2008, Sterner 2008). Co-limitation of N and P was found in Lake Pátzcuaro in Mexico (Bernal-Brooks et al 2003); in 63% of 30 small upland lakes in Cumbria, Wales, Scotland, and Northern Ireland (Maberly et al 2002); in 2 warm temperate Texan reservoirs (Sterner andGrover 1998, Grover et al 1999); and in reservoirs in Kansas, USA (Dzialowski et al 2005). In a study of 8 mountain lakes of central Colorado, 79% of all observed instances of limitation indicated that N was the most frequently limiting nutrient, either alone or in combination with P (Morris and Lewis 1988).…”

Section: Introductionmentioning

confidence: 98%

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Assessing nutrient limitation in a subtropical reservoir

Muhid

Burford

2012

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There is debate about the relative importance of controlling anthropogenic nitrogen (N) versus phosphorus (P) inputs to limit algal growth in lakes and reservoirs. Our study examined nutrient responses in a subtropical reservoir using short-term algal bioassays on 3 occasions, once during the austral winter and twice during the austral summer. Measurement of photosynthetic yield (Fv/Fm) was used to determine the response to nutrient addition. For the 2 summer sampling occasions, the photosynthetic yields of the N+P treatments were significantly higher than the control. At some sites and on some occasions there was a response to P or N alone, but there was no consistent pattern. The one winter sampling occasion had no response to nutrient addition. Overall, the magnitude of the photosynthetic yield of algal samples correlated with nitrate/nitrite (NO 2 − /NO 3 − ) and soluble reactive phosphorus (SRP) concentrations, but not with ammonium (NH 4 + ), or dissolved organic N (DON) or P (DOP), despite relatively high concentrations of DON. Therefore we concluded that both N and P co-limited the growth of phytoplankton in the 2 austral summer sampling occasions. This contrasted with high N:P ratios and low P concentrations observed, which suggested that the reservoir was most likely to be P limited. This study highlights the importance of determining algal responses to nutrients and measures nutrient concentrations and ratios to determine whether N or P should be controlled to prevent algal blooms.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Assessing nutrient limitation in a subtropical reservoir

Muhid

Burford

2012

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“…Furthermore, historical data suggest an increasing trend in TP loading at the reservoir (Jones and Barnes 2005) that has caused a shift in nutrient limitation ( Table 2). The mean summer TN:TP ratio of 18 indicates a co-limitation of N and P and a shift toward N-limiting conditions (Elser et al 1990, Guildford and Hecky 2000, Dzialowski et al 2005. A decrease in N/P ratio develops with increasing eutrophication and can be related to higher P load from the watershed (Lijklema 1994).…”

Section: Discussionmentioning

confidence: 99%

“…This finding is of great consequence for the management of this reservoir because N-limiting conditions produce blooms of green and blue-green algae that can generate toxins and obnoxious taste and odor compounds (Havens 1995, Havens et al 1996, Johnston and Jacoby 2003. Decreasing N inputs, however, might not decrease cyanobacteria growth in N-limited systems (Scheffer 2004), and management of both N and P is necessary to control production of cyanobacteria (Dzialowski et al 2005). Current management practices in the reservoir watershed are limited to only minimum tillage agriculture; use of other strategies such as buffer strips, livestock fencing, use of constructed wetlands at the reservoir inlets and in-lake management practices have not been implemented.…”

Section: Comparison To Lakes and Reference Conditions Of Ecoregion 55mentioning

confidence: 99%

Water quality assessment and ecoregional comparison of a reservoir in east-central Indiana

Popovičová

2009

Lake and Reservoir Management

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“…Development of effective lake and watershed management strategies for Lake Chivero will be determined by assessing which nutrient limits phytoplankton growth, especially the predominance of cyanobacteria. Phosphorus has been considered to be the primary nutrient limiting phytoplankton growth in freshwater ecosystems and management efforts have focused on controlling phosphorus loading (Dzialowski et al, 2005). Lake Chivero, which receives high loadings of nitrogen and phosphorus (Nhapi, 2004), has a relatively low total nitrogen to total phosphorus (TN:TP) ratio.…”

Section: Introductionmentioning

confidence: 99%

Nitrate-induced changes and effect of varying total nitrogen to total phosphorus ratio on the phytoplankton community in Lake Chivero, Zimbabwe: Microcosm experiments

Mhlanga

2012

WSA

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Microcosm experiments were conducted to assess nitrate-induced changes and the effect of varying the ratio of total nitrogen to total phosphorus (TN:TP) on the winter and late summer phytoplankton communities in Lake Chivero, Zimbabwe. In both winter and summer, nitrate addition altered species composition from a cryptophyte-dominated to a chlorophytedominated assemblage and increased chlorophyll a concentration and total algal biomass. The shift in algal dominance and increase in chlorophyll a concentration and total algal biomass also occurred in the control showing that isolation from allogenic processes like turbulence had an effect on phytoplankton structure. Microcystis aeruginosa, a common cyanobacterium in Lake Chivero, did not assume dominance in any of the treatments. From an application perspective it is interesting that varying nitrate loadings in microcosms favoured chlorophytes rather than increasing undesirable cyanobacteria. Nutrient manipulation can be used as a management option to avoid cyanobacteria occurrence, by maintaining either cryptophytes or chlorophytes. However, the practicality of such an intervention needs to be assessed.

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Nutrient limitation of phytoplankton growth in central plains reservoirs, USA

Cited by 98 publications

References 27 publications

Assessing nutrient limitation in a subtropical reservoir

Assessing nutrient limitation in a subtropical reservoir

Water quality assessment and ecoregional comparison of a reservoir in east-central Indiana

Nitrate-induced changes and effect of varying total nitrogen to total phosphorus ratio on the phytoplankton community in Lake Chivero, Zimbabwe: Microcosm experiments

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