Meta-analysis of lotic nutrient amendment experiments: detecting and quantifying subtle responses

Francoeur, Steven N.

doi:10.2307/1468034

Cited by 225 publications

(235 citation statements)

References 30 publications

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“…Results from previous studies suggest that autotrophic biofilms are stoichiometrically plastic since biomass N : P for a given biofilm composition can vary with environmental conditions (FRANCOEUR, 2001;TANK and DODDS, 2003;DODDS et al, 2004) while elemental composition of heterotrophic bacteria and fungi are more homeostatic (STERNER and ELSER, 2002;MAKINO et al, 2003). However, a few studies have observed limited elemental plasticity of aquatic bacteria (e.g., TEZUKA, 1990;CHRZANOWSKI and KYLE, 1996), and there is some evidence that fungi respond to low phosphorus by storing phosphorus in polyphosphate granules, reducing the phosphorus content of cell walls, and partially replacing phospholipid with phosphorus-free lipid (BEEVER and BURNS, 1980;JENNINGS, 1995).…”

mentioning

confidence: 99%

Nutrient Uptake and Mineralization during Leaf Decay in Streams – a Model Simulation

Webster

Newbold

Thomas

et al. 2009

International Review of Hydrobiology

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We developed a stoichiometrically explicit computer model to examine how heterotrophic uptake of nutrients and microbial mineralization occurring during the decay of leaves in streams may be important in modifying nutrient concentrations. The simulations showed that microbial uptake can substantially decrease stream nutrient concentrations during the initial phases of decomposition, while mineralization may produce increases in concentrations during later stages of decomposition. The simulations also showed that initial nutrient content of the leaves can affect the stream nutrient concentration dynamics and determine whether nitrogen or phosphorus is the limiting nutrient. Finally, the simulations suggest a net retention (uptake > mineralization) of nutrients in headwater streams, which is balanced by export of particulate organic nutrients to downstream reaches. Published studies support the conclusion that uptake can substantially change stream nutrient concentrations. On the other hand, there is little published evidence that mineralization also affects nutrient concentrations. Also, there is little information on direct microbial utilization of nutrients contained in the decaying leaves themselves. Our results suggest several directions for research that will improve our understanding of the complex relationship between leaf decay and nutrient dynamics in streams.

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mentioning

confidence: 99%

Nutrient Uptake and Mineralization during Leaf Decay in Streams – a Model Simulation

Webster

Newbold

Thomas

et al. 2009

International Review of Hydrobiology

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“…Some existing paradigms identify N as the primary limiting nutrient in terrestrial and marine ecosystems and P as the main limiting nutrient in lakes (Schindler 1977;Vitousek and Howarth 1991;Howarth and Marino 2006). Recent works have showed that N and P limitation are equivalent in lakes (Downing et al 1999;Francoeur 2001;Elser et al 2007), however, and the patterns of ecological nutrient limitation can be shifted (Elser et al 2009). Further research is therefore needed to study the effects of bivalves on N cycling, which will be the main focus of our future experiments.…”

Section: Sampling and Analysismentioning

confidence: 99%

Effects of different aquaculture methods for introduced bivalves (Hyriopsis cumingii) on seston removal and phosphorus balance at the water–sediment interface

Long

Jian

et al. 2018

Journal of Freshwater Ecology

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A field simulation experiment was conducted to test the hypothesis that altering bivalve aquaculture methods could promote the restoration of eutrophic waterbodies. We used three aquaculture methods -benthic aquaculture, suspended aquaculture, and macrophytes/bivalve combined aquaculture -to (1) investigate their effects on seston removal through monitoring water turbidity, pelagic and benthic algae, and (2) compare their impacts on the phosphorus (P) balance at the water-sediment interface by determining different forms of P contents in the water and sediments. The results showed that the seston removal effects did not differ significantly among these three aquaculture methods. Furthermore, the changes of all investigated P parameters in the water and sediments showed that P release occurred in the benthic and suspended aquaculture treatments. The suspended aquaculture strengthened the regeneration of P from sediments into the water compared with the benthic aquaculture. In addition, the results of a principal component and classification analysis showed that macrophytes/bivalve combined aquaculture promoted the maintenance of restoration effects and P balance at the water-sediment interface. In conclusion, benthic aquaculture coupled with replanting submerged macrophytes is a better choice for water managers when using biomanipulation of bivalves to remedy eutrophic waterbodies.

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“…Its extensive use in lakes and streams has led to synthesis of broad patterns regarding benthic algal nutrient limitation in these habitats (Borchardt 1996, Francoeur 2001. NDS have been used much less frequently in nonlittoral wetlands, preventing similar robust synthesis of wetland benthic algal nutrient limitation.…”

Section: Applying the Nds Bioassay To Wetland Habitatsmentioning

confidence: 99%

“…Such experiments can be time consuming and labor intensive. The average NDS experiment requires 2 to 8 wk to complete (Biggs and Kilroy 2000), and 3 to 4 wk of exposure typically are needed to allow sufficient time for algal growth (Francoeur et al 1999, Francoeur 2001. In addition, the biomass, community structure, or physiological assays typically applied to such experiments require destructive sampling of algal communities on NDS.…”

mentioning

confidence: 99%

Active fluorometry improves nutrient-diffusing substrata bioassay

Whorley¹,

Francoeur²

2013

Freshwater Science

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Meta-analysis of lotic nutrient amendment experiments: detecting and quantifying subtle responses

Cited by 225 publications

References 30 publications

Nutrient Uptake and Mineralization during Leaf Decay in Streams – a Model Simulation

Nutrient Uptake and Mineralization during Leaf Decay in Streams – a Model Simulation

Effects of different aquaculture methods for introduced bivalves (Hyriopsis cumingii) on seston removal and phosphorus balance at the water–sediment interface

Active fluorometry improves nutrient-diffusing substrata bioassay

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