Active fluorometry improves nutrient-diffusing substrata bioassay

Whorley, Sarah B.; Francoeur, Steven N.

doi:10.1899/11-178.1

Cited by 13 publications

(6 citation statements)

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“…This article is protected by copyright. All rights reserved Nutrient (i.e., N and P) availability can regulate the biomass and production of algae, fungi, and bacteria (Gulis & Suberkropp, 2003a;2003b;Scott, Doyle, & Filstrup, 2005;Whorley & Francoeur, 2013;Cooper, Costello, Francoeur, & Lamberti, 2016;Gulis et al, 2017), and affect the decomposition of plant litter (Neely & Davis, 1985;Ferreira et al, 2014;Manning et al, 2016). High-nutrient plant litter decomposes faster than low-nutrient litter, and the stimulatory effect of dissolved nutrients on litter decomposition rates is lower for high-nutrient litter (Manning et al, 2016), indicating that litter itself can be an important source of nutrients for decomposers.…”

Section: Author Manuscriptmentioning

confidence: 99%

Temporal and stoichiometric patterns of algal stimulation of litter‐associated heterotrophic microbial activity

et al. 2019

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Section: Author Manuscriptmentioning

confidence: 99%

Temporal and stoichiometric patterns of algal stimulation of litter‐associated heterotrophic microbial activity

et al. 2019

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“…Wellnitz, Rader, & Ward, ), and fungal biomass (Tank & Dodds, ). Functional response variables are measured much more infrequently, but NDS studies have addressed the influence of nutrient inputs on gross primary production (GPP; Reisinger, Tank, & Dee, ), respiration (Hoellein, Tank, Kelly, & Rosi‐Marshall, ), photosynthetic efficiency (Whorley & Francoeur, ), and N‐fixation (Marcarelli & Wurtsbaugh, ).…”

Section: Introductionmentioning

confidence: 99%

Influence of experimental, environmental, and geographic factors on nutrient‐diffusing substrate experiments in running waters

2017

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2. We surveyed the literature and extracted data for algal biomass effect sizes and a suite of covariates across a total of 649 experiments. We built meta-regression models to identify important controls on NDS results and to gain insights about algal nutrient limitation patterns over space and time. We also reviewed potential mechanisms for the reported result that NDS N and P treatments can inhibit algal growth. 4. Most experimental and environmental variables that were statistically significant in the meta-regression models produced very low R 2 index values, indicating that the models explained little variation in among-site effect sizes. Spatial factors including stream order, ecoregion, and climate classification had the highest R 2 index values, but these models still produced a large amount of unexplained variance.5. In light of these findings, we provide recommendations for improving NDS experimental design and pursuing future research avenues using NDS. We also

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“…Fast Repetition Rate (FRR), evolved from Pump-and-Probe, induces fluorescence transiently by initially delivering a series of subsaturating high intensity pulses followed by a series of more widely spaced "probing" flashlets that examine the subsequent fluorescence decay [71]. Compared to PAM and P&P protocols, FRR has been shown especially appropriate for high frequency measurements in situ [80][81][82]. The basic theory and applications in aquatics can be seen in Suggett et al [75].…”

Section: Excitation Methodmentioning

confidence: 99%

Development ofIn SituSensors for Chlorophyll Concentration Measurement

Zeng

2015

Journal of Sensors

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Chlorophyll fluorescence measurement is a sensitive and effective method to quantify and analyze freshwater and sea water phytoplanktonin situ. Major improvements in optical design, electronic technology, and calibration protocol have increased the accuracy and reliability of the fluorometer. This review briefly describes the improvement of probe design, excitation light sources, detectors, and calibrations ofin situfluorometers. Firstly, various optical designs for increasing the efficiency of fluorescence measurement are discussed. Next, the development of electronic technology to meet and improvein situmeasurement, including various light sources, detectors, and corresponding measurement protocols, is described. In addition, various calibration materials, procedures, and methods are recommended for different kinds of water. The conclusion discusses key trends and future perspectives forin situfluorescence sensors.

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Active fluorometry improves nutrient-diffusing substrata bioassay

Cited by 13 publications

References 40 publications

Temporal and stoichiometric patterns of algal stimulation of litter‐associated heterotrophic microbial activity

Temporal and stoichiometric patterns of algal stimulation of litter‐associated heterotrophic microbial activity

Influence of experimental, environmental, and geographic factors on nutrient‐diffusing substrate experiments in running waters

Development ofIn SituSensors for Chlorophyll Concentration Measurement

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