Empirical analysis of zooplankton filtering and feeding rates1

Peters, Robert H.; Downing, John A.

doi:10.4319/lo.1984.29.4.0763

Cited by 342 publications

(218 citation statements)

References 138 publications

(103 reference statements)

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“…rotifers and Bosmina) (Peters & Downing, 1984;Cyr & Pace, 1992;Tessier & Bizina, 2001). Like the ratio of zooplankton to phytoplankton biomass decreasing with increasing mean body length, size structure was also insignificant in explaining residual variations of summer Chl a, indicating that larger size structure was not always associated with higher zooplankton grazing pressure.…”

Section: Discussionmentioning

confidence: 90%

Crustacean zooplankton size structure in aquaculture lakes: is larger size structure always associated with higher grazing pressure?

Wang

Xie

et al. 2006

Hydrobiologia

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Crustacean zooplankton size structure in 27 aquaculture lakes was studied to test the hypothesis that larger size structure is associated with higher grazing pressure. Mean body length of crustaceans was positively correlated with increasing Chl a (r 2 = 0.40, P = 0.000) and TP (r 2 = 0.38, P = 0.000), contrary to the empirical studies. However, the ratio of zooplankton to phytoplankton biomass decreased significantly with increasing TP (r 2 = 0.27, P = 0.005) and mean body length (r 2 = 0.46, P = 0.000). Meanwhile, size structure showed no significant effect in explaining residual variations of phosphoruschlorophyll relationship (P = 0.231). These results indicate that larger size structure was not always associated with higher zooplankton grazing pressure. It is likely that in aquaculture lakes crustacean zooplankton size structure was of minor importance in control of phytoplankton biomass, and it was mainly regulated by fish predation. The results showed in our study and the empirical studies might be a reflection of two different stages of lake eutrophication and fish predation intensity.

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Section: Discussionmentioning

confidence: 90%

Crustacean zooplankton size structure in aquaculture lakes: is larger size structure always associated with higher grazing pressure?

Wang

Xie

et al. 2006

Hydrobiologia

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“…It is important to note that feeding rates could be affected by several potential sources of bias. For instance, bottle effects and crowding (Peters and Downing 1984) and the lack of turbulence during the incubations may result in lower feeding rates than under natural conditions (Saiz et al 2003). Nevertheless, predator biomass used in the feeding experiments was in the range commonly used in incubation experiments with larger zooplankton (Nejstgaard et al 2001;Broglio et al 2004) Another source of error could be inclusion of all nauplii stages as predators for the calculation of feeding rates, because some calanoid nauplii start feeding at naupliar stage II or III (Landry 1975).…”

Section: Discussionmentioning

confidence: 99%

Trophic role and carbon budget of metazoan microplankton in northwest Mediterranean coastal waters

Almeda

Calbet

Alcaraz

et al. 2011

Limnology & Oceanography

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We determined the feeding rates, trophic effect, and growth efficiencies of natural assemblages of metazoan microplankton from a coastal site in the northwest (NW) Mediterranean over a seasonal cycle in laboratory incubations. Micrometazoans, i.e., multicellular heterotrophic plankters between 20 and 200 mm, were mainly constituted by invertebrate larval stages. Copepod nauplii and copepodites dominated the community, except in April, when polychaete larvae dominated. We analyzed the grazing pressure of micrometazoans on chlorophyll a (Chl a; total and . 10 mm), nanoflagellates, phototrophic nanoflagellates, dinoflagellates, diatoms, and ciliates. Micrometazoans grazed on all the prey groups, with carbon-specific ingestion rates ranging from 0.31 to 1.24 d 21 . The gross growth efficiencies for the entire metazoan microplankton community, calculated as the slope of the linear regression relating specific growth rates vs. specific ingestion rates, varied between 0.27 and 0.39. The respiratory carbon losses of micrometazoans depended on temperature and ranged from 0.16 to 0.36 d 21 , with a Q 10 5 2. The average net growth efficiency, 0.41, was independent of temperature and food availability. Overall micrometazoans have higher specific growth rates than, but similar food conversion efficiencies to, mesozooplankton. The grazing effect on the standing stock of the different prey was , 1% d 21 for Chl a (total and . 10 mm) and , 2.5% d 21 for the other studied prey, which seems insufficient to exert relevant control on phytoplankton and protozoan dynamics. The inclusion of micrometazoans did not change appreciably our current view of the role of metazooplankton in marine trophic webs of NW Mediterranean coastal waters.

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“…Here, zooplankton, mussels and filter feeding fish species can be used. For instance, cladocera group zooplankton individual filters 11 ml of water and consumes 40 µg of food on a daily basis (Peters, Downing, 1984). Their concentration in known AAFW systems have exceeded 1000 individuals per liter.…”

Section: General Performancementioning

confidence: 99%

Use of Artificial Aquatic Food-Web for Post-Treatment of Domestic Wastewater in Cold Climate: A Review

Lavrinovičs

Juhna

2017

Journal of Water Security

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Abstract. Eutrophication-promoting phosphorous loads originating from wastewater treatment plants are commonly controlled by chemical precipitation in the tertiary treatment phase. However, this approach is costly and generates additional waste. Therefore, inexpensive and sustainable methods for wastewater post-treatment are wanted. The artificial aquatic food-web that performs wastewater phycoremediation by algae and subsequent biomass harvest by filter-feeding organisms not only requires low energy consumption but also produces biomass for treatment process cost recovery. Still, the knowledge on its performance at different scales and under different climates are limited. In this review, the application possibilities of the artificial aquatic food-web for domestic wastewater post-treatment is discussed, focusing on its use in cold climate regions. Considering the reduced biological activity of aquatic organisms at low ambient temperature, possible solutions for its performance and prospect application at low temperatures are suggested. Finally, directions for future research regarding the practical use of artificial aquatic food-web are highlighted.

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Empirical analysis of zooplankton filtering and feeding rates1

Cited by 342 publications

References 138 publications

Crustacean zooplankton size structure in aquaculture lakes: is larger size structure always associated with higher grazing pressure?

Crustacean zooplankton size structure in aquaculture lakes: is larger size structure always associated with higher grazing pressure?

Trophic role and carbon budget of metazoan microplankton in northwest Mediterranean coastal waters

Use of Artificial Aquatic Food-Web for Post-Treatment of Domestic Wastewater in Cold Climate: A Review

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