Do planktonic rotifers rely on terrestrial organic matter as a food source in reservoir ecosystems?

Wilk‐Woźniak, Elżbieta; Pociecha, Agnieszka; Amirowicz, Antoni; Gąsiorowski, Michał; Gadzinowska, Joanna

doi:10.1002/iroh.201301717

Cited by 15 publications

(10 citation statements)

References 23 publications

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“…A recent study by Wilk-Woźniak et al (2014) identified an increase in allochthonous resource use with availability, as promoted by reservoir inflow. The availability of both allochthonous and autochthonous organic matter in reservoirs is potentially controlled by seasonal factors (temperature, light, etc.)…”

Section: Variability In Resource and Consumer Allochthonymentioning

confidence: 99%

“…While the magnitude and importance of allochthonous inputs have been studied in both lakes and streams (Rasmussen, 2010;Cole et al, 2011;Marcarelli et al, 2011;Cole & Solomon, 2012;Roach, 2013), allochthonous resource use in reservoir food webs has received less attention (but see Babler et al, 2011;Wilk-Woźniak et al, 2014), although a recent study using stable isotopes identified a positive and nearly 1:1 relationship between zooplankton and POM d 13 C (Jeayong et al, 2013). Use of allochthonous resources by consumers in lakes is variable but tends to be correlated with allochthonous resource availability Wilkinson et al, 2013a;Berggren et al, 2014;Tanentzap et al, 2014;Berggren et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Assimilation of allochthonous organic matter by bacteria is a means whereby this material becomes available to higher consumers (Karlsson et al, 2003;Jansson et al, 2007;Wilk-Woźniak et al, 2014). Direct consumption of bacteria by zooplankton is one pathway for allochthonous organic matter support of higher consumers Persaud & Dillon, 2011;Taipale et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Use of allochthonous resources by zooplankton in reservoirs

et al. 2015

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Aquatic food webs are supported by primary production from within the system (autochthony) as well as organic matter produced outside of and transported into the system (allochthony). Zooplankton use allochthonous resources, especially in systems with high terrestrial loading and moderate to low internal primary production. We hypothesized that due to high terrestrial loads and remnant submerged terrestrial material, allochthonous resource use by zooplankton would be significant in all reservoirs and would decline along an increasing reservoir age gradient. Using hydrogen stable isotopes and a Bayesian mixing model, we estimated the contribution of allochthonous sources to organic matter pools and crustaceous zooplankton biomass for ten reservoirs. Dissolved organic matter (DOM) in all systems was dominated by allochthonous sources (posterior distribution median [92% allochthonous), while particulate organic matter (POM) composition varied (2-68% allochthonous) and had a lower allochthonous fraction in older reservoirs. There was no relationship between zooplankton allochthony and reservoir age. Crustaceous zooplankton allochthony varied among systems from 26 to 94%, and Chaoborus allochthony, measured in four reservoirs, was similarly variable (33-94%). Consumer allochthony was higher than POM allochthony in some reservoirs, potentially due to terrestrial DOM pathways being important and/or algal resources being inedible (e.g., cyanobacteria). As with many lakes, in the reservoirs we studied, allochthonous inputs account for a significant fraction of the organic matter of basal consumers.

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Section: Variability In Resource and Consumer Allochthonymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Use of allochthonous resources by zooplankton in reservoirs

et al. 2015

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“…Current supply of allochthonous POM may be more important to the reservoir's plankton community than the standing stock of available organic matter of autochthonous origin. Previous research on the planktonic food web of Dobczyce Reservoir has demonstrated the importance of allochthonous organic matter controlling the abundance of rotifers (Wilk‐Woźniak et al ., ). The greater importance of terrestrial POM for benthic invertebrates is probably restricted to areas close to tributary inflows, as shown by the δ 13 C values recorded in their vicinity and by the significant enrichment of 13 C in the benthos close to the dam.…”

Section: Discussionmentioning

confidence: 99%

The effect of water balance of a man‐made lacustrine ecosystem on the food web: does flushing affect the carbon signature of plankton and benthos?

et al. 2015

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Reservoir ecosystems may be supported by considerable input of organic matter originating from the catchment. Thus, the current proportion of allochthonous and autochthonous organic matter available to reservoir biota will be affected by changes in the flushing rate. In a medium‐sized submontane reservoir, we examined reaction of the δ13C isotopic signature of fine (10–50 µm) and coarse (>50 µm) fractions of the seston, and of benthic invertebrates, to the reservoir flushing rate. The δ13C signatures of samples varied, and spatially δ13C increased significantly down‐reservoir in all instances, becoming less similar to the carbon signature of organic matter of terrestrial origin. Two distinct trends in the correlation between δ13C and flushing rate were identified as follows: (1) fine seston tended to become more 13C‐depleted and therefore similar to the carbon signature of terrestrial organic matter; and (2) the 13C signature of coarse seston became enriched with increasing flushing, and also tended to become closer to values of terrestrial organic matter. Benthic assemblages did not display any clear association with flushing rates. Such reactions in different components of the food web to allochthonous carbon input and the rate of reservoir flushing may be a common feature of other comparable Central European reservoirs and an important characteristic of their carbon cycles. Copyright © 2015 John Wiley & Sons, Ltd.

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“…Animals that feed on the seston and bacteria are an important link in the transfer of carbon from bacterial biomass to macrozooplankton [51, 52], and might compete with ciliates which also transfer organic matter from bacteria in a microbial loop. This possibility will be the focus of our future work.…”

Section: Discussionmentioning

confidence: 99%

What Underpins the Trophic Networks of the Plankton in Shallow Oxbow Lakes?

et al. 2016

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The aim of this study was to determine the relationships in the microbial trophic network underpinning them about communities of plankton ciliates in shallow oxbow lakes of the Vistula River in southern Poland (Jeziorzany 1, Jeziorzany 2, Piekary, Tyniec). The plankton components (phytoplankton, ciliates, zooplankton) were grouped by dietary preference. The studied oxbows differed in physicochemical parameters and in phytoplankton. Cyanobacteria dominated in the total biomass of phytoplankton in the Tyniec oxbow, big green algae (>30 μm) in Piekary and Jeziorzany 1, and euglenoids in Jeziorzany 2 oxbow. The dominance pattern of ciliates and zooplankton were similar in all oxbows. Algivorous ciliates were the main dominant ciliates, and among zooplankton the dominant ones were herbivores that feed on small algae (<30 μm). The oxbows differed significantly in total phytoplankton biomass, cyanobacteria biomass, euglenoid biomass, small green algae (<30 μm) biomass, total biomass of zooplankton, biomass of zooplankton feeding on bacteria + algae, and biomass of zooplankton feeding on big algae (>30 μm). There was no significant differences in ciliate biomass between oxbows. In redundancy analyses, the variability at the trophic groups of plankton was described by explanatory variables in 42.3 %, and positive relationships were found: e.g., between omnivorous zooplankton biomass, the biomass of ciliates feeding on bacteria + algae, and NH4 level; between euglenoid biomass and dinoflagellate biomass; and between cyanobacteria biomass and bacterivorous ciliate biomass. Spearman correlation analysis revealed several relationships between different groups of plankton. In general, phytoplankton group shows more connection among themselves and with different zooplankton groups, e.g., phytoplankton biomass with herbivorous zooplankton biomass (−0.33); and cyanobacteria biomass with dinoflagellate biomass (0.65). Ciliates showed more connections among their trophic groups (e.g., algivorous ciliate biomass with omnivorous ciliate biomass, 0.78) and with zooplankton trophic groups (e.g., biomass of algivorous + bacterivorous ciliates with biomass of predator zooplankton, −0.36). Simple correlations analysis revealed the trophic food web network connectivity among plankton organisms, indicating the flow of organic matter from phytoplankton to zooplankton and from ciliates to zooplankton. Our study sheds light on the trophic relations among plankton ciliates, which are neglected in research but often form a large percentage of zooplankton biomass. In the studied oxbows, ciliate forms 6.7 % of total zooplankton biomass in Jeziorzany 1 and up to 44.5 % of it in the Piekary oxbow.

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Do planktonic rotifers rely on terrestrial organic matter as a food source in reservoir ecosystems?

Cited by 15 publications

References 23 publications

Use of allochthonous resources by zooplankton in reservoirs

Use of allochthonous resources by zooplankton in reservoirs

The effect of water balance of a man‐made lacustrine ecosystem on the food web: does flushing affect the carbon signature of plankton and benthos?

What Underpins the Trophic Networks of the Plankton in Shallow Oxbow Lakes?

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