Daphnia body size and population dynamics under predation by invertebrate and fish predators in Lago Maggiore: an approach based on contribution analysis

Manca, Marina; Vijverberg, J.; Polishchuk, Leonard V.; Voronov, Dmitry A.

doi:10.4081/jlimnol.2008.15

Cited by 36 publications

(46 citation statements)

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“…The highest number of shared species was recorded among rotifers and most of the taxa recorded were of cosmopolitan distribution (Segers & De Smet 2008) and euryhaline (Fontaneto et al 2006). The presence of large-sized cladocerans, especially that of the genus Daphnia, was sporadic and never reached high densities, possibly due to the predation exerted by fish (Grosman & Sanzano 2003, Boveri & Quirós 2007, Manca et al 2008) present in both lakes. The high standard deviation values found in the abundance and biomass of both lakes were due to the pronounced seasonality of the pampean environments, that have produced marked differences in both parameters (Echaniz et al 2006(Echaniz et al , 2009.…”

Section: Discussionmentioning

confidence: 96%

“…Their composition, abundance and biomass are controlled by biotic and abiotic parameters. The former include the availability and quality of food resources, interspecific competition and predation by vertebrates and invertebrates (Lampert & Sommer 1997, Khan et al 2003, Chang et al 2004, Boveri & Quirós 2007, Manca et al 2008. The negative effects of poor quality food supply are known (DeMott et al 2001, Wilson & Hay 2007 as is the fact that the predation by zooplanktivorous fish produces the replacement of larger species by smaller ones is also known (Brooks & Dodson 1965).…”

Section: Introductionmentioning

confidence: 99%

“…The negative effects of poor quality food supply are known (DeMott et al 2001, Wilson & Hay 2007 as is the fact that the predation by zooplanktivorous fish produces the replacement of larger species by smaller ones is also known (Brooks & Dodson 1965). This, in turn, leads to changes in grazing pressure and phytoplankton biomass (top-down effect) (Bertolo et al 2000, Kalff 2002, Boveri & Quirós 2007, Manca et al 2008.…”

Section: Introductionmentioning

confidence: 99%

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Zooplankton richness, abundance and biomass of two hypertrophic shallow lakes with different salinity in central Argentina

et al. 2012

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The zooplankton of lakes is controlled by biological and physico-chemical parameters. Among the former, predation by fish can determine the replacement of large-sized species by small-sized ones and among the latter, salinity exerts negative effects on richness and abundance. Since it has been suggested that saline lakes without fishes have higher zooplankton biomass than low salinity ones, the aim of this study was to determine the richness, abundance and biomass of zooplankton in two lakes with different salinity and test the hypothesis that in the presence of zooplanktivorous fishes and at equal concentrations of nutrients and chlorophyll-a, saline lakes have higher biomass than those with low salinity. The study was conducted in two shallow lakes of the Province of La Pampa (central Argentina): a subsaline lake and a hyposaline lake, which shared high concentrations of chlorophyll-a and total phosphorus, reduced transparency and presence of planktivorous fish. Zooplankton richness was different and higher in the subsaline lake, whereas abundance and total biomass were similar, even when the taxonomic groups were considered separately. It is suggested that the presence of a halotolerant planktivorous fish controlled the size of zooplankton due to the predation on larger species and prevented the development of higher biomass in the saline lake, which is an important difference from previously recorded situations. This study shows that, regardless of the differences in salinity, the top-down effect in the food chain may have been a factor that equalized the zooplankton biomass by allowing only the development of small species and highlights the possible importance of fish predation in determining chlorophyll-a concentrations and water transparency.

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Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Zooplankton richness, abundance and biomass of two hypertrophic shallow lakes with different salinity in central Argentina

et al. 2012

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“…In spite of the substantial effect of fish stock on zooplankton, a relatively high importance of direct predation by planktonic IP was also reported (e.g., Chang and Hanazato, 2005;Wojtal et al, 2007;Manca et al, 2008). Cyclopoid copepods, mainly C. vicinus and M. leuckarti, represented the planktonic IP in our mesocosms.…”

Section: Discussionmentioning

confidence: 95%

“…The combination of vertebrate and invertebrate predation forms zooplankton assemblages in natural lakes (Blumenshine and Hambright, 2003) as well as in reservoirs (Hansson et al, 1998). There are great differences between the effect of fish and that of invertebrate predators (IP) on zooplankton species composition, biomass and size structure (e.g., Wojtal et al, 2004or Manca et al, 2008. The reason for such dissimilarities lies in the different way they find and obtain suitable prey.…”

Section: Introductionmentioning

confidence: 99%

Different effects of planktonic invertebrate predators and fish on the plankton community in experimental mesocosms

Šorf

Brandl

Znachor

et al. 2014

Ann. Limnol. - Int. J. Lim.

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-The impact of fish and cyclopoid copepod predation on zooplankton communities was evaluated using large-volume mesocosms (depth 9.5 m; volume 13 m 3 ) in the Ř ı´mov reservoir (Czech Republic). Two yearling roach and perch individuals introduced into mesocosms represented the fish treatment, which was compared to cyclopoid copepods (initial abundance of 2 ind.L x1 ) and a control with no initial addition of predators. Our results clearly support the hypothesis that planktivorous fish feeding leads to the suppression of large-bodied cladocerans. In the presence of fish, the cladoceran community changed from a dominance of large-bodied Daphnia spp. at the beginning to dominance by the smaller Bosmina longirostris at the end of the experiment. Chlorophyll-a concentration and rotifer abundances increased in the absence of daphnids. In the absence of fish, the presence of large-bodied cladocerans resulted in decreasing chlorophyll-a concentration. Although no significant differences were observed between cyclopoid abundances in treatments stocked with cyclopoids and the control, the proportion of large cladocerans clearly showed the effect of the manipulation. The similar trends in both of these treatments did not confirm the importance of cyclopoid predation in our experiment. The overall strong effect of fish over cyclopoid predation suggests the main role of fish predation in the forming of zooplankton communities and in turn impacting phytoplankton biomass in mesocosms.

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Antipredator responses of three Daphnia species within the D. longispina species complex to two invertebrate predators

Baludo,

Octorina,

Beckerman

et al. 2024

Ecology and Evolution

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Prey communities in natural environments face a diverse array of predators with distinct hunting techniques. However, most studies have focused only on the interactions between a single prey species and one or more predators and typically only one of many induced defense traits, which limits our understanding of the broader effects of predators on prey communities. In this study, we conducted a common garden experiment using five clones each of three Daphnia species (D. cucullata, D. galeata, and D. longispina) from the D. longispina species complex to investigate the plasticity of predator‐induced defenses in response to two predators in a community ecology setting. Five clones from each species were subjected to predator kairomones from two closely related invertebrate predators that are common in several European lakes, Bythotrephes longimanus or Leptodora kindtii for a duration of 10 days, and the morphological traits of body size, head size, spina size, and the presence of spinules on the ventral and dorsal carapace margins were measured. We show that among the species within this species complex there are different antipredator reactions to the invertebrate predators. The induced responses exhibited were species, trait, and predator‐specific. Notably, D. galeata and D. cucullata developed distinctive helmets as defensive mechanisms, while microdefenses were induced in D. galeata and D. longispina, but not in D. cucullata. This demonstrates that the expression of micro‐ and macrodefenses across species was unrelated, highlighting the possible independent evolution of microstructures as defensive modules in Daphnia's antipredator strategies. This study is the first to document both micro‐ and macrodefensive phenotypic plasticity in three co‐occurring Daphnia species within the D. longispina species complex. The differences in inducible defenses may have a substantial impact on how these three species cohabit with Bythotrephes and Leptodora.

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Daphnia body size and population dynamics under predation by invertebrate and fish predators in Lago Maggiore: an approach based on contribution analysis

Abstract: Predation on

Cited by 36 publications

References 28 publications

Zooplankton richness, abundance and biomass of two hypertrophic shallow lakes with different salinity in central Argentina

Zooplankton richness, abundance and biomass of two hypertrophic shallow lakes with different salinity in central Argentina

Different effects of planktonic invertebrate predators and fish on the plankton community in experimental mesocosms

Antipredator responses of three Daphnia species within the D. longispina species complex to two invertebrate predators

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