Vertical Migration in <i>Daphnia galeata</i> mendotae (Brooks): Demographic Responses to Changes in Planktivore Abundance

Stirling, D. G.; McQueen, Donald J.; Johannes, Mark R. S.

doi:10.1139/f90-041

Cited by 35 publications

(19 citation statements)

References 12 publications

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“…Holopedium is a generally poor competitor that has low clearance rates (Allan 1973;Hessen et al 1993;Brett and Goldman 1994). D. galeata mendotae uses vertical migration to avoid predation (Stirling et al 1990;Lehman and Caceres 1993;Schulz and Yurista 1998), which could effectively result in a vertical separation of resource use between Conochilus and D. galeata mendotae. Dumitru et al (2001) reported that owing to vertical migration, there is only weak overlap between Bythotrephes and D. galeata mendotae in Harp L., as D. galeata mendotae remains in deep waters for large portions of the day.…”

Section: Discussionmentioning

confidence: 99%

Indirect food web effects of Bythotrephes invasion: responses by the rotifer Conochilus in Harp Lake, Canada

et al. 2006

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As a recent invader of North American lakes, Bythotrephes longimanus has induced large changes in crustacean zooplankton communities through direct predation effects. Here we demonstrate that Bythotrephes can also have indirect food web effects, specifically on rotifer fauna. In historical time series data, the densities of the colonial rotifer Conochilus unicornis significantly increased after Bythotrephes invasion in Harp Lake, Ontario. No such changes were observed in a non-invaded reference lake, the nearby Red Chalk Lake. Evidence for two mechanisms explaining the Conochilus increase was examined based on changes to the crustacean zooplankton community over time. Rapid and severe declines in several herbivorous species of cladoceran zooplankton after Bythotrephes detection indicated a decrease in exploitative competition pressure on Conochilus. Secondly, a later and significant decline to virtual extinction of native invertebrate predators (Mesocyclops and Leptodora) could account for the observed Conochilus increase which also began 1-2 years after invasion by Bythotrephes. Ultimately, it appears that both reduced competition followed by a loss of native invertebrate predators were necessary to lead to the large Conochilus densities observed following invader establishment. From this analysis of long-term community data, it appears that Bythotrephes has important indirect, as well as direct, food web effects in newly invaded North American lakes with implications for trophic relationships.

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Section: Discussionmentioning

confidence: 99%

Indirect food web effects of Bythotrephes invasion: responses by the rotifer Conochilus in Harp Lake, Canada

et al. 2006

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“…Of the several hypotheses put forth to explain the adaptive significance of DVM (Kerfoot, 1985;Lampert, 1989), evidence implicating predator evasion has recently accumulated from field (Bollens & Frost, 1989a;Stirling et al, 1990;Ohman, 1990), theoretical (Frost, 1988;Gabriel & Thomas, 1988;Mange1 & Clark, 1988;Ohman, 1990) and experimental (Bollens & Frost, 1989b;Neill, 1990) studies. These studies lead to the prediction that the occurrence of DVM in planktonic animals in the field is positively related to the abundance of their predators.…”

Section: Introductionmentioning

confidence: 99%

Diel vertical migration in zooplankton: field evidence in support of the predator avoidance hypothesis

et al. 1992

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We report results of a field test of the predator avoidance hypothesis as an explanation of the adaptive significance of diel vertical migration in zooplankton. We determined the vertical distribution and diel migration of the planktonic copepod Acartia hudsonica, concurrently with the abundance of pelagic fish, transparency and thermal stratification of the water column, on six cruises over a one year period in a temperate marine lagoon (Jakles Lagoon, San Juan Island, Washington, USA). Striking seasonal variability was observed in all biological and environmental variables. Linear regressions of the strength of diel vertical migration in A. hudsonica on these environmental variables resulted in only one statistically significant relationship, that between copepod diel vertical migration and predator abundance. These results, together with those of previous studies, point to diel vertical migration as a widespread behavioral response of planktonic prey to the presence of their predators.

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“…Numerous abiotic and biotic factors have been proposed to explain DVM behaviour . Avoidance of visual predators, such as planktivorous fish, is now considered to be the major process causing DVM both in marine (Bollens & Frost, 1989a, 1989bFrost & Bollens, 1992) and freshwater zooplankton (Wright et al, 1980 ;Stich & Lampert, 1981 ;Gliwicz, 1986 ;Stirling et al, 1990 ;Lampert, 1992 ;De Stasio, 1993) . Other factors that have been found to initiate and regulate zooplankton DVM include light (Ringelberg, 1987, Dodson, 1990Leibold & West, 1993), temperature (Gerritsen, 1982), invertebrate predation and food distribution (Geller, 1986 ;Pijanowska & Dawidowicz, 1987 ;Leibold, 1990) .…”

Section: Introductionmentioning

confidence: 99%

Diel patterns of feeding and vertical migration in daphnids and diaptomids during the clear water phase in Lake Geneva (France)

Angéli¹,

Pinel‐Alloul

Balvay³

et al. 1995

Hydrobiologia

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In lacustrine environments, little attention has been paid to small-scale interactions between zooplankton diel vertical migration (DVM) and feeding rhythms . Moreover, most of the information on in situ diel feeding and migratory rhythms is based on low sampling frequencies . The kinetics and the degree of coupling of these processes are thus only roughly known . Here, we present a study conducted on a diel cycle in Lake Geneva to establish the temporal and spatial relationships between DVM and grazing activity of the dominant planktonic crustaceans . Our methodological approach is based on reliable and frequent (every 30 minutes) sampling, and on gut fullness analysis . We test the hypothesis of temporal and spatial segregation in DVM and feeding activity of sympatric taxa to counteract resource competition . We also evaluate the variation in DVM and feeding activity between taxa, size and sexes . In Lake Geneva, the Daphnia complex of different species and size (D . hyalina x galeata) and the diaptomid (Eudiaptomus gracilis) have distinct DVM and diel feeding patterns which lead to temporal and spatial segregation . Differences arise from the amplitude and kinetics of DVM and diet feeding rhythms . A strong day/night contrast in depth distribution and feeding activity was observed for the large daphnids while the small daphnids and the diaptomids had lower amplitudes of DVM and weaker diet changes in feeding activity . Large Daphnia exhibited a bimodal feeding pattern coupled with dynamic interchange of individuals between the epi-and hypolimnetic layers at dusk and dawn . In contrast, little coupling between DVM and feeding patterns was found for the diaptomid . These distinct behaviours can be viewed as specific adaptative strategies developed by calanids and daphnids to limit interspecific competition and to compromise between avoidance of starvation in deep waters and avoidance of visual predators in surface layers . Our study supports the hypothesis of exogenous control of Daphnia DVM by the relative change in light intensity at dusk and dawn, but also suggests that small Daphnia (not large ones), are controlled by absolute light variations when this major stimulus is lacking . Our results also support the hypothesis that selective predation by fish is responsible for the observed differences in DVM and diel feeding patterns of sized-daphnids and diaptomids . Other factors explaining the coupling of DVM and feeding patterns are hunger, vertical temperature gradient and for daphnids, size . Thus, ecological plasticity in crustacean DVM and feeding patterns results from the interactive effect of multiple abiotic and biotic driving forces . Finally, our study also shows that large Daphnia have a marked contribution to the acceleration of downward nutrient fluxes in Lake Geneva, via their diurnal rhythm in feeding and vertical migration . Ecological implications of the study for lake management and sampling design of zooplankton grazing studies are also presented . ResumeDans les ecosyst6mes lacustres, les in...

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Vertical Migration in Daphnia galeata mendotae (Brooks): Demographic Responses to Changes in Planktivore Abundance

Cited by 35 publications

References 12 publications

Indirect food web effects of Bythotrephes invasion: responses by the rotifer Conochilus in Harp Lake, Canada

Indirect food web effects of Bythotrephes invasion: responses by the rotifer Conochilus in Harp Lake, Canada

Diel vertical migration in zooplankton: field evidence in support of the predator avoidance hypothesis

Diel patterns of feeding and vertical migration in daphnids and diaptomids during the clear water phase in Lake Geneva (France)

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