Changes in copepod distributions associated with increased turbulence from wind stress

Incze, Lewis S.; Hebert, Dave; Wolff, Nicholas H.; Oakey, Neil S.; Dye, Dennis G.

doi:10.3354/meps213229

Cited by 99 publications

(66 citation statements)

References 41 publications

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“…For instance, foraging theory would predict that an optimal predator would attempt to be located at those turbulence intensities where the most benefit can be obtained, selecting best depth strata. The vertical distribution of Oithona in the studies of Incze et al (2001) and Visser et al (2001) appears to conform to this behavior (but see Lagadeuc et al 1997), as our results indicate.…”

Section: Discussionsupporting

confidence: 68%

“…Indeed, turbulence dissipation rates inducing such a deepening are on the order of 10 Ϫ2 -10 0 cm 2 s Ϫ3 (Incze et al 2001;Visser et al 2001). In spite of expected differences in scale and measurement techniques, these values are of the same magnitude as the turbulence intensities that induce detrimental effects on feeding of O. davisae in the laboratory.…”

Section: Discussionmentioning

confidence: 56%

“…In reconsidering the original goal of this work, it appears that this higher sensitivity of O. davisae feeding to turbulence would help explain the field observations of the deepening of Oithona vertical distribution under situations of high turbulence (Incze et al 2001;Visser et al 2001). Indeed, turbulence dissipation rates inducing such a deepening are on the order of 10 Ϫ2 -10 0 cm 2 s Ϫ3 (Incze et al 2001;Visser et al 2001).…”

Section: Discussionmentioning

confidence: 99%

“…In spite of expected differences in scale and measurement techniques, these values are of the same magnitude as the turbulence intensities that induce detrimental effects on feeding of O. davisae in the laboratory. Further support for a higher sensitivity to turbulence is suggested by the depths at which Oithona tend to occur in the field, under either quiescent conditions or strong winds, which have associated dissipation rates on the order of 10 Ϫ4 cm 2 s Ϫ3 (Incze et al 2001), a value at which feeding rates of O. davisae are enhanced in the laboratory.…”

Section: Discussionmentioning

confidence: 99%

“…On the basis of its ambush behavior (feeding on motile prey or sinking pellets, Kiørboe and Visser 1999), one can predict a large enhancement of its feeding rates under turbulence. However, recent field studies (Incze et al 2001;Visser et al 2001) that couple fine-scale copepod dis-tribution with small-scale measurements of turbulence indicate that Oithona can avoid high turbulence levels by going to deeper, calmer waters, which suggests a detrimental effect of turbulence on their performance. Evidence is inconclusive because of the dispersive effect of turbulence (Haury et al 1990), which could explain the deepening of the average depth of their distribution.…”

Section: Acknowledgmentsmentioning

confidence: 99%

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Effects of small‐scale turbulence on copepods: The case of Oithona davisae

Saiz

Calbet

Broglio

2003

Limnology & Oceanography

121

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We report the effects of small-scale turbulence on the feeding rates of the marine copepod Oithona davisae. Laboratory experiments were conducted under a range of turbulence dissipation rates between 10 Ϫ4 and 10 1 cm 2 s Ϫ3 . Net enhancements of feeding were observed only at the lowest, whereas negative net effects appeared only at the highest, turbulence intensities. These results contrast with expectations from an encounter-based model for this copepod species that predicted positive feeding enhancements at all turbulence intensities. This disagreement suggests the presence of detrimental effects at moderate and high turbulence intensities, very likely driven by either a lower mechanosensor perception capability or lower capture success. In comparison to other ambush copepods, O. davisae appears much more sensitive to the presence of turbulence, which might be the result of its strict ambush behavior, whereas copepods like Acartia tonsa or Centropages typicus, which can switch into different feeding modes, appear to benefit more from turbulence. The response of O. davisae feeding to turbulence in our experiments agrees with recent field observations on changes in the vertical distribution of Oithona as a function of wind-driven turbulence events. Hence, O. davisae seems to choose those depths where small-scale turbulence favors feeding.

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Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 99%

See 3 more Smart Citations

Effects of small‐scale turbulence on copepods: The case of Oithona davisae

Saiz

Calbet

Broglio

2003

Limnology & Oceanography

121

View full text Add to dashboard Cite

show abstract

References

2005

Dynamics of Marine Ecosystems

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Resilience in moving water: Effects of turbulence on the predatory impact of the lobate ctenophore Mnemiopsis leidyi

Jaspers

Costello

Sutherland

et al. 2017

Limnology & Oceanography

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Despite its delicate morphology, the lobate ctenophore Mnemiopsis leidyi thrives in coastal ecosystems as an influential zooplankton predator. Coastal ecosystems are often characterized as energetic systems with high levels of natural turbulence in the water column. To understand how natural wind-driven turbulence affects the feeding ecology of M. leidyi, we used a combination of approaches to quantify how naturally and laboratory generated turbulence affects the behavior, feeding processes and feeding impact of M. leidyi. Experiments using laboratory generated turbulence demonstrated that turbulence can reduce M. leidyi feeding rates on copepods and Artemia nauplii by > 50%. However, detailed feeding data from the field, collected during highly variable surface conditions, showed that wind-driven turbulence did not affect the feeding rates or prey selection of M. leidyi. Additional laboratory experiments and field observations suggest that the feeding process of M. leidyi is resilient to wind-driven turbulence because M. leidyi shows a behavioral response to turbulence by moving deeper in the water column. Seeking refuge in deeper waters enables M. leidyi to maintain high feeding rates even under high turbulence conditions generated by wind driven mixing. As a result, M. leidyi exerted a consistently high predatory impact on prey populations during highly variable and often energetic wind-driven mixing conditions. This resilience adds to our understanding of how M. leidyi can thrive in a wide spectrum of environments around the world. The limits to this resilience also set boundaries to its range expansion into novel areas.

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Changes in copepod distributions associated with increased turbulence from wind stress

Cited by 99 publications

References 41 publications

Effects of small‐scale turbulence on copepods: The case of Oithona davisae

Effects of small‐scale turbulence on copepods: The case of Oithona davisae

References

Resilience in moving water: Effects of turbulence on the predatory impact of the lobate ctenophore Mnemiopsis leidyi

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