Effects of a decrease in downwelling irradiance on the daytime vertical distribution patterns of zooplankton and micronekton

Frank, Tamara M.; Widder, Edith A.

doi:10.1007/s00227-002-0788-7

Cited by 76 publications

(10 citation statements)

References 44 publications

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“…It is generally accepted that light is the primary proximate control cue that controls both the timing and the amplitude of the DVM (Cohen & Forward, 2009;Ringelberg, 1995). A hypothesis that has received considerable attention is the light preferendum hypothesis, which postulates that vertically migrating organisms remain within a preferred light domain (Aksnes et al, 2017;Cohen & Forward, 2009;Frank & Widder, 2002). Following, we assume in APECOSM that migratory organisms cluster around a defined isolume:…”

Section: Apecosmmentioning

confidence: 99%

“…The depth at which the organisms migrate has been hypothesized to be mainly controlled by the light level, except when oxygen levels are not sufficient to sustain respiration. This assumption is based on the light preferendum hypothesis, which has received considerable attention in the literature (e.g., Cohen & Forward, 2009;Frank & Widder, 2002). However, alternative explanations have been proposed.…”

Section: Model Caveatsmentioning

confidence: 99%

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Evaluating the Potential Impacts of the Diurnal Vertical Migration by Marine Organisms on Marine Biogeochemistry

Aumont

Maury

Lefort

et al. 2018

Global Biogeochemical Cycles

118

107

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Diurnal vertical migration (DVM) of marine organisms is an ubiquitous phenomenon in the ocean that generates an active vertical transport of organic matter. However, the magnitude and consequences of this flux are largely unknown and are currently overlooked in ocean biogeochemical models. Here we present a global model of pelagic ecosystems based on the ocean biogeochemical model NEMO‐PISCES that is fully coupled to the upper trophic levels model Apex Predators ECOSystem Model, which includes an explicit description of migrating organisms. Evaluation of the model behavior proved to be challenging due to the scarcity of suitable observations. Nevertheless, the model appears to be able to simulate approximately both the migration depth and the relative biomass of migrating organisms. About one third of the epipelagic biomass is predicted to perform DVM. The flux of carbon driven by DVM is estimated to be 1.05 ± 0.15 PgC/year, about 18% of the passive flux of carbon due to sinking particles at 150 m. Comparison with local studies suggests that the model captures the correct magnitude of this flux. Oxygen is decreased in the mesopelagic domain by about 5 mmol m−3 relative to simulations of an ocean without DVM. Our study concludes that DVM drives a significant and very efficient flux of carbon to the mesopelagic domain, similar in magnitude to the transport of DOC. Relative to a model run without DVM, the consequences of this flux seem to be quite modest on oxygen, due to compensating effects between DVM and passive fluxes.

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Section: Apecosmmentioning

confidence: 99%

Section: Model Caveatsmentioning

confidence: 99%

Evaluating the Potential Impacts of the Diurnal Vertical Migration by Marine Organisms on Marine Biogeochemistry

Aumont

Maury

Lefort

et al. 2018

Global Biogeochemical Cycles

118

107

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“…This corresponds to the preferendum or isolume hypothesis (see Cohen & Forward 2009), implying that vertical migration emerges simply because organisms are attracted to a preferred light level. Instead of being attracted to a specific light level, however, light-driven migration also emerges if organisms distribute within a range of light intensities (Frank & Widder 2002, Dupont et al 2009, Staby & Aksnes 2011. Avoidance, rather than attraction, might be involved.…”

Section: Light Preferendum and Light Comfort Zone Hypothesesmentioning

confidence: 99%

Evidence for light-controlled migration amplitude of a sound scattering layer in the Norwegian Sea

Norheim¹,

Klevjer²,

Aksnes³

2016

Mar. Ecol. Prog. Ser.

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“…In fact, many different environmental factors can affect DVM, including UV radiation [Leech and Williamson, 2001]. Various natural events and processes can also alter "standard" DVM, including eclipses [Kampa, 1975], phases of the Moon [Ochoa et al, 2013], ice cover [Wallace et al, 2010], and water turbidity [Frank and Widder, 2002;Rose et al, 2012].…”

Section: Introductionmentioning

confidence: 99%

Vertical redistribution of zooplankton in an oligotrophic lake associated with reduction in ultraviolet radiation by wildfire smoke

Urmy

Williamson

Leach

et al. 2016

Geophysical Research Letters

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We used a natural experiment to test whether wildfire smoke induced changes in the vertical distribution of zooplankton in Lake Tahoe by decreasing incident ultraviolet radiation (UV). Fires have a variety of effects on aquatic ecosystems, but these impacts are poorly understood and have rarely been observed directly. UV is an important driver of zooplankton vertical migration, and wildfires may alter it over large spatial scales. We measured UV irradiance and the distribution of zooplankton on two successive days. On one day, smoke haze from a nearby wildfire reduced incident UV radiation by up to 9%, but not irradiance in the visible spectrum. Zooplankton responded by positioning themselves, on average, 4.1 m shallower in the lake. While a limited data set such as this requires cautious interpretation, our results suggest that smoke from wildfires can change the UV environment and distribution of zooplankton. This process may be important in drought‐prone regions with increasingly frequent wildfires, and globally due to widespread biomass burning.

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Effects of a decrease in downwelling irradiance on the daytime vertical distribution patterns of zooplankton and micronekton

Cited by 76 publications

References 44 publications

Evaluating the Potential Impacts of the Diurnal Vertical Migration by Marine Organisms on Marine Biogeochemistry

Evaluating the Potential Impacts of the Diurnal Vertical Migration by Marine Organisms on Marine Biogeochemistry

Evidence for light-controlled migration amplitude of a sound scattering layer in the Norwegian Sea

Vertical redistribution of zooplankton in an oligotrophic lake associated with reduction in ultraviolet radiation by wildfire smoke

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