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Escape from UV threats in zooplankton: A cocktail of behavior and protective pigmentation
Responsible organisation
2007 (English)In: Ecology, ISSN 0012-9658, E-ISSN 1939-9170, Vol. 88, no 8, 1932-1939 p.Article in journal (Refereed) Published
Abstract [en]

In order to avoid environmental threats, organisms may respond by altering behavior or phenotype. Using experiments performed in high-latitude Siberia and in temperate Sweden, we show for the first time that, among freshwater crustacean zooplankton, the defense against threats from ultraviolet radiation (UV) is a system where phenotypic plasticity and behavioral escape mechanisms function as complementary traits. Freshwater copepods relied mainly on accumulating protective pigments when exposed to UV radiation, but Daphnia showed strong behavioral responses. Pigment levels for both Daphnia and copepods were generally higher at higher latitudes, mirroring different UV threat levels. When released from the UV threat, Daphnia rapidly reduced (within 10 days) their UV protecting pigmentation-by as much as 40%-suggesting a cost in maintaining UV protective pigmentation. The. evolutionary advantage of protective pigments is, likely, the ability to utilize the whole water column during daytime; conversely, since the amount of algal food is generally higher in surface waters, unpigmented individuals are restricted to a less preferred feeding habitat in deeper waters. Our main conclusion is that different zooplankton taxa, and similar taxa at different latitudes, use different mixes of behavior and pigments to respond to UV radiation.

Place, publisher, year, edition, pages
2007. Vol. 88, no 8, 1932-1939 p.
Keyword [en]
carotenoid; copepod; Daphnia; lakes; limnology; mycosporine-like amino acid; phenotypic plasticity; pigment; trait compensation; ultraviolet radiation; UV radiation; zooplankton
National Category
Natural Sciences
Research subject
SWEDARCTIC 2005, Beringia 2005
Identifiers
URN: urn:nbn:se:polar:diva-3170DOI: 10.1890/06-2038.1OAI: oai:DiVA.org:polar-3170DiVA: diva2:1049833
Available from: 2016-11-25 Created: 2016-11-21 Last updated: 2016-11-25

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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