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Escape from UV threats in zooplankton: A cocktail of behavior and protective pigmentation

Hansson, Lars-Anders LU ; Hylander, Samuel LU and Sommaruga, Ruben (2007) In Ecology 88(8). p.1932-1939
Abstract
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... (More)
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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ultraviolet, trait compensation, pigment, phenotypic plasticity, acid, mycosporine-like amino, limnology, lakes, Daphnia, carotenoid, copepod, radiation, UV radiation, zooplankton
in
Ecology
volume
88
issue
8
pages
1932 - 1939
publisher
Ecological Society of America
external identifiers
  • wos:000248620500010
  • scopus:35148890412
ISSN
0012-9658
DOI
10.1890/06-2038.1
language
English
LU publication?
yes
id
c16f4107-bebc-42f0-815d-a25ba629ed56 (old id 692707)
date added to LUP
2007-12-11 13:09:52
date last changed
2017-10-01 04:37:54
@article{c16f4107-bebc-42f0-815d-a25ba629ed56,
  abstract     = {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.},
  author       = {Hansson, Lars-Anders and Hylander, Samuel and Sommaruga, Ruben},
  issn         = {0012-9658},
  keyword      = {ultraviolet,trait compensation,pigment,phenotypic plasticity,acid,mycosporine-like amino,limnology,lakes,Daphnia,carotenoid,copepod,radiation,UV radiation,zooplankton},
  language     = {eng},
  number       = {8},
  pages        = {1932--1939},
  publisher    = {Ecological Society of America},
  series       = {Ecology},
  title        = {Escape from UV threats in zooplankton: A cocktail of behavior and protective pigmentation},
  url          = {http://dx.doi.org/10.1890/06-2038.1},
  volume       = {88},
  year         = {2007},
}