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Effects of UVB radiation on grazing of two cladocerans from high-altitude Andean lakes

Fernandez Espinoza, Carla LU and Rejas, Danny (2017) In PLoS ONE 12(4). p.1-13
Abstract
Climate change and water extraction may result in increased exposition of the biota to ultraviolet-B radiation (UVB) in high-altitude Andean lakes. Although exposition to lethal doses in these lakes is unlikely, sub-lethal UVB doses may have strong impacts in key compartments such as zooplankton. Here, we aimed at determining the effect of sub-lethal UVB doses on filtration rates of two cladoceran species (Daphnia pulicaria and Ceriodaphnia dubia). We firstly estimated the Incipient Limiting Concentration (ILC) and the Gut Passage Time (GPT) for both species. Thereafter we exposed clones of each species to four increasing UVB doses (treatments): i) DUV-0 (Control), ii) DUV-1 (0.02 MJ m2), iii) DUV-2 (0.03 MJ m2) and iv) DUV-3 (0.15 MJ m2);... (More)
Climate change and water extraction may result in increased exposition of the biota to ultraviolet-B radiation (UVB) in high-altitude Andean lakes. Although exposition to lethal doses in these lakes is unlikely, sub-lethal UVB doses may have strong impacts in key compartments such as zooplankton. Here, we aimed at determining the effect of sub-lethal UVB doses on filtration rates of two cladoceran species (Daphnia pulicaria and Ceriodaphnia dubia). We firstly estimated the Incipient Limiting Concentration (ILC) and the Gut Passage Time (GPT) for both species. Thereafter we exposed clones of each species to four increasing UVB doses (treatments): i) DUV-0 (Control), ii) DUV-1 (0.02 MJ m2), iii) DUV-2 (0.03 MJ m2) and iv) DUV-3 (0.15 MJ m2); and estimated their filtration rates using fluorescent micro-spheres. Our results suggest that increasing sub-lethal doses of UVB radiation may strongly disturb the structure and functioning of high-altitude Andean lakes. Filtration rates of D. pulicaria were not affected by the lowest dose applied (DUV-1), but decreased by 50% in treatments DUV-2 and DUV-3. Filtration rates for C. dubia were reduced by more than 80% in treatments DUV-1 and DUV-2 and 100% of mortality occurred at the highest UVB dose applied (DUV-3). (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ultraviolet radiation, grazing, fluorescent micro-spheres, climate change, Bolivia
in
PLoS ONE
volume
12
issue
4
pages
13 pages
publisher
Public Library of Science
external identifiers
  • scopus:85016982602
  • wos:000399353500041
ISSN
1932-6203
DOI
10.1371/journal.pone.0174334
language
English
LU publication?
yes
id
362b68cc-9cb2-4650-9b03-ceb5fe3fdf39
date added to LUP
2017-04-06 12:19:50
date last changed
2017-09-18 13:31:39
@article{362b68cc-9cb2-4650-9b03-ceb5fe3fdf39,
  abstract     = {Climate change and water extraction may result in increased exposition of the biota to ultraviolet-B radiation (UVB) in high-altitude Andean lakes. Although exposition to lethal doses in these lakes is unlikely, sub-lethal UVB doses may have strong impacts in key compartments such as zooplankton. Here, we aimed at determining the effect of sub-lethal UVB doses on filtration rates of two cladoceran species (Daphnia pulicaria and Ceriodaphnia dubia). We firstly estimated the Incipient Limiting Concentration (ILC) and the Gut Passage Time (GPT) for both species. Thereafter we exposed clones of each species to four increasing UVB doses (treatments): i) DUV-0 (Control), ii) DUV-1 (0.02 MJ m2), iii) DUV-2 (0.03 MJ m2) and iv) DUV-3 (0.15 MJ m2); and estimated their filtration rates using fluorescent micro-spheres. Our results suggest that increasing sub-lethal doses of UVB radiation may strongly disturb the structure and functioning of high-altitude Andean lakes. Filtration rates of D. pulicaria were not affected by the lowest dose applied (DUV-1), but decreased by 50% in treatments DUV-2 and DUV-3. Filtration rates for C. dubia were reduced by more than 80% in treatments DUV-1 and DUV-2 and 100% of mortality occurred at the highest UVB dose applied (DUV-3).},
  author       = {Fernandez Espinoza, Carla and Rejas, Danny},
  issn         = {1932-6203},
  keyword      = {Ultraviolet radiation,grazing,fluorescent micro-spheres,climate change,Bolivia},
  language     = {eng},
  month        = {04},
  number       = {4},
  pages        = {1--13},
  publisher    = {Public Library of Science},
  series       = {PLoS ONE},
  title        = {Effects of UVB radiation on grazing of two cladocerans from high-altitude Andean lakes},
  url          = {http://dx.doi.org/10.1371/journal.pone.0174334},
  volume       = {12},
  year         = {2017},
}