Grazing rates of Calanus finmarchicus on Thalassiosira weissflogii cultured under different levels of ultraviolet radiation

UVB alters photosynthetic rate, fatty acid profiles and morphological characteristics of phytoplankton. Copepods, important grazers of primary production, select algal cells based upon their size, morphological traits, nutritional status, and motility. We investigated the grazing rates of the copepo...

Full description

Saved in:
Bibliographic Details
Published in:PloS one 2011-10, Vol.6 (10), p.e26333-e26333
Main Authors: Fields, David M, Durif, Caroline M F, Bjelland, Reidun M, Shema, Steven D, Skiftesvik, Anne B, Browman, Howard I
Format: Article
Language:English
Subjects:
Acartia tonsa
Algae
Animals
Bacillariophyta
Biology
Calanus finmarchicus
Calanus helgolandicus
Copepoda
Copepods
Culture Techniques - methods
Diatoms - growth & development
Diatoms - metabolism
Diatoms - radiation effects
Dose-Response Relationship, Radiation
Earth Sciences
Eudiaptomus gracilis
Euterpina acutifrons
Fatty acids
Feeding Behavior
Flow rates
Flow velocity
Food
Food quality
Grazing
Laboratories
Limnology
Marine biology
Marine ecology
Nutritional status
Oceanography
Organic matter
Photosynthesis
Photosynthetically active radiation
Physical characteristics
Phytoplankton
Plankton
Primary production
Thalassiosira
Thalassiosira weissflogii
U.V. radiation
Ultraviolet radiation
Ultraviolet Rays
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:UVB alters photosynthetic rate, fatty acid profiles and morphological characteristics of phytoplankton. Copepods, important grazers of primary production, select algal cells based upon their size, morphological traits, nutritional status, and motility. We investigated the grazing rates of the copepod Calanus finmarchicus on the diatom Thalassiosira weissflogii cultured under 3 levels of ultraviolet radiation (UVR): photosynthetically active radiation (PAR) only (4 kJ-m(-2)/day), and PAR supplemented with UVR radiation at two intensities (24 kJ-m(-2)/day and 48 kJ-m(-2)/day). There was no significant difference in grazing rates between the PAR only treatment and the lower UVR treatment. However, grazing rates were significantly (∼66%) higher for copepods feeding on cells treated with the higher level of UVR. These results suggest that a short-term increase in UVR exposure results in a significant increase in the grazing rate of copepods and, thereby, potentially alters the flow rate of organic matter through this component of the ecosystem.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0026333