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dc.contributor.authorOlguín-Jacobson, Carolina
dc.contributor.authorPitt, Kylie A
dc.date.accessioned2021-06-24T03:41:41Z
dc.date.available2021-06-24T03:41:41Z
dc.date.issued2021
dc.identifier.issn0166-445X
dc.identifier.doi10.1016/j.aquatox.2021.105866
dc.identifier.urihttp://hdl.handle.net/10072/405319
dc.description.abstractHerbicides are among the most detected pesticides in coastal environments. Herbicides may impact non-target organisms, but invertebrates that have a symbiotic relationship with microalgae (zooxanthellae) may be particularly susceptible. How zooxanthellae influence the response of organisms to herbicides, however, remains untested. We exposed zooxanthellate and azooxanthellate Cassiopea xamachana medusae to environmentally relevant concentrations of the herbicide atrazine (0 µg L - 1, 7 µg L - 1 and 27 µg L - 1) for 20 days. We hypothesised that atrazine would have adverse effects on the size, rate of bell contractions and, respiration of medusae, but that effects would be more severe in zooxanthellate than azooxanthellate medusae. We also predicted that photosynthetic efficiency, chlorophyll a (Chla) content and zooxanthellae density would decrease in zooxanthellate medusae exposed to atrazine. Both zooxanthellate and azooxanthellate medusae shrank, yet the size-specific respiration rates were not constant during the experiment. Photosynthetic efficiency of zooxanthellate medusae significantly decreased at 7 and 27 µgL-1 atrazine, but atrazine did not affect the Chla content or zooxanthellae density. Our results showed that even though atrazine inhibited photosynthesis, zooxanthellae were not expelled from the host. We conclude that the presence of zooxanthellae did not increase the susceptibility of C. xamachana medusae to atrazine.
dc.description.peerreviewedYes
dc.languageeng
dc.publisherElsevier BV
dc.relation.ispartofpagefrom105866
dc.relation.ispartofjournalAquatic Toxicology
dc.relation.ispartofvolume236
dc.subject.fieldofresearchEcology
dc.subject.fieldofresearchEcological applications
dc.subject.fieldofresearchEnvironmental management
dc.subject.fieldofresearchPollution and contamination
dc.subject.fieldofresearchEnvironmental biogeochemistry
dc.subject.fieldofresearchNoise and wave pollution processes and measurement
dc.subject.fieldofresearchGroundwater quality processes and contaminated land assessment
dc.subject.fieldofresearchSurface water quality processes and contaminated sediment assessment
dc.subject.fieldofresearchPollution and contamination not elsewhere classified
dc.subject.fieldofresearchChemical sciences
dc.subject.fieldofresearchEnvironmental sciences
dc.subject.fieldofresearchBiological sciences
dc.subject.fieldofresearchcode3103
dc.subject.fieldofresearchcode4102
dc.subject.fieldofresearchcode4104
dc.subject.fieldofresearchcode4105
dc.subject.fieldofresearchcode410404
dc.subject.fieldofresearchcode410501
dc.subject.fieldofresearchcode410502
dc.subject.fieldofresearchcode410503
dc.subject.fieldofresearchcode410504
dc.subject.fieldofresearchcode410599
dc.subject.fieldofresearchcode34
dc.subject.fieldofresearchcode41
dc.subject.fieldofresearchcode31
dc.subject.keywordsAtrazine
dc.subject.keywordsChronic exposure
dc.subject.keywordsEnvironmentally relevant concentrations
dc.subject.keywordsPhotosynthetic efficiency
dc.titleSymbiotic microalgae do not increase susceptibility of zooxanthellate medusae (Cassiopea xamachana) to herbicides
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationOlguín-Jacobson, C; Pitt, KA, Symbiotic microalgae do not increase susceptibility of zooxanthellate medusae (Cassiopea xamachana) to herbicides, Aquatic Toxicology, 2021, 236, pp. 105866
dcterms.dateAccepted2021-05-08
dc.date.updated2021-06-24T03:28:43Z
gro.hasfulltextNo Full Text
gro.griffith.authorPitt, Kylie A.
gro.griffith.authorOlguin Jacobson, Carolina


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