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Speciation leads to divergent methylmercury accumulation in sympatric whitefish

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cris.virtualsource.author-orcidd719c9f7-6f8b-4991-b3f3-923de041a6c9
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dc.contributor.authorBlank, Nanina
dc.contributor.authorHudson, Alan G.
dc.contributor.authorVonlanthen, Pascal
dc.contributor.authorSeehausen, Ole
dc.contributor.authorHammerschmidt, Chad R.
dc.contributor.authorSenn, David B.
dc.date.accessioned2024-10-13T13:09:18Z
dc.date.available2024-10-13T13:09:18Z
dc.date.issued2013
dc.description.abstractCentral European lake whitefish (Coregonus spp.) colonized Swiss lakes following the last glacial retreat and have undergone rapid speciation and adaptive radiation. Up to six species have been shown to coexist in some lakes, and individual species occupy specific ecological niches and have distinct feeding and reproductive ecologies. We studied methylmercury (MeHg) accumulation in sympatric whitefish species from seven Swiss lakes to determine if ecological divergence has led to different rates of MeHg bioaccumulation. In four of seven lakes, sympatric species had distinctly different MeHg levels, which varied by up to a factor of two between species. Generally, species with greater MeHg levels were smaller in body size and planktivorous, and species with lower MeHg were larger and benthivorous. While modest disparities in trophic position between species might be expected a priori to explain the divergence in MeHg, δ15N of bulk tissue did not correlate with fish MeHg in five of seven lakes. Results of a nested ANCOVA analysis across all lakes indicated that only two factors (species, lake) explained substantial portions of the variance, with species accounting for more variance (52 %) than inter-lake differences (32 %). We suggest that differences in MeHg accumulation were likely caused by diverging metabolic traits between species, such as differences in energy partitioning between anabolism and catabolism, potentially interacting with species-specific prey resource utilization. These results indicate substantial variability in MeHg accumulation between closely related fish species, illustrating that ecological speciation in fish can lead to divergent MeHg accumulation patterns.
dc.description.numberOfPages13
dc.description.sponsorshipInstitut für Ökologie und Evolution, Aquatische Ökologie
dc.identifier.doi10.7892/boris.16332
dc.identifier.isi000316566800007
dc.identifier.publisherDOI10.1007/s00027-012-0271-6
dc.identifier.urihttps://boris-portal.unibe.ch/handle/20.500.12422/90349
dc.language.isoen
dc.publisherSpringer
dc.publisher.placeBasel
dc.relation.ispartofAquatic Sciences
dc.relation.issn1015-1621
dc.relation.organizationDCD5A442C44BE17DE0405C82790C4DE2
dc.subject.ddc500 - Science::570 - Life sciences; biology
dc.titleSpeciation leads to divergent methylmercury accumulation in sympatric whitefish
dc.typearticle
dspace.entity.typePublication
dspace.file.typetext
oaire.citation.endPage273
oaire.citation.issue2
oaire.citation.startPage261
oaire.citation.volume75
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oairecerif.author.affiliationInstitut für Ökologie und Evolution, Aquatische Ökologie
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unibe.description.ispublishedpub
unibe.eprints.legacyId16332
unibe.journal.abbrevTitleAQUAT SCI
unibe.refereedTRUE
unibe.subtype.articlejournal

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