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dc.contributor.authorPiscia, Roberta
dc.contributor.authorTabozzi, Simone
dc.contributor.authorBettinetti, Roberta
dc.contributor.authorNevalainen, Liisa
dc.contributor.authorManca, Marina M.
dc.date.accessioned2016-06-08T11:30:47Z
dc.date.available2016-06-08T11:30:47Z
dc.date.issued2016
dc.identifier.citationPiscia, R., Tabozzi, S., Bettinetti, R., Nevalainen, L., & Manca, M. M. (2016). Unexpected increases in rotifer resting egg abundances during the period of contamination of Lake Orta. <i>Journal of Limnology</i>, <i>75</i>(2s), 76-85. <a href="https://doi.org/10.4081/jlimnol.2016.1300" target="_blank">https://doi.org/10.4081/jlimnol.2016.1300</a>
dc.identifier.otherCONVID_25734086
dc.identifier.otherTUTKAID_70186
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/50195
dc.description.abstractDespite their ecological importance and rapid response to environmental changes, rotifers are rarely included in palaeolimnological studies. Here, we describe changes in abundance (ABD) and morphotype (MTs) diversity of rotifer resting eggs in the sediments of deep subalpine Lake Orta, Italy, covering a period prior to (pre-) 1926, during long-term ammonia and metal pollution from a rayon factory, and subsequent recovery of water quality. Following the pollution and bacterial oxidation of the ammonia, Lake Orta became the largest and deepest acid lake in Europe. Recovery of water quality followed both a ban on the discharge of industrial wastes, and a liming intervention in 1989 and 1990. We sectioned a sediment core collected from the deepest part of the lake (ORTA 07/2A) to provide a high time resolution, given the ca. 3-4 y cm–1 of sediment accumulation. Rotifer resting egg abundance and morphotypes were examined from the sediments and compared to limnological variables indicating the pollution. Rotifer resting egg abundance significantly increased with lake contamination (r=0.609 and -0.624 for copper and pH, respectively; P<0.001; n=27). A lake-water copper concentration threshold of ca. 40 µg L–1discriminated among pre-, during-, and post- pollution compositions of the rotifer morphotype assemblages. Diversity and morphotype richness increased during the recovery from copper pollution and with complete restoration from acidity, while abundance increased during pollution. The persistence of presumably viable Brachionus resting eggs and of hatched egg cases during the heavy pollution phase suggests that, unlike most other organisms, which were extirpated by the pollution of the lake, rotifers survived producing resting eggs, which secured future generations.
dc.language.isoeng
dc.publisherPAGEPress
dc.relation.ispartofseriesJournal of Limnology
dc.subject.otherpaleo-ecotoxicology
dc.subject.otherdiapause
dc.subject.otherLake Orta
dc.subject.othercopper and ammonia pollution
dc.titleUnexpected increases in rotifer resting egg abundances during the period of contamination of Lake Orta
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201606062903
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosDepartment of Biological and Environmental Scienceen
dc.contributor.oppiaineAkvaattiset tieteetfi
dc.contributor.oppiaineAquatic Sciencesen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-06-06T11:08:41Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.format.pagerange76-85
dc.relation.issn1129-5767
dc.relation.numberinseries2s
dc.relation.volume75
dc.type.versionpublishedVersion
dc.rights.copyright© the Authors, 2016. This is an open access article published by PAGEPress and distributed under a Creative Commons Attribution NonCommercial 4.0 License.
dc.rights.accesslevelopenAccessfi
dc.subject.ysorataseläimet
jyx.subject.urihttp://www.yso.fi/onto/yso/p12643
dc.rights.urlhttp://creativecommons.org/licenses/by-nc/4.0/
dc.relation.doi10.4081/jlimnol.2016.1300


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© the Authors, 2016. This is an open access article published by PAGEPress and distributed under a Creative Commons Attribution NonCommercial 4.0 License.
Except where otherwise noted, this item's license is described as © the Authors, 2016. This is an open access article published by PAGEPress and distributed under a Creative Commons Attribution NonCommercial 4.0 License.