Decomposition analysis of LTREs may facilitate the design of short-term ecotoxicological tests

2012
journal article
article
2
dc.abstract.otherThis study compared two methods, based on re-analyzed data from a partly published life table response experiment (LTRE), to help determine the optimal approach for designing ecotoxicological assessments. The 36-day LTRE data recorded the toxic effects of cadmium (Cd) and imidacloprid, alone and in combination, on the reproduction and survivorship of aphids (Acyrthosiphon pisum Harris). We used this data to construct an age-classified matrix model (six age classes, each 6 days long) to estimate aphid population growth rate (lambda) under each treatment. For each treatment, an elasticity analysis and a demographic decomposition analysis were performed, and results were compared. Despite different results expected from the two toxicants, the elasticity values were very similar. The elasticity of lambda with respect to survival was highest in the first age class, and that with respect to fertility was highest in the second age class. The demographic decomposition analysis examined how changes in life-history traits contributed to differences in lambda between control and treated populations (Delta lambda). This indicated that the most important contributors to Delta lambda were the differences in survival (resulting from both demographic sensitivity and toxicity) in the first and the second age classes of aphids and differences in fertility in the third and the fourth age classes. Additionally, the toxicants acted differently. Cd reduced Delta lambda by impairing fertility at third age class and reducing survivorship from the second to the third age class. Imidacloprid mostly reduced survivorship at the first and second age classes. The elasticity and decomposition analyses showed different results, because these methods addressed different questions about the interaction of organism life history and sensitivity to toxicants. This study indicated that the LTRE may be useful for designing individual-level ecotoxicological experiments that account for both the effects of the toxicant and the demographic sensitivity of the organism.pl
dc.affiliationWydział Biologii i Nauk o Ziemi : Instytut Nauk o Środowiskupl
dc.contributor.authorHamda, Natnael Tesfaye - 186419 pl
dc.contributor.authorJevtić, Dragan M.pl
dc.contributor.authorLaskowski, Ryszard - 129868 pl
dc.date.accessioned2014-12-20T07:49:54Z
dc.date.available2014-12-20T07:49:54Z
dc.date.issued2012pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.number5pl
dc.description.physical1504-1512pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume21pl
dc.identifier.doi10.1007/s10646-012-0904-5pl
dc.identifier.eissn1573-3017pl
dc.identifier.issn0963-9292pl
dc.identifier.projectROD UJ / Ppl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/2369
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa*
dc.rights.licenceCC-BY
dc.rights.urihttps://creativecommons.org/licenses*
dc.share.typeinne
dc.subject.enlife table response experimentpl
dc.subject.endecomposition analysispl
dc.subject.enmatrix population modelpl
dc.subject.enAcyrthosiphon pisumpl
dc.subject.enelasticitypl
dc.subject.enecotoxicological assayspl
dc.subtypeArticlepl
dc.titleDecomposition analysis of LTREs may facilitate the design of short-term ecotoxicological testspl
dc.title.journalEcotoxicologypl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.otherpl
This study compared two methods, based on re-analyzed data from a partly published life table response experiment (LTRE), to help determine the optimal approach for designing ecotoxicological assessments. The 36-day LTRE data recorded the toxic effects of cadmium (Cd) and imidacloprid, alone and in combination, on the reproduction and survivorship of aphids (Acyrthosiphon pisum Harris). We used this data to construct an age-classified matrix model (six age classes, each 6 days long) to estimate aphid population growth rate (lambda) under each treatment. For each treatment, an elasticity analysis and a demographic decomposition analysis were performed, and results were compared. Despite different results expected from the two toxicants, the elasticity values were very similar. The elasticity of lambda with respect to survival was highest in the first age class, and that with respect to fertility was highest in the second age class. The demographic decomposition analysis examined how changes in life-history traits contributed to differences in lambda between control and treated populations (Delta lambda). This indicated that the most important contributors to Delta lambda were the differences in survival (resulting from both demographic sensitivity and toxicity) in the first and the second age classes of aphids and differences in fertility in the third and the fourth age classes. Additionally, the toxicants acted differently. Cd reduced Delta lambda by impairing fertility at third age class and reducing survivorship from the second to the third age class. Imidacloprid mostly reduced survivorship at the first and second age classes. The elasticity and decomposition analyses showed different results, because these methods addressed different questions about the interaction of organism life history and sensitivity to toxicants. This study indicated that the LTRE may be useful for designing individual-level ecotoxicological experiments that account for both the effects of the toxicant and the demographic sensitivity of the organism.
dc.affiliationpl
Wydział Biologii i Nauk o Ziemi : Instytut Nauk o Środowisku
dc.contributor.authorpl
Hamda, Natnael Tesfaye - 186419
dc.contributor.authorpl
Jevtić, Dragan M.
dc.contributor.authorpl
Laskowski, Ryszard - 129868
dc.date.accessioned
2014-12-20T07:49:54Z
dc.date.available
2014-12-20T07:49:54Z
dc.date.issuedpl
2012
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.numberpl
5
dc.description.physicalpl
1504-1512
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
21
dc.identifier.doipl
10.1007/s10646-012-0904-5
dc.identifier.eissnpl
1573-3017
dc.identifier.issnpl
0963-9292
dc.identifier.projectpl
ROD UJ / P
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/2369
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Udzielam licencji. Uznanie autorstwa
dc.rights.licence
CC-BY
dc.rights.uri*
https://creativecommons.org/licenses
dc.share.type
inne
dc.subject.enpl
life table response experiment
dc.subject.enpl
decomposition analysis
dc.subject.enpl
matrix population model
dc.subject.enpl
Acyrthosiphon pisum
dc.subject.enpl
elasticity
dc.subject.enpl
ecotoxicological assays
dc.subtypepl
Article
dc.titlepl
Decomposition analysis of LTREs may facilitate the design of short-term ecotoxicological tests
dc.title.journalpl
Ecotoxicology
dc.typepl
JournalArticle
dspace.entity.type
Publication
Affiliations

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