Please use this identifier to cite or link to this item:
|Statistics||SHARE CORE MendeleyBASE||
|Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL|
Effects of fixation on freshwater invertebrate carbon and nitrogen isotope composition and its arithmetic correction.
|Authors:||Ventura, Marc ; Jeppesen, Erik|
|Citation:||Hydrobiologia 632(1) : 297-308 (2009)|
|Abstract:||Retrospective investigations using carbon and nitrogen stable isotope composition of archived material have a great potential for describing past effects of anthropogenic ecosystem alterations or natural shifts in ecosystems. In this study, we examined the effects of two commonly used preservation substances of freshwater invertebrates, ethanol and lugol, on d 13 C and d 15 N of various planktonic and benthic taxa. For both isotopes, the average effect of ﬁxation in ethanol was stronger than in lugol, and the effects on d 13 C were stronger than on d 15 N (average ± SD: 1.18 ± 0.94 and -0.47 ± 0.99 for d 13 C ethanol and lugol ﬁxed samples, respectively, and 0.39 ± 0.68 and 0.17 ± 0.77 for d 15 N, respectively). The changes in the isotopic composition were not dependent on the initial isotopic composition of each taxon, but were related with concomitant changes in the carbon or nitrogen content. Application of a mass balance correction equation to the ﬁxed samples resulted in a signiﬁcantly lower average effect of ﬁxation in ethanol (0.01 ± 0.59 and 0.44 ± 0.65 for d 15 N and d 13 C, respectively), while corrections had little effect for lugol ﬁxed samples (0.24 ± 0.53 and -0.39 ± 0.85, respectively). For both isotopes and ﬁxatives, corrections resulted in linear relationships between ﬁxed vs. control samples, with slopes and intercepts not signiﬁcantly different from 1 and 0, respectively. Therefore, mass balance correction of stable isotopes in ﬁxed invertebrates is recommended for minimising the effects of ﬁxation.|
|Description:||12 páginas, 5 figuras, 2 tablas.|
|Publisher version (URL):||http://dx.doi.org/10.1007/s10750-009-9852-3|
|Appears in Collections:||(CEAB) Artículos|
Files in This Item:
There are no files associated with this item.