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| Titel |
Effects of low-pH stress on shell traits of the dove snail, Anachis misera, inhabiting shallow-vent environments off Kueishan Islet, Taiwan |
| VerfasserIn |
Y. J. Chen, J. Y. Wu, C. T. A. Chen, L. L. Liu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 12, no. 9 ; Nr. 12, no. 9 (2015-05-05), S.2631-2639 |
| Datensatznummer |
250117923
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| Publikation (Nr.) |
 copernicus.org/bg-12-2631-2015.pdf |
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| Zusammenfassung |
| The effects of naturally acidified seawater on shell traits were quantified
through the comparison of dove snails (Family: Columbellidae) Anachis misera from vent
environments with Euplica sp. from non-vent sites in northeastern Taiwan. Samples of A. misera were collected around a shallow vent (24.8341° N,
121.96191° E), which included the east, south, southwest, and northwest
sites. An absence of Anachis snails was found in the most acidic north site (pH
7.19–7.25). Based on the similarities of protein expression profiles, the
Anachis snails were classified into two groups, i.e., V-South (pH 7.78–7.82) and
V-Rest (pH 7.31–7.83). Comparing their shell traits to the non-vent Euplica sp. from
Da-xi (DX) and Geng-fang (GF) (pH 8.1–8.2), a difference in shell shape (shell
width : shell length) was found, with the populations having more globular shells than
the non-vent ones. The means of shell width were significantly
different among sites (p < 0.01), with a descending order of GF
> DX > V-South and V-Rest. The relationships of shell
length to total weight were curvilinear for both Anachis and Euplica snails. The
logarithmically transformed slopes differed significantly among sites, and the
mean body weight of the GF population was greater than that of the others
(p < 0.01). Positive correlations between shell length and shell
thickness of body whorl (T1) and penultimate whorl (T2) were only observed
in non-vent GF and DX populations. Anachis snails from vent sites were thinner in
T1 and T2 compared to the Euplica snails from non-vent sites (p < 0.05).
Within each vent group, shell thickness between T1 and T2 was
insignificantly different. Between vent groups, T1 and T2 from V-Rest showed
a decrease of 10.6 and 10.2%, respectively, compared to V-South ones.
The decrease of T1 and T2 between vent Anachis snails and non-vent Euplica snails was as
great as 55.6 and 29.0%, respectively. This was the first study to
compare snail's morphological traits under varying shallow-vent stresses
with populations previously classified by biochemical responses. Overall, the
shallow-vent-based findings provide additional information from subtropics
on the effects of acidified seawater on gastropod snails in natural
environments. |
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