Bryozoan stable carbon and hydrogen isotopes: relationships between the isotopic composition of zooids, statoblasts and lake water

van Hardenbroek, Maarten Reinier; Leuenberger, Markus; Hartikainen, H.; Okamura, B.; Heiri, Oliver (2016). Bryozoan stable carbon and hydrogen isotopes: relationships between the isotopic composition of zooids, statoblasts and lake water. Hydrobiologia, 765(1), pp. 209-223. Springer 10.1007/s10750-015-2414-y

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We explored the extent to which δ13C and δD values of freshwater bryozoan statoblasts can provide information about the isotopic composition of zooids, bryozoan food and surrounding water. Bryozoan samples were collected from 23 sites and encompassed ranges of nearly 30‰ for δ13C and 100‰ for δD values. δ13C offsets between zooids and statoblasts generally ranged from −3 to +4.5‰, with larger offsets observed in four samples. However, a laboratory study with Plumatella emarginata and Lophopus crystallinus demonstrated that, in controlled settings, zooids had only 0–1.2‰ higher δ13C values than statoblasts, and 1.7‰ higher values than their food. At our field sites, we observed a strong positive correlation between median δ13C values of zooids and median δ13C values of corresponding statoblasts. We also observed a positive correlation between median δD values of zooids and statoblasts for Plumatella, and a positive correlation between median δD values of statoblasts and δD values of lake water for Plumatella and when all bryozoan taxa were examined together. Our results suggest that isotope measurements on statoblasts collected from flotsam or sediment samples can provide information on the feeding ecology of bryozoans and the H isotopic composition of lake water.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS) > Palaeoecology
08 Faculty of Science > Department of Biology > Institute of Plant Sciences (IPS)

UniBE Contributor:

van Hardenbroek, Maarten Reinier; Leuenberger, Markus and Heiri, Oliver

Subjects:

500 Science > 580 Plants (Botany)
500 Science > 530 Physics

ISSN:

0018-8158

Publisher:

Springer

Language:

English

Submitter:

Peter Alfred von Ballmoos-Haas

Date Deposited:

27 Jan 2016 13:04

Last Modified:

26 Aug 2019 09:14

Publisher DOI:

10.1007/s10750-015-2414-y

Related URLs:

Uncontrolled Keywords:

Freshwater Bryozoa; Stable isotopes; Statoblasts; Lakes; Feeding ecology; Palaeoecology

BORIS DOI:

10.7892/boris.74672

URI:

https://boris.unibe.ch/id/eprint/74672

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