The calcareous tubeworm Spirorbis spirorbis is a widespread serpulid species in the Baltic Sea, where it commonly grows as an epibiont on brown macroalgae (genus Fucus). It lives within a Mg-calcite shell and could be affected by ocean acidification and temperature rise induced by the predicted future atmospheric CO2 increase. However, Spirorbis tubes grow in a chemically modified boundary layer around the algae, which may mitigate acidification. In order to investigate how increasing temperature and rising pCO2 may influence S. spirorbisshell growth we carried out four seasonal experiments in the Kiel Outdoor Benthocosms at elevated pCO2 and temperature conditions. Compared to laboratory batch culture experiments the benthocosm approach provides a better representation of natural conditions for physical and biological ecosystem parameters, including seasonal variations. We find that growth rates of S. spirorbis are significantly controlled by ontogenetic and seasonal effects. The length of the newly grown tube is inversely related to the initial diameter of the shell. Our study showed no significant difference of the growth rates between ambient atmospheric and elevated (1100 ppm) pCO2 conditions. No influence of daily average CaCO3 saturation state on the growth rates of S. spirorbis was observed. We found, however, net growth of the shells even in temporarily undersaturated bulk solutions, under conditions that concurrently favoured selective shell surface dissolution. The results suggest an overall resistance of S. spirorbis growth to acidification levels predicted for the year 2100 in the Baltic Sea. In contrast, S. spirorbis did not survive at mean seasonal temperatures exceeding 24 °C during the summer experiments. In the autumn experiments at ambient pCO2, the growth rates of juvenile S. spirorbis were higher under elevated temperature conditions. The results reveal that S. spirorbis may prefer moderately warmer conditions during their early life stages but will suffer from an excessive temperature increase and from increasing shell corrosion as a consequence of progressing ocean acidification.
The Freshwater Animal Diversity Assessment (FADA) database contains authoritative species lists for several taxonomic groups and distribution data at the level of faunistic regions. This dataset contains the Glasby, C. " Timm, T., 2016 December 15, World checklist of freshwater Polychaeta species. World Wide Web electronic publication. Available online at http://fada.biodiversity.be/group/show/11. It has been updated based on Glasby, Christopher J., Timm, Tarmo, Muir, Alexander I., Gil, João (2009): Catalogue of non-marine Polychaeta (Annelida) of the World. Zootaxa 2070: 1-52, DOI: 10.5281/zenodo.187085.
Here, we examine the ecosystem ramifications of changes in sediment-dwelling invertebrate bioturbation behaviour—a key process mediating nutrient cycling—associated with nearfuture environmental conditions (+ 1.5 °C, 550 ppm [pCO2]) for species from polar regions experiencing rapid rates of climate change.
This dataset is included in the OA-ICC data compilation maintained in the framework of the IAEA Ocean Acidification International Coordination Centre (see https://oa-icc.ipsl.fr). Original data were downloaded from Polar Data Centre (see Source) by the OA-ICC data curator. In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2024) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2024-07-11.
The Freshwater Animal Diversity Assessment (FADA) database contains authoritative species lists for several taxonomic groups and distribution data at the level of faunistic regions. This dataset contains the Nematomorpha checklist "Martin, P., Martinez-Ansemil E., Pinder, A., Timm T. and Wetzel, M.J., 2016 December 15, World checklist of freshwater Oligochaeta species. World Wide Web electronic publication. Available online at http://fada.biodiversity.be/group/show/12 ".
Gegenstand des Projektes ist die Untersuchung der Biodiversitaet der Polychaeten im Suedpolarmeer. Die existierenden faunistischen und zoogeographischen Daten sowie die taxonomische Literatur soll zu weiterfuehrenden Studien ueber die Zusammensetzung der Polychaetenfauna in hoch- und subantarktischen Lebensgemeinschaften genutzt werden, um die Abhaengigkeit der Diversitaet und Dominanz von biotischen und abiotischen Umweltfaktoren wie Substrat, Wassertiefe, Wasserstroemung und Sedimenttransport, Nahrungszufuhr u.a. zu ermitteln. Neben der Artenzusammensetzung sollen, soweit moeglich, auch Lebensformtypen charakterisiert werden, wie Ernaehrungstypen (z.B. Filtrierer, Raeuber), vagile bzw. sessile Lebensweise und Tiefe der Roehren und Gaenge von sessilen Arten im Sediment. Diese Fragestellungen zielen auf eine Dokumentation der Nutzung oekologischer Nischen, besonders in groesseren Tiefen des Suedpolarmeeres. Schliesslich soll geklaert werden, ob sich die antarktische und subantarktische Polychaetenfauna hinsichtlich der numerisch dominanten Familien von anderen Tiefseegemeinschaften unterscheidet.