Catchment properties and the photosynthetic trait composition of freshwater plant communities
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Iversen, L. L.; Winkel, A.; Baastrup-Spohr, L.; Hinke, A. B.; Alahuhta, J.; Baattrup-Pedersen, A.; Birk, S.; Brodersen, P.; Chambers, P. A.; Ecke, F.; Feldmann, T.; Gebler, D.; Heino, J.; Jespersen, T. S.; Moe, S. J.; Riis, T.; Sass, L.; Vestergaard, O.; Maberly, S. C.; Sand-Jensen, K.; Pedersen, O. (2019) Catchment properties and the photosynthetic trait composition of freshwater plant communities. Science Vol. 366, Issue 6467, pp. 878-881. https://doi.org/10.1126/science.aay5945
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| Title: | Catchment properties and the photosynthetic trait composition of freshwater plant communities |
| Author: | Iversen, L.L.; Winkel, A.; Baastrup-Spohr, L.; Hinke, A.B.; Alahuhta, J.; Baattrup-Pedersen, A.; Birk, S.; Brodersen, P.; Chambers, P. A.; Ecke, F; Feldmann, T.; Gebler, D.; Heino, J.; Jespersen, T. S.; Moe, S. J.; Riis, T.; Sass, L.; Vestergaard, O.; Maberly, S. C.; Sand-Jensen, K.; Pedersen, O. |
| Publisher: | American Association for the Advancement of Science |
| Date: | 2019 |
| Language: | en |
| Belongs to series: | Science Vol. 366, Issue 6467, pp. 878-881 |
| ISSN: | 0036-8075 |
| DOI: | https://doi.org/10.1126/science.aay5945 |
| URI: | http://hdl.handle.net/10138/340216 |
| Abstract: | Unlike in land plants, photosynthesis in many aquatic plants relies on bicarbonate in addition to carbon dioxide (CO2) to compensate for the low diffusivity and potential depletion of CO2 in water. Concentrations of bicarbonate and CO2 vary greatly with catchment geology. In this study, we investigate whether there is a link between these concentrations and the frequency of freshwater plants possessing the bicarbonate use trait. We show, globally, that the frequency of plant species with this trait increases with bicarbonate concentration. Regionally, however, the frequency of bicarbonate use is reduced at sites where the CO2 concentration is substantially above the air equilibrium, consistent with this trait being an adaptation to carbon limitation. Future anthropogenic changes of bicarbonate and CO2 concentrations may alter the species compositions of freshwater plant communities. One sentence summary: The widespread photosynthetic trait of freshwater plants, bicarbonate use, has a global biogeography controlled by catchment characteristics |
| Description: | Change in plants as bicarbonate rises Freshwater plants can be broadly divided into two major categories according to their photosynthetic traits: Some use carbon dioxide as their carbon source, whereas others use bicarbonate. Iversen et al. found that the relative concentrations of these two inorganic carbon forms in water determine the functional composition of plant communities across freshwater ecosystems (see the Perspective by Marcé and Obrador). They created global maps revealing that community composition is structured by catchment geology and not climate (in contrast to the terrestrial realm, where the trait composition is structured by temperature and rainfall). Anthropogenic influences from land-use change are causing large-scale increases in bicarbonate concentrations in freshwater catchments and are thus leading to wholesale changes in the composition of their aquatic plant communities. |
| Subject: |
carbon dioxide
plants bicarbonates climate changes carbon emissions photosynthesis greenhouse gases water plant communities diffusion environmental changes carbon capture and storage trait composition freshwater communities |
| Subject (ysa): |
hiilidioksidi
kasvit bikarbonaatit ilmastonmuutokset hiili päästöt yhteyttäminen kasvihuonekaasut vesi kasviyhdyskunnat diffuusio (fysikaaliset ilmiöt) ympäristönmuutokset hiilidioksidin talteenotto ja varastointi makea vesi |
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