Catchment properties and the photosynthetic trait composition of freshwater plant communities

Autor: Thomas Sand Jespersen, Anders Winkel, Stephen C. Maberly, S. J. Moe, Lars Baastrup-Spohr, Tenna Riis, Daniel Gebler, Patricia A. Chambers, A. B. Hinke, O. Vestergaard, Ole Pedersen, Laura Sass, Tõnu Feldmann, Lars Iversen, Annette Baattrup-Pedersen, Janne Alahuhta, Kaj Sand-Jensen, Frauke Ecke, Peter Brodersen, Jani Heino, Sebastian Birk
Jazyk: angličtina
Předmět:
hiilidioksidi
0106 biological sciences
Aquatic Organisms
climate changes
aquatic plants
hiili
vesi
01 natural sciences
yhteyttäminen
chemistry.chemical_compound
Photosynthesis
freshwater
0303 health sciences
Multidisciplinary
plants
diffusion
food and beverages
Adaptation
Physiological
communities
kasviyhdyskunnat
kasvihuonekaasut
environmental changes
Environmental chemistry
Carbon dioxide
Trait
articles
päästöt
Biologie
ympäristönmuutokset
bikarbonaatit
Bicarbonate
water
chemistry.chemical_element
010603 evolutionary biology
Ecology and Environment
03 medical and health sciences
Magnoliopsida
diffuusio (fysikaaliset ilmiöt)
Rivers
Aquatic plant
greenhouse gases
kasvit
030304 developmental biology
carbon
trait composition
emissions
carbon capture and storage
Plant community
ilmastonmuutokset
15. Life on land
Carbon Dioxide
plant communities
Bicarbonates
Lakes
chemistry
13. Climate action
makea vesi
Adaptation
hiilidioksidin talteenotto ja varastointi
Carbon
Zdroj: 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, no. 6467, pp. 878-881 . https://doi.org/10.1126/science.aay5945
Science
ISSN: 1095-9203
0036-8075
DOI: 10.1126/science.aay5945
Popis: 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. 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
Databáze: OpenAIRE
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