NDLI: Sharp differences in the δ13C values of organic matter and carbonate encrustations but not in ambient water DIC between two morphologically distinct charophytes

Content Provider	Springer Nature Link
Author	Pronin, E. Pełechaty, M. Apolinarska, K. Pukacz, A. Frankowski, M.
Copyright Year	2016
Abstract	The stable carbon isotope composition of the carbonate encrustations (δ13CCARB), organic matter (δ13CORG) and the dissolved inorganic carbon (δ13CDIC) in the ambient lake waters were analysed for two common but morphologically different and, thus, representing different growth forms of Chara species. We hypothesized that the relationships between δ13CCARB, δ13CORG and δ13CDIC are species specific and related to the different growth forms of the studied charophytes. For each species (Chara tomentosa and Chara globularis), 10 individuals and water samples from above the macrophytes were collected in five lakes at three sites per lake in mid-summer. Opposing shifts were found between δ13CCARB and δ13CDIC values with 13C enrichment in C. tomentosa and 13C depletion in C. globularis. In addition, C. globularis exhibited more negative values of δ13CORG than C. tomentosa, even under similar conditions. The δ13CCARB and δ13CORG values were positively correlated in both species, but δ13CCARB and δ13CDIC as well as δ13CORG and δ13CDIC were positively correlated in C. tomentosa only. The differences found result from the different proportions between 13C and 12C in DIC used as a CO2 source for photosynthesis, which is linked to the different growth forms represented by the two studied charophytes and, thus, are species specific as we hypothesized.
Starting Page	177
Ending Page	191
Page Count	15
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	773
Issue Number	1
e-ISSN	15735117
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-02-24
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Stable isotopes C O Characeae Organic matter Carbonate Encrustation Freshwater & Marine Ecology Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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