Differential effects of changes in spectral irradiance on photoacclimation, primary productivity and growth in Rhodomonas salina (Cryptophyceae) and Skeletonema costatum (Bacillariophyceae) in simulated blackwater environments

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F17%3A00483722" target="_blank" >RIV/61388971:_____/17:00483722 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1111/jpy.12578" target="_blank" >http://dx.doi.org/10.1111/jpy.12578</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jpy.12578" target="_blank" >10.1111/jpy.12578</a>

Result language

angličtina

Original language name

Differential effects of changes in spectral irradiance on photoacclimation, primary productivity and growth in Rhodomonas salina (Cryptophyceae) and Skeletonema costatum (Bacillariophyceae) in simulated blackwater environments

Original language description

The underwater light field in blackwater environments is strongly skewed toward the red end of the electromagnetic spectrum due to blue light absorption by colored dissolved organic matter (CDOM). Exposure of phytoplankton to full spectrum irradiance occurs only when cells are mixed up to the surface. We studied the potential effects of mixing-induced changes in spectral irradiance on photoacclimation, primary productivity and growth in cultures of the cryptophyte Rhodomonas salina and the diatom Skeletonema costatum. We found that these taxa have very different photoacclimation strategies. While S.costatum showed classical complementary chromatic adaption, R.salina showed inverse chromatic adaptation, a strategy previously unknown in the cryptophytes. Transfer of R.salina to periodic full spectrum light (PFSL) significantly enhanced growth rate () by 1.8 times and primary productivity from 0.88 to 1.35mg C(mg Chl(-1))h(-1). Overall, R.salina was less dependent on PFSL than was S.costatum, showing higher and net primary productivity rates. In the high-CDOM simulation, carbon metabolism of the diatom was impaired, leading to suppression of growth rate, short-term C-14 uptake and net primary production. Upon transfer to PFSL, of the diatom increased by up to 3-fold and carbon fixation from 2.4 to 6.0mg C(mg Chl(-1))h(-1). Thus, a lack of PFSL differentially impairs primarily CO2-fixation and/or carbon metabolism, which, in turn, may determine which phytoplankton dominate the community in blackwater habitats and may therefore influence the structure and function of these ecosystems.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10606 - Microbiology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Phycology

ISSN

0022-3646

e-ISSN

—

Volume of the periodical

53

Issue of the periodical within the volume

6

Country of publishing house

US - UNITED STATES

Number of pages

14

Pages from-to

1241-1254

UT code for WoS article

000417204400010

EID of the result in the Scopus database

2-s2.0-85029219611