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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10606 - Microbiology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Phycology

ISSN

0022-3646

e-ISSN

—

Svazek periodika

53

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

1241-1254

Kód UT WoS článku

000417204400010

EID výsledku v databázi Scopus

2-s2.0-85029219611