Interactive effects of temperature and nutrient limitation on the response of alpine phytoplankton growth to ultraviolet radiation

Doyle, Shaina A.; Saros, Jasmine E.; Williamson, Craig E.

doi:10.4319/lo.2005.50.5.1362

Cited by 82 publications

(75 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4d-f). This finding is consistent with the ameliorating effect of moderate temperature increase on the net biological UVR effect reported on photosynthesis and growth of different phytoplankton species [25][26][27][28] and in the relatively higher germination capacity of UVR-exposed Alaria marginata zoospores at 15 • C compared to 10 • C. 32 Non-photochemical dissipation of excess light energy is a shortterm response, first-line defence and one of the most efficient protective mechanisms against photostress. 68, 69 Consequently, during 8 and 48 h measurements, we observed no consistent relationship between combined light and thermal stress and changes in light energy dissipation via a non-photochemical pathway; a similar response was observed in high-and low-light acclimated dinoflagellates subjected to thermal stress.…”

Section: Discussionsupporting

confidence: 86%

Photosynthetic response of Arctic kelp zoospores exposed to radiation and thermal stress

Roleda

2009

Photochem Photobiol Sci

View full text Add to dashboard Cite

Zoospores of Arctic kelp species, Alaria esculenta, Laminaria digitata and Saccharina latissima were exposed to different temperature (2 • C to 19 • C) and radiation (photosynthetically active radiation (PAR = P), PAR + UV-A (PA), and PAR + UV-A + UV-B (PAB)) conditions in the laboratory. Species-specific responses to the combined effect of light and temperature stress showed sensitivity in the order S. latissima > L. digitata > A. esculenta. The optimum temperature range for photosynthesis in different Arctic kelp species' zoospores was between 7-13 • C, temperatures higher than in the natural environment. Short-term response to increasing temperature was non-lethal while moderate temperature increase had an ameliorating effect on the overall biological effect of UVR; where the lowest photoinhibition was observed at 13 • C under PAB and higher photosynthetic recovery was observed in UVR-pre-exposed zoospores at 7-13 • C compared to 2 • C. Above the temperature optima, continued cultivation under high temperature had a negative impact on the recovery of photoinhibition. The higher capacity for non-photochemical quenching (NPQ) in A. esculenta and L. digitata helped to regulate and protect photosynthesis under light and temperature stress compared to S. latissima. The investigated Arctic kelp species may be able to locally survive under the influence of UVR at a certain range of temperature increase but the southernmost distribution range of the species may shift to higher latitudes; although natural selection may result in genotypes adapted to stressful environment.

show abstract

Section: Discussionsupporting

confidence: 86%

Photosynthetic response of Arctic kelp zoospores exposed to radiation and thermal stress

Roleda

2009

Photochem Photobiol Sci

View full text Add to dashboard Cite

show abstract

“…UVR inhibition is likely greater in cold waters, since enzymatically controlled repair mechanisms in cells are temperature-dependent in contrast to the photochemical damage by UVR (Milot-Roy & Vincent 1994, Doyle et al 2005. In the present study, primary production was substantially reduced in the presence of UVR in GKS (56% reduction of P tot ), followed by NYA (30% reduction of P tot ; Fig.…”

Section: Uvr Effects and Ecosystem Implicationssupporting

confidence: 54%

Effect of solar radiation on photosynthetic extracellular carbon release and its microbial utilization in alpine and Arctic lakes

Panzenböck

2007

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

The effect of solar radiation (photosynthetically active radiation and ultraviolet radiation [UVR]) on the photosynthetic extracellular release (PER) of phytoplankton and its utilization by bacterioplankton were studied in an alpine lake (Gossenköllesee, Austria) over a seasonal cycle. For comparison, 2 Arctic lakes on the Taymir Peninsula (Siberia) were investigated as well. The contribution of PER to primary production (% net PER) ranged between 0 and 95% (mean 32%) in Gossenköllesee (May 1999 to July 2000) following a seasonal trend that was inversely related to phytoplankton biomass. PER was released only under light conditions and was positively related to the intensity of solar radiation. During the ice-covered period, the % net PER increased, while total primary production (P tot ) decreased with experimentally increasing irradiance, indicating radiationinduced stress with dark-adapted phytoplankton. During the ice-free period, the increase of % net PER with increasing irradiance was independent of photoinhibition. The fraction of PER not immediately incorporated by bacteria (~60% of total PER) may be an important contribution to the generally low pool of dissolved organic carbon (DOC) in Gossenköllesee. At the Arctic site, net PER amounted to 21% of P tot in an ice-free lake and 51% in the ice-covered Lake Nyagamya. In all lakes, the amount of PER was sufficient to meet the bacterial carbon demand. The UVR-induced inhibition of primary production in the investigated lakes was inversely related to the DOC concentration of the water column, with the lowest effect in the ice-free Arctic lake (3.5% reduction of P tot ) and the highest impact in the alpine lake (56% reduction of P tot, 61% reduction of PER); the percentage of net PER was apparently not controlled by UVR. This suggests that the investigated alpine lake is more sensitive to changes in UVR than the Arctic lakes are. KEY WORDS: Primary production · PAR · UVR · Exudates · Carbon fluxResale or republication not permitted without written consent of the publisher

show abstract

“…For example, it has been found that the effect of UVBR may be temperature dependent because temperature enhances photo-enzymatic repair (Williamson et al 2002;MacFadyen et al 2004). Another study (Doyle et al 2005) has shown that the effect of UVBR on phytoplankton growth is not only temperature dependent but also nutrient dependent. Therefore, studying the response of the entire plankton food web to multiple stressors linked to global change with an emphasis on direct (i.e., physiological) and indirect (i.e., positive or negative feedbacks) effects of complex interactions is essential to evaluating how global change will modify the structure and function of aquatic systems.…”

mentioning

confidence: 99%

Effects of experimental warming and increased ultraviolet B radiation on the Mediterranean plankton food web

Vidussi

Mostajir

Fouilland

et al. 2010

Limnology & Oceanography

View full text Add to dashboard Cite

The responses of the plankton food web to increases in temperature and ultraviolet B radiation (UVBR, were experimentally investigated at a coastal Mediterranean site during spring. Eight moored mesocosms were used to compare natural plankton food web responses (control mesocosms) with three treatments simulating expected future local temperature and UVBR increases, as follows: (1) 3uC increase in water temperature, (2) 20% increase in incident UVBR, and (3) simultaneous 3uC increase in water temperature and 20% increase in incident UVBR. The plankton food web was resistant to elevated UVBR, having only moderate effects on plankton abundances and structure. In contrast, warming induced significant shifts in the plankton food web structure and function. Specifically, the abundance of protozooplankton (ciliates and flagellates) increased and the development time of copepods from nauplii to adults decreased. In the warm mesocosms, the emergence of copepod adult stages midway through the experiment resulted in a decrease in ciliates and consequently in an increase in heterotrophic flagellates. One unexpected result was that warming reduced the abundance of heterotrophic bacteria midway through the experiment. These results indicate a trophic-cascade effect under warming. The increase in adult copepods diminishes ciliates and in turn favors heterotrophic flagellates that consume bacteria. Warming also induced an increase in net oxygen production, indicating an increase in net primary production.

show abstract

Interactive effects of temperature and nutrient limitation on the response of alpine phytoplankton growth to ultraviolet radiation

Cited by 82 publications

References 28 publications

Photosynthetic response of Arctic kelp zoospores exposed to radiation and thermal stress

Photosynthetic response of Arctic kelp zoospores exposed to radiation and thermal stress

Effect of solar radiation on photosynthetic extracellular carbon release and its microbial utilization in alpine and Arctic lakes

Effects of experimental warming and increased ultraviolet B radiation on the Mediterranean plankton food web

Contact Info

Product

Resources

About