Effects of ultraviolet radiation and nutrients on the structure-function of phytoplankton in a high mountain lake

Korbee, Nathalie; Carrillo, Presentación; Mata, Teresa M.; Rosillo, Silvia; Medina‐Sánchez, Juan Manuel; Figueroa, Félix L.

doi:10.1039/c2pp05336e

Cited by 28 publications

(28 citation statements)

References 83 publications

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“…In the red alga Gracilaria lemaneiformis, UV-induced inhibition of photosynthesis and growth was exacerbated under P-limited conditions, but the presence of UVR enhanced the activity of total carbonic anhydrase in the thalli and raised the photosynthetic affinity for exogenous inorganic carbon (Xu & Gao 2009). In contrast, Carrillo et al (2008) and Korbee et al (2012) reported that addition of P to a high mountain lake resulted in enhanced UVR impacts.…”

Section: Nutrient−uvb Interactionsmentioning

confidence: 94%

Interactive effects of nutrient supply and other environmental factors on the sensitivity of marine primary producers to ultraviolet radiation: implications for the impacts of global change

Beardall¹,

Stojkovic²,

Gao

2014

Aquat. Biol.

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Understanding the effects of global climate change on the algae that form the basis of most aquatic food chains is of paramount importance in our ability to make informed decisions about the future of production systems, marine ecosystems, and the global carbon cycle. Despite the Montreal Protocol to restrict the release of harmful chlorofluorocarbons into the atmosphere, ozone levels have not recovered at all latitudes, and in some regions levels of UVB are still rising due to interactions with phenomena related to climate change. However, the effects of UV radiation may be modulated by other environmental changes. In this review, we discuss how factors such as elevated CO 2 and ocean acidification, increasing temperature, and reduced nutrient supply associated with enhanced stratification can interact with UV radiation to affect algal physiological performance and growth. For instance, nutrient limitation enhances UV-induced inhibition due to the reduced capacity of algae to screen out UVB and/or impairment of their capacity to repair damage. Higher temperatures tend to promote repair more than photochemical damage so result in a net reduction of UV inhibition. Elevated CO 2 and ocean acidification has complex interactions with UV radiation, with mixed net outcomes for algal productivity. Differential effects of UVA and UVB have been shown to depend on their irradiance levels; while moderate levels of UVA stimulate growth and photosynthesis of some algae, UVB almost always results in harm to marine primary producers.

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Section: Nutrient−uvb Interactionsmentioning

confidence: 94%

Interactive effects of nutrient supply and other environmental factors on the sensitivity of marine primary producers to ultraviolet radiation: implications for the impacts of global change

Beardall¹,

Stojkovic²,

Gao

2014

Aquat. Biol.

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“…On the other hand, stratification traps phytoplankton populations in surface layers, increasing the light available for growth, but also exposing them to higher levels of ultraviolet radiation (UVR,. In this regard, it has been widely reported that greater exposure to UVR exerts an inhibitory effect on autotrophic and heterotrophic organisms (Häder et al, 2011), and that UV-B (280-315 nm), in particular, harms primary and bacterial production , enzymatic activity (Korbee et al, 2012), and cell viability , among other effects. However, it has been also reported Medina-Sánchez et al, 2002;) that UVR does not produce negative effects and it can even stimulate bacterial production and photosynthetic activity.…”

Section: P Carrillo Et Al: Synergistic Effects Of Uvr and Simulatedmentioning

confidence: 99%

“…It has also been demonstrated that UVR exposure in the upper layers of the water column can increase the proportion of photosynthate released as exudates (Carrillo et al, 2008;Korbee al., 2012), which would stimulate the growth of UVR-resistant bacteria (Xenopoulos and Schindler, 2003) and give rise to a coupled phytoplankton-bacteria relationship in clear oligotrophic lakes . Coupling between phytoplankton and bacterioplankton has been defined as the capacity of the carbon (C) released by phytoplankton to support the bacterial carbon requirement (Morán et al, 2002) and will therefore differ depending on (i) the availability of alternative (allochthonous or autochthonous) carbon sources (Gasol et al, 2009) and (ii) the supply of inorganic nutrients (Medina-Sánchez et al, 2010;López-Sandoval et al, 2011).…”

Section: P Carrillo Et Al: Synergistic Effects Of Uvr and Simulatedmentioning

confidence: 99%

Synergistic effects of UVR and simulated stratification on commensalistic phytoplankton–bacteria relationship in two optically contrasting oligotrophic Mediterranean lakes

et al. 2015

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Abstract. An indirect effect of global warming is a reduction in the depth of the upper mixed layer (UML) causing organisms to be exposed to higher levels of ultraviolet (UVR, 280-400 nm) and photosynthetically active radiation (PAR, 400-700 nm). This can affect primary and bacterial production as well as the commensalistic phytoplankton-bacteria relationship. The combined effects of UVR and reduction in the depth of the UML were assessed on variables related to the metabolism of phytoplankton and bacteria, during in situ experiments performed with natural pico-and nanoplankton communities from two oligotrophic lakes with contrasting UVR transparency (high-UVR versus low-UVR waters) of southern Spain. The negative UVR effects on epilimnetic primary production (PP) and on heterotrophic bacterial production (HBP), intensified under increased stratification, were higher in the low-UVR than in the high-UVR lake, and stronger on the phytoplanktonic than on the heterotrophic bacterial communities. Under UVR and increased stratification, the commensalistic phytoplankton-bacteria relationship was strengthened in the high-UVR lake where excretion of organic carbon (EOC) rates exceeded the bacterial carbon demand (BCD; i.e., BCD : EOC(%) ratio < 100). This did not occur in the low-UVR lake (i.e., BCD : EOC(%) ratio > 100). The greater UVR damage to phytoplankton and bacteria and the weakening of their commensalistic interaction found in the low-UVR lake indicates that these ecosystems would be especially vulnerable to UVR and increased stratification as stressors related to global climate change. Thus, our findings may have important implications for the carbon cycle in oligotrophic lakes of the Mediterranean region.

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“…Detailed investigations of the specificity of high mountain lakes is undertaken by various scientific disciplines (Choiński et al 2015). The research concerns both the biological (Korbee et al 2012;Kosolapova 2012;Degefu and Shagerl 2015) as well as physical-chemical and physical and chemical aspects (Tanaka and Tominaga 1994;Rodríguez-Rodríguez et al 2004;Santolaria et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of North Atlantic Oscillation on the hydrological conditions of Lake Morskie Oko (Carphatian Mountains)

Wrzesiński

Choiński

Ptak

2016

Bulletin of Geography. Physical Geography Series

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Abstract. The paper presents the effect of North Atlantic Oscillation of macroscale atmospheric circulation (NAO) on the hydrological conditions of Lake Morskie Oko located at an altitude of 1392.8 m a.s.l. in the highest range of the Carpathians. The paper applied detailed hydrometric information from the years 1971-2010 concerning water level fluctuations, water temperature, terms of the commencement and end of ice phenomena and ice cover, as well as meteorological data concerning air temperature and atmospheric precipitation, and monthly and seasonal NAO indices. The performed analysis suggests that the majority of analysed hydrological characteristics of Lake Morskie Oko was not prone to variability of NAO intensity in its various phases. The situation results from the local conditions, particularly responsible for the course of processes and phenomena in Lake Morskie Oko, simultaneously obscuring the effect of macroscale factors.

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Effects of ultraviolet radiation and nutrients on the structure-function of phytoplankton in a high mountain lake

Cited by 28 publications

References 83 publications

Interactive effects of nutrient supply and other environmental factors on the sensitivity of marine primary producers to ultraviolet radiation: implications for the impacts of global change

Interactive effects of nutrient supply and other environmental factors on the sensitivity of marine primary producers to ultraviolet radiation: implications for the impacts of global change

Synergistic effects of UVR and simulated stratification on commensalistic phytoplankton–bacteria relationship in two optically contrasting oligotrophic Mediterranean lakes

Effect of North Atlantic Oscillation on the hydrological conditions of Lake Morskie Oko (Carphatian Mountains)

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