Tolerance induction and succession in microalgae communities exposed to copper and atrazine

Gustavson, Kim; Wängberg, Sten-Åke

doi:10.1016/0166-445x(95)00002-l

Cited by 93 publications

(47 citation statements)

References 27 publications

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“…Studies by Gustavson and Wangberg [18] have indicated that copper can exert a selective pressure on aquatic micro-organisms to favour more tolerant species. The concentration-PSII yield curves describe the community tolerance distribution [26], and the differences between the short-term response curves reflect the changes brought about by the long-term pre-exposure to copper.…”

Section: Discussionmentioning

confidence: 99%

“…Copper concentration was reduced to minimize effects from blank culture media. Zinc concentration was reduced to minimize possible co-tolerance effects [18]. The medium was prepared in 0.45 μm-filtered seawater (taken from the Indian Ocean), adjusted with deionised water to 10 ‰ salinity (mean salinity at the study site during wet season).…”

Section: B Culture Mediamentioning

confidence: 99%

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PSII Activity as An Ecological Indicator for Assessing Impact from Variable Exposure at Community-Level

Khun¹,

Oldham²,

Evans³

2013

IJBBB

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Abstract-Protection of ecological health of aquatic ecosystems is a primary focus of water quality programs globally. Of special concern is the degradation impact from urban stormwater. Urban storm runoff is highly variable in both physical and chemical stressors, and can impact by changing the structure and physiology of ecological communities. We propose the use of photosystem II (PSII) activity of local periphyton communities for detecting impacts on the ecological health of aquatic ecosystems. This study evaluated the sensitivity of PSII response of periphyton communities to environmental stress in the field and stress (copper toxicity) simulated in the laboratory. The field study was done on natural periphyton communities at two sites in the Swan River estuary, Western Australia receiving urban stormwater discharge. Natural community at a non-receiving upstream site was used as the control. The laboratory study involved a chronic and an acute exposure to copper using periphyton community collected at the control upstream site. Both the laboratory and field studies indicated that PSII response was a sensitive indicator to the different exposures than the response in biomass, chlorophyll a content, or in-vivo chlorophyll fluorescence. Response in PSII also correlated strongly with the structural changes of the communities in total individuals (N) and species number (S) (Pearson's coefficient 0.9 at sig < 0.01). Communities pre-exposed to chronic copper, exhibited enhanced PSII activity that correlated positively with the increased community tolerance to copper toxicity. The PSII activity of communities receiving urban stormwater was indicative of the stormwater quality in that lower activity corresponded to poorer water quality. The results demonstrated that community PSII response to be sufficiently sensitive to environmental stress, including urban stormwater that is episodic and highly variable.Index Terms-PSII quantum yield, periphyton community, ecological impact, variable exposure, urban stormwater.

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Section: Discussionmentioning

confidence: 99%

Section: B Culture Mediamentioning

confidence: 99%

PSII Activity as An Ecological Indicator for Assessing Impact from Variable Exposure at Community-Level

Khun¹,

Oldham²,

Evans³

2013

IJBBB

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“…Cette approche a été appliquée sur les communautés algales (phytoplancton et périphyton), principalement en systèmes expérimentaux où le milieu étudié était artificiellement contaminé (DAHL et BLANCK, 1995GUSTAVSON et WÂNGBERG, 1995 ;MOLANDER et BLANCK, 1992 ;MOLANDER et al, 1990 BLANCK, 1990). Quelques études plus rares ont été abordées en milieu naturel sur des pesticides antisalissures et sur des métaux lourds BLANCK et DAHL, 1998 ;WÂNGBERG, 1995).…”

Section: Déstructuration Sélection Et Résistance Des Communautés Algunclassified

“…Quelques études plus rares ont été abordées en milieu naturel sur des pesticides antisalissures et sur des métaux lourds BLANCK et DAHL, 1998 ;WÂNGBERG, 1995). Cette méthode pose encore de sérieux problèmes techniques dans le choix d'un test global permettant de détecter la résistance des communautés et dans le choix de toxiques judicieux à étudier (NYSTRÔM, 1997), mais la méthode PICT est un outil écotoxicologi-que original ayant un degré de signification écologique important et présente un intérêt indéniable comme indice de pollution spécifique basé sur les communautés algales.…”

Section: Déstructuration Sélection Et Résistance Des Communautés Algunclassified

“…Ces travaux ont porté sur l'effet de ces contaminants sur la croissance et la physiologie de certaines algues, généralement grâce à des cultures d'espèces isolées ou associées en laboratoire (ABOU-WALY étal., 1991 ;MAYASICH et al, 1987 ;PETERSON et al, 1994). D'autres études en laboratoire (BRYFOGLE et MCDIFFETT, 1979; HAMALA et KOLLIGT, 1985), en microcosmes ou mésocosmes (BÉRARD et PELTE, 1996;DE NOYELLES étal., 1982 ;GUSTAVSON et WÂNGBERG, 1995 ;HAMILTON étal., 1988 ) se sont davantage intéressées à l'impact des herbicides inhibiteurs de la photosynthèse sur les peuplements algaux. Le but de ces études était donc d'évaluer les perturbations que ces polluants peuvent induire sur la structure des communautés algales.…”

Section: -Introductionunclassified

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Les herbicides inhibateurs du photosystème II, effets sur les communautés algales et leur dynamique

Bérard¹,

Pelte

2005

rseau

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Nous présentons une revue bibliographique à propos des effets des herbicides inhibiteurs du Photosystème II (PS II) sur les communautés algales. Ces herbicides sont abondamment utilisés dans les pratiques phytosanitaires. Ils sont susceptibles de contaminer les milieux aquatiques et, étant donné leur mode d'action inhibitrice de la photosynthèse, ils peuvent agir directement sur les algues. De nombreuses études ont été réalisées afin d'évaluer l'impact des contaminations par ces herbicides sur les microphytes, en particulier leur effet sur la croissance et la physiologie de certaines algues (monocultures en laboratoire). D'autres études expérimentales et quelques rares in situ, ont porté sur l'impact des herbicides inhibiteurs de la photosynthèse sur la structure des peuplements algaux. Certaines tendances ont pu être ainsi dégagées quant à la sensibilité et la résistance aux herbicides des différentes espèces étudiées soit isolément, soit au sein des peuplements. Les herbicides inhibiteurs du PS II perturbent effectivement la structure des peuplements phytoplanctoniques de façon plus ou moins marquée. L'impact des herbicides sur les algues est variable selon la structure des peuplements (liée aux successions) et les paramètres environnementaux, notamment liés à la saison. Nous devons donc développer nos connaissances à propos des interactions entre toxiques et facteurs environnementaux sur des pas de temps correspondant non seulement aux rythmes des contaminations mais aussi aux rythmes des succesions alagles, car ces interactions sont susceptibles de réduire ou d'amplifier les conséquences d'une pollution par ces toxiques dans les milieux aquatiques.The aim of this paper is to present a review about the impact of Photo system II (PS II) inhibitors on algae communities. A brief discussion of the use in agriculture, the different chemical families, the photosynthetic inhibition effect and the occurrence of these compounds in aquatics systems is followed by the presentation of the impacts these herbicides have on algae. Many studies investigate the effects of PS II inhibitors on algae growth and physiology. The response to pollutants were studied by monitoring changes in terms of different parameters : chlorophyll fluorescence induction usually increases with PS II inhibitors. Concentration of pigments decreases with PS II inhibitors, but increases sometimes with low contaminations of these toxicants (it is probably an homeostasis effect). Pigment ratio can change with herbicide exposure. Primary production (measured by 14C incorporation or dissolved O2) usually decreases with PS II inhibitors. But, the " excretion " of dissolved organic compounds may increase with PS II inhibitors. These herbicides may alter or change cell morphology of algae. In consequence algae growth is inhibited by PS II inhibitors exposure. But growth inhibition varies, depending on each species' (and strain) sensibility or resistance to each herbicide. By this way, PS II inhibitors can affect the algae community structure. In consequence, ...

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Combined and interactive effects of global climate change and toxicants on populations and communities

Moe

Schamphelaere

Clements

et al. 2012

Enviro Toxic and Chemistry

275

235

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Increased temperature and other environmental effects of global climate change (GCC) have documented impacts on many species (e.g., polar bears, amphibians, coral reefs) as well as on ecosystem processes and species interactions (e.g., the timing of predator–prey interactions). A challenge for ecotoxicologists is to predict how joint effects of climatic stress and toxicants measured at the individual level (e.g., reduced survival and reproduction) will be manifested at the population level (e.g., population growth rate, extinction risk) and community level (e.g., species richness, food-web structure). The authors discuss how population- and community-level responses to toxicants under GCC are likely to be influenced by various ecological mechanisms. Stress due to GCC may reduce the potential for resistance to and recovery from toxicant exposure. Long-term toxicant exposure can result in acquired tolerance to this stressor at the population or community level, but an associated cost of tolerance may be the reduced potential for tolerance to subsequent climatic stress (or vice versa). Moreover, GCC can induce large-scale shifts in community composition, which may affect the vulnerability of communities to other stressors. Ecological modeling based on species traits (representing life-history traits, population vulnerability, sensitivity to toxicants, and sensitivity to climate change) can be a promising approach for predicting combined impacts of GCC and toxicants on populations and communities. Environ. Toxicol. Chem. 2013;32:49–61. © 2012 SETAC

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Tolerance induction and succession in microalgae communities exposed to copper and atrazine

Cited by 93 publications

References 27 publications

PSII Activity as An Ecological Indicator for Assessing Impact from Variable Exposure at Community-Level

PSII Activity as An Ecological Indicator for Assessing Impact from Variable Exposure at Community-Level

Les herbicides inhibateurs du photosystème II, effets sur les communautés algales et leur dynamique

Combined and interactive effects of global climate change and toxicants on populations and communities

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