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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Many high quality studies are available in the database of toxicity to aquatic algae and cyanobacteria. A lumped data set for nickel-based compounds was considered for endpoint coverage. The lowest NOEC/EC10 valures were 12.6 µg Ni/L for freshwater algae and 96.7 µg Ni/L for marine algae.

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
12.6 µg/L
EC10 or NOEC for marine water algae:
96.7 µg/L

Additional information

Fresh water (Ni)


EC50values are available for many species and range from 58.8 µg Ni/L forChlamydymonas species(Deleebeeck et al., 2009a) and the highest EC50being 52300 µg Ni/L forAnacystis nidulans(Azeez and Banerjee, 1991).From the database of chronic nickel toxicity to freshwater algae, 58 individual NOEC’s are reported for 8 different algae species. NOEC/EC10values range from 12.3 μg/l forScenedesmus accuminatus(Deleebeeck et al., 2009a) to 425 μg/l forPseudokirchneriella subcapitata(Deleebeeck et al., 2009b).


 


The following table indicates those NOEC or EC10values of high quality that have been carried forward for the HC5-& PNEC derivation:


 































































Key Study


(freshwater algae)



Selected values for the most sensitive endpoints used for derivation of the freshwater HC5



Species



Endpoint



Value (s) (µg/L)



Deleebeecket al., 2009b



Pseudokirchneriella subcapitata



EC10



25.3-362



De Schamphelaere et al. (2006)



Pseudokirchneriella subcapitata



EC10



63.0-425



Deleebeecket al., 2009a



Chlamydomonas sp.



EC10



20.4-38.2



Ankistrodesmus falcatus



EC10



13.6-59.4



Scenedesmus accuminatus



NOEC



12.3



Chlorella



EC10



42.0



Desmodesmus spinosus



NOEC



22.5



Pediastrum duplex



EC10



20.1-28.2



Coelastrum microporum



EC10



41.2-51.8



 


Fluoride activity on algae


Fresh water, acute effect: EC50 96h on Selenastrum caprocornutum 132 mg/L of fluoride


Fresh water, chronic effect, 175 hours NOEC on Scenedesmus quadricauda 50mg/L fluoride


 


CONCLUSION NOEC Ni 12.6 µg/L (= NOEC NiF2 0.023 mg/L)


 


Marine (Ni):


Two high quality EC50values are available for species of marine algae, with the lowest EC50being 456 µg Ni/L forChampia parvula(DeForest and Schlekat, 2013) and the highest EC50being 4400 µg Ni/L forMacrocystic pyrifera(DeForest and Schlekat, 2013).From the database of chronic nickel toxicity to marine algae, EC10values are reported for different species.  EC10values range from 97 μg Ni/L for growth of giant kelp (Macrocystis pyrifera) (DeForest and Schlekat, 2013) to 17891 μg Ni/L for growth of the dinoflagellate,Dunaliella tertiolecta(DeForest and Schlekat, 2013). The table below indicates the NOEC or EC10values of high quality selected for derivation of HC5and the marine aquatic PNEC:


 







































Key Study


(marine algae)



Selected values for the most sensitive endpoints used for derivation of the marine HC5



Species



Endpoint



Value (s) (µg/L)



 DeForest and Schlekat, 2013



Macrocystis pyrifera



EC10



96.7



 DeForest and Schlekat, 2013



Champia parvula



EC10



144



 DeForest and Schlekat, 2013



Skelatonema costatum



EC10



316.5 (geomean)



 DeForest and Schlekat, 2013



Dunaliella tertiolecta



EC10



17,891



 


Fluoride activity on algae


Marine water, acute effect: EC50 96h on Skeletonema costatum 82 mg/L


Marine water, chronic effect 16 days NOEC 50 mg/L fluoride


 


CONCLUSION NOEC Ni 96.7 µg/L (= NOEC NiF2 0.159 mg/L)


 

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