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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Key value for chemical safety assessment

Additional information

Freshwater:

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 EC10 values 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

 

Marine:

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