8273

• UCREFRP Catalog Number: 8273
• Author: U.S. Bureau of Reclamation, U.S. Fish and Wildlife Service, U.S. Geological Survey and U.S. Bureau of Indian Affairs.
• Title: Guidelines for Interpretation of the Biological Effects of Selected Constituents in Biota, Water, and Sediment.
• USFW Year: 1998.
• USFW - Doc Type: \
• Copyright Material: NO

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Arsenic

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Table 2.-Biologlcal effects of various waterborne arsenicals
on selected species In aquatic environments
[dw, dry weight; ww, wet weight. See Appendix II for explanation of other abbreviations and technical terms]

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Concentration
in water
Species As compound ("gIL) Effects Reference
Aquatic plants
Algae, various As (V) 75 Decreased growth Eisler 1988
species
Alga (Ankistrodesmus As (V) 260 14-day EC50; inhibited growth
falcatus)
Alga (Scenedesmus As (V) 48 14-day EC50; inhibited growth
obliquus)
Alga (Selenastrum As (V) 690 4-day EC50; inhibited growth
capricomutum)
Stoneworts (Chara Total As <10 As in biomass 34(}-400 mgJkg (dw) Tanner and
corallina) Clayton 1990
Aquatic Invertebrates
Amphipod As (III) 88 28-day LC20 Eisler 1988
( Gammarus
pseudolimnaeus) 1,000 Significant reduction in survival after Spehar et al.
7 days 1980
Disodium methyl- 85 28-day LC10 Eisler 1988
arsenate
Sodium dimethyl- 850 28-day LCO
arsenate
Cladoceran (Daphnia As (III) 600-1,320 MATC' Eisler 1988
magna)
960 28-day LC5
As (V) 520 Reproductive impairment of 16% in Eisler 1988,
3 weeks (at pH 7.74) SJVDP 1990
930 28-day LC5. Maximum BCF of 219 Eisler 1988
Total As 1,000 18% decrease in body weight in Eisler 1988
3 weeks
1 ,400 50% reproductive impairment in
3 weeks
2,800 21-day LC50
Cladoceran (Daphnia As (III) 1,300 96-h LC50 Eisler 1988
puleX)
Midge larvae As (III) 680 48-h LC50 Khangarot and
(Chironomus ten tans) 1,310 24-h LCSO Ray 1989

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