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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Boron

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Table 7.-Summary of literature for boron ecotoxicology
[LCSO, median lethal concentration; LDSO, median lethal dose; both indicate 50 percent mortality after a stated time interval.
Similarly, LC100 denotes 100 percent mortality. dw, dry weight; bw, body weight: conc., concentrationl

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Boron
Species compound Concentration Test conditions Effect Reference
Plants
Blue-green Boric acid 75-100 mg BIL 72 hours Photosynthetic pigments Martinez et al.
algae depleted 1986; Mateo
(Anacystis et af. 1987
nidulans) .
Duckweed Boric acid 100 mg BIL pH 5.0 Growth inhibited Frick 1985
(Lemna minot) 20 mg BIL pH 7.0 Growth inhibited
Waterweed Boric acid 1 mg BIL 28 d Reduced photosynthesis Perry et al.
(Elodea 1994
canadensis)
Invertebrates
Mosquito Boric acid 700-2,797 mg Freshly hatched to LC100 (48 hr) EPA 1975
larvae (3 spp.) BIL pupae stages
Midge Borax 1 ,376 mg BIL Fourth instar LCSO (48 hr) Maier and
( Chironomus Knight 1991
decorus) 20 mg BIL Decrease in growth Significant decrease in
(96 hr) growth rate
Water flea Boric acid 420 mg/L Neonates LC100 (48 hr) Lewis and
(Daphnia 115-246 mglL LC50 (48 hr) LCSO (48 hr) Valentine 1981;
magna) Gersich 1984
13-53 mglL Hard water LC50 (21 d); reduced mean
brood size and body length
13.6 mglL 21 d LOAEL, reproductive effects
6.4 mglL 21 d NOAEL
Fish
Bluegill Boron 15,000 mg BIL LCSO (24 hr) Birge and Black
(Lepomis trifluoride 1977
macrochirus)
Chinook Boric acid >1,000 mglL Eyed eggs, alevins LCSO (24 hr) Hamilton and
salmon and fry; soft water Buhl 1990
566-725 mglL Fry; very hard and soft LCSO (96 hr)
fresh water
Chinook and Boric acid >1,000 mglL Fry; very hard fresh LCSO (24 hr)
Coho salmon and brackish water
Coho salmon Boric acid 447 mg/L Very hard fresh water LCSO (96 hr)

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