Registration Dossier

Administrative data

Endpoint:
biological effects monitoring
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study well documented, meets generally accepted scientific principles (also assessed by OECD)

Data source

Reference
Reference Type:
publication
Title:
Effects of sediment and contaminated sediment on structural and functional components of experimental stream ecosystems
Author:
Fairchild JF, Boyle T, English WR, Rabeni C
Year:
1987
Bibliographic source:
Water Air Soil Pollut 36(3), 271-293

Materials and methods

Test guideline
Qualifier:
no guideline available
Principles of method if other than guideline:
Experimental stream ecosystems were used to determine the effects of sediment and contaminated sediment
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Any other information on results incl. tables

Outdoor experimental stream including two pools and 50 m total length at  
National Fisheries Contaminant Research Center.
Monitoring of nutrient dynamics: no effect
Leaf decomposition: no effect
Benthic algal dynamics:        no effect
Benthic invertebrates:
number, diversity no effect
Insect emergence: no effect
Benthic organisms, drift: effect, immediatly starting when soil with TPP conc. >= 400 mg/kg was added, thereafter sedation
Fish: no mortality in caged bluegills exposed for 96 h each week. After the treatments at 400, 800, and 1600 mg/kg, bluegills were visually examined and x-rayed for vertebral abnormalities known to occur after laboratory exposure to some arylphosphates. The findings of Mayer et al. 1981 were confirmed (see chapt. 4.5.1), no such sublethal effects were detected with TPP.

Applicant's summary and conclusion

Conclusions:
There was no effect of TPP on nutrient dynamics, leaf decomposition, Benthic algal dynamics, Benthic invertebrates (number, diversity), insect emergence. However there was an effect on Benthic organisms (drift), immediatly starting when soil with TPP conc. >= 400 mg/kg was added, thereafter sedation. There was no mortality in caged bluegills exposed for 96 h each week.
Executive summary:

There was no effect of TPP on nutrient dynamics, leaf decomposition, Benthic algal dynamics, Benthic invertebrates (number, diversity), insect emergence. However there was an effect on Benthic organisms (drift), immediatly starting when soil with TPP conc. >= 400  mg/kg was added, thereafter sedation. There was no mortality in caged bluegills exposed for 96 h each week.