title: Pesticide (hexachlorocyclohexane) inhibition of growth and nitrogen fixation in blue-green algae Anabaenopsis raciborskii and Anabaena aphanizomenoides.
abstract: The effects of the pesticide hexachlorocyclohexane (HCH) on the nitrogen fixing blue-green algae Anabaenopsis raciborskii and Anabaena aphanizomenoides commonly found as blooms in fish ponds were studied. These algae were very sensitive to HCH, and a distinct decrease in growth rate was observed on prolonged incubation. Lower concentrations (10 microgram/ml) were algistatic and higher concentrations (60 microgram/ml) were algicidal. The inhibition of nitrogen fixation indicated that the presence of HCH might affect overall nitrogen economy of inland waters.
mesh_terms: D000458:Cyanobacteria / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D005618:Fresh Water; D001556:Hexachlorocyclohexane / Q000494:pharmacology*; D009586:Nitrogen Fixation / Q000187:drug effects; D014871:Water Microbiology
chemical_list: D001556:Hexachlorocyclohexane