The effects of 3-trifluoromethyl-4-nitrophenol (TFM) lampricide on aquatic macroinvertebrates and periphyton were examined after treatment of a portion of the Boquet River, Essex County, New York, in the fall of 2003.\u00a0\u00a0 The null-hypothesis was that there would be no significant impacts of TFM exposure on benthic or drifting macroinvertebrate total abundance, individual taxa abundance or on periphyton biomass following lampricide treatment of the Boquet River.<\/p>\n
Upon completion of a before-and-after sampling regime of macroinvertebrates, the null-hypothesis was rejected after results indicated that there were significant (P<0.05) decreases in density in 16 of 83 benthic taxa:\u00a0\u00a0Acentrella, Baetis, Epeorus,Heptagenia,\u00a0Taeniopteryx,\u00a0Ochrotrichia,\u00a0Leucotrichia,\u00a0Psychomyia,\u00a0Rhyacophila,\u00a0Neophylax, Orthocladiinae, Chironomidae pupae, and\u00a0Antocha.\u00a0 Significant increases were shown by\u00a0Prostoma, Capniidae, and\u00a0Taenionema.\u00a0 Reductions in\u00a0Ceratopsyche\u00a0and\u00a0Chimarra\u00a0were also witnessed, however, these results were not found to be significant.\u00a0 The results of drift samples indicated that Oligochaeta and Trichoptera showed significant (P<0.05) increases in drifting behavior on the dates following TFM treatment, while Chironomidae pupae and Simuliidae showed significant decreases in drift.\u00a0 Trichoptera showed the highest decline in density of all benthic taxa, as well as the highest increase in drift.\u00a0 The majority of changes shown by the effected organisms occurred on October 24, the first sampling date following TFM application.\u00a0 Post-treatment changes in taxa density were considerable enough to affect the community composition of both benthic and drifting populations.\u00a0 A full recovery of affected organisms was not evident by the final sampling date, 33 days after TFM application.\u00a0 Periphyton biomass was not found to be significantly affected by TFM treatment.<\/p>\n","protected":false},"featured_media":0,"template":"","class_list":["post-2387","project","type-project","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/project\/2387","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/project"}],"about":[{"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/types\/project"}],"wp:attachment":[{"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/media?parent=2387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}