자료유형  

 학위논문

Control Number  

0016932601

International Standard Book Number  

9798379831905

Dewey Decimal Classification Number  

574.19

Main Entry-Personal Name  

Rackliffe, Daniel Riley.

Publication, Distribution, etc. (Imprint  

[S.l.] : Purdue University., 2021

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2021

Physical Description  

1 online resource(113 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

General Note  

Advisor: Hoverman, Jason T.

Dissertation Note  

Thesis (Ph.D.)--Purdue University, 2021.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약Mayflies are important macroinvertebrate members of steam communities and are highly sensitive to agricultural insecticides. In this dissertation I sought to explore whether Heptageniidae mayflies in Indiana have evolved greater tolerance to clothianidin, a neonicotinoid insecticide that has been widely applied over the predominant corn and soybean crops of the state for the last 20 years. Over the five chapters of this dissertation, I investigate different aspects of the effects of clothianidin on mayfly populations. First, I collected mayfly populations from streams around the state across a gradient of agricultural landscape to see if proximity to corn and soybean crops was associated with tolerance to the insecticide. I found significant variation in tolerance between the populations but only connected it to land use for one species and one insecticide. Second, I investigated the potential for increases in predation rates due to exposure to low concentrations of clothianidin by both a vertebrate and invertebrate predator. Sublethal exposure did increase the risk of predation by the invertebrate predator but not the vertebrate. Third, I collected four populations of mayflies and placed them in a common stream which is heavily impacted by agricultural runoff. The most tolerant of the four populations had the highest survival rates and was native to the polluted stream, suggesting that it was best adapted to the local conditions. Finally, the last chapter is a discussion of the factors influencing the evolution of contaminant tolerance, the implications for biomonitoring, and a series of recommendations for incorporating evolved tolerance into biomonitoring practices. Collectively, this work suggests that the lethal and sublethal effects of clothianidin exposure create conditions suitable for the evolution of tolerance in Heptageniid mayflies. While there are already differences in tolerance between populations, it seems likely that mayfly pesticide tolerance will continue to increase as pesticides continue to impact aquatic ecosystems.

Subject Added Entry-Topical Term  

Biological assays.

Subject Added Entry-Topical Term  

Agriculture.

Subject Added Entry-Topical Term  

Creeks & streams.

Subject Added Entry-Topical Term  

Soybeans.

Subject Added Entry-Topical Term  

Rivers.

Subject Added Entry-Topical Term  

Pesticides.

Subject Added Entry-Topical Term  

Watersheds.

Subject Added Entry-Topical Term  

Predation.

Subject Added Entry-Topical Term  

Agricultural chemistry.

Subject Added Entry-Topical Term  

Aquatic sciences.

Subject Added Entry-Topical Term  

Chemistry.

Subject Added Entry-Topical Term  

Organic chemistry.

Subject Added Entry-Topical Term  

Water resources management.

Added Entry-Corporate Name  

Purdue University.

Host Item Entry  

Dissertations Abstracts International. 85-01B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:642922