Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


Luken_MSThesis_Final.pdf (14.8 MB)

ETD Abstract Container

Abstract Header

Long-term response of zooplankton biomass and phenology to environmental variability in a eutrophic reservoir

Luken, Heather Grace
http://orcid.org/0000-0003-3482-7914
http://rave.ohiolink.edu/etdc/view?acc_num=miami1605897812690996

Abstract Details

2020, Master of Science, Miami University, Biology.
Zooplankton in reservoirs within agricultural landscapes exhibit unique dynamics due to highly variable discharge as well as elevated nutrient inputs and productivity. Here we explore the long-term response of crustacean zooplankton biomass and phenology and relate these to long-term trends and interannual variability (IAV) in environmental factors in a eutrophic reservoir over a 24-year period. We also investigated bidirectional effects among zooplankton taxa, chlorophyll, and larval fish using convergent cross mapping (CCM). Cyclopoids increased and rotifers decreased over time, while the center of gravity (COG, week of peak biomass) of calanoids advanced over time. We detected the largest number of significant correlations between the IAVs of crustacean taxa and temperature, and between the IAVs of crustacean taxa COG and chlorophyll COG. CCM identified numerous interspecific relationships among zooplankton taxa and effects of inorganic turbidity, temperature, and food quality. Bottom-up effects of chlorophyll on cyclopoids and rotifers as well as rotifers on copepods were significant, while top-down effects were marginally significant. Our findings suggest phytoplankton and temperature likely drove long-term changes in the zooplankton community. Management of eutrophic reservoirs should consider the temporal scale and complexity of food web dynamics to understand effects from climatic factors and watershed inputs.
María González, Dr. (Advisor)
Michael Vanni, Dr. (Committee Member)
Craig Williamson, Dr. (Committee Member)
Thomas Fisher, Dr. (Committee Member)
Aquatic Sciences; Biology; Ecology; Environmental Science; Limnology
temperature; stream discharge; reservoir; larval fish; phytoplankton; food web; cladoceran; copepod; rotifer; seasonal dynamics; phenology; interannual variability; convergent cross mapping

Recommended Citations

Citations

  • Luken, H. G. (2020). Long-term response of zooplankton biomass and phenology to environmental variability in a eutrophic reservoir [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1605897812690996

    APA Style (7th edition)

  • Luken, Heather. Long-term response of zooplankton biomass and phenology to environmental variability in a eutrophic reservoir. 2020. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1605897812690996.

    MLA Style (8th edition)

  • Luken, Heather. "Long-term response of zooplankton biomass and phenology to environmental variability in a eutrophic reservoir." Master's thesis, Miami University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1605897812690996

    Chicago Manual of Style (17th edition)

miami1605897812690996
366
© 2020, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.