Taking Apart the Time Machine: Investigating Space-for-Time Substitution Modeling in the Florida Everglades
First Advisor's Name
Joel C. Trexler
First Advisor's Committee Title
Second Advisor's Name
Second Advisor's Committee Title
Third Advisor's Name
Third Advisor's Committee Title
Fourth Advisor's Name
Fourth Advisor's Committee Title
Space-for-Time Substitution, Chronosequence, Everglades, Beta Diversity
Date of Defense
Space-for-Time substitution modeling has been used with increasing frequency to identify functional relationships between environmental drivers and ecological responses. I investigated the use of space-for-time substitution as a null model and beta diversity as a validity test for this null model in the Greater Everglades aquatic metacommunity. I began by conducting a literature review and analysis to investigate the suitability of the space-for-time substitution method as a null model. I then analyzed beta diversity of the Greater Everglades aquatic metacommunity through a sums-of-squares approach. Finally, I tested for correlation between the beta diversity analysis and the space-for-time models. Results indicate that while beta diversity is correlated with space-for-time model success for some species, the relationship is not consistently significant and therefore not suited for validity testing. Space-for-Time substitution is suitable for use as a null model but cannot be used reliably in predictive models for management purposes.
Brown, Theresa Kelly, "Taking Apart the Time Machine: Investigating Space-for-Time Substitution Modeling in the Florida Everglades" (2019). FIU Electronic Theses and Dissertations. 4380.
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