BES2021: Planktonic functional diversity changes in synchrony with lake ecosystem state

A talk given at the British Ecological Society's annual meeting.

Transcript

1. Planktonic functional diversity as a predictor of lake state change @duncanobrienn duncan.obrien@bristol.ac.uk
2. Background š Modern society is constructed upon our exploitation of certain ecosystems (Rockström et al. 2009) š Loss of functioning therefore a concern š Quantifying ecosystem change first step to management (Pace et al. 2015) @duncanobrienn
3. Background Biodiversity underpins ecosystem function BEF relationship Cardinale et al. 2006; Tilman et al. 2014; Duffy et al. 2017 @duncanobrienn © Shane Gross
4. Background š Monitoring š Multidimensional š Traits → determine spatial and temporal impact of an individual š A more robust predictor of functioning in the BEF? (Gagic et al. 2015; Abonyi et al. 2018) Phylogenetic Functional Genetic Phylogenetic Functional Genetic @duncanobrienn
5. Scope š Are changes in FD observable prior to changes in species diversity? š Can FD be estimated from literature averages? @duncanobrienn
6. Methods: Lakes Perinidium Staurastrum Keratella Daphnia Diaptomus Cyclops
7. Methods 1. Identify appropriate data sources 2. Construct morphospace 3. Estimate functional diversity 4. Make stationary 5. Cross correlate: system state ~ diversity 6. Permute @duncanobrienn
8. Results System State Trophic ratio MVI Fisher info Density PCA Functional Diversity Disp Disp Even Even Rich Rich Phytoplankton Zooplankton š Both state and diversity change Time → Value → @duncanobrienn
9. Results š Weak correlations at lag0 between certain metrics š Inconsistent across lakes Instantaneous correlation Lake Kinneret Lake Mendota @duncanobrienn
10. Results š Including lags does not improve the strength of relationship Cross correlation Lake Kinneret Lake Mendota @duncanobrienn
11. @duncanobrienn
12. Take home messages Functional diversity is calculable Non-linear relationship? (Sugihara et al. 2012) Trait data missing Alternative measure of lake state @duncanobrienn
13. Acknowledgments Dr Chris Clements Dr Gideon Gal Prof. Julia Blanchard Dr Stephen Thackeray Funding @duncanobrienn duncan.obrien@bristol.ac.uk