2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

5/21/2018 | 12:15 PM - 12:30 PM | ANALYZING NEOTROPICAL DIATOM METACOMMUNITIES ACROSS SPACE AND TIME | 310 B

ANALYZING NEOTROPICAL DIATOM METACOMMUNITIES ACROSS SPACE AND TIME

Determining mechanisms of community assembly in high-elevation lakes is key to anticipating global change impacts in these sentinel ecosystems. However, such mechanisms are difficult to study using environmental and/or spatial variables from only snapshot sampling, given the complex spatial-temporal mechanisms of community assembly, as well as differential functional traits of target species. This study focuses on tropical lakes of South America, which are key systems in fulfilling important ecological and economic functions for Andean societies over the millennia. Our overarching question is: what insights do historical changes in the paleolimnological record provide on present diatom metacommunities? This question is being addressed using complementary approaches that span a range of spatial and temporal scales. First, a diatom-guild metacommunity model is used to examine niche- and dispersal-based assembly processes that structure diatom communities across the tropical Andes. Second, single-species distributions are modelled incorporating historical legacies of diatom communities in lakes of Ecuador to aid interpretations of mechanisms driving recent limnological change. This novel framework should advance the applicability of metacommunity theory to evaluate the resilience of complex natural systems and also provide tools for well-informed management and conservation strategies for tropical lakes.

Amazon Andes
Dispersal
Functional Ecology

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Presenters/Authors

Xavier Benito (), University of Nebraska-Lincoln, xbenitogranell2@unl.edu;