Gregory-Eaves Lab

Synthesizing large paleolimnological datasets to draw general inferences of regional to global-scale dynamics and driver


Photos: Amanda Winegardner, Jesse Vermaire and Rene Gregory-Eaves

My lab has taken advantage of the growing pool of published lake sediment records to quantify the rate and drivers of ecosystem change. For example, we conducted a synthesis of long-term nutrient dynamics (inferred from diatom assemblages) based on 67 lake sediment records, which provided some of the first empirical evidence that land-use legacies are important determinants of water-quality trends over the 20th century (Keatley et al. 2011). My lab has also led a synthesis of a ~100-lake dataset that has shown a disproportionate increase in potentially toxic cyanobacteria (as inferred from pigment sediment records) relative to diatoms over the Anthropocene. Cyanobacterial trends were best explained by nutrient concentration, lake depth and temperature (Taranu et al. 2015). Most recently, my group has participated in a larger European study that identified urbanization as the primary driver of lake-water hypoxia (Jenny et al. 2016). Our lab is now really excited about conducting syntheses of large-scale and long-term patterns in water quality and planktonic communities by developing a dataset from ~600 Canadian lakes via the recently-funded NSERC Network project, Lake Pulse.

Last update: Oct. 24, 2016