Talks and presentations

Acceleration and demographic rates of bird decline in North America

January 07, 2024

Conference, International Biogeography Society, Prague

Decomposing abundance change to recruitment and loss: analysis of the North-American avifauna

August 10, 2023

Conference, Ecological Society of America, Portland, Oregon

Species richness is the most commonly used metric to assess biodiversity crisis, but fluctuations in species number start with fluctuations in the number of individuals (i.e. abundance). Population abundances are known to be globally plummeting with, e.g., three billion fewer birds in the US compared to the 70’s. However, assessing population decline doesn’t give insight on the dynamic of the ecological processes driving abundance change, namely losses and recruitments of individuals.

Untangling biodiversity changes across a continuum of spatial scales

June 05, 2022

Conference, International Biogeography Society conference, Vancouver, BC

Magnitude assessment of biodiversity changes is challenging, even in well surveyed groups such as birds. Especially, trends of biodiversity can be driven by the spatial and temporal scales considered, specifically by spatial grains (i.e. area of a sampling unit), geographic extent (i.e. size of the area of interest), temporal grain (i.e. duration of a sampling event) and temporal extent (i.e. length of the time series). However, the influence of spatio-temporal scales on biodiversity trends is seldom documented. Here, we empirically address this issue by using high-quality spatially and temporally heterogenous time-series on bird biodiversity of Czech Republic.