2014-05 Task Force Population Dynamics kicks off with workshop ragweed demography

Twenty participants, from France to Armenia, gathered Friday 23 May 2014 in Montpellier for the first meeting of the Task Force Population Dynamics. In a half-day workshop, organised by the coordinator Suzanne Lommen (CH), and the local organiser Bruno Chauvel (FR), everyone was trained to conduct the protocol, especially developed to study the demography of common ragweed.

Finding the Ambrosia plants

Finding the Ambrosia plants

The participants received the protocol, standardized record forms and help tools. After a presentation, they went outside to practice all aspects of the protocol on an artificially created population in the garden – from setting up the study plots, tagging individual plants, to measuring the viability of seeds extracted from soil samples. In the final discussion, the methods to take measures were optimized and fine-tuned. Now everyone is prepared to monitor their local ragweed populations. An online forum was initiated to share experiences during the field season.

Delimiting plots and measuring plants

Delimiting plots and measuring plants

Sampling soil, extracting and identifying Ambrosia seeds, and analysing their viability

Sampling soil, extracting and identifying Ambrosia seeds, and analysing their viability