Xylosandrus crassiusculus , a fungus‐farming wood borer native to Southeastern Asia, is the most rapidly spreading invasive ambrosia species worldwide. Previous studies focusing on its genetic structure suggested the existence of cryptic genetic variation in this species. Yet, these studies used different genetic markers, focused on different geographical areas and did not include Europe. Our first goal was to determine the wo...

Stable isotope analysis of organic matter in sediment records has long been used to track historical changes in productivity and carbon cycling in marine and lacustrine ecosystems. While flow dynamics preclude stratigraphic measurements of riverine sediments, such retrospective analysis is important for understanding biogeochemical cycling in running waters. Unique collections of riverine fish scales were used to analyse δ 15...

Saharan oases are frequently subjected to waterlogging due to the presence of shallow and salty groundwater and poor irrigation and drainage conditions. To overcome this problem in Tunisia, in 2002 an official modernization programme was implemented based on two operations: (i) increasing irrigation efficiency by building concrete irrigation canals to limit losses due to water percolation and (ii) controlling waterlogging and...