Landscape complexity has limited effects on the genetic structure of two arable plant species, Adonis aestivalis and Consolida regalis

The agricultural landscape of central Europe has changed dramatically in recent decades due to intensified cultivation, bringing many of its characteristic species to the brink of extinction. We investigated whether landscape structure affects the genetic structure and diversity of remnant populations of the two arable plant species Adonis aestivalis and Consolida regalis. We used dominant amplified fragment length polymorphism markers (AFLPs) and compared populations from six regions of 5 km² in central Germany. These regions represent two different classes of landscape structural complexity: intensively used, homogeneous landscapes (>95% of area covered by arable land with low extent of field margins) or heterogeneous regions (