Data from: Reintroduced native Populus nigra in restored floodplain reduces spread of exotic poplar species.



Exotic Populus taxa pose a threat to the success of riparian forest restoration in floodplain areas. We evaluated the impact of exotic Populus taxa on softwood riparian forest development along the river Common Meuse after introducing native Populus nigra and after the re-establishment of the natural river dynamics. We sampled 154 poplar seedlings that spontaneously colonised restored habitat and assessed their taxonomy based on diagnostic chloroplast and nuclear microsatellite markers. Furthermore, by using a paternity analysis on 72 seedlings resulting from six open pollinated P. nigra females, we investigated natural hybridization between frequently planted cultivated poplars and native P. nigra.

The majority of the poplar seedlings from the gravel banks analyzed where identified as P. nigra; only 2% of the sampled seedlings exhibited genes of exotic poplar species. Similarly, the majority of the seedlings from the open pollinated progenies were identified as P. nigra. For three seedlings (4%), paternity was assigned to a cultivar of P. x canadensis.

Almost two decades after reintroducing P. nigra, the constitution of the seed and pollen pools changed in the study area in favour of reproduction of the native species and at the expense of the exotic poplar species. This study indicates that, although significant gene flow form exotic poplars is observed in European floodplains, restoration programmes of the native P. nigra can vigorously outcompete the exotic gene flows and strongly reduce the impact of exotic Populus taxa on the softwood riparian forest development.
Date made available2020
Date of data production26-Dec-2020

Geographic list

  • Benelux


  • biodiversity policy
  • conservation goals
  • ecosystem services

Taxonomic list

  • poplar (Populus spp.)

EWI Biomedical sciences

  • B003-ecology
  • B004-botany

Thematic list

  • Species and biotopes

Free keywords

  • riparian forests
  • introgression

Thematic List 2020

  • Forest
  • Data & infrastructure


  • genetic technologies

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