Explaining variability in the production of seed and allergenic pollen by invasive Ambrosia artemisiifolia across Europe

Suzanne T. E. Lommen; Caspar A. Hallmann; Eelke Jongejans; Bruno Chauvel; Melinda Leitsch-Vitalos; Alla Aleksanyan; Peter Tóth; Cristina Preda; Maja Šćepanović; Huseyin Onen; Barbara Tokarska-Guzik; Paulina Anastasiu; Zita Dorner; Annamária Fenesi; Gerhard Karrer; Katalin Nagy; Gyula Pinke; Viktor Tiborcz; Gergely Zagyvai; Mihály Zalai; Gabriella Kazinczi; Robert Leskovšek; Danijela Stešević; Guillaume Fried; Levani Kalatozishvili; Andreas Lemke; Heinz Müller-Schärer