RT info:eu-repo/semantics/article T1 Can the life-history strategy explain the success of the exotic trees Ailanthus altissima and Robinia pseudoacacia in Iberian floodplain forests? A1 Castro Díez, María del Pilar A1 Valle Torres, Guillermo A1 González Muñoz, Noelia A1 Alonso Fernández, Álvaro K1 Invasiones biológicas K1 Estrategias funcionales K1 Fenología K1 Nicho K1 Crecimiento K1 Ciencia K1 Medio Ambiente K1 Science K1 Environmental science AB Ailanthus altissima and Robina pseudoacacia are two successful invasive species of floodplains in central Spain. We aim to explain their success as invaders in this habitat by exploring their phenological pattern, vegetative and sexual reproductive growth, and allometric relations, comparing them with those of the dominant native tree Populus alba. During a full annual cycle we follow the timing of vegetative growth, flowering, fruit set, leaf abscission and fruit dispersal. Growth was assessed by harvesting two-year old branches at the peaks of vegetative, flower and fruit production and expressing the mass ofcurrent-year leaves, stems, inflorescences and infrutescences per unit of previous-year stem mass. Secondary growth wasassessed as the increment of trunk basal area per previous-year basal area. A. altissima and R. pseudoacacia showedreproductive traits (late flowering phenology, insect pollination, late and long fruit set period, larger seeds) different from P. alba and other native trees, which may help them to occupy an empty reproductive niche and benefit from a reduced competition for the resources required by reproductive growth. The larger seeds of the invaders may make them less dependent on gaps for seedling establishment. If so, these invaders may benefit from the reduced gap formation rate of flood-regulated rivers of the study region. The two invasive species showed higher gross production than the native, due to the higher size of pre-existing stems rather than to a faster relative growth rate. The latter was only higher in A. altissima for stems, and in R. pseudoacacia for reproductive organs. A. altissima and R. pseudoacacia showed the lowest and highest reproductive/vegetative mass ratio, respectively. Therefore, A. altissima may outcompete native P. alba trees thanks to a high potential to overtop coexisting plants whereas R. pseudoacacia may do so by means of a higher investment in sexual reproduction. PB PLOS SN 1932-6203 YR 2014 FD 2014 LK http://hdl.handle.net/10017/20531 UL http://hdl.handle.net/10017/20531 LA eng DS MINDS@UW RD 28-mar-2024