<i>Lindernia dubia</i> (L.) Pennel as an Alien Weed in Central Spain: A Case Study
2024
María Dolores Curt | Gema Sánchez | Pedro Luis Aguado | Inés Santín-Montanyá
<i>Lindernia dubia</i> (L.) Pennell is a species with invasive behavior outside of its native range of distribution (America), linked mainly to aquatic habitats. This annual species has been acknowledged as a weed in rice paddies in Europe and Asia. Due to the impacts of this invasive plant, some authors have even listed this species as a global invader. The present work focused on spontaneous plant species occurring in seedlings of <i>Typha domingensis</i> Pers. grown in central Spain for the establishment of constructed wetlands. Weed inventory revealed the presence of <i>L. dubia</i> as a dominant spontaneous species in this crop environment. A suite of mesocosm experiments were designed to study the population density of <i>L. dubia</i> versus that of the other dominant plant species, and to determine traits associated with its weedy potential. The results showed that <i>L. dubia</i> presents competitive attributes such as morphological variability, early flowering, long seeding time, short growth cycle, small and light seeds and a high seed production and germination rate (25 °C), meaning a high reproductive capacity in a cycle of about three months for plant growth in non-limiting conditions. The data obtained from this work provide a basis for understanding the weedy potential of <i>L. dubia</i>, and for management decisions of a potentially invasive species, which has been little investigated in Europe
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