Ecophysiology of Berberis darwinii Hook. in its native range

• Main Author: Svriz, Maya
• Other Authors: Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD France-Sud ), Universidad Nacional del Comahue, María Angélica Damascos, Daniel Barthélémy (Inrae)
• Format: Doctoral or Postdoctoral Thesis
• Language: English
• Published: HAL CCSD 2015
• Subjects: Phenology; Argentina; Ecophysiology; Phénologie; Berberis darwinii; Argentine; Caractères morpho-architecturaux; Architecture végétale; Ecophysiologie; [SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics; Phylogenetics and taxonomy; [SDV.EE.ECO]Life Sciences [q-bio]/Ecology; environment/Ecosystems; [SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics; [SDE.BE]Environmental Sciences/Biodiversity and Ecology; New Zealand; Victoria Island
• Online Access: https://hal.inrae.fr/tel-03144007; https://hal.inrae.fr/tel-03144007/document; https://hal.inrae.fr/tel-03144007/file/TESIS%20FINAL_SVRIZ%20M_25-11-2015.pdf

Invasive exotic species' success may depend on ecophysiological attributes present in their native area (NA) or those derived from changes that took place in the invaded area (IA). Berberis darwinii is a shrub native to Argentina and Chile, and invasive in New Zealand. The ecological, ecophysiological and growth patterns of plants of this specie that present under different light conditions in temperate forests of southern Argentina were studied.The ecophysiological attributes of populations of B. darwinii of NA were compared with published data on populations of IA. In NA abundance of B. darwinii was studied in 39 plots (100x100m) in forests of the Nahuel Huapi National Park and compared to a set of environmental variables. Local abundance of the specie was compared in relation to conditions of gap, edge, and under the canopy of Nothofagus dombeyi at two sites at Victoria Island, one at Llao-Llao and Traful. On two of this sites, flowering and fruiting phenology, and reproductive success of B. darwinii was studied. Production of flowers and ripe fruits was analyzed periodically in five branches of ten plants per light environment. In these environments the viability of seeds, seed bank, germination, seedling survival, growth and biomass allocation were studied, determining the LAR (total fresh leaf area/total massseedling), LMR (total leaf mass/total seedling mass), RMR (root mass/mass of stem + leaf), and SLA (total leaf fresh area/total leaf mass). In two sites were studied light effect on branches growth level in five plants per adult in each light environment, and in one site the photosynthesis. Also, was determinate the net photosynthesis as a function of photosynthetically active radiation, stomatal conductance (gs), the maximum rate of photosynthesis under saturating light (Pmax), photosynthesis based on leaf mass (Pmass), and water use efficiency (WUE). Finally, branching patterns were studied according to light in two sites. Locally, B. darwinii is a sunny specie adapted to intermediate light ...