@phdthesis{Isasa2024,
  author    = {Isasa, Emilie},
  title     = {Relationship between wood properties, drought-induced embolism and environmental preferences across temperate diffuse-porous broadleaved trees},
  doi       = {10.25972/OPUS-30356},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-303562},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2024},
  abstract  = {In the scope of climate warming and the increase in frequency and intensity of severe heat waves in Central Europe, identification of temperate tree species that are suited to cope with these environmental changes is gaining increasing importance. A number of tree physiological characteristics are associated with drought-stress resistance and survival following severe heat, but recent studies have shown the importance of plant hydraulic and anatomical traits for predicting drought-induced tree mortality, such as vessel diameter, and their potential to predict species distribution in a changing climate. A compilation of large global datasets is required to determine traits related to drought-induced embolism and test whether embolism resistance can be determined solely by anatomical traits. However, most measurements of plant hydraulic traits are labour-intense and prone to measurement artefacts. A fast, accurate and widely applicable technique is necessary for estimating xylem embolism resistance (e.g., water potential at 50\% loss of conductivity, P50), in order to improve forecasts of future forest changes. These traits and their combination must have evolved following the selective pressure of the environmental conditions in which each species occurs. Describing these environmental-trait relationships can be useful to assess potential responses to environmental change and mitigation strategies for tree species, as future warmer temperatures may be compounded by drier conditions.},
  subject      = {Pflanzen{\"o}kologie},
  language  = {en}
}
@article{DorjiSchuldtNeudametal.2021,
  author    = {Dorji, Yonten and Schuldt, Bernhard and Neudam, Liane and Dorji, Rinzin and Middleby, Kali and Isasa, Emilie and K{\"o}rber, Klaus and Ammer, Christian and Annigh{\"o}fer, Peter and Seidel, Dominik},
  title     = {Three-dimensional quantification of tree architecture from mobile laser scanning and geometry analysis},
  series = {Trees},
  volume    = {35},
  journal   = {Trees},
  number    = {4},
  issn      = {0931-1890},
  doi       = {10.1007/s00468-021-02124-9},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-307501},
  pages     = {1385-1398},
  year      = {2021},
  abstract  = {Key message Mobile laser scanning and geometrical analysis revealed relationships between tree geometry and seed dispersal mechanism, latitude of origin, as well as growth. Abstract The structure and dynamics of a forest are defined by the architecture and growth patterns of its individual trees. In turn, tree architecture and growth result from the interplay between the genetic building plans and environmental factors. We set out to investigate whether (1) latitudinal adaptations of the crown shape occur due to characteristic solar elevation angles at a species' origin, (2) architectural differences in trees are related to seed dispersal strategies, and (3) tree architecture relates to tree growth performance. We used mobile laser scanning (MLS) to scan 473 trees and generated three-dimensional data of each tree. Tree architectural complexity was then characterized by fractal analysis using the box-dimension approach along with a topological measure of the top heaviness of a tree. The tree species studied originated from various latitudinal ranges, but were grown in the same environmental settings in the arboretum. We found that trees originating from higher latitudes had significantly less top-heavy geometries than those from lower latitudes. Therefore, to a certain degree, the crown shape of tree species seems to be determined by their original habitat. We also found that tree species with wind-dispersed seeds had a higher structural complexity than those with animal-dispersed seeds (p < 0.001). Furthermore, tree architectural complexity was positively related to the growth performance of the trees (p < 0.001). We conclude that the use of 3D data from MLS in combination with geometrical analysis, including fractal analysis, is a promising tool to investigate tree architecture.},
  language  = {en}
}