Evaluating structural and compositional canopy characteristics to predict the light-demand signature of the forest understorey in mixed, semi-natural temperate forests

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

  • Leen Depauw
  • Michael P. Perring
  • Dries Landuyt
  • Sybryn L. Maes
  • Haben Blondeel
  • Emiel De Lombaerde
  • Guntis Brūmelis
  • Jörg Brunet
  • Déborah Closset-Kopp
  • Guillaume Decocq
  • Jan Den Ouden
  • Radim Hédl
  • Thilo Heinken
  • Steffi Heinrichs
  • Bogdan Jaroszewicz
  • Martin Kopecký
  • Ilze Liepiņa
  • Martin Macek
  • František Máliš
  • Wolfgang Schmidt
  • Simon M. Smart
  • Karol Ujházy
  • Monika Wulf
  • Kris Verheyen

Questions: Light availability at the forest floor affects many forest ecosystem processes, and is often quantified indirectly through easy-to-measure stand characteristics. We investigated how three such characteristics, basal area, canopy cover and canopy closure, were related to each other in structurally complex mixed forests. We also asked how well they can predict the light-demand signature of the forest understorey (estimated as the mean Ellenberg indicator value for light [“EIVLIGHT”] and the proportion of “forest specialists” [“%FS”] within the plots). Furthermore, we asked whether accounting for the shade-casting ability of individual canopy species could improve predictions of EIVLIGHT and %FS. Location: A total of 192 study plots from nineteen temperate forest regions across Europe. Methods: In each plot, we measured stand basal area (all stems >7.5 cm diameter), canopy closure (with a densiometer) and visually estimated the percentage cover of all plant species in the herb (<1 m), shrub (1–7 m) and tree layer (>7 m). We used linear mixed-effect models to assess the relationships between basal area, canopy cover and canopy closure. We performed model comparisons, based on R2 and the Akaike Information Criterion (AIC), to assess which stand characteristics can predict EIVLIGHT and %FS best, and to assess whether canopy shade-casting ability can significantly improve model fit. Results: Canopy closure and cover were weakly related to each other, but showed no relation with basal area. For both EIVLIGHT and %FS, canopy cover was the best predictor. Including the share of high-shade-casting species in both the basal-area and cover models improved the model fit for EIVLIGHT, but not for %FS. Conclusions: The typically expected relationships between basal area, canopy cover and canopy closure were weak or even absent in structurally complex mixed forests. In these forests, easy-to-measure structural canopy characteristics were poor predictors of the understorey light-demand signature, but accounting for compositional characteristics could improve predictions.

Original languageEnglish
Article numbere12532
JournalApplied Vegetation Science
Volume24
Issue number1
Number of pages13
ISSN1402-2001
DOIs
Publication statusPublished - 01.01.2021

    Research areas

  • basal area, canopy closure, canopy cover, Ellenberg indicator values, herb layer, light availability, light transmittance, shade-casting ability, temperate forest, understorey
  • Ecosystems Research
  • Environmental planning

DOI

Recently viewed

Activities

  1. Workshop on "The State and beyond: Actor constellations in resource conflicts" - 2015
  2. 4th Global TraPs Workshop "Defining Case Studies – Setting Priorities”
  3. Workshop of the Nordic Research Network in Memory Studies - 2013
  4. The golden age of software architecture better named the middle age of software architecture - Some provocative thoughts
  5. Enhancing EFL classroom instruction via an ICALL platform: effects on language development and transfer to tasks (EUROCALL)
  6. Corrosion, scaling and biofouling processes in thermal systems and monitoring using redox potential measurements
  7. Learning Processes in a Video-based Learning Environment: What do teachers think and feel when they observe their own teaching or that of others?
  8. Towards an Emotional Geography of Urban Policing: Exploring the Materialization of Police Territoriality with Emotional Mapping Interviews
  9. Micro and macro scale behavior of thermochemical materials in pure and composite forms for thermal storage applications
  10. Linking Teaching and Learning Formats with Student Development of Key Sustainability Competencies
  11. Working in Research-Practice-Partnerships: Empirical Findings on Motivation, Co-Construction and Learning Effects
  12. Keeping drivers engaged in automated driving through maneuver control- effects on perceived control and responsibility
  13. Trajectory-based Lagrangian approaches for the extraction and characterization of coherent structures in turbulent convection
  14. Disaggregating Democracy and the Legitimization of Functionally Fragmented Governance beyond the State
  15. LC-MS identification of the photo-transformation products of desipramine with studying the effect of different environmental variables on the kinetics of their formation
  16. DSP-Kolloquium 2017
  17. From Quantity to Quality: Structuring Provenance Data.

Publications

  1. lp-Norm Multiple Kernel Learning
  2. Design optimization of spiral coils for textile applications by genetic algorithm
  3. Exact and approximate inference for annotating graphs with structural SVMs
  4. Recurrence Quantification Analysis of Processes and Products of Discourse
  5. Lessons learned for spatial modelling of ecosystem services in support of ecosystem accounting
  6. Clause identification using entropy guided transformation learning
  7. Mathematical Modeling for Robot 3D Laser Scanning in Complete Darkness Environments to Advance Pipeline Inspection
  8. An analytical approach to evaluating nonmonotonic functions of fuzzy numbers
  9. An analytical predictor machine learning corrector scheme for modeling lateral flow in hot strip rolling
  10. Improving students’ science text comprehension through metacognitive self-regulation when applying learning strategies
  11. “Ideation is Fine, but Execution is Key”
  12. Comments on "Tracking Control of Robotic Manipulators With Uncertain Kinematics and Dynamics"
  13. From Knowledge to Application
  14. Neural correlates of the enactment effect in the brain
  15. How Much Tracking Is Necessary? - The Learning Curve in Bayesian User Journey Analysis
  16. Data based analysis of order processing strategies to support the positioning between conflicting economic and logistic objectives
  17. Optimization of 3D laser scanning speed by use of combined variable step
  18. Machine Learning and Knowledge Discovery in Databases
  19. Modelling biodegradability based on OECD 301D data for the design of mineralising ionic liquids
  20. Efficient Order Picking Methods in Robotic Mobile Fulfillment Systems
  21. Towards Advanced Learning in Dispatching Rule-Based Scheuling
  22. Learning and Re-learning from net- based cooperative learning discourses
  23. Using Heider’s Epistemology of Thing and Medium for Unpacking the Conception of Documents: Gantt Charts and Boundary Objects
  24. Conceptual understanding of complex components and Nyquist-Shannon sampling theorem
  25. "And I Think That Is a Very Straightforward Way of Dealing With It''
  26. Integrating Common Ground and Informativeness in Pragmatic Word Learning
  27. Dichotomy or continuum? A global review of the interaction between autonomous and planned adaptations
  28. Migration-Based Multilingualism in the English as a Foreign Language Classroom
  29. Requests for mathematical reasoning in textbooks for primary-level students
  30. Context-sensitive adjustment of pointing in great apes

Press / Media

  1. Wieder gefragt