Coupling ordination techniques and GAM to spatially predict vegetation assemblages along a climatic gradient in an ENSO-affected region of extremely high climate variability

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

  • Jannes Muenchow
  • Hannes Feilhauer
  • Achim Bräuning
  • Fabian Bayer
  • Eric Frank Rodríguez
  • Rodolfo Arisméndiz Rodríguez
  • H. von Wehrden
Questions: El Niño Southern Oscillation (ENSO) is a strong driver of climatic and ecosystem variability in coastal NW Peru. La Niña amplifies the already dry local conditions, and led to depleted ecosystems in 2011. However, the 2012 La Niña event triggered rainfall far above the average. (1) Did plant species diversity, primary productivity and vegetation assemblages change along a climatic gradient between two climatologically different La Niña years; (2) Is there a difference in explanatory power of environmental predictors between the 2 yr; and (iii) is it possible to predict the observed vegetation patterns spatially? Location: Transect along a climatic gradient in the Sechura Desert of Piura, NW Peru (corresponds to the terrestrial part of the El Niño region 1 + 2) - a region of extremely high climatic variability. Methods: We visited 50 30 m × 30 m randomly sampled plots in 2011 and 2012. A Procrustes analysis of two non-metric multidimensional scaling (NMDS) ordinations provided information on the temporal change of species assemblages. Variation partitioning revealed the differences in explanatory power of the predictors. We employed a generalized additive model (GAM) to fit the scores of the first ordination axis with a floristic gradient map as a result. Results: Generally, higher rainfall resulted in a positive feedback when considering biodiversity, productivity and vegetation assemblages. The floristic gradient map resulting from the GAM displayed the spatial distribution of the three main assemblages along the climatic gradient. Edaphic variables added no independent portion to the explanation of the vegetation assemblages, but explained in conjunction with topography and NDVI a considerable amount of the variance. Conclusions: Strong Atlantic easterly winds crossing the Andes can boost plant growth even during a La Niña situation. This underscores the need for a deeper understanding of ENSO-related climate variability of ENSO. Combining vegetation maps with accurate predictions of such climatic anomalies would aid the effective execution of conservation and recovery strategies. Additionally, coupling an unconstrained ordination with a GAM appears to be a promising tool for vegetation mapping, especially in the presence of a non-linear gradient.
OriginalspracheEnglisch
ZeitschriftJournal of Vegetation Science
Jahrgang24
Ausgabenummer6
Seiten (von - bis)1154-1166
Anzahl der Seiten13
ISSN1100-9233
DOIs
PublikationsstatusErschienen - 01.11.2013

DOI

Zuletzt angesehen

Publikationen

  1. oREV: An item response theory-based open receptive vocabulary task for 3- to 8-year-old children
  2. Grain size statistics, composition and provenance of fragmental particles in some Apollo 14 breccias
  3. Doing statistics, enacting the nation
  4. Analytical and Experimental Performance Analysis of Enhanced Wake-Up Receivers Based on Low-Power Base-Band Amplifiers
  5. Study harder? the relationship of achievement goals to attitudes and self-reported use of desirable difficulties in self-regulated learning
  6. Broad values as the basis for understanding deliberation about protected area management
  7. A group-level theory of helping and altruism within and across group boundaries
  8. Methan - das unterschätzte Klimagas
  9. Infelicitous communication or degrees of misunderstanding
  10. Performance Saga: Interview 05
  11. Transformation archetypes in global food systems
  12. Exploring the Use of the Pronoun I in German Academic Texts with Machine Learning
  13. Methods in sustainability science
  14. Self-regulation of priming effects on behavior
  15. Model of mobility demands for future short distance public transport systems
  16. A target costing approach to developing an online distribution channel
  17. Influence of variables of the combined coagulation–Fenton-sedimentation process in the treatment of trifluraline effluent
  18. Cycling at varying load
  19. A new didactic approach in Engineering Education for conceptual understanding of Euler's Formula
  20. From niche to mainstream
  21. Combination matters
  22. Defining Value in Sustainable Business Models
  23. Complex Times, Complex Time
  24. Utilization of food waste in continuous flow cultures of the heterotrophic microalga Chlorella pyrenoidosa for saturated and unsaturated fatty acids production
  25. Das Diktat des Hashtags
  26. From Point of Sale to Point of Need
  27. Learning pragmatic routines during study abroad
  28. Archives, Architecture, and Critical Fabulation
  29. The Actions that Make a Musical Instrument
  30. Modeling the C(o)urse of Privacy-critical Location-based Services
  31. Determination of sulfur and selected trace elements in metallothionein-like proteins using capillary electrophoresis hyphenated to inductively coupled plasma mass spectrometry with an octopole reaction cell
  32. Stress corrosion of the Mg-Zn-Zr alloy system using C-ring tests
  33. Green infrastructure connectivity analysis across spatiotemporal scales
  34. Transfer fällt nicht vom Himmel!
  35. § 350
  36. Corporate hedging for different production cycles with the wavelet-approach
  37. Sustainable Development and Law
  38. Robots and Extensive Margins of Exports - Evidence for Manufacturing Firms from 27 EU Countries
  39. Activity-Based Costing as a Basis for Transfer Prices and Target Setting
  40. Wie trägt die Berufsbildung zu einer nachhaltigen Entwicklung bei?
  41. Eco Threats as Security Threats and the protection of the Environment during Hostilities