Nom du corpus

Corpus Systématique Végétale

Titre du document

Scale dependency and the expression of hierarchical structure in Delphinium patches

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Extent
  • Grain
  • Hierarchy Theory
  • Landscapes
  • Spatial Heterogeneity
Nom du fichier dans la ressource
Syst_veg6_v2_024461
Auteur(s)
  • Natasha B. Kotliar
Affiliation(s)
  • Department of Biology, Colorado State University, Fort Collins, CO, USA
Résumé

Hierarchy theory has provided a valuable conceptual framework for studies of heterogeneity. However, there have been few empirical studies of hierarchical structure and little is known about how hierarchical structure originates or varies among systems. Here, I explore how scale dependency can influence the detection of hierarchical structure. Specifically, I compared how heterogeneity changed with scale in patches of larkspur (Delphinium spp). The distribution of Delphinium nelsonii inflorescences was quite uniform over the range of measured scales (1 m2-2500 m2) and only a single level of patchiness was observed. Aggregations of D. barbeyi inflorescences were much more pronounced and this patchiness was evident at many scales. The number of hierarchical levels and the scales at which patchiness occurred varied both within and between plots of D. barbeyi. Because patchiness was not strongly scale-dependent for either species, discrete patch boundaries and well-defined hierarchical levels were not usually apparent even when multiple scales of patchiness were present. In several cases, the scales of detected patchiness depended on the difference in scale between grain (resolution) and extent. I predict that because of the lack of dominant and strongly scale-dependent processes, microlandscapes such as Delphinium meadows, may be less likely to exhibit well-defined hierarchical structure than larger-scale landscapes, especially those heavily altered by human activities.

Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - ecologie animale, vegetale et microbienne
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Plant Science
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Ecology
Identifiant ISTEX
1A78AE13AEB6E8A71A44F8BADE9746827B1CA43D
Revue

Vegetatio

Année de publication
1996
Présence de XML structuré
Non
Score qualité du texte
9.544
Version PDF
1.3
Type de publication
Journal
ark:/67375/1BB-0N8GWZ40-C
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