Nom du corpus

Corpus Systématique Végétale

Titre du document

The role of mosses in the phosphorus cycling of an Alaskan black spruce forest

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Mosses
  • Mycorrhizae
  • Phosphorus cycling
  • Picea mariana
Nom du fichier dans la ressource
Syst_veg6_v2_006979
Auteur(s)
  • F. S. Chapin III 1
  • W. C. Oechel 2
  • K. Van Cleve 1
  • W. Lawrence 2
Affiliation(s)
  • 1) Institute of Arctic Biology, University of Alaska, 99775-0180, Fairbanks, AK, USA
  • 2) Systems Ecology Research Group, San Diego State University, 92115, San Diego, CA, USA
Résumé

Mosses account for 75% of the annual phosphorus accumulation in aboveground parts of an Alaskan black spruce forest, although they comprise only 17% of the phosphorus pool in aboveground vegetation. Sphagnum subsecundum and feathermosses (Hylocomium splendens and Pleurozium schreberi) have a higher capacity to absorb phosphate than do the fine roots of black spruce (Picea mariana) that are situated beneath the moss layer. In three of the four moss species studied, phosphate absorption capacity increases with increasing age of green tissue and decreases with increasing age of brown tissue. In the two feathermosses, which acquire moisture primarily from the air, and in Sphagnum, phosphate absorption is more rapid in green than in brown tissue. In contrast, the endohydric moss Polytrichum commune, which transports water through stem tissue from soil, absorbs phosphate most rapidly from stems in mineral soil. Two treatments designed to reduce activity of mycorrhizae (cutting of roots extending beneath the moss carpet or application to the moss surface of a fungicide that kills mycorrhizal hyphae) tended to increase phosphate retention by mosses and reduce phosphate transfer out of the experimental plots. This suggests that mycorrhizae are an important avenue of phosphorus movement out of the moss carpet and a means by which the black spruce competes with the overlying mosses for nutrients.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - ecology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - physiologie vegetale et developpement
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - ecology
Identifiant ISTEX
B6AE88F9E65CF2CB91AC85D566251353882BE434
Revue

Oecologia

Année de publication
1987
Présence de XML structuré
Non
Score qualité du texte
9.58
Version PDF
1.3
Type de publication
Journal
ark:/67375/1BB-0QS5K3B3-F
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