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Titolo:
Estimates of structural complexity in clonal plant morphology: comparisonsof grazed and ungrazed Acaena magellanica rhizomes
Autore:
Moen, J; Ingvarsson, PK; Walton, DWH;
Indirizzi:
Umea Univ, Dept Ecol & Environm Sci, S-90187 Umea, Sweden Umea Univ UmeaSweden S-90187 Ecol & Environm Sci, S-90187 Umea, Sweden British Antarctic Survey, Cambridge CB3 0ET, England British Antarctic Survey Cambridge England CB3 0ET idge CB3 0ET, England
Titolo Testata:
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE
fascicolo: 6, volume: 77, anno: 1999,
pagine: 869 - 876
SICI:
0008-4026(199906)77:6<869:EOSCIC>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
ROOT SYSTEMS; INTRODUCED REINDEER; FRACTAL DIMENSION; SOUTH-GEORGIA; ARCHITECTURE; VEGETATION; ECOLOGY;
Keywords:
Acaena magellanica; fractal dimension; grazing; growth simulation; topology;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Moen, J Umea Univ, Dept Ecol & Environm Sci, S-90187 Umea, Sweden Umea Univ Umea Sweden S-90187 Environm Sci, S-90187 Umea, Sweden
Citazione:
J. Moen et al., "Estimates of structural complexity in clonal plant morphology: comparisonsof grazed and ungrazed Acaena magellanica rhizomes", CAN J BOTAN, 77(6), 1999, pp. 869-876

Abstract

The aim of this study is to examine the information given by various indices of rhizome morphology that describe grazed and ungrazed rhizome systems of Acaena magellanica (Rosaceae). Internode lengths, branching probabilities, and branching angles were estimated from grazed and ungrazed rhizomes inthe field. These parameter values were then used in computer simulations of rhizome growth, and the structural complexity of the simulated rhizomes were described using size, topology, and fractal dimensions. Grazed rhizomeshad shorter internodes, higher probabilities of branching, and more open branching angles than ungrazed rhizomes. This resulted in a more directionalgrowth (herring-bone pattern) in the simulated ungrazed rhizomes, whereas the grazed rhizomes had a more space-filling growth pattern. Most indices, even though they are based on different mathematical and theoretical backgrounds, were highly correlated and thus equally good at describing the structural complexity exhibited by the rhizomes. However, indices have differentrelationships to theories about function, and we suggest that any study ofstructural complexity of branching systems should use several different indices of shape depending on the questions asked.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 08:00:55