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Titolo:
Application of randomization methods to study the association of Trichocereus pasacana (Cactaceae) with potential nurse plants
Autore:
de Viana, ML; Suhring, S; Manly, BFJ;
Indirizzi:
Univ Nacl Salta, Catedras Ecol, RA-4400 Salta, Argentina Univ Nacl Salta Salta Argentina RA-4400 s Ecol, RA-4400 Salta, Argentina Univ Otago, Dept Matemat, Dunedin, New Zealand Univ Otago Dunedin New Zealand tago, Dept Matemat, Dunedin, New Zealand
Titolo Testata:
PLANT ECOLOGY
fascicolo: 2, volume: 156, anno: 2001,
pagine: 193 - 197
SICI:
1385-0237(2001)156:2<193:AORMTS>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARNEGIEA-GIGANTEA; CACTI; MEXICO; SHRUBS;
Keywords:
Los Cardones National Park; nurse palnts; randomization; seed bank; spatial distribution;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: de Viana, ML Univ Nacl Salta, Catedras Ecol, Buenos Aires 177, RA-4400 Salta, Argentina Univ Nacl Salta Buenos Aires 177 Salta Argentina RA-4400 ina
Citazione:
M.L. de Viana et al., "Application of randomization methods to study the association of Trichocereus pasacana (Cactaceae) with potential nurse plants", PLANT ECOL, 156(2), 2001, pp. 193-197

Abstract

Spatial distribution of plants and seeds of Trichocereus pasacana was studied in relation to bush species abundance, and of cacti in relation to the available number of seeds under bush species, in Los Cardones National Park, Argentina. Randomization tests, carried out to find the significance level of Chi squared test statistics used to test for non-random association hypothesis, proved that T. pasacana plants, seeds, and seedling establishmentis related to the different bush species that co-occur with it. Positive interactions were found mostly with L. divaricata, but also with P. ferox and A. spartioides, suggesting that they act as nurse plants. Negative interactions were found with B. boliviensis, A. spartioides, S. crassiramea, and Verbena sp, in spite of the high seed storage beneath their canopies. Cactiare more frequent than expected in relation to seed relative abundance under L. divaricata and P. ferox and less frequent under P. rougesii, B. boilviensis, Verbena sp, G. glutinosa, S. crassiramea, and A. spartioides, due to differential seed or seedling mortality when emergence occurs.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 09:30:08