PLANT PHENOLOGY IN RELATION TO WATER AVAILABILITY - HERBACEOUS AND WOODY SPECIES IN THE SAVANNAS OF NORTHERN CAMEROON

被引：82

作者：

SEGHIERI, J

FLORET, C

PONTANIER, R

机构：

[1] ORSTOM, 11416, Niamey

[2] CNRS-CEFE, 34 033, Montpellier

来源：

JOURNAL OF TROPICAL ECOLOGY | 1995年 / 11卷

关键词：

ADAPTATION; NORTHERN CAMEROON; PHENOLOGICAL STRATEGIES; SAVANNA; WATER RESOURCES; WATER STRESS;

D O I：

10.1017/S0266467400008713

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Phenological patterns of herbaceous and woody plants well represented in the Sudano-Sahelian savannas of northern Cameroon were studied in relation to water availability in three contrasted soil types. Mean annual precipitation in this region is 800 mm, entirely restricted to the period May-June to September-October, but redistribution of rainwater by varying soil substrates leads to considerable heterogeneity in available water resources for plants. Results are discussed in terms of probable competition for water resources among co-occurring plants and the adaptations shown by observed patterns to prevailing environmental conditions. Water stress is seen to be a limiting factor to plant growth but does not constitute the sole trigger for the phenological phases observed, nor is it the principal factor responsible for the preponderance of annual species in the herbaceous stratum.

引用

页码：237 / 254

页数：18

共 32 条

[1]

ARONSON J., KIGEL J., SHMIDA A., KLEIN J., Adaptive phenology of desert and Mediterranean populations of annual plants grown with and without water stress, Oecologia, 89, pp. 17-26, (1992)

[2]

ARONSON J., OVALLE C., AGUILERA L., LEON P., Phenology of an immigrant savanna tree (Acacia caven, Leguminosae) in the Mediterranean climate zone of Chile. Journal of Arid Environments, 27, pp. 55-70, (1994)

[3]

BILLE J.C., Analyse mathematique des relevés de vegetation en zone sahélienne., Actes du collogue de Bamako (Mali) sur I”Inventaire et cartographie des pâturages tropicaux africains, pp. 333-334, (1975)

[4]

BRABANT P., GAVAUD M., Les sols et les ressources en terre du Nord-Cameroun. Carte et notice explicative., 103, (1985)

[5]

BREMAN H., Les pâturages naturels., pp. 15-22, (1991)

[6]

BURGESS T.L., SHMIDA A., Succulent growth forms in arid environments., Arid lands: today and tomorrow., pp. 386-396, (1989)

[7]

CASENAVE A., VALENTIN C., Les états de surface de la zone sahélienne. Influence sur l'infiltration, (1989)

[8]

CISSE A.M., Dynamique de la strate herbacée des pâturages de la zone sud-sahélienne, (1986)

[9]

CRAWLEY M.J., Plant ecology, (1986)

[10]

DONFACK P., Etude de la dynamique de la vegetation aprés abandon de la culture au Nord-Cameroun, (1991)

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