Seasonal variations in growth and reproduction of Sargassum orotavicum (Fucales, Phaeophyceae) from the Canary Islands

Tania Díaz-Villa; Marta Sansón; Julio Afonso-Carrillo

doi:10.1515/bot.2005.003

Seasonal variations in growth and reproduction of Sargassum orotavicum (Fucales, Phaeophyceae) from the Canary Islands

Botanica Marina ◽

10.1515/bot.2005.003 ◽

2005 ◽

Vol 48 (1) ◽

Cited By ~ 10

Author(s):

Tania Díaz-Villa ◽

Marta Sansón ◽

Julio Afonso-Carrillo

Keyword(s):

Canary Islands ◽

Seasonal Variations ◽

Growth And Reproduction

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Seasonal variations in growth and reproduction of the earthworm Perionyx excavatus (Oligochaeta: Megascolecidae)

Biology and Fertility of Soils ◽

10.1007/s003740050509 ◽

1999 ◽

Vol 28 (4) ◽

pp. 389-392 ◽

Cited By ~ 3

Author(s):

V. A. Biradar ◽

S. D. Amoji ◽

U. M. Shagoti ◽

P. M. Biradar

Keyword(s):

Seasonal Variations ◽

Perionyx Excavatus ◽

Growth And Reproduction

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Germination rates of old and fresh seeds and their implications on invasiveness of the ornamental Canary Islands date palm (Phoenix canariensis)

European Journal of Ecology ◽

10.17161/eurojecol.v6i2.13474 ◽

2020 ◽

Vol 6 (2) ◽

Author(s):

Dirk HR Spennemann ◽

Melissa Pike ◽

Wayne Robinson

Keyword(s):

Experimental Data ◽

Genetic Diversity ◽

Environmental Factors ◽

Canary Islands ◽

Environmental Conditions ◽

Seasonal Variations ◽

Date Palm ◽

Present Stage ◽

High Genetic Diversity ◽

Phoenix Canariensis

In many countries, Canary Islands Date Palms (Phoenix canariensis) have escaped their horticulturally managed settings and have commenced to colonise surrounding natural bushland. While dispersed by various vectors, both birds and canids such as foxes, fluctuating environmental conditions may inhibit germination in the season of deposition. The potential of old, previous season’s seeds to germinate when conditions turn favourable has direct implications on the plant’s ability to establish viable, colonising populations. Nothing is known about the ability of older, previous season’s seeds to successfully germinate. Based in experimental data, this paper shows that that the seeds of Phoenix canariensis exhibit both substantial inter-specimen and inter-seasonal variations in their germination potential. The observed variability is caused by the high genetic diversity inherent in a given palm population, as well as by range of environmental factors. At the present stage it is impossible to separate these two. Directions for further research are outlined.

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