Dry weight costs and establishment of seeds and vegetative propagules
A garden experiment was conducted to investigate the relationship between the dry weight costs to a plant of producing seeds or vegetative propagules and their frequencies of establishment on a variety of substrates in five weedy Compositae
. Vegetative propagule weight was positively related and depth of burial negatively related to establishment success. The results are discussed in terms of costs per propagule, dispersal efficiency, and establishment success on different substrates.
The river-bed : a dynamic store for plant propagules ?
Cours d'eau ; Distribution spatiale ; Ecosystème ; England ; Habitat ; Propagule ; Royaume-Uni ; Végétation ; Végétation ripicole
This paper investigates temporal variations in the abundance, species composition and richness, and spatial distribution of plant propagules stored on river-beds. Samples of the surface layers of river-bed sediments were obtained from 2 reaches
of the River Frome, Dorset, and one reach of the River Tern, Shropshire. Propagules were preferentially stored within particular bed habitats. The preferential accumulation of sediment and species-rich propagules around stands of marginal emergent vegetation
In the northeastern state of Bahia, piassava palm - long been used for its fiber - occurs in dense stands. The AA. found in their experiments that subterranean propagules that survived range burning benefitted from the abundant soil nutrients