Herbert, R. and Willis, J. and Baugh, J. (2021) The Importance of Propagule Dispersal in Maintaining Local Populations of Rare Algae on Complex Coastlines: Padina pavonica on the South Coast of England. Phycology, 1 (1). pp. 1-13.
Full text not available from this repository.Abstract
On dynamic coastlines, populations of protected algal species with poor dispersal might be especially vulnerable to infrequent recruitment events and local extinction. As a model, we here consider the dispersal of the alga Padina pavonica from the largest remaining and physically isolated enclaves on the south coast of England. A bio-physical model was used to investigate the likely importance of local propagule dispersal in maintaining populations. Dispersal kernels that simulate the position of propagules at different time steps over 5 days were examined from five release sites. Exceptionally steep declines in model propagule density were observed over the first few hours from release, yet over the first day, 75–85% of model propagules remained close to their source but had not reached other enclaves. After five days, the dispersal from source populations ranged from 0 to 50 km, with only ~5% remaining within the source 1 km2 area. Although distances of modelled propagule dispersal might be adequate for maintaining a regional population network, vegetative perrenation also appears to be important for persistence of P. pavonica. For rare and protected species on isolated and energetic coastlines, local conservation efforts, rather than a reliance on a wider meta-population network, remain very important to ensure long-term protection and survival.
| Item Type: | Article |
|---|---|
| Additional Information: | Open Access |
| Uncontrolled Keywords: | dispersal; connectivity; biogeography; bio-physical model; marine protected areas; Padina pavonica |
| Subjects: | Coasts > General |
| Divisions: | Coastal |
| Depositing User: | Helen Stevenson |
| Date Deposited: | 05 Jul 2021 09:32 |
| Last Modified: | 05 Jul 2021 09:32 |
| URI: | http://eprints.hrwallingford.com/id/eprint/1487 |
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