Herbert, R. J.H., 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), 1 - 13.
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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 |
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ISSN: | 2673-9410 |
Additional Information: | the manuscript. Funding: The work was supported through a grant received from the Porcupine Marine Natural History Society and SITA. |
Uncontrolled Keywords: | Padina pavonica ; Connectivity ; biogeography ; bio-physical model ; Marine Protected Area |
Group: | Faculty of Science & Technology |
ID Code: | 35695 |
Deposited By: | Symplectic RT2 |
Deposited On: | 28 Jun 2021 14:07 |
Last Modified: | 14 Mar 2022 14:28 |
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