The variable routes of rafting: stranding dynamics of floating bull kelp Durvillaea antarctica (Fucales, Phaeophyceae) on beaches in the SE Pacific
Dispersal on floating seaweeds depends on availability, viability, and trajectories of the rafts. In the southern hemisphere, the bull kelp Durvillaea antarctica is one of the most common floating seaweeds, but phylogeographic studies had shown low connectivity between populations from continental C...
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crwiley:10.1111/jpy.12479 2024-10-06T13:44:05+00:00 The variable routes of rafting: stranding dynamics of floating bull kelp Durvillaea antarctica (Fucales, Phaeophyceae) on beaches in the SE Pacific López, Boris A. Macaya, Erasmo C. Tala, Fadia Tellier, Florence Thiel, Martin Buschmann, A. Comisión Nacional de Investigación Científica y Tecnológica 2016 http://dx.doi.org/10.1111/jpy.12479 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjpy.12479 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.12479 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Phycology volume 53, issue 1, page 70-84 ISSN 0022-3646 1529-8817 journal-article 2016 crwiley https://doi.org/10.1111/jpy.12479 2024-09-11T04:15:57Z Dispersal on floating seaweeds depends on availability, viability, and trajectories of the rafts. In the southern hemisphere, the bull kelp Durvillaea antarctica is one of the most common floating seaweeds, but phylogeographic studies had shown low connectivity between populations from continental Chile, which could be due to limitations in local supply and dispersal of floating kelps. To test this hypothesis, the spatiotemporal dynamics of kelp strandings were examined in four biogeographic districts along the Chilean coast (28°–42°S). We determined the biomass and demography of stranded individuals on 33 beaches for three subsequent years (2013, 2014, 2015) to examine whether rafting is restricted to certain districts and seasons (winter or summer). Stranded kelps were found on all beaches. Most kelps had only one stipe (one individual), although we also frequently found coalesced holdfasts with mature males and females, which would facilitate successful rafting dispersal, gamete release, and reproduction upon arrival. High biomasses of stranded kelps occurred in the northern‐central (30°S–33°S) and southernmost districts (37°S–42°S), and lower biomasses in the northernmost (28°S–30°S) and southern‐central districts (33°S–37°S). The highest percentages and sizes of epibionts ( Lepas spp.), indicative of prolonged floating periods, were found on stranded kelps in the northernmost and southernmost districts. Based on these results, we conclude that rafting dispersal can vary regionally, being more common in the northernmost and southernmost districts, depending on intrinsic (seaweed biology) and extrinsic factors (shore morphology and oceanography) that affect local supply of kelps and regional hydrodynamics. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Pacific Journal of Phycology 53 1 70 84 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Dispersal on floating seaweeds depends on availability, viability, and trajectories of the rafts. In the southern hemisphere, the bull kelp Durvillaea antarctica is one of the most common floating seaweeds, but phylogeographic studies had shown low connectivity between populations from continental Chile, which could be due to limitations in local supply and dispersal of floating kelps. To test this hypothesis, the spatiotemporal dynamics of kelp strandings were examined in four biogeographic districts along the Chilean coast (28°–42°S). We determined the biomass and demography of stranded individuals on 33 beaches for three subsequent years (2013, 2014, 2015) to examine whether rafting is restricted to certain districts and seasons (winter or summer). Stranded kelps were found on all beaches. Most kelps had only one stipe (one individual), although we also frequently found coalesced holdfasts with mature males and females, which would facilitate successful rafting dispersal, gamete release, and reproduction upon arrival. High biomasses of stranded kelps occurred in the northern‐central (30°S–33°S) and southernmost districts (37°S–42°S), and lower biomasses in the northernmost (28°S–30°S) and southern‐central districts (33°S–37°S). The highest percentages and sizes of epibionts ( Lepas spp.), indicative of prolonged floating periods, were found on stranded kelps in the northernmost and southernmost districts. Based on these results, we conclude that rafting dispersal can vary regionally, being more common in the northernmost and southernmost districts, depending on intrinsic (seaweed biology) and extrinsic factors (shore morphology and oceanography) that affect local supply of kelps and regional hydrodynamics. |
author2 |
Buschmann, A. Comisión Nacional de Investigación Científica y Tecnológica |
format |
Article in Journal/Newspaper |
author |
López, Boris A. Macaya, Erasmo C. Tala, Fadia Tellier, Florence Thiel, Martin |
spellingShingle |
López, Boris A. Macaya, Erasmo C. Tala, Fadia Tellier, Florence Thiel, Martin The variable routes of rafting: stranding dynamics of floating bull kelp Durvillaea antarctica (Fucales, Phaeophyceae) on beaches in the SE Pacific |
author_facet |
López, Boris A. Macaya, Erasmo C. Tala, Fadia Tellier, Florence Thiel, Martin |
author_sort |
López, Boris A. |
title |
The variable routes of rafting: stranding dynamics of floating bull kelp Durvillaea antarctica (Fucales, Phaeophyceae) on beaches in the SE Pacific |
title_short |
The variable routes of rafting: stranding dynamics of floating bull kelp Durvillaea antarctica (Fucales, Phaeophyceae) on beaches in the SE Pacific |
title_full |
The variable routes of rafting: stranding dynamics of floating bull kelp Durvillaea antarctica (Fucales, Phaeophyceae) on beaches in the SE Pacific |
title_fullStr |
The variable routes of rafting: stranding dynamics of floating bull kelp Durvillaea antarctica (Fucales, Phaeophyceae) on beaches in the SE Pacific |
title_full_unstemmed |
The variable routes of rafting: stranding dynamics of floating bull kelp Durvillaea antarctica (Fucales, Phaeophyceae) on beaches in the SE Pacific |
title_sort |
variable routes of rafting: stranding dynamics of floating bull kelp durvillaea antarctica (fucales, phaeophyceae) on beaches in the se pacific |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/jpy.12479 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjpy.12479 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jpy.12479 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Journal of Phycology volume 53, issue 1, page 70-84 ISSN 0022-3646 1529-8817 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jpy.12479 |
container_title |
Journal of Phycology |
container_volume |
53 |
container_issue |
1 |
container_start_page |
70 |
op_container_end_page |
84 |
_version_ |
1812182496296566784 |