Crossing the front: contrasting storm-forced dispersal dynamics revealed by biological, geological and genetic analysis of beach-cast kelp
| Autor: | Dave Craw, Ceridwen I. Fraser, Jonathan M. Waters, Tania M. King |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Water mass Biomedical Engineering Biophysics Kelp Antarctic Regions Life Sciences–Earth Science interface Bioengineering 010603 evolutionary biology 01 natural sciences Biochemistry Biomaterials biology Cyclonic Storms 010604 marine biology & hydrobiology Front (oceanography) Storm biology.organism_classification Durvillaea Oceanography Cyclone Biological dispersal Subtropical front Geology Biotechnology New Zealand |
| Zdroj: | Journal of the Royal Society, Interface. 15(140) |
| ISSN: | 1742-5662 |
| Popis: | The subtropical front (STF) generally represents a substantial oceanographic barrier to dispersal between cold-sub-Antarctic and warm-temperate water masses. Recent studies have suggested that storm events can drastically influence marine dispersal and patterns. Here we analyse biological and geological dispersal driven by two major, contrasting storm events in southern New Zealand, 2017. We integrate biological and physical data to show that a severe southerly system in July 2017 disrupted this barrier by promoting movement of substantial numbers of southern sub-Antarctic Durvillaea kelp rafts across the STF, to make landfall in mainland NZ. By contrast, a less intense easterly storm (Cyclone Cook, April 2017) resulted in more moderate dispersal distances, with minimal dispersal between the sub-Antarctic and mainland New Zealand. These quantitative analyses of approximately 200 freshly beach-cast kelp specimens indicate that storm intensity and wind direction can strongly influence marine dispersal and landfall outcomes. |
| Databáze: | OpenAIRE |
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