Towards a More Nuanced Understanding of Long‐Distance Rafting: Case Studies From the Southern Ocean

Global Ecology and Biogeography, Journal Year: 2025, Volume and Issue: 34(2)

Published: Feb. 1, 2025

ABSTRACT Problem Rafting is now recognised as a key process influencing the distribution and connectivity of several marine coastal species. scenarios are, however, often invoked in ways that do not account for clear differences biogeographic outcomes. Here, we illustrate value utilising multiple lines evidence (e.g. different life histories, ecologies, dispersal frequencies) elucidating historical, modern, future significance ocean rafting. We discuss these issues using range exemplar studies from Southern Ocean, where rafting clearly underlies many distributional patterns, although our conclusions hold generally. Explanations Such appear to be underpinned by variations life‐history characters, with, instance, direct‐developing taxa more suited long‐distance events might span generations. success also shaped diverse suite factors including durability raft, presence/absence resources competitors (intra‐ or inter‐specific) at destination, species' environmental tolerances, latitudinal movements position oceanographic fronts, frequency intensity extreme such storms. Several are influenced climate change, so detailed understanding their roles increasingly important—particularly distributions shifting. Future Prospects The Hemisphere—which has considerably than Northern Hemisphere (81% vs. 61%)—provides biogeographers with wealth information on processes, well intriguing examples puzzles still face. Powerful new tools, high‐resolution genomic analyses, ancient DNA, environmental, ecological modelling, providing granular picture biogeographical patterns. These novel methods, together broader consideration affecting success, can pave way an improved properly integrated eco‐evolutionary outcomes via

Language: Английский

Identifying marine invasion threats and management priorities through introduction pathway analysis in a remote sub‐Antarctic ecosystem

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(4)

Published: April 1, 2024

Abstract The threat from novel marine species introductions is a global issue. When non‐native are introduced to environments and become invasive, they can affect biodiversity, industry, ecosystem function, both human wildlife health. Isolated areas with sensitive or highly specialised endemic be particularly impacted. increase in the scope of tourism other activities, together rapidly changing climate, now put these remote ecosystems under threat. In this context, we analyse invasion pathways into South Georgia Sandwich Islands (SGSSI) for via vessel biofouling. SGSSI archipelago has high biodiversity endemism, historically been isolated American mainland. islands sit just below Polar Front temperature boundary, affording some protection against introductions. However, region warming increasingly acts as gateway port traffic wider Antarctic, amplifying likelihood. We use Automatic Identification System vessel‐tracking data over 2‐year period map movement behaviour around Georgia, across ‘Scotia Sea’, ‘Magellanic’ northern ‘Continental High Antarctic’ ecoregions. find multiple types locations globe frequently enter shallow inshore waters stop prolonged periods (weeks/months) at anchor. Vessels active throughout year hubs, crossing international Management recommendations reduce likelihood within include initiating benthic hull monitoring identified activity/dispersion hubs King Edward Point, Bay Isles, Gold Harbour, St Andrews Stromness Bay. More broadly, regional collaboration coordination necessary neighbouring ports. Here vessels need increased pre‐ post‐arrival biosecurity assessment following set protocols, improved hulls biofouling pre‐emptively mitigate

Language: Английский