期刊
FRONTIERS IN MARINE SCIENCE
卷 8, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fmars.2021.622721
关键词
benthos; Antarctica; Southern Ocean; marine protected areas; vulnerable marine ecosystems; fishing
资金
- Antarctic Climate AMP
- Ecosystems Cooperative Research Centre
- PEW Charitable Trusts
- Australian Government Research Training Program (AGRTP)
- NERC
- postdoctoral contract Juan de la CiervaIncorporacion of Ministerio de Ciencia, Innovacion y Universidades [IJCI-2017-31478]
- Belgian Science Policy Office (BELSPO) [FR/36/AN1/AntaBIS]
Knowledge of life on the Southern Ocean seafloor has grown substantially, but its vulnerability to factors such as ocean temperature rise and iceberg scouring highlights the need for action to protect these habitats. Management regimes and ecosystem-based practices may be the most effective tools in preserving vulnerable seafloor habitats.
Knowledge of life on the Southern Ocean seafloor has substantially grown since the beginning of this century with increasing ship-based surveys and regular monitoring sites, new technologies and greatly enhanced data sharing. However, seafloor habitats and their communities exhibit high spatial variability and heterogeneity that challenges the way in which we assess the state of the Southern Ocean benthos on larger scales. The Antarctic shelf is rich in diversity compared with deeper water areas, important for storing carbon (blue carbon) and provides habitat for commercial fish species. In this paper, we focus on the seafloor habitats of the Antarctic shelf, which are vulnerable to drivers of change including increasing ocean temperatures, iceberg scour, sea ice melt, ocean acidification, fishing pressures, pollution and non-indigenous species. Some of the most vulnerable areas include the West Antarctic Peninsula, which is experiencing rapid regional warming and increased iceberg-scouring, subantarctic islands and tourist destinations where human activities and environmental conditions increase the potential for the establishment of non-indigenous species and active fishing areas around South Georgia, Heard and MacDonald Islands. Vulnerable species include those in areas of regional warming with low thermal tolerance, calcifying species susceptible to increasing ocean acidity as well as slow-growing habitat-forming species that can be damaged by fishing gears e.g., sponges, bryozoan, and coral species. Management regimes can protect seafloor habitats and key species from fishing activities; some areas will need more protection than others, accounting for specific traits that make species vulnerable, slow growing and long-lived species, restricted locations with optimum physiological conditions and available food, and restricted distributions of rare species. Ecosystem based management practices and long-term, highly protected areas may be the most effective tools in the preservation of vulnerable seafloor habitats. Here, we focus on outlining seafloor responses to drivers of change observed to date and projections for the future. We discuss the need for action to preserve seafloor habitats under climate change, fishing pressures and other anthropogenic impacts.
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