The future of the South Georgia and South Sandwich Islands marine protected area in a changing environment: The choice between industrial fisheries, or ecosystem protection

Trathan, Philip N.

doi:10.1016/j.marpol.2023.105773

Cited by 6 publications

(1 citation statement)

References 95 publications

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“…The D. eleginoides stock is linked to the stock at South Georgia ('Northern Scotia Sea')(Collins et al 2010), while the D. mawsoni stock is linked to the Antarctic continental shelf ('Southern Scotia Sea')(Soeffker et al 2022). Despite the fact that the mentioned fisheries are certified by the Marine Stewardship Council standards,Trathan (2023) identified several concerns regarding aspects of fisheries itself, other species' population status (i.e. recovery of baleen whales), and environmental stressors (i.e.…”

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The response of trophic interaction networks to multiple stressors in a marine latitudinal gradient of the Southern Hemisphere

Marina,

Saravia,

Rodriguez

et al. 2024

Preprint

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Ecological networks offer valuable insights into community structure, key species identification, and ecosystem management for biodiversity conservation. Understanding how these networks react to environmental and anthropogenic stressors, especially along geographical gradients, is of increasing interest. This review presents a pioneering analysis of stressor responses in marine food webs from the southwest Atlantic to the Antarctic (45 - 78ºS), encompassing areas such as San Jorge Gulf, Beagle Channel, Burdwood Bank, Scotia Sea, Potter Cove, and the Weddell Sea in Antarctica. Our objectives are to: 1) describe the structure of marine food webs along this axis using a network approach; 2) identify predominant environmental and anthropogenic stressors affecting each ecosystem; and 3) summarize observed food web changes and hypothesize on stressor impacts. Our collaborative team, comprising regional experts and global authorities on high-latitude marine food webs and stressor effects, ensures a comprehensive and credible literature review. We assessed the effects of stressors primarily at the species level, with notable exceptions like fisheries in San Jorge Gulf. Hypotheses for each study area were formulated considering: a) stressors; b) impacted parameters; c) node-level species properties; and d) network-level food web properties. Global warming emerges as the most common stressor across the gradient, except in the Beagle Channel and Burdwood Bank, where alien species introduction and fisheries are more influential, respectively. We offer specific hypotheses on how warming may affect food webs. Our findings highlight the benefits of a network approach in understanding and predicting stressor effects in Southern Hemisphere marine ecosystems. This approach provides a holistic understanding of ecological networks, enhances our ability to identify key species and interactions, and offers insights for ecosystem management and conservation in the face of various stressors.

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confidence: 99%

The response of trophic interaction networks to multiple stressors in a marine latitudinal gradient of the Southern Hemisphere

Marina,

Saravia,

Rodriguez

et al. 2024

Preprint

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Occurrence and distribution of phycotoxins in the Antarctic Ocean

Tang,

He,

Chen

et al. 2024

Marine Pollution Bulletin

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Refinement of the Antarctic fur seal (Arctocephalus gazella) reference genome increases continuity and completeness

Hench,

Vendrami,

Forcada

et al. 2024

G3: Genes, Genomes, Genetics

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The Antarctic fur seal (Arctocephalus gazella) is an important top predator and indicator of the health of the Southern Ocean ecosystem. Although abundant, this species narrowly escaped extinction due to historical sealing and is currently declining as a consequence of climate change. Genomic tools are essential for understanding these anthropogenic impacts and for predicting long-term viability. However, the current reference genome (“arcGaz3”) shows considerable room for improvement in terms of both completeness and contiguity. We therefore combined PacBio sequencing, haplotype-aware HiRise assembly and scaffolding based on Hi-C information to generate a refined assembly of the Antarctic fur seal reference genome (“arcGaz4_h1”). The new assembly is 2.53Gb long, has a scaffold N50 of 55.6Mb and includes 18 chromosome-sized scaffolds, which correspond to the 18 chromosomes expected in otariids. Genome completeness is greatly improved, with 23,408 annotated genes and a Benchmarking Universal Single-Copy Orthologs (BUSCO) score raised from 84.7% to 95.2%. We furthermore included the new genome in a reference-free alignment of the genomes of eleven pinniped species to characterize evolutionary conservation across the Pinnipedia using genome-wide Genomic Evolutionary Rate Profiling (GERP). We then implemented Gene Ontology (GO) enrichment analyses to identify biological processes associated with those genes showing the highest levels of either conservation or differentiation between the two major pinniped families, the Otariidae and Phocidae. We show that processes linked to neuronal development, the circulatory system and osmoregulation are overrepresented both in conserved as well as in differentiated regions of the genome.

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The future of the South Georgia and South Sandwich Islands marine protected area in a changing environment: The choice between industrial fisheries, or ecosystem protection

Cited by 6 publications

References 95 publications

The response of trophic interaction networks to multiple stressors in a marine latitudinal gradient of the Southern Hemisphere

The response of trophic interaction networks to multiple stressors in a marine latitudinal gradient of the Southern Hemisphere

Occurrence and distribution of phycotoxins in the Antarctic Ocean

Refinement of the Antarctic fur seal (Arctocephalus gazella) reference genome increases continuity and completeness

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