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Subantarctic Macquarie Island – a model ecosystem for studying animal-derived nitrogen sources using 15N natural abundance
- P. Erskine, D. Bergstrom, S. Schmidt, G. Stewart, C. Tweedie, J. Shaw
- Biology, MedicineOecologia
Plant 15N reflects the 15N of the likely nitrogen sources utilised by plants in nitrogen-limited environments, contrasting with arctic and subarctic studies that attribute large variations in plant 15N values to nitrogen partitioning in nitrogen -limited environments.
Biodiversity redistribution under climate change: Impacts on ecosystems and human well-being
The negative effects of climate change cannot be adequately anticipated or prepared for unless species responses are explicitly included in decision-making and global strategic frameworks, and feedbacks on climate itself are documented.
Antarctica’s Protected Areas Are Inadequate, Unrepresentative, and at Risk
Global comparisons show that Antarctica's terrestrial biodiversity is poorly protected. Existing protected areas are inadequate, unrepresentative, and threatened by increasing human activity.
Climate change drives expansion of Antarctic ice-free habitat
This work quantifies the impact of twenty-first century climate change on ice-free areas under two Intergovernmental Panel on Climate Change climate forcing scenarios using temperature-index melt modelling and hypothesizes that they could eventually lead to increasing regional-scale biotic homogenization, the extinction of less-competitive species and the spread of invasive species.
Challenges to the Future Conservation of the Antarctic
This work provides a horizon scan, a systematic means for identifying emerging trends and assisting decision-makers in identifying policies that address future challenges in Antarctica, and focuses on a more distant time horizon.
Initiating dialogue between scientists and managers of biological invasions
We describe an initiative to improve the flow of information between researchers and managers as part of two international scientific symposia on biological invasions held in South Africa in 2008 and…
The impact of introduced ship rats ( Rattus rattus ) on seedling recruitment and distribution of a subantarctic megaherb ( Pleurophyllum hookeri )
By excluding rats from caches of inflorescences that they had formed, it was found they were having a significant negative effect on initial recruitment and seedling survival within the caches, but because of high seedling mortality after 1 year, there was no sustained impact of the exclosures on P. hookeri seedling density.
Taxonomic homogenization and differentiation across Southern Ocean Islands differ among insects and vascular plants
Although a suite of widespread, typically European, weedy, non-indigenous plant species has established on many islands, the outcome has largely been differentiation, and the patterns documented here are likely to change through time.
Polar lessons learned: long‐term management based on shared threats in Arctic and Antarctic environments
The Arctic and Antarctic polar regions are subject to multiple environmental threats, arising from both local and ex-situ human activities. We review the major threats to polar ecosystems including…
Monitoring biological invasion across the broader Antarctic: a baseline and indicator framework.
The Antarctic Biological Invasions Indicator (ABII) provides a system for information exchange across the region and a vehicle for targeted monitoring and surveillance that enables inclusion of the region in global efforts to track both IAS and interventions for managing the threat.