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Global Economic Costs of Aquatic Invasive Alien Species
Biodiversity Conservation, BRB
Available Online

Ahmed, Danish A.

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Angulo, Elena

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Briski, Elizabeta

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Capinha, César

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Catford, Jane A.

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Cuthbert, Ross N.

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Dalu, Tatenda

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Diagne, Christophe

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Essl, Franz

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Gozlan, Rodolphe E.

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Leroy, Boris

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Pattison, Zarah

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Taylor, Nigel G.

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Verbrugge, Laura

2021
Much research effort has been invested in understanding ecological impacts of invasive alien species (IAS) across ecosystems and taxonomic groups, but empirical studies about economic effects lack synthesis. Using a comprehensive global database, we determine patterns and trends in economic costs of aquatic IAS by examining: (i) the distribution of these costs across taxa, geographic regions, and cost types; (ii) the temporal dynamics of global costs; and (iii) knowledge gaps, especially compared to terrestrial IAS. Based on the costs recorded from the existing literature, the global cost of aquatic IAS conservatively summed to US$345 billion, with the majority attributed to invertebrates (62%), followed by vertebrates (28%), then plants (6%). The largest costs were reported in North America (48%) and Asia (13%) and were principally a result of resource damages (74%); only 6% of recorded costs were from management. The magnitude and number of reported costs were highest in the United States of America and for semi-aquatic taxa. Many countries and known aquatic alien species had no reported costs, especially in Africa and Asia. Accordingly, a network analysis revealed limited connectivity among countries, indicating disparate cost reporting. Aquatic IAS costs have increased in recent decades by several orders of magnitude, reaching at least US$23 billion in 2020. Costs are likely considerably underrepresented compared to terrestrial IAS; only 5% of reported costs were from aquatic species, despite 26% of known invaders being aquatic. Additionally, only 1% of aquatic invasion costs were from marine species. Costs of aquatic IAS are thus substantial, but likely underreported. Costs have increased over time and are expected to continue rising with future invasions. We urge increased and improved cost reporting by managers, practitioners and researchers to reduce knowledge gaps. Few costs are proactive investments; increased management spending is urgently needed to prevent and limit current and future aquatic IAS damages.
Environmental Media Training for Representatives from Nine Pacific Island Countries Held in Suva
Environmental Governance, Biodiversity Conservation, Anamua: Treasures of the Pacific Environment
Available Online

Court, Caroline

A regional workshop was organized in Suva, Fiji, aimed at bolstering environmental journalism among media professionals from nine Pacific Island nations. Hosted by prominent environmental organizations, including the Secretariat of the Pacific Regional Environment Programme (SPREP), the event aimed to strengthen reporters’ ability to cover complex environmental issues, with an initial focus on climate change The Pacific is acutely vulnerable to environmental threats such as intensifying cyclones, sea-level rise, and coastal flooding, yet regional media remain under-equipped to report these dangers effectively. Better-informed journalism is seen as essential to influence policy, raise community awareness, and support climate adaptation strategies . The curriculum encompassed: Simplifying scientific and technical environmental information for broader audiences, Investigating and sourcing credible data, Crafting impactful narratives for print, radio, digital, and broadcast formats, Networking with climate and environmental experts to deepen reporting quality . Outcomes & Goals Journalists left the training inspired and better prepared, equipped with tools to translate complex climate issues into compelling public stories. The workshop aimed to foster a durable network of informed environmental correspondents across the Pacific, strengthening regional media collaboration and coverage.
Impact of Pesticides in the South Pacific: “Poisoned Paradise” – Case Studies from Tonga’s Megapode and Rarotonga’s Fly
Biodiversity Conservation, Waste Management and Pollution Control, Anamua: Treasures of the Pacific Environment
Available Online

Court, Caroline

1. Overview & Concerns A regional report titled “Poisoned Paradise” examines the environmental consequences of pesticide use across South Pacific islands, highlighting the ecological risks of toxic chemicals in agriculture and disease control . 2. Tonga – Tongan Megapode (“Malau”) The report raises concerns about pesticide exposure in Tonga’s fragile ecosystems, including impacts on unique species like the endangered Tongan megapode (Megapodius pritchardii). While direct studies are limited, ongoing threats include habitat degradation and potential chemical contamination in breeding grounds—often geothermal nests on volcanic soils. 3. Rarotonga – Indigenous Fly Species In Rarotonga (Cook Islands), pesticide usage to control agricultural pests and disease vectors (e.g., fruit flies, mosquitoes) threatens endemic insect populations, disrupting local food webs and ecological balance. Residues may accumulate in soils, water, and non-target wildlife—posing risks to biodiversity and human communities. 4. Broader Regional Themes The report indicates South Pacific nations increasingly rely on pesticides without sufficient regulation, labelling, monitoring, or disposal systems, leading to misuse and environmental contamination Over half of these countries report negative impacts from toxic chemicals in agriculture and public health initiatives, raising the need for stronger governance on chemical management. 5. Recommendations & Path Forward Strengthen regulatory frameworks: Licensing, proper labelling, safe use protocols. Build local capacity: Training for farmers, pest control operatives, and environmental officers. Promote integrated pest management and safer alternatives like biological controls. Enhance monitoring and waste disposal infrastructure to prevent environmental build-up. Foster regional cooperation to share research, best practices, and regulatory support.