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Marine Protected Areas (MPAs) are globally underfunded. We present a five-step framework that can help practitioners prioritize actions that may improve financial sustainability, which was applied to six MPAs in Colombia, Bonaire, and Belize. Limited funds were found to directly undermine effectiveness towards conservation goals for five sites, with these impacts particularly significant for four. Annual budgets required increases from 6 % to 141 % to meet financial needs. Two sites had significant underlying weaknesses in their financial strategies that could lead to direct impacts if not addressed, with an additional three sites having more minor, but still observable, weaknesses in this manner. Staff salaries were the largest expense for all MPAs examined and also most frequently in need of additional funds. Opportunities to potentially eliminate these funding gaps were identified for all six MPAs through reallocating existing resources (n = 2), improving in-place mechanisms (n = 6), or implementing one or more alternative mechanisms (n = 6). Among several findings, some MPAs had the potential to increase tourism-based income by several million dollars per year, which would well exceed local financial requirements and could have substantial financial benefits on a network-wide scale. Some MPAs, including those with lower budgets, effectively leveraged partnerships and inter-institutional coordination to expand management capacity. Among alternative mechanisms that could be implemented, opportunities to leverage private-sector investments were especially common. Other MPAs around the world could likewise improve financial sustainability through analysis, evaluation, and execution of the full suite of options described herein. [ABSTRACT FROM AUTHOR]

In 2017, more than 15,000 scientists from 184 countries signed a second warning letter to humanity to caution against our continued wholesale destruction of global ecosystems (Ripple et al., 2017). Here, we reaffirm their message with a similar warning specifically focused on the ocean: humanity must immediately and significantly alter our harmful trajectory in order to avoid irrevocably damaging our oceans in multiple ways that will further affect ocean health for both us and future generations. The ocean is the world's largest realm, housing an astonishing array of biodiversity that provides critical ecological functions that ultimately support life on Earth. In this paper, we outline some of the significant ongoing and imminent activities that degrade ocean health, including destructive fishing practices, oil and natural gas extraction, seabed mining, coastal development, shipping, pollution, and greenhouse-gas emissions. We end by offering potential avenues to mitigate these impacts, including the cessation of particularly harmful activities, restoration of damaged habitats, strong protection of key and representative ecosystems, reduction in waste and emissions, and global policy shifts that prioritize ecosystem health. • The ocean hosts a vast array of biodiversity that supports all life on Earth. • Ocean health is severely threatened by a large number of anthropogenic stressors. • Humanity must take immediate, transformative action to safeguard our ocean. [ABSTRACT FROM AUTHOR]