Thematic Area

The world has recognized the reefs of New Caledonia as hosting some of the most beautiful and well-preserved tropical marine habitats, globally. New Caledonia is isolated in the southwest Pacific Ocean, about 1,300 km east of Australia. The country is situated in the Coral Sea, which hosts some of the most biodiverse coral reefs in the world. In July 2008, UNESCO declared the Entrecasteaux Atolls, as well as the lagoon surrounding Grande Terre, and four other marine sites, as official World Heritage Sites with the goal of preserving and protecting New Caledonia’s coral reef habitats.

This review represents an analysis of literature addressing the predicted and potential impacts of mining deep sea nodules in the Southwest, Central, and Northeast Pacific. More than 250 scientific and other articles were examined to explore what is known — and what remains unknown — about the risks of nodule mining to Pacific Ocean habitats, species, ecosystems and the people who rely on them. The report details scientifically established risks, including those related to the lack of knowledge surrounding this emerging industry.

Coral reefs worldwide are suffering mass mortalities from marine heat waves. With the aim of enhancing coral bleaching tolerance, we evolved 10 clonal strains of a common coral microalgal endosymbiont at elevated temperatures (31°C) for 4 years in the laboratory. All 10 heat-evolved strains had expanded their thermal tolerance in vitro following laboratory evolution. After reintroduction into coral host larvae, 3 of the 10 heat-evolved endosymbionts also increased the holobionts’ bleaching tolerance.

The COVID-19 pandemic has rapidly spread around the world with extensive social and economic effects. This editorial focuses specifically on the implications of the pandemic for small-scale fishers, including marketing and processing aspects of the sector, and coastal fishing communities, drawing from news and reports from around the world.

The Guide contains information about essential components and sub-components of marine spatial planning legislation, describing each and highlighting its role and significance. The Guide also provides examples of textual provisions from existing marine spatial planning laws and regulations, along with sample provisions prepared by the authors, to illustrate how legislative or regulatory language can address each component. Appendix A contains a list of marine spatial planning laws to which the legal drafter can refer.

Invasive species pose a significant threat to a primary objective of marine conservation, protecting native biodiversity. To-date, research quantifying invasion risk to marine protected areas (MPAs) is limited despite potential negative consequences. As a first step towards identifying invasion risk to MPAs via vessel ballast or biofouling, we evaluated vessel traffic patterns by applying graph-theoretic concepts for 1346 vessels that connected invaded areas (‘invasion nodes’) along the Northeast Pacific coast to MPAs within Canadian waters in 2016.

Marine protected areas can serve to regulate harvesting and conserve biodiversity. Within large multi-use MPAs, it is often unclear to what degree critical sites of biodiversity are afforded protection against commercial activities. Addressing this issue is a prerequisite if we are to appropriately assess sites against conservation targets. We evaluated whether the management regime of a large MPA conserved sites (Key Biodiversity Areas, KBAs) supporting the global persistence of top marine predators.

Sustainable Development Goal 14 of the United Nations aims to “conserve and sustainably use the oceans, seas and marine resources for sustainable development”. Achieving this goal will require rebuilding the marine life-support systems that deliver the many benefits that society receives from a healthy ocean. Here we document the recovery of marine populations, habitats and ecosystems following past conservation interventions.

Local communities’ support for resource conservation projects are essential for their success. Nevertheless, in the Pacific Island countries, many community-based conservation (CBC) projects remain ineffective due to the lack of community members’ engagement. To better understand the motivations of local community members to support resource conservation projects; this research looks at the four community-based conservation sites in North Tarawa, Kiribati.

Marine megafauna, the largest animals in the oceans, serve key roles in ecosystem functioning. Yet, one-third of these animals are at risk of extinction. To better understand the potential consequences of megafaunal loss, here we quantify their current functional diversity, predict future changes under different extinction scenarios, and introduce a new metric [functionally unique, specialized and endangered (FUSE)] that identifies threatened species of particular importance for functional diversity.