Scientific Studies & Research

This paper highlights examples of the planning methods available that can be utilized so these areas can be targeted for protection. We discuss issues related to trade-offs regarding how to prioritise amongst them as well as to operationalise some of the vaguer concepts like ‘representation’ and ‘ecosystem functions and services’ so that they achieve the best outcomes for biodiversity.

This paper identifies where different conservation actions, ranging from marine protected areas to broader policy approaches, might best overcome anthropogenic threats to these areas. This analysis shows that 26%–41% of the ocean (depending on targets used for species representation) needs to be effectively managed and conserved through a combination of site-based actions and broad policy responses to achieve global conservation and sustainable development agendas.

This report shows that—of 19,937 vertebrate species globally—the representation of environmental conditions across their habitats in protected areas (hereafter, niche representation) is inadequate for 4,836 (93.1%) amphibian, 8,653 (89.5%) bird and 4,608 (90.9%) terrestrial mammal species.

This report creates conservation spatial plans to minimize extinction risk in the tropics using data on 289 219 species and modeling two future greenhouse gas concentration pathways (RCP2.6 and 8.5) while varying the extent of terrestrial protected land and conserved areas from <17% to 50%. We find that limiting climate change to 2°C and conserving 30% of terrestrial area could more than halve aggregate extinction risk compared with uncontrolled climate change and no increase in conserved area.

A review of the scientific evidence for large-scale percentage area conservation targets

We surveyed 335 conservation scientists, from 81 countries, in English, French and Spanish for views on area-based conservation relating to the Strategic Plan for Biodiversity 2011–2020 of the Convention on Biological Diversity and potential future targets, especially a successor to Aichi Target 11

The UN's globally adopted Convention on Biological Diversity coverage target for marine protected areas (MPAs) is ≥10% by 2020. In 2014, the World Parks Congress recommended increasing this to ≥30%. We reviewed 144 studies to assess whether the UN target is adequate to achieve, maximize, or optimize six environmental and/or socioeconomic objectives.

Should conservation targets, such as the proportion of a region to be placed in protected areas, be socially acceptable from the start? Or should they be based unapologetically on the best available science and expert opinion, then address issues of practicality later? Such questions strike to the philosophical core of conservation.

This paper identifies eight priority issues that need to be addressed in unison to help avert a potential ecological disaster in the global ocean. They form a purposely ambitious agenda for global governance and are aimed at informing decision-makers at a high level. They should also be of interest to the general public.

The Global Deal for Nature (GDN) is a time-bound, science-driven plan to save the diversity and abundance of life on Earth. Pairing the GDN and the Paris Climate Agreement would avoid catastrophic climate change, conserve species, and secure essential ecosystem services.