Abstract

The Ramsar Convention (or the Convention on Wetlands), signed in 1971, was one of the first international conservation agreements, promoting global wise use of wetlands. It has three primary objectives: national designation and management of wetlands of international importance; general wise use of wetlands; and international cooperation. We examined lessons learnt for improving wetland conservation after Ramsar’s nearly five decades of operation. The number of wetlands in the Ramsar Site Network has grown over time (2,391 Ramsar Sites, 2.5 million km2, as at 2020-06-09) but unevenly around the world, with decreasing rate of growth in recent decades. Ramsar Sites are concentrated in countries with a high Gross Domestic Product and human pressure (e.g., western Europe) but, in contrast, Ramsar Sites with the largest wetland extent are in central-west Africa and South America. We identified three key challenges for improving effectiveness of the Ramsar Site Network: increasing number of sites and wetland area, improved representation (functional, geographical and biological); and effective management and reporting. Increasing the number of sites and area in the Ramsar network could benefit from targets, implemented at national scales. Knowledge of representativeness is inadequate, requiring analyses of functional ecotypes, geographical and biological representativeness. Finally, most countries have inadequate management planning and reporting on the ecological character of their Ramsar Sites, requiring more focused attention on a vision and objectives, with regular reporting of key indicators to guide management. There are increasing opportunities to rigorously track ecological character, utilizing new tools and available indicators (e.g., remote sensing). It is critical that the world protect its wetlands, with an effective Ramsar Convention or the Convention on Wetlands at the core.

Highlights

  • Water crises and the collapse of biodiversity and ecosystems are among the top global risks to human well-being (World Economic Forum, 2019)

  • We provide a perspective on achieving these goals and targets, focusing on two key objectives: 1) identification of biases in the current global distribution of the Ramsar Site Network and 2) a conceptual adaptive management framework, linking maintenance of ecosystem dynamics with drivers of change

  • We explored possible associations among countries between the number and area of Ramsar Sites, area of mapped inland surface water (Pekel et al, 2016), area of protected areas (UNEP-WCMC and IUCN, 2020), Gross Domestic Product (GDP) (GIS processing World Bank DECRG, 2010) and Human Footprint Index (HFP, sum and mean, (Venter et al, 2018); Supplementary Figure S2)

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Summary

INTRODUCTION

Water crises and the collapse of biodiversity and ecosystems are among the top global risks to human well-being (World Economic Forum, 2019). Given that effective management of most inland wetlands is dependent on flow and flooding regimes of rivers (Saunders et al, 2002; Kingsford et al, 2016), we examined the distribution of Ramsar Sites and their areas, at the river basin scale (Lehner and Grill, 2013), relative to maximum extent of inland surface water between 1984 and 2018 (https://www.ngdc.noaa.gov/mgg/shorelines/gshhs.html; Pekel et al, 2016, Source: EC JRC/Google). Such mapping generally excluded vegetative flooded areas, while Ramsar Site areas included terrestrial ecosystems. Loss of a key bird species, a measure of ecological character, in a Ramsar wetland in Chile was was legally judged to have been caused by paper mill discharge impacting an aquatic plant, the bird’s main food supply (Marín et al, 2018)

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