Census of Marine Life

Organization and scope

More than seventy countries participated in the Census, which drew on thousands of scientists, observers and local experts. The program combined contemporary field sampling, analysis of historical archives and efforts to anticipate future research needs. Its funding came from many sources and amounted to a substantial global investment; a broad funding summary is available at funding and partners. Information on participating nations and partners can be found at participating nations.

Methods and structure

The work organized activities into complementary themes often summarized as Past, Present and Future: historical records and museum collections, contemporary surveys and targeted expeditions, and legacy projects to preserve and share the knowledge collected. Fieldwork applied a mix of traditional sampling, acoustic and photographic surveys, and molecular tools such as genetic identification to reveal cryptic diversity. The program emphasized open data and interoperable databases, notably building on and contributing to an ocean biogeographic data system; see data resources.

Results and examples

Outcomes included improved species inventories for many regions, discovery of numerous previously undescribed organisms, refined maps of species distributions and better understanding of ranges through time. Results were gathered into regional and thematic reports and synthesized for broader audiences. Selected project reports and scientific findings are collated in the program's compendium at results compendium.

Legacy and importance

Although the formal ten-year phase ended in 2010, the Census left lasting legacies: consolidated datasets, strengthened international networks, and a clearer baseline of ocean life against which future change can be measured. Its emphasis on open access data and coordination influenced subsequent marine biodiversity efforts. For institutional history and leadership information, see program history and notes on key founders and directors at leadership.

Notable facts and distinctions

• The Census combined thousands of surveys, museum studies and literature reviews to form one of the most comprehensive global marine biodiversity efforts to date.
• It fostered widespread data sharing and helped standardize methods for documenting marine life.
• Its findings continue to inform conservation planning, fisheries science and research on how marine ecosystems respond to environmental change.