How retirees, beachcombers and communities help scientists track everything from threatened species to algal blooms

Australia is vast, and its professional scientists are few, so a growing army of amateurs is helping fill the gaps. The Conversation reports that retirees, beachcombers, bushwalkers and school students are uploading photos and observations to public repositories like iNaturalist, building long-term records that professionals can't gather alone. Their contributions span spotting rare orchids to tracking threatened species, whose populations the national index shows have fallen almost sixty percent since 2000. When a mass algal bloom began killing marine life on South Australian beaches, citizen scientists posted images and data that helped map its spread. As the piece tells it, old doubts about amateur data quality are fading as the evidence for its value mounts.

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