![Conserving relics from ancient underground worlds: assessing the influence of cave and landscape features on obligate iron cave dwellers from the Eastern Amazon [PeerJ] Conserving relics from ancient underground worlds: assessing the influence of cave and landscape features on obligate iron cave dwellers from the Eastern Amazon [PeerJ]](https://peerj.com/articles/4531/graphical-abstract.jpg)
Conserving relics from ancient underground worlds: assessing the influence of cave and landscape features on obligate iron cave dwellers from the Eastern Amazon [PeerJ]
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BG - Commercial traceability of Arapaima spp. fisheries in the Amazon basin: can biogeochemical tags be useful?
![BG - Commercial traceability of Arapaima spp. fisheries in the Amazon basin: can biogeochemical tags be useful? BG - Commercial traceability of Arapaima spp. fisheries in the Amazon basin: can biogeochemical tags be useful?](https://bg.copernicus.org/articles/16/1781/2019/bg-16-1781-2019-f01-web.png)