An invasive Australian crayfish species is expanding across southern Africa’s waterways, raising concerns about ecosystems, ...

Researchers using cutting-edge environmental DNA (eDNA) technology have uncovered far greater biodiversity in eastern Ontario waterways than traditional monitoring methods detected over more than a ...

Arctic rivers wind through remote tundra and boreal forests, freezing solid in winter and surging each spring with snowmelt, eventually emptying into the ocean. Runoff—water that does not soak into ...

Migratory freshwater fish populations have declined 81 percent globally since 1970. 97 percent of listed migratory fish species are threatened with extinction, with hundreds more newly identified as ...