Fig 1.
Examples of freshwater shrimps with assessment of their risk of extinction status.
(A) Caridina woltereckae (EN), endemic to Lake Towuti (Sulawesi), currently under threat due to overharvesting for the aquarium trade, pollution and invasive fish species; (B) Macrobrachium vollenhoveni (LC), a widespread African species, ranging from Senegal to Angola; (C) Euryrhynchus amazoniensis (LC), a widespread Amazonian species; (D) Palaemonias alabamae (EN), known from only four cave systems in Alabama, USA, currently under threat from groundwater abstraction and habitat change.
Fig 2.
Freshwater shrimp species richness across the constituent families, expressed as a percentage of global fauna.
Table 1.
Number of freshwater shrimp species in each threat category, globally and according to biogeographic realm.
Fig 3.
Global species richness of freshwater shrimps, based on 713 out of 763 species.
Table 2.
Habitats containing over 5% of global species richness of freshwater shrimps (excluding Unknown Habitat) and their status.
Fig 4.
Global extinction risk of freshwater shrimps.
Table 3.
Freshwater shrimps currently considered as Critically Endangered (Possibly Extinct).
Fig 5.
Extinction risk in the various shrimp families, expressed as a percentage of species richness per family.
Fig 6.
Global distribution of threatened freshwater shrimp species.
Fig 7.
Major threats to freshwater shrimps.
Incorporating the proportion of species impacted by each threat, the severity of the threat upon the species, and the overall threat impact score. The proportion of threatened and NT species impacted by each threat category is shown in grey; the proportion of species-threat interactions causing rapid/very rapid declines is shown in red, whilst the average threat impact score (normalised) to 100 is shown in green. Calculations for the latter two indicators are based on threatened and NT species only.