Completeness of national freshwater fish species inventories around the world

DNA barcoding for identification of anuran species in the central region of South America

“…In this study, we present a comprehensive DNA barcode library for the identification of anuran species in the central region of South America, in particular, for the state of Mato Grosso do Sul (Brazil). Although political borders have no biological basis, biodiversity knowledge produced in a state can direct contribute to the design and monitoring of public policies ( Fernandes et al, 2017 ) and help the planning and management of resources ( Pelayo-Villamil et al, 2018 ). Thus, our objectives were (i) to establish DNA barcode libraries for the Anura fauna of Mato Grosso do Sul state, (ii) to make a comparison between molecular (distance-based and tree-based) methods of species delimitation and traditional taxonomy, and (iii) to evaluate the accuracy of DNA barcoding in identifying specimens.…”

Diversity Dimensions of Freshwater Fish Species around the World

“…According to Pelayo-Villamil [37], 71% of world countries had inventories of freshwater fish species that were of poor quality. Differences in the quality of inventories could be observed between countries.…”

“…Differences in the quality of inventories could be observed between countries. Furthermore, even those countries with relatively accurate and reliable national inventories had provincial and regional inventories that varied highly in completeness [37]. Therefore, whenever the available raw occurrences of the species had been used in the past, species richness in some river basins had doubtlessly been underestimated.…”

“…We made a special effort to estimate Journal of Geographic Information System the functional diversity by delineating different trait states for over 16,000 species. Surveys carried out in the different world river basins may seriously affect diversity measurements [37]. Therefore, diversity dimensions were estimated in well-surveyed basins that had been discriminated using collector's curves.…”

“…Bottom right histogram represents the percentage of world river basins selected by the different combinations of diversity components, when the continuous values representing each diversity component are transformed in binary ones by using as threshold those values equal or higher than upper quartiles. the many limitations that stem from the biases and gaps in information about different diversity components[4] [37]. These shortcomings are evident in our analysis since only 13% of world river basins were defined as well-surveyed.…”