Erratum: Global threats to human water security and river biodiversity

Vörösmarty, Charles J; McIntyre, Peter B.; Gessner, Mark O.; Dudgeon, David; Prusevich, Alexander; Green, P.; Glidden, Stanley; Bunn, Stuart E.; Sullivan, Caroline A; Liermann, Catherine Reidy; Davies, Peter M.

doi:10.1038/nature09549

Cited by 360 publications

(361 citation statements)

References 1 publication

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“…Based on our results, we appeal for studies to focus on the areas that experience high homogenization trends. Because most of these areas are also recognized as gathering a high number of threatened species and facing a large range of human-induced physical disturbances (3,6), local and detailed studies are urgently needed to decide whether it is appropriate or not to set up efficient control, remediation, and eradication procedures (32). In addition to ecological concerns, further studies are needed to answer societal questions, such as how taxonomic homogenization will modify our perception of biodiversity through the loss of cultural landmarks.…”

Section: Resultsmentioning

confidence: 99%

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Homogenization patterns of the world’s freshwater fish faunas

Villéger

Blanchet

Beauchard

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

203

158

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The world is currently undergoing an unprecedented decline in biodiversity, which is mainly attributable to human activities. For instance, nonnative species introduction, combined with the extirpation of native species, affects biodiversity patterns, notably by increasing the similarity among species assemblages. This biodiversity change, called taxonomic homogenization, has rarely been assessed at the world scale. Here, we fill this gap by assessing the current homogenization status of one of the most diverse vertebrate groups (i.e., freshwater fishes) at global and regional scales. We demonstrate that current homogenization of the freshwater fish faunas is still low at the world scale (0.5%) but reaches substantial levels (up to 10%) in some highly invaded river basins from the Nearctic and Palearctic realms. In these realms experiencing high changes, nonnative species introductions rather than native species extirpations drive taxonomic homogenization. Our results suggest that the “Homogocene era” is not yet the case for freshwater fish fauna at the worldwide scale. However, the distressingly high level of homogenization noted for some biogeographical realms stresses the need for further understanding of the ecological consequences of homogenization processes.

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Section: Resultsmentioning

confidence: 99%

“…H uman activities affect both abiotic (e.g., global warming, pollution) and biotic (e.g., overexploitation, species introduction) components of ecosystems (1)(2)(3). Anthropogenic stressors are responsible for changes in species assemblages through two complementary processes: extirpations and introductions (4).…”

mentioning

confidence: 99%

Homogenization patterns of the world’s freshwater fish faunas

Villéger

Blanchet

Beauchard

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

203

158

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“…However, the increasing use of water resources contributed to the loss of biodiversity and ecological integrity of such environments (ARAI et al, 2012;VOROSMARTY et al, 2010). Human activities associated with the use of water led to a number of morphological changes in the watercourses (TUHTAN et al, 2012), reducing their heterogeneity and, consequently, the availability of adequate physical habitats for aquatic species (HOLMQUIST & WADDLE, 2013).…”

Section: Introductionmentioning

confidence: 99%

One- And Two-Dimensional Ecohydraulic Modeling of Formoso River (Mg)

et al. 2016

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ABSTRACT:The objective of this study was to compare ecohydrological simulations from a onedimensional model (PHABSIM -Physical Habitat Simulation System) and a two-dimensional model (River2D) in order to indicate a reliable tool that could be used to determine public policies for the sustainable management of the water resources of the Formoso River basin (MG). The results from the calibration of hydraulic variables, namely, water depth and velocity, as well as habitat predictions for three fish species of the river were compared. The results showed that River2D was best suited to simulate ecohydrological features for the studied river stretch. Although PHABSIM presented a better fit of the hydraulic variables at the calibration process, the use of only three monitoring cross sections to compose the biotic model database compromised its habitat modeling. PHABSIM model was not able to accurately assess the actual characteristics of the physical habitat in the segments of the river located between the monitoring cross sections.

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“…The modification of temperature and precipitation regimes have the potential to have detrimental (or beneficial) effects and cause synergistic or antagonistic effects on species and communities [1]. Expected changes vary between cold, temperate and warm ecoregions, and could affect species due to changes in, among others, temperature, flow patterns, and nutrient concentrations [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Severity Multipliers as a Methodology to Explore Potential Effects of Climate Change on Stream Bioassessment Programs

Jähnig

Tonkin

Gies

et al. 2017

Water

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Given the scientific consensus that climate change is impacting biodiversity, estimates of future climate change effects on stream communities and assessments of potential biases are necessary. Here, we propose a simple technique to approximate changes in invertebrate and fish biomonitoring results. Taxa lists for 60 (invertebrate) and 52 (fish) sites were each modified by 10 multipliers as stepwise 5% or 10% changes in abundances to simulate potential climate-change severity, reflecting increasing climate change effects. These 10 multipliers were based on the stream zonation preference for invertebrates and the Fish Region Index (FRI) values for fish, both reflecting the longitudinal gradient present in river ecosystems. The original and modified taxa lists were analyzed using the standard assessment software for the particular group, followed by analysis of key biomonitoring metrics. For invertebrates, our simulations affected small good quality streams more often negatively while large poor mountain streams showed a tendency to improve. Forty percent of the invertebrate data sites showed a change in the final ecological assessment class when using the multipliers, with the poor quality sites changing more often. For fish, metric changes were variable, but the FRI ratio showed mostly positive responses, i.e., a shift in FRI towards downstream communities. The results are discussed as an example that facilitates the interpretation of potential climate-change effects with varying severity. Further, we discuss the simplified approach and implications for assessment from climate change induced range shifts.

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Erratum: Global threats to human water security and river biodiversity

Cited by 360 publications

References 1 publication

Homogenization patterns of the world’s freshwater fish faunas

Homogenization patterns of the world’s freshwater fish faunas

One- And Two-Dimensional Ecohydraulic Modeling of Formoso River (Mg)

Severity Multipliers as a Methodology to Explore Potential Effects of Climate Change on Stream Bioassessment Programs

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