Spatial and environmental factors predict the composition of non-native fish assemblages in Neotropical reservoirs

Muniz, Carolina Mendes; Ganassin, Maria Julia Mileo; Agostinho, Ângelo Antônio; Gomes, Luiz Carlos

doi:10.1007/s10530-019-02105-7

Cited by 8 publications

(5 citation statements)

References 38 publications

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“…), which were introduced by escapes from fish farms and sport fishing (Ortega et al., 2015) and the introduction of “guppies” in an attempt to perform biological control of mosquito‐related human diseases (Naylor et al., 2001). Some of these species presented moderate to strong parental care, and their abundance in the reservoirs seemed to increase with reservoir age (Agostinho et al., 2016; Santos et al., 2017; Muniz, Ganassin, et al., 2019) and with the degree of human impact. The reservoir age and HFI were also positively related to benthopelagic habit and invertivorous feeding.…”

Section: Discussionmentioning

confidence: 99%

“…For climate, in contrast, we may expect higher functional diversity in reservoirs in warmer and wetter locales because of the documented positive relationship between species and energy that applies to many freshwater organisms, including fish (Bailly et al., 2016; Oberdoff et al., 1995). We might also expect the dominance of traits that are usually associated with lentic environments (i.e., species with short or no migrations, some with parental care and those with generalist diets), as a result of environmental filtering and the new conditions imposed after the reservoirs were built (Muniz et al., 2019).…”

Section: Introductionmentioning

confidence: 99%

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Functional erosion and trait loss in fish assemblages from Neotropical reservoirs: The man beyond the environment

et al. 2020

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Anthropogenic impacts are altering ecosystems, especially aquatic habitats, resulting in the loss of critical biodiversity. This study aimed to evaluate the influence of human pressure, as surrogated by the human footprint index (HFI), on the functional diversity of fish assemblages from 109 Neotropical reservoirs while considering covariates such as temperature, flooded area and age since damming. We assessed two components of functional diversity (richness and dispersion) and the specific trait composition of each fish assemblage. We found that both components of fish functional diversity decreased with increasing human pressure and that this relationship was stronger in reservoirs near large cities. There was a positive relationship between functional diversity and reservoir area, and a negative relationship between functional diversity and reservoir age. We also observed strong relationships between all the explanatory variables and functional traits, particularly for the HFI. We can infer that the ichthyofaunas of those reservoirs under higher human pressure are likely undergoing a simplification process along with homogenization of functional diversity.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Functional erosion and trait loss in fish assemblages from Neotropical reservoirs: The man beyond the environment

et al. 2020

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“…Both reservoir aging and climate change are likely to amplify invasions. In older reservoirs, environments become more homogenous and invasive species become more common (Petesse and Petrere 2012 ;Muniz et al 2020 ). Therefore, habitat rehabilitations to rejuvenate reservoirs (Pegg et al 2015 ) may potentially delay the spread of invasive species.…”

Section: Invasionsmentioning

confidence: 99%

Fisheries Volume 48 Number 12 December 2023

2023

Fisheries

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“…Both reservoir aging and climate change are likely to amplify invasions. In older reservoirs, environments become more homogenous and invasive species become more common (Petesse and Petrere 2012; Muniz et al 2020). Therefore, habitat rehabilitations to rejuvenate reservoirs (Pegg et al 2015) may potentially delay the spread of invasive species.…”

Section: Invasionsmentioning

confidence: 99%

Aging, Climate, and Invasions Threaten Reservoirs in the Mississippi River Basin

Miranda

2023

Fisheries

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Reservoirs in the Mississippi River basin are facing three momentous threats. The first two, aging and climate change, are relatively slow moving and their signal can be hard to discern given their stretched temporal scales. The third, species invasions, is faster paced and discernable within shorter temporal scales and restricted spatial scales. Aging and climate directly affect reservoir environments and indirectly their biotic communities. Climate change is expected to interact with aging to speed up and, in some instances, slow down aging. Conversely, invasions primarily imperil biotic communities but can also impact environmental elements. This triple jeopardy is expected to transform reservoir environs and their biotic assemblages in various, often uncertain, ways. I take a broad view of these threats within the Mississippi River basin. A basin‐scale perspective, in contrast to a single reservoir or regional scale, may enhance awareness of reservoirs at a larger level and produce understanding less evident at local levels, hence possibly offering a wider range of choices for confronting threats. My aim is to (1) provide a synopsis of the assemblage of reservoirs and their attributes over the Mississippi River basin, (2) describe the issues related to aging, climate change, and invasions, and (3) consider a conservation framework for confronting these pressures. Given the overlapping temporal, spatial, and ecological effects of these threats, it is essential to address their effects simultaneously.

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Spatial and environmental factors predict the composition of non-native fish assemblages in Neotropical reservoirs

Cited by 8 publications

References 38 publications

Functional erosion and trait loss in fish assemblages from Neotropical reservoirs: The man beyond the environment

Functional erosion and trait loss in fish assemblages from Neotropical reservoirs: The man beyond the environment

Fisheries Volume 48 Number 12 December 2023

Aging, Climate, and Invasions Threaten Reservoirs in the Mississippi River Basin

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