How are local fish communities structured in Brazilian semiarid headwater streams?

Rodrigues-Filho, Carlos Alberto de Sousa; Gurgel-Lourenço, Ronaldo César; Bezerra, Luis Artur Valões; Oliveira, Edson Fontes de; Leitão, Rafael P.; Garcez, Danielle Sequeira; Sánchez-Botero, Jorge Iván

doi:10.1007/s10750-018-3650-8

Cited by 15 publications

(7 citation statements)

References 91 publications

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“…Thus, elevation is a determining factor in fish richness in the Magdalena basin (Herrera-Pérez et al, 2019). On the other hand, the variability of water conditions at the sampling sites is associated with seasonal precipitation changes, soil types, and forest cover at the riverbanks, among others (Rodrigues-Filho et al, 2018), but these topics were not the focus of these analyses.…”

Section: Discussionmentioning

confidence: 98%

Distribution of diversity of fishes in an Andean fluvial network

Valencia-Rodríguez,

Herrera-Pérez,

Botero-Escalante

et al. 2023

Rev. Biol. Trop.

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Introduction: The distribution of freshwater fishes in the Colombian Andes results from the interaction between historical and recent factors. Currently, the Andean landscape is facing rapid transformation processes. However, the knowledge regarding species distribution and environmental requirements is advancing slower than the transformations underway in the fluvial networks. Objective: To understand the conformation of the fish assemblage in the middle and lower Cauca River basin, considering the local environmental context before the construction of the Ituango Dam, and quantifying β diversity and its two components (turnover and nestedness) amongst local fish communities. Methods: 58 localities were monitored during nine years (between February 2010 and November 2018), the period before the dam's operation. The species richness (α-diversity), species turnover (β-diversity), and assemblage composition were estimated for the given localities. Results: 114 species were recorded, representing ~ 49 % of the total richness of known species for the Magdalena basin. The richness distribution showed that the number of species varies among the aquatic environments. Swamps presented the most significant number of species, followed by the Cauca River, while streams had the lowest values of richness. The spatial analyses of β-diversity revealed a high variation component in the study area due to species replacement between the aquatic environments. Conclusions: The implementation of long-term monitoring allowed us to recognize that the Cauca River basin conserves a great variety of species-rich environments. The species turnover indicates a high proportion of endemism or multiple sites with unique species. Finally, our study will serve as a baseline to verify, over time, whether the dam's construction is associated with essential changes in the structure of fish communities.

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Section: Discussionmentioning

confidence: 98%

Distribution of diversity of fishes in an Andean fluvial network

Valencia-Rodríguez,

Herrera-Pérez,

Botero-Escalante

et al. 2023

Rev. Biol. Trop.

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“…Recent evaluations revealed that we should be concerned with the introduction of a “few widespread” species (Toussaint, Beauchard, et al., ), either unintentionally, because it culminates in biological invasions and biotic homogenization (Mazor et al., ; Pool & Olden, ; Toussaint, Charpin, et al., ). An outstanding example is the widespread occurrence of non‐native cichlid (Lima Junior et al., 2018) and cyprinid (Magalhães & Jacobi, ; Rodrigues‐Filho et al., ) fish in natural and artificial environments of South America and worldwide.…”

Section: Discussionmentioning

confidence: 99%

“…Indeed, the evolutionary theory shallowly supports ecological patterns prompted by phylogenetic history itself (Cadotte et al., ; Rodrigues‐Filho et al., ). Considering the instability associated with human history, few species are expected to be specialized (Rodrigues‐Filho et al., ) while generalists can prosper (Raoux et al., ). Food web models can also result from great subjectivity or require theoretical and experimental bases that are time‐consuming and expensive, also lacks specific aspects of adaptation.…”

Section: Perspectivesmentioning

confidence: 99%

“…However, the link between ecology and evolution is not evident in niche-based approaches (e.g., Winemiller, Fitzgerald, Bower, & Pianka, 2015) that remain arbitrarily used in conservation while it is not sure if adaptive selection acts at the species level and determines niches. Indeed, the evolutionary theory shallowly supports ecological patterns prompted by phylogenetic history itself (Cadotte et al, 2017;Rodrigues-Filho et al, 2018). Considering the instability associated with human history, few species are expected to be specialized (Rodrigues-Filho et al, 2018) while generalists can prosper (Raoux et al, 2017).…”

Section: Per S Pec Tive Smentioning

confidence: 99%

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A network meta‐analysis of threats to South American fish biodiversity

et al. 2019

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While environmental alterations have made Homo sapiens the hyperkeystone species of the globe, biotic homogenization initiated a new era, the “Homogenocene.” Still, some terrestrial and aquatic ecosystems in South America are considered pristine and wild, which can lead to a general faith that economic progress is consistent with conservation strategies, even without scientific support. We compiled anthropogenic threats to fish biodiversity in a hierarchical meta‐analysis, along with an evidence synthesis of threats related to biological invasions, based on peer‐reviewed research with the aim to represent the actual conservation status of the South American ichthyofauna. We highlighted human‐related threats and synergistic effects of biological invasions, climate change, environmental alterations (e.g., pollution, aquaculture and damming) and fisheries. Considering measures that reinforce novel alien fish (e.g., artificial hybrids or genetically modified) introductions, it became clear why an eventual increase in local or regional species richness is not always beneficial to aquaculture, biodiversity, human well‐being or nature. In fact, citizens in all societal roles, including scientists, should revise their concepts about threats to fish biodiversity. Environmental policies require more than taxonomic diagnostics to achieve conservation goals under an incompatible scenario of a multiplying number of fish species and biotic homogenization. We advocate for countries in South America using science‐based strategies useful to maintain their social and economic growth along with their “remaining nature.” We live a crucial moment when the government overlooks threats to biodiversity and uses agribusiness as the most acceptable manner of fuelling the economy.

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“…In our study, the most abundant and frequent species in the lakes are close in the functional space (Supplementary file S4). On the other hand, the most distinctive species are either estuarine or they belong to the loricariid family (the catfish Loricariichthys anus (Valenciennes, 1835) and Rineloricaria quadrensis Reis, 1983), a group that has low dispersal capacity (Pagotto et al 2011, Rodrigues-Filho et al 2018). Accordingly, the study about the dispersal capacity of the species becomes another important point for understanding the local dynamics of fish communities in this region.…”

Section: Discussionmentioning

confidence: 99%

Influences of the area, shape and connectivity of coastal lakes on the taxonomic and functional diversity of fish communities in Southern Brazil

et al. 2019

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In this study we investigated the influence of landscape variables on the alpha taxonomic and functional diversity of fish communities in coastal lakes. We built an analytical framework that included possible causal connections among variables, which we analyzed using path analysis. We obtained landscape metrics for the area, shape and connectivity (estuary connectivity and primary connectivity to neighboring lakes) of 37 coastal lakes in the Tramandaí River Basin. We collected fish data from 49 species using standardized sampling with gillnets and obtained a set of traits related to dispersal abilities and food acquisition. The model that best explained the taxonomic diversity and functional richness took into account the shape of the lakes. Functional richness was also explained by estuary connectivity. Functional evenness and dispersion were not predicted by area or connectivity, but they were influenced by the abundant freshwater species. This indicates that all lakes support most of the regional functional diversity. The results highlight the importance of the dispersal process in this lake system and allow the conclusion that considering multiple diversity dimensions can aid the conservation of local and regional fish communities.

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How are local fish communities structured in Brazilian semiarid headwater streams?

Cited by 15 publications

References 91 publications

Distribution of diversity of fishes in an Andean fluvial network

Distribution of diversity of fishes in an Andean fluvial network

A network meta‐analysis of threats to South American fish biodiversity

Influences of the area, shape and connectivity of coastal lakes on the taxonomic and functional diversity of fish communities in Southern Brazil

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