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Article ; Online: French vote for river barriers defies biodiversity strategy.

Blanchet, Simon / Tedesco, Pablo A

2021 Volume 594, Issue 7861, Page(s) 26

MeSH term(s)	Biodiversity ; Ecosystem ; Rivers
Language	English
Publishing date	2021-06-01
Publishing country	England
Document type	Letter ; Comment
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/d41586-021-01467-0
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Article ; Online: Same process, different patterns: pervasive effect of evolutionary time on species richness in freshwater fishes.

García-Andrade, Ana Berenice / Tedesco, Pablo A / Carvajal-Quintero, Juan D / Arango, Axel / Villalobos, Fabricio

Proceedings. Biological sciences

2023 Volume 290, Issue 2006, Page(s) 20231066

Abstract: Tropical lands harbour the highest number of species, resulting in the ubiquitous latitudinal diversity gradient (LDG). However, exceptions to this pattern have been observed in some taxa, explained by the interaction between the evolutionary histories ... ...

Abstract	Tropical lands harbour the highest number of species, resulting in the ubiquitous latitudinal diversity gradient (LDG). However, exceptions to this pattern have been observed in some taxa, explained by the interaction between the evolutionary histories and environmental factors that constrain species' physiological and ecological requirements. Here, we applied a deconstruction approach to map the detailed species richness patterns of Actinopterygian freshwater fishes at the class and order levels and to disentangle their drivers using geographical ranges and a phylogeny, comprising 77% (12 557) of all described species. We jointly evaluated seven evolutionary and ecological hypotheses posited to explain the LDG: diversification rate, time for speciation, species-area relationship, environmental heterogeneity, energy, temperature seasonality and past temperature stability. We found distinct diversity gradients across orders, including expected, bimodal and inverse LDGs. Despite these differences, the positive effect of evolutionary time explained patterns for all orders, where species-rich regions are inhabited by older species compared to species-poor regions. Overall, the LDG of each order has been shaped by a unique combination of factors, highlighting the importance of performing a joint evaluation of evolutionary, historical and ecological factors at different taxonomic levels to reach a comprehensive understanding on the causes driving global species richness patterns.
MeSH term(s)	Animals ; Biological Evolution ; Phylogeny ; Fishes ; Fresh Water ; Geography
Language	English
Publishing date	2023-09-13
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	209242-6
ISSN	1471-2954 ; 0080-4649 ; 0962-8452 ; 0950-1193
ISSN (online)	1471-2954
ISSN	0080-4649 ; 0962-8452 ; 0950-1193
DOI	10.1098/rspb.2023.1066
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Article ; Online: Accessibility and appeal jointly bias the inventory of Neotropical freshwater fish fauna

Herrera-R, Guido A. / Tedesco, Pablo A. / DoNascimiento, Carlos / Jézéquel, Céline / Giam, Xingli

Biological Conservation. 2023 Aug., v. 284 p.110186-

2023

Abstract: Inventorying biodiversity is fundamental to overcoming knowledge shortfalls in species discovery and description (Linnean shortfall), their distributions (Wallacean shortfall) and abiotic niches (Hutchinsonian shortfall). However, inventorying efforts ... ...

Abstract	Inventorying biodiversity is fundamental to overcoming knowledge shortfalls in species discovery and description (Linnean shortfall), their distributions (Wallacean shortfall) and abiotic niches (Hutchinsonian shortfall). However, inventorying efforts often show spatial biases, and the underlying causes have only been explored at large spatial extents for the most well-known terrestrial taxa. Improving our understanding of these biases and their drivers is particularly crucial in the speciose tropics, where biodiversity knowledge suffers the most from knowledge shortfalls. Using the most complete information available on freshwater fish distributions in three regions in the Neotropics (Orinoco and Trans-Andeans, the Amazon and the La Plata basins), first, we evaluated environmental biases in inventory effort and completeness across sub-basins. Further, we examined three hypotheses (Accessibility, Appeal, and Safety) to explain the differences in contemporary (2000–2018) inventorying efforts. The Accessibility and Appeal hypotheses were well-supported and conjointly explained a moderate proportion of the spatial variation in the inventorying effort. By contrast, the Safety hypothesis predictors showed limited support. The most accessible sub-basins (i.e., lower travel time from cities or closer to fluvial ports) experienced higher inventorying effort regarding the number of unique inventorying locations and years inventoried. Our results suggest that differences in Accessibility alone may be insufficient to explain inventorying biases. Inventorying efforts were also biased against sub-basins with lower biodiversity and habitat diversity, showing preferential sampling driven by sub-basins' Appeal. The imprint driven by Appeal elucidates opportunities to coordinate future efforts to fill the shortfalls of biodiversity knowledge more efficiently for the Neotropical fish fauna.
Keywords	Neotropics ; biodiversity ; fauna ; freshwater fish ; habitats ; inventories ; tropical fish ; Biodiversity knowledge shortfalls ; Amazon ; Colombia ; La Plata ; Inventory completeness ; Inventory effort ; Sampling
Language	English
Dates of publication	2023-08
Publishing place	Elsevier Ltd
Document type	Article ; Online
ISSN	0006-3207
DOI	10.1016/j.biocon.2023.110186
Database	NAL-Catalogue (AGRICOLA)

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Article: Contemporary environment and historical legacy explain functional diversity of freshwater fishes in the world rivers

Su, Guohuan / Tedesco, Pablo A. / Toussaint, Aurèle / Villéger, Sébastien / Brosse, Sébastien

Global ecology and biogeography. 2022 Apr., v. 31, no. 4

2022

Abstract: AIM: Regional taxonomic diversity (species richness) is strongly influenced by a joint effect of the current processes (habitat and energy availability) and historical legacies (past climate and geography), but it is still unclear how those historical ... ...

Abstract	AIM: Regional taxonomic diversity (species richness) is strongly influenced by a joint effect of the current processes (habitat and energy availability) and historical legacies (past climate and geography), but it is still unclear how those historical and current environmental drivers have shaped the functional diversity of species assemblages. MAJOR TAXA STUDIED: Freshwater fish. LOCATION: Global. TIME PERIOD: 1960s–2000s. METHODS: We combined the spatial occurrences over 2,400 river basins world‐wide and the functional traits measured on 10,682 freshwater fish species to quantify the relative role of the habitat, climate and historical processes on the current global fish functional diversity. To avoid any correlation between taxonomic diversity and functional diversity, we controlled for differences in the number of species (species richness) between rivers. Functional diversity was considered through three complementary facets: functional richness, functional dispersion and functional identity. RESULTS: The habitat‐related variables explained most of the gradient in functional richness, verifying the habitat size–diversity hypothesis. In contrast, the historical climate–geography legacies markedly imprinted the functional dispersion and functional identity patterns, leading to a balanced influence of the current and historical processes. Indeed, the distribution of morphological traits related to fish dispersal was explained largely by the glaciation events during the Quaternary, leading to strong latitudinal gradients. MAIN CONCLUSIONS: This study provides new insights into the role of historical and current environmental determinants on the functional structure of fish assemblages and strengthens the proposal that the independence of facets of functional diversity from the species richness makes them essential biodiversity variables to understand the structure of communities and their responses to global changes.
Keywords	biogeography ; climate ; energy ; freshwater ; freshwater fish ; functional diversity ; glaciation ; habitats ; rivers ; species richness
Language	English
Dates of publication	2022-04
Size	p. 700-713.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	2021283-5
ISSN	1466-8238 ; 1466-822X ; 0960-7447
ISSN (online)	1466-8238
ISSN	1466-822X ; 0960-7447
DOI	10.1111/geb.13455
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Article: Taxonomic rarity and functional originality of freshwater fishes and their responses to anthropogenic habitat alterations

Tóth, Rita / Czeglédi, István / Takács, Péter / Tedesco, Pablo A. / Erős, Tibor

Aquatic conservation. 2022 Mar., v. 32, no. 3

2022

Abstract: The human alteration of habitats is a major driver in the decline of biodiversity worldwide. However, the relationships between different forms of rarity, including both taxonomic and functional aspects, are poorly known. Two relationships were examined ... ...

Abstract	The human alteration of habitats is a major driver in the decline of biodiversity worldwide. However, the relationships between different forms of rarity, including both taxonomic and functional aspects, are poorly known. Two relationships were examined in this study: (i) between the different forms of taxonomic rarity and functional originality of lotic fishes; and (ii) between rarity indices and the degree of human alterations. Stream fish communities at 429 stream and river sites were sampled between 2013 and 2018. The taxonomic rarity of fishes was characterized based on their local rarity, habitat specificity and geographical restrictedness. The functional originality of each species was also quantified by using ecomorphological traits, and the relationships between the different indices and their responses to human habitat degradation were explored. Only weak or medium level correlations were found among the indices of taxonomic rarity. A combined taxonomic rarity index showed that overall taxonomic rarity was determined most strongly by local rarity, followed by habitat specificity, and finally, geographical restrictedness. Functional originality was not related either to individual rarity indices or the combined taxonomic rarity index. Mean taxonomic rarity of species was correlated with the degree of habitat degradation of the sites. Contrary to taxonomic rarity, mean functional originality of species increased with the degree of human alteration. This study shows that a more exact characterization of species rarity requires multiple metrics, including functional ones, because these indices respond differently to human alterations. Combined indices of rarity can help to prioritize species level conservation actions, although single rarity metrics are still needed to adapt these actions to species attributes (e.g. endemism or unique functions). Species level conservation would benefit from including the evaluation of functional rarity into conservation policy.
Keywords	biodiversity ; freshwater ; habitat destruction ; habitats ; humans ; indigenous species ; issues and policy ; lotic systems ; rivers ; streams
Language	English
Dates of publication	2022-03
Size	p. 484-494.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	1146285-1
ISSN	1052-7613
ISSN	1052-7613
DOI	10.1002/aqc.3768
Database	NAL-Catalogue (AGRICOLA)

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Article: Geomorphological diversity of rivers in the Amazon Basin

Jézéquel, Céline / Oberdorff, Thierry / Tedesco, Pablo A. / Schmitt, Laurent

Geomorphology. 2022 Mar. 01, v. 400

2022

Abstract: The regional extent and transboundary nature of the world largest rivers accentuate the difficulty to characterize river forms and processes at a whole basin scale. We developed a framework to define a river classification protocol adapted to large ... ...

Abstract	The regional extent and transboundary nature of the world largest rivers accentuate the difficulty to characterize river forms and processes at a whole basin scale. We developed a framework to define a river classification protocol adapted to large rivers and further applied this protocol to elaborate a geomorphological classification of Amazonian rivers using two interlocked hierarchical spatial scales: the landscape unit at the basin scale and the reach unit at the local scale. Our framework relies on open-source geospatial data, reproducible and automatic methods to extract the geomorphological attributes of the river network, and on statistical modelling. We followed five main steps to develop our geomorphological classification of Amazonian rivers: (1) the identification of the basin landscape units (LUs) using a set of physical, topographic, and climatic variables; (2) the delineation of the active channel and floodplain surfaces along the river basin longitudinal continuum using satellite image-based data; (3) the sub-division of the entire river network into elementary river reach units displaying uniform conditions; (4) the selection, at the reach scale, of a set of geomorphic variables adapted to large rivers; (5) the elaboration of the Amazonian rivers classification by statistically grouping the reach units into ‘homogenous’ river types. Finally, we described the spatial patterns of river types within the basin, and illustrate the multi-scale flexibility and robustness of the approach focusing on the multi-threaded Negro River, a main tributary of the Amazon mainstem.
Keywords	basins ; floodplains ; landscapes ; rivers ; satellites ; spatial data ; topography ; watersheds
Language	English
Dates of publication	2022-0301
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	58028-4
ISSN	0169-555X
ISSN	0169-555X
DOI	10.1016/j.geomorph.2021.108078
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Article ; Online: Major shifts in biogeographic regions of freshwater fishes as evidence of the Anthropocene epoch.

Leroy, Boris / Bellard, Céline / Dias, Murilo S / Hugueny, Bernard / Jézéquel, Céline / Leprieur, Fabien / Oberdorff, Thierry / Robuchon, Marine / Tedesco, Pablo A

Science advances

2023 Volume 9, Issue 46, Page(s) eadi5502

Abstract: Animals and plants worldwide are structured in global biogeographic regions, which were shaped by major geologic forces during Earth history. Recently, humans have changed the course of events by multiplying global pathways of introduction for ... ...

Abstract	Animals and plants worldwide are structured in global biogeographic regions, which were shaped by major geologic forces during Earth history. Recently, humans have changed the course of events by multiplying global pathways of introduction for nonindigenous species and propagating local species extirpations. Here, we report on how introductions and extirpations have changed the distributions of freshwater fishes worldwide and how it affected their natural biogeographic regions. We found major shifts in natural regions, with the emergence of an intercontinental region arising from the fusion of multiple faunas, which we named Pan-Anthropocenian Global North and East Asia (PAGNEA). The PAGNEA region is evocative of the Pangea supercontinent, as flows of introductions show that dispersal has become possible again across multiple continents, suggesting that human activities have superseded natural geological forces. Our results constitute evidence on the expected modification of biostratigraphic boundaries based on freshwater fish, which are abundant in the fossil record, thereby supporting the concept of the Anthropocene epoch.
MeSH term(s)	Animals ; Humans ; Fresh Water ; Fishes ; Asia, Eastern ; Fossils ; Geology ; Phylogeny
Language	English
Publishing date	2023-11-17
Publishing country	United States
Document type	Journal Article
ZDB-ID	2810933-8
ISSN	2375-2548 ; 2375-2548
ISSN (online)	2375-2548
ISSN	2375-2548
DOI	10.1126/sciadv.adi5502
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Article ; Online: Global freshwater fish invasion linked to the presence of closely related species.

Xu, Meng / Li, Shao-Peng / Liu, Chunlong / Tedesco, Pablo A / Dick, Jaimie T A / Fang, Miao / Wei, Hui / Yu, Fandong / Shu, Lu / Wang, Xuejie / Gu, Dangen / Mu, Xidong

Nature communications

2024 Volume 15, Issue 1, Page(s) 1411

Abstract: In the Anthropocene, non-native freshwater fish introductions and translocations have occurred extensively worldwide. However, their global distribution patterns and the factors influencing their establishment remain poorly understood. We analyze a ... ...

Abstract	In the Anthropocene, non-native freshwater fish introductions and translocations have occurred extensively worldwide. However, their global distribution patterns and the factors influencing their establishment remain poorly understood. We analyze a comprehensive database of 14953 freshwater fish species across 3119 river basins and identify global hotspots for exotic and translocated non-native fishes. We show that both types of non-native fishes are more likely to occur when closely related to native fishes. This finding is consistent across measures of phylogenetic relatedness, biogeographical realms, and highly invaded countries, even after accounting for the influence of native diversity. This contradicts Darwin's naturalization hypothesis, suggesting that the presence of close relatives more often signifies suitable habitats than intensified competition, predicting the establishment of non-native fish species. Our study provides a comprehensive assessment of global non-native freshwater fish patterns and their phylogenetic correlates, laying the groundwork for understanding and predicting future fish invasions in freshwater ecosystems.
MeSH term(s)	Animals ; Ecosystem ; Phylogeny ; Fresh Water ; Rivers ; Fishes ; Introduced Species ; Biodiversity
Language	English
Publishing date	2024-02-15
Publishing country	England
Document type	Journal Article
ZDB-ID	2553671-0
ISSN	2041-1723 ; 2041-1723
ISSN (online)	2041-1723
ISSN	2041-1723
DOI	10.1038/s41467-024-45736-8
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Article: Evolutionary and environmental drivers of species richness in poeciliid fishes across the Americas

García‐Andrade, Ana Berenice / Carvajal‐Quintero, Juan David / Tedesco, Pablo A / Villalobos, Fabricio

Global ecology and biogeography. 2021 June, v. 30, no. 6

2021

Abstract: AIM: Geographical gradients of vertebrate species richness are determined jointly by evolutionary and environmental factors. Support for these factors comes mostly from tetrapods and, recently, marine fishes, but their validity and relative importance in ...

Abstract	AIM: Geographical gradients of vertebrate species richness are determined jointly by evolutionary and environmental factors. Support for these factors comes mostly from tetrapods and, recently, marine fishes, but their validity and relative importance in freshwater fishes is not well understood. Here, we describe the species richness gradient for the major component of the viviparous freshwater fishes of the Americas, the poeciliids, and test the effects of evolutionary and environmental factors on this pattern. LOCATION: The Americas. TIME PERIOD: Approximatley 56–0 Ma. MAJOR TAXA STUDIED: Poeciliidae (Teleostei: Cyprinodontiformes). METHODS: We constructed geographical ranges for 93% (256) of poeciliids to describe and evaluate their species richness gradient. Evolutionary factors (evolutionary time and speciation rate) were derived from a recent phylogeny. Environmental factors were represented as basin area, topographical heterogeneity, energy, climate seasonality and past climatic stability. We tested the influence of these factors with a piecewise structural equation model (pSEM). RESULTS: The distribution of Poeciliidae is biased to the Atlantic coast, with species richness showing a bimodal latitudinal gradient, peaking in middle latitudes near the Tropics of Cancer and Capricorn, and exhibiting the highest richness in Middle America. The pSEM showed that this species richness pattern was influenced positively by evolutionary time and past climatic stability and negatively by climate seasonality. MAIN CONCLUSION: The species richness gradient of Poeciliidae has been shaped by the interplay of evolutionary time in addition to current and historical climate. Indeed, regions with high poeciliid richness were those containing by ancient lineages, supporting the time‐for‐speciation effect, and that have experienced low historical stability in temperature and currently show low temperature seasonality. Conversely, species‐poor regions contained younger lineages and experienced greater temperature seasonality. Our study highlights the need to assess jointly the evolutionary, historical and climatic drivers of species richness in order to unravel the causes of diversity gradients.
Keywords	Poeciliidae ; basins ; biogeography ; coasts ; energy ; freshwater ; phylogeny ; species richness ; structural equation modeling ; temperature
Language	English
Dates of publication	2021-06
Size	p. 1245-1257.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	NAL-AP-2-clean ; JOURNAL ARTICLE
ZDB-ID	2021283-5
ISSN	1466-8238 ; 1466-822X ; 0960-7447
ISSN (online)	1466-8238
ISSN	1466-822X ; 0960-7447
DOI	10.1111/geb.13299
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Article ; Online: Climate and land-use changes interact to drive long-term reorganization of riverine fish communities globally.

Comte, Lise / Olden, Julian D / Tedesco, Pablo A / Ruhi, Albert / Giam, Xingli

Proceedings of the National Academy of Sciences of the United States of America

2021 Volume 118, Issue 27

Abstract: As climate change unfolds, changes in population dynamics and species distribution ranges are expected to fundamentally reshuffle communities worldwide. Yet, a comprehensive understanding of the mechanisms and extent of community reorganization remains ... ...

Abstract	As climate change unfolds, changes in population dynamics and species distribution ranges are expected to fundamentally reshuffle communities worldwide. Yet, a comprehensive understanding of the mechanisms and extent of community reorganization remains elusive. This is particularly true in riverine systems, which are simultaneously exposed to changing temperature and streamflow, and where land-use change continues to be a major driver of biodiversity loss. Here, we use the most comprehensive compilation of fish abundance time series to date to provide a global synthesis of climate- and LU-induced effects on riverine biota with respect to changes in species thermal and streamflow affinities. We demonstrate that fish communities are increasingly dominated by thermophilic (warm-water) and limnophilic (slow-water) species. Despite being consistent with trends in water temperature and streamflow observed over recent decades, these community changes appear largely decoupled from each other and show wide spatial variation. We further reveal a synergy among climate- and land use-related drivers, such that community thermophilization is heightened in more human-modified systems. Importantly, communities in which species experience thermal and flow regimes that approach or exceed their tolerance thresholds (high community sensitivity), as well as species-poor communities (low community resilience), also display faster rates of compositional change. This research illustrates that quantifying vulnerability of riverine systems to climate change requires a broadening from a narrower thermal focus to more integrative approaches that account for the spatially varying and multifaceted sensitivity of riverine organisms to the interactive effects of water temperature, hydrology, and other anthropogenic changes.
MeSH term(s)	Animals ; Climate Change ; Fishes/physiology ; Geography ; Internationality ; Models, Theoretical ; Rivers ; Temperature ; Time Factors ; Water Movements
Language	English
Publishing date	2021-06-21
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
ZDB-ID	209104-5
ISSN	1091-6490 ; 0027-8424
ISSN (online)	1091-6490
ISSN	0027-8424
DOI	10.1073/pnas.2011639118
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