An explicit GIS-based river basin framework for aquatic ecosystem conservation in the Amazon

Venticinque, Eduardo Martins; Forsberg, Bruce R.; Barthem, Ronaldo Borges; Petry, Paulo; Hess, Laura L.; Mercado, Armando; Cañas, Carlos; Montoya, Mariana; Durigan, Carlos César; Goulding, Michael

doi:10.5194/essd-8-651-2016

Cited by 84 publications

(94 citation statements)

References 18 publications

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“…We developed a new classified river drainage network and scalable river basin hierarchy for the Amazon in order to map commercial fish catches, major river types, fish migrations, wetlands and other biological and limnological phenomena (Venticinque et al., ) (The complete database is available here: https://knb.ecoinformatics.org/#view/doi:10.5063/F1BG2KX8). In contrast to the Pfafstetter river basin typology (e.g., Elesbon, Guedes, Amaral, Ribeiro, & Silva, ) commonly used by Amazon water authorities, our classification recognizes ecologically coherent spatial units referred to as mainstem basins, which include the main channels of major rivers, their associated floodplains and small tributaries that flow directly into these floodplains (Figure ).…”

Section: Methodsmentioning

confidence: 99%

“…For regional statistical analyses, we mapped fishery and wetland data to Basin Level 4 sub‐basins (Figure ). A first classification of river types (whitewater, blackwater and clearwater) in the Amazon for 6th–11th order tributaries of the Amazon was based on our own field data, the literature and qualitative visual analysis of high‐resolution imagery (Venticinque et al., ).…”

Section: Methodsmentioning

confidence: 99%

Section: Spatial Context For the Ecosystem-based Management Of Migrmentioning

confidence: 99%

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Ecosystem‐based management of Amazon fisheries and wetlands

et al. 2018

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Infrastructure development and overfishing in the Amazon make it imperative to define adequate scales for the ecosystem‐based management of commercial fisheries and the wetlands on which they depend. We mapped fisheries and fish ecology data from Brazil, Peru, Bolivia and Colombia to an explicit GIS framework of river basins and mainstems. Migratory species account for more than 80% of the known maximum catches of commercial fisheries across the Amazon. Of these migratory species, we nominated six long‐distance migratory fish taxa as flagship species to define the two main commercial fishery regions. The migrations of at least one goliath catfish species define a large‐scale longitudinal link joining the Andes, Amazon Lowlands and Amazon River estuary. Migratory Characiforms demonstrate interbasin wetland connectivity between nutrient‐rich and nutrient‐poor rivers over at least 2 million km2, or about one‐third of the Amazon Basin. We show that flooded forest area is the most important wetland variable explaining regional variations in migratory characiforme biomass as indicated by maximum annual fishery catches. The sustainable management of Amazon fisheries will require transnational cooperation and a paradigm shift from local community management alone to a more integrated approach that considers both rural and urban consumers and challenges, and the realistic life histories of migratory species.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Ecosystem‐based management of Amazon fisheries and wetlands

et al. 2018

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“…A total of 25 BL2 catchments, listed in Section 3.1 below, have been used in this study. The Amazon Basin catchment system used in this study was developed by Venticinque et al [26]. Basins of level 2 (BL2) depicted in Figure 2 below are defined as, "Delimiting tributary basins larger than 100,000 km 2 whose main stems flow into the Amazon River main channel, as well as main stem polygons that consists of the open waters of the Amazon River, its floodplain and adjacent small tributary basins" [26].…”

Section: River Basin Framework and Gauge Datamentioning

confidence: 99%

Mapping of Maximum and Minimum Inundation Extents in the Amazon Basin 2014–2017 with ALOS-2 PALSAR-2 ScanSAR Time-Series Data

Rosenqvist

Rosenqvist²,

Jensen

et al. 2020

Remote Sensing

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Seasonal inundation is an important effect that governs the distribution of ecosystems in the tropics. In the Amazon Basin, the seasonal flood pulse causes a difference in high and low water levels that can exceed 15 m. The associated flood duration and extent play an important role in land-atmosphere carbon exchange and affect the ecosystem's carbon pool that originates from organic matter transported from upland and flooded forests. Studies of wetlands inundation across the Amazon Basin have utilized dual season mosaics from JERS-1 and wide-swath ScanSAR data from ALOS PALSAR to characterize inundation across the basin. This study builds upon past efforts with JERS-1 and ALOS PALSAR and uses ALOS-2 PALSAR-2 ScanSAR data to generate annual maximum and minimum inundation extent maps over the full Amazon Basin for the period spanning November 2014-October 2017. The study uses decision tree classification to create a maximum and a minimum inundation extent map for each year over this time period. The results show that a generalized algorithm that fits the entire basin has an 86% overall accuracy compared with a classification made for a local region from the same PALSAR-2 datasets. Comparisons with previous full-basin inundation maps by other L-band radars shows similar results for inundated areas during maximum inundation. The maps derived previously from JERS-1 and ALOS PALSAR show 7.3% and 6.9% inundated vegetation, respectively, and this study using PALSAR-2 shows values ranging between 5.5% and 7.0% across the three study years. Comparisons between the stage data across the basin and acquisition dates/periods for JERS-1 and PALSAR-2 show that the sensors capture the nature of the maximum and minimum flooding across the basins but have not successfully captured the exact maximum and minimum flood levels that have been recorded in the stage data. The inundation maps are publicly available under a Creative Commons (CC BY 4.0) license Abstract: Seasonal inundation is the tropics. In the Amazon Basin levels that can exceed 15 m. The a atmosphere carbon exchange an matter transported from upland Amazon Basin have utilized dua ALOS PALSAR to characterize in JERS-1 and ALOS PALSAR an maximum and minimum inun spanning November 2014-Octo maximum and a minimum inun show that a generalized algorith with a classification made for a previous full-basin inundation m areas during maximum inundat show 7.3% and 6.9% inundated values ranging between 5.5% and data across the basin and acquisi capture the nature of the max successfully captured the exact m stage data. The inundation map license from the Alaska Satell Keywords: SAR; inundation; de from the Alaska Satellite Facility.

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“…As delimited by Alfred Russel Wallace (1853), Amazon's freshwater habitats can be categorized into black, white and blue waters (= clear; Sioli, 1984;Venticinque et al, 2016). Wallace apparently also considered the importance of such environments in the formation of new species of fish.…”

Section: Introductionmentioning

confidence: 99%

Testing Wallace's intuition: water type, reproductive isolation and divergence in an Amazonian fish

Pires

Borghezan

Machado

et al. 2018

J of Evolutionary Biology

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Alfred Russel Wallace proposed classifying Amazon rivers based on their colour and clarity: white, black and clear water. Wallace also proposed that black waters could mediate diversification and yield distinct fish species. Here, we bring evidence of speciation mediated by water type in the sailfin tetra (Crenuchus spilurus), a fish whose range encompasses rivers of very distinct hydrochemical conditions. Distribution of the two main lineages concords with Wallace's water types: one restricted to the acidic and nutrient-poor waters of the Negro River (herein Rio Negro lineage) and a second widespread throughout the remaining of the species' distribution (herein Amazonas lineage). These lineages occur over a very broad geographical range, suggesting that despite occurring in regions separated by thousands of kilometres, individuals of the distinct lineages fail to occupy each other's habitats, hundreds of metres apart and not separated by physical barrier. Reproductive isolation was assessed in isolated pairs exposed to black-water conditions. All pairs with at least one individual of the lineage not native to black waters showed significantly lower spawning success, suggesting that the water type affected the fitness and contributed to reproductive isolation. Our results endorse Wallace's intuition and highlight the importance of ecological factors in shaping diversity of the Amazon fish fauna.

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An explicit GIS-based river basin framework for aquatic ecosystem conservation in the Amazon

Cited by 84 publications

References 18 publications

Ecosystem‐based management of Amazon fisheries and wetlands

Ecosystem‐based management of Amazon fisheries and wetlands

Mapping of Maximum and Minimum Inundation Extents in the Amazon Basin 2014–2017 with ALOS-2 PALSAR-2 ScanSAR Time-Series Data

Testing Wallace's intuition: water type, reproductive isolation and divergence in an Amazonian fish

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