Environmental influences on the distribution of arapaima in Amazon floodplains

Arantes, Caroline C.; Castello, Leandro; Cetra, Maurício; Schilling, Ana Cristina

doi:10.1007/s10641-011-9917-9

Cited by 60 publications

(69 citation statements)

References 34 publications

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“…Taxonomic and functional assemblage structures also were associated with gradients defined by local environmental variables, a finding consistent with other studies showing that a hierarchical network of interacting factors and processes, rather than just a single mechanism, influences fish assemblages in floodplain ecosystems (Freitas, Siqueira‐Souza, Florentino, & Hurd, ; Kouamé et al., ; Tejerina‐Garro, Fortin, & Rodriguez, ). Water transparency, depth and dissolved oxygen have been shown to be significant determinants of fish assemblage structure in other Neotropical river floodplains (Arantes, Castello, Cetra, & Schilling, ; Petry, Bayley, & Markle, ; Rodriguez & Lewis, ; Tejerina‐Garro et al., ). Deeper aquatic habitats in the floodplain may support greater fish abundance because they are more stable during periods of extreme low water (Arantes et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…Water transparency, depth and dissolved oxygen have been shown to be significant determinants of fish assemblage structure in other Neotropical river floodplains (Arantes, Castello, Cetra, & Schilling, ; Petry, Bayley, & Markle, ; Rodriguez & Lewis, ; Tejerina‐Garro et al., ). Deeper aquatic habitats in the floodplain may support greater fish abundance because they are more stable during periods of extreme low water (Arantes et al., ). Several groups of diurnal fishes that rely strongly on vision (e.g.…”

Section: Discussionmentioning

confidence: 99%

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Relationships between forest cover and fish diversity in the Amazon River floodplain

Arantes

Winemiller

Petrere

et al. 2017

Journal of Applied Ecology

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129

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Habitat degradation leads to biodiversity loss and concomitant changes in ecosystem processes. Tropical river floodplains are highly threatened by land cover changes and support high biodiversity and important ecosystem services, but the extent to which changes in floodplain land cover affect fish biodiversity remains unknown. We combined fish and environmental data collected in situ and satellite‐mapped landscape features to evaluate how fish species with different ecological strategies and assemblage structures respond to deforestation in floodplains of the Amazon River. We surveyed 462 floodplain habitats distributed along a gradient of land cover, from largely forested to severely deforested. Rather than analyse only taxonomic metrics, we employed an integrative approach that simultaneously considers different aspects of fish biodiversity (i.e. β diversity and taxonomic and functional assemblage structure) to facilitate mechanistic interpretations of the influence of land cover. Spatial patterns of fish biodiversity in the Amazon River floodplain were strongly associated with forest cover as well as local environmental conditions linked to landscape gradients. Several species and functional groups defined by life‐history, feeding, swimming/microhabitat‐use strategies were positively associated with forest cover. Other species, including some that would usually be considered habitat generalists and species directly dependent on autochthonous resources (e.g. planktivores), were most common in areas dominated by herbaceous vegetation or open water habitats associated with the opposite extreme of the forest cover gradient. β diversity and the degree of uniqueness of species combinations within habitats were also positively associated with forest cover. Synthesis and applications. Our results demonstrating that spatial patterns of fish biodiversity are associated with forest cover, indicate that deforestation of floodplains of the Amazon River results in spatial homogenization of fish assemblages and reduced functional diversity at both local and regional scales. Floodplains world‐wide have undergone major land cover changes, with forest loss projected to increase during the next decades. Conserving fish diversity in these ecosystems requires protecting mosaics of both aquatic habitats and floodplain vegetation, with sufficient forest cover being critically important.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Relationships between forest cover and fish diversity in the Amazon River floodplain

Arantes

Winemiller

Petrere

et al. 2017

Journal of Applied Ecology

Self Cite

129

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“…Fish migrate laterally onto the floodplains during rising river waters to avoid predators and feed on nutritious plant materials (Welcomme, 1985;Gomes & Agostinho, 1997;Castello, 2008a,b). Conversely, declining waters force fish to migrate back to river channels and lakes, where water quality is generally poor and fish are more vulnerable to predation (Welcomme, 1985;De M erona & Gascuel, 1993;Arantes et al, 2013). These lateral migrations are performed by resident floodplain species (e.g., Cichla spp.…”

Section: Ecosystem Servicesmentioning

confidence: 99%

Large‐scale degradation of Amazonian freshwater ecosystems

Castello

Macedo

2015

Global Change Biology

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391

275

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Hydrological connectivity regulates the structure and function of Amazonian freshwater ecosystems and the provisioning of services that sustain local populations. This connectivity is increasingly being disrupted by the construction of dams, mining, land-cover changes, and global climate change. This review analyzes these drivers of degradation, evaluates their impacts on hydrological connectivity, and identifies policy deficiencies that hinder freshwater ecosystem protection. There are 154 large hydroelectric dams in operation today, and 21 dams under construction. The current trajectory of dam construction will leave only three free-flowing tributaries in the next few decades if all 277 planned dams are completed. Land-cover changes driven by mining, dam and road construction, agriculture and cattle ranching have already affected ~20% of the Basin and up to ~50% of riparian forests in some regions. Global climate change will likely exacerbate these impacts by creating warmer and dryer conditions, with less predictable rainfall and more extreme events (e.g., droughts and floods). The resulting hydrological alterations are rapidly degrading freshwater ecosystems, both independently and via complex feedbacks and synergistic interactions. The ecosystem impacts include biodiversity loss, warmer stream temperatures, stronger and more frequent floodplain fires, and changes to biogeochemical cycles, transport of organic and inorganic materials, and freshwater community structure and function. The impacts also include reductions in water quality, fish yields, and availability of water for navigation, power generation, and human use. This degradation of Amazonian freshwater ecosystems cannot be curbed presently because existing policies are inconsistent across the Basin, ignore cumulative effects, and overlook the hydrological connectivity of freshwater ecosystems. Maintaining the integrity of these freshwater ecosystems requires a basinwide research and policy framework to understand and manage hydrological connectivity across multiple spatial scales and jurisdictional boundaries.

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“…A delimitação depende do histórico de ocupação e dos acordos estabelecidos entre usuários. A categorização depende de critérios científicos, que são três: profundidade do lago, extensão do lago e a conectividade entre os corpos de água, que permitirá a movimentação dos peixes entre diferentes ambientes e a consequente densidade populacional de peixes nos lagos (Arantes et al 2011). Do ponto de vista dos pescadores, zonear é estabelecer quais lagos serão liberados para a pesca e quais não serão.…”

Section: Manejo Na Nossa Reservaunclassified

“Nossa Reserva”: Redes E Interações Entre Peixes E Pescadores No Médio Rio Solimões

2015

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ResumoNeste artigo, argumentamos que a criação de sistemas de manejo de pesca na região do médio Solimões repercutiu em mudanças nos modos como os pescadores lidam com os ambientes de lagos e, também, nos peixes que habitam a várzea, especialmente o pirarucu (Arapaima gigas). Essa mudança não é pontual, mas faz parte de um longo processo histórico regional de exploração do pescado nos lagos de várzea. As tecnologias empregadas na captura de peixes variam historicamente, de acordo com a escala e finalidade da pesca -para subsistência ou comércio. A partir de uma abordagem etnográfica, pretendemos explicitar mudanças engendradas pelo manejo de pirarucu na escolha dos pescadores pelo uso de redes (malhadeiras). Pretendemos com isso entender como a guarda dos lagos e a operacionalização do manejo de pirarucu influenciaram em transformações nos processos técnicos envolvendo pescadores e pirarucus nesta região.Palavras-chave: Pesca, técnica, manejo "OUR RESERVE": NETWORKS AND INTERACTIONS AMONG FISH AND FISHERMEN IN THE MIDDLE SOLIMÕES RIVER AbstractIn this paper we argue that systems of fishery management in the médio Solimões region changed the ways fishermen relate to both the lake's environment and the fishes that live in the várzea (Amazon floodplains), specially the pirarucu (Arapaima gigas). This change is not fortuitous, but part of a long term historical process of exploitation of fish from várzea lakes. The technologies employed in fish capture has varied historically, according to the scale and aim -subsistence or commerce. Based on an ethnographic approach we seek to explain technical changes caused by the pirarucu sustainable management practices, specially the adoption of fishing nets. We seek to understand how the protection of lakes and fishing management influenced the transformation of technical processes involving fishermen and pirarucu. "NOTRE RESERVE": LES RESEAUX ET LES INTERACTIONS EN-TRE LES POISSONS ET LES PECHEURS DANS LE MÉDIO RIO SOLIMÕES RésuméDans cet article nous montrons comment la mise en place de systè--mes de gestion collective des ressources halieutiques dans la région du médio Solimões a modifié les rapport des pêcheurs à l'environnement lacustre et aux poissons de la várzea, en particulier le pirarucu(Arapaima gigas). Cette évolution s'inscrit à long terme dans l'histoire régionale de la pêche et de l'exploitation des lacs. Les techniques employées durant la capture des poissons varient historiquement, selon l'échelle et la fi--nalité de la pêche -de subsistance ou commerciale. À partir d'une étu--de ethnographique, nous analysons les modifications engendrées par la gestion collective du pirarucudans les choix techniques des pêcheurs et en particulier la préférence pour l'usage des filets. Nous prétendons ainsi comprendre comment la protection des lacs et la mise en oeuvre opérationnelle de la gestion du pirarucu ont influencé l'évolution des procédés techniques qui relient pêcheurs et pirarucu.

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Environmental influences on the distribution of arapaima in Amazon floodplains

Cited by 60 publications

References 34 publications

Relationships between forest cover and fish diversity in the Amazon River floodplain

Relationships between forest cover and fish diversity in the Amazon River floodplain

Large‐scale degradation of Amazonian freshwater ecosystems

“Nossa Reserva”: Redes E Interações Entre Peixes E Pescadores No Médio Rio Solimões

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