Quantitative analysis of foraging habitat use by ciconiiformes in the upper Paraná river Floodplain, Brazil

Gimenes, Márcio Rodrigo; Anjos, Luiz dos

doi:10.1590/s1516-89132011000200025

Cited by 13 publications

(17 citation statements)

References 34 publications

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Section: Discussionsupporting

confidence: 80%

“…Both species were not selective regarding dry or flooded substrates, as also observed by other study (Gimenes and Anjos, 2011). However, these species are strongly biased toward flooded habitats (Motta-Junior, 2008;Carvalho, 2010;Gimenes and Anjos, 2011). It should be pointed out that in many studies on habitat use by egrets, little or no importance was given to analysing the use of the microhabitat (Moreno et al, 2004).…”

Section: Discussionsupporting

confidence: 67%

See 1 more Smart Citation

Microhabitat use by three species of egret (Pelecaniformes, Ardeidae) in southern Brazil

Dp¹,

Cc²,

Fb³

et al. 2013

Braz. J. Biol.

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In the present study, we examined the role of different habitat components and their relationship with microhabitat use by three species of egret: Cocoi heron (Ardea cocoi), Great egret (Ardea alba), and Cattle egret (Bubulcus ibis), in wetlands of southern Brazil. Ardea alba and A. cocoi were not habitat-specific (e.g. vegetation cover and flooding level). Conversely, B. ibis was associated with drier microhabitats. Relative air humidity and air temperature were the main variables which correlated with the occurrence of these species and supported the plasticity of B. ibis and its predominance in drier habitats.Keywords: Aquatic birds, marsh, habitat, Taim. Uso de micro-habitat por três espécies de garça (Pelecaniformes, Ardeidae) no sul do Brasil ResumoNo presente estudo foi avaliado o papel de diferentes componentes do habitat e sua relação quanto ao uso do microambiente por três espécies de Ardeidae: garça-moura (Ardea cocoi), garça-branca-grande (Ardea alba) e garça-vaqueira (Bubulcus ibis), em banhados do extremo sul brasileiro. Aparentemente, A. alba e A. cocoi não apresentaram especificidade a algum tipo de habitat (e.g. cobertura vegetal e nível de alagamento). Por outro lado B. ibis revelou associações a microambientes mais secos. A temperatura do ar e umidade relativa do ar foram as principais variáveis correlacionadas com a ocorrência dessas espécies, além disso, reforçou-se a plasticidade de B. ibis e sua predominância em ambientes secos.

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Section: Discussionsupporting

confidence: 80%

Section: Discussionsupporting

confidence: 67%

Microhabitat use by three species of egret (Pelecaniformes, Ardeidae) in southern Brazil

Dp¹,

Cc²,

Fb³

et al. 2013

Braz. J. Biol.

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“…Obtaining food resources in floodplain wetlands can be difficult, despite the high productivity of these ecosystems, because the frequency and magnitude of water‐level fluctuations may severely constrain the ability of species, including waterbirds, to survive in these environments (Kushlan, ). During periods when environmental conditions of floodplains hinder the acquisition of required resources, species may move in search of better conditions either along the river system or into surrounding uplands (Antas, ; Gimenes & dos Anjos, ). Availability of feeding habitats may be a particularly good predictor of waterbird responses to hydrological fluctuations because waterbirds are likely to respond quickly to changes in availability of foraging sites as water levels change (Weller, ).…”

Section: Discussionmentioning

confidence: 99%

“…Thus, among the different mechanistic pathways that contribute to hydrologically driven variation in local distribution patterns of waterbirds, habitat‐mediated effects may be important because of the variation in habitat produced by fluctuations in water levels. Accordingly, studies that have assessed waterbird responses to hydrological fluctuations in wetlands have frequently explained those responses in terms of water‐level effects on the availability of feeding habitats (Cumming et al, ; Gimenes & dos Anjos, ; Royan et al, ). Here, we show that responses of waterbirds to hydrological fluctuations of the Middle Paraná River can be explained by the influence of water level on floodplain habitats, although this relationship may vary as a function of the different habitat requirements of the waterbird species.…”

Section: Discussionmentioning

confidence: 99%

Habitat‐mediated influence of water‐level fluctuations on waterbird occurrence in floodplain wetlands of the Parana River, Argentina

Lorenzón

Beltzer

Peltzer

et al. 2017

River Research & Apps

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Responses of waterbirds to habitat variation could account for their responses to fluctuations in river levels because hydrological fluctuations influence habitat availability across floodplains.Relationships between water level and waterbird occurrence were examined in floodplain wetlands of the Middle Paraná River to assess (a) whether occurrences of waterbird species were associated with water-level fluctuations of the river, (b) which habitats were associated with species that showed a relationship with water level, (c) the influence of water level on these habitats, and (d) whether influence of water level on these species was related to water-level influence on habitats. Through the use of regressions and structural equation models, we assessed whether direct relationships between each species and water level remained important after considering the influence of habitat variation. Of 21 species analysed, occurrences of 12 species showed an association with water-level fluctuations. Indirect effects of water level through habitats fully accounted for this association in 5 species. Variation in habitat conditions did not, however, fully account for responses of 6 species, suggesting that although habitat variation can be an important factor, other variables are necessary to explain responses of some species to water level. One species was not associated with any habitat and therefore was not included in this analysis. Our results agreed with the idea that an important fraction of waterbird responses to hydrological fluctuations is related to the effects of these fluctuations on the availability of habitats across the floodplain. Our results provide data that help delimit groups of waterbird species that respond in similar ways to hydrological fluctuations.

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“…Both indices were significantly lower in February 2002 than in most other months. Connected lagoons have permanent surface contact with rivers and influx of prey for the Pelecaniformes and Ciconiiformes, and have been previously identified as patches of better quality for wading birds due to greater abundance of fish (Gimenes & Anjos ). February 2002 was the first flooded month following a dry year (2001), and the higher water level may have decreased prey accessibility (Gawlik ), negatively influencing the capacity of waterbirds to capture prey, and thus decreasing the quality of the habitat for wading birds, driving low functional diversity (Figs and ).…”

Section: Discussionmentioning

confidence: 99%

Wading bird functional diversity in a floodplain: Influence of habitat type and hydrological cycle

2016

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Waterbirds play important roles in maintaining ecosystem functioning in wetlands. However, the lack of essential information about the levels of interaction between waterbirds and wetland characteristics is a major impediment for service valuation. In this study, we examined the influence of the flood pulse across different freshwater habitats on the functional diversity and possible assembly structuring mechanisms of herons and storks in a neotropical floodplain. We investigated functional richness, evenness and divergence as descriptors of the functional diversity in rivers, channels and both connected and isolated lagoons across different phases of the hydrological cycle. We also compared observed values of functional diversity with expected null models to untangle the main mechanisms driving assemblages. We found spatiotemporal variation in functional diversity in wader assemblages of the high Paran a River floodplain. The functional diversity of Pelecaniformes and Ciconiiformes varied mainly in rivers, channels and connected lagoons opposed to isolated lagoons in a floodplain, and mostly during flood events, right after floods or after a long period of drought. This suggests that the variation in the water level plays different roles in maintaining wading birds' functional diversity in connected and isolated habitats. Also, wading bird assemblages in this floodplain may be structured by neutral mechanisms, independent of habitat type or hydrological period, which may support the idea that species traits are not important in explaining their coexistence patterns. Our study contributes to the understanding of how environmental variations may affect functional diversity, a first step towards understanding how changes in waterbird communities affect the magnitude and stability of services provided by them.

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Quantitative analysis of foraging habitat use by ciconiiformes in the upper Paraná river Floodplain, Brazil

Abstract: ABSTRACT

Cited by 13 publications

References 34 publications

Microhabitat use by three species of egret (Pelecaniformes, Ardeidae) in southern Brazil

Microhabitat use by three species of egret (Pelecaniformes, Ardeidae) in southern Brazil

Habitat‐mediated influence of water‐level fluctuations on waterbird occurrence in floodplain wetlands of the Parana River, Argentina

Wading bird functional diversity in a floodplain: Influence of habitat type and hydrological cycle

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