Changes in diet and niche breadth of a small fish species in response to the flood pulse in a Neotropical floodplain lake

Quirino, Bárbara Angélio; Carniatto, Natália; Guglielmetti, Renata; Fugi, Rosemara

doi:10.1016/j.limno.2016.10.005

Cited by 35 publications

(30 citation statements)

References 37 publications

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“…Seasonality is characterized by environmental changes derived from the annual cycles of temperature and water levels, with consequent changes in the availability of food resources (Abujanra et al ., ; Lowe‐McConnell, ). In our study area, pronounced annual changes occur mainly due to variations in temperature (Brasil, ), contrary to other tropical environments that are much more influenced by flood pulses (drought and flood) (Correa & Winemiller, ; Quirino et al ., ). In this aspect, we observed that the contribution of allochthonous material, occurred mainly in November (leaves) and February (seeds), coinciding with the period of highest temperatures and fruiting of plants in the region (Vieira, ; Strassburger, ).…”

Section: Discussionmentioning

confidence: 99%

“…Later, in other periods, A. dissensus and A. paris altered their diets, while other species maintained the constant consumption of certain resources. This result corroborates other studies that indicate that in the winter, the most available resources are mainly aquatic insects (Russo & Hahn, ; Quirino et al ., ). Conversely, individual variability in the diet was more heterogeneous in spring and summer, given the greater consumption of variable allochthonous resources.…”

Section: Discussionmentioning

confidence: 99%

“…Dietary preferences can also influence the use of resources (Novakowski et al, 2008;Tófoli et al, 2010;Walker et al, 2013), such that intraspecific variations are considered key factors in the understanding of the mechanisms that promote coexistence (Bison et al, 2015;Bolnick et al, 2011;Chase & Leibold, 2003;Zaret & Rand, 1971 (Russo & Hahn, 2006;Quirino et al, 2017). Conversely, individual variability in the diet was more heterogeneous in spring and summer, given the greater consumption of variable allochthonous resources.…”

Section: Discussionmentioning

confidence: 99%

“…Some authors have used a permutational analysis of multivariate dispersions (PERMDISP; Anderson, 2006) to verify individual intraspecific variability (Quirino et al, 2015(Quirino et al, , 2017 and to assess differences in intra and interspecific niche breadth, between hydrological periods (Correa & Winemiller, 2014;Silva et al, 2017). In our study however, we used the PERMDISP for both situations.…”

Section: Individual Intraspecific Variability and Niche Breadthmentioning

confidence: 99%

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Is resource partitioning the key? The role of intra‐interspecific variation in coexistence among five small endemic fish species (Characidae) in subtropical rivers

Neves

Silva

Baumgartner

et al. 2018

Journal of Fish Biology

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This study focused on intra and interspecific variations in the diet of small species in the Pelotas River, upper Uruguay River ecoregion. We tested the hypothesis that five small characids coexist via resource partitioning. Samplings were performed quarterly between August 2013 and May 2014 at 14 sites in the Pelotas River basin, using gillnets of different mesh sizes, seines, cast nets and electrofishing. In this study, the contents of 1,253 stomachs were analysed from Astyanax dissensus, A. paris, A. saguazu, A. xiru and Bryconamericus patriciae. The main food resources consumed were aquatic insects, leaves, seeds and detritus. There were significant seasonal intra and interspecific variations in the use of food resources by the five species. Permutational analysis of multivariate dispersions results indicated significant differences in individual intraspecific variability between the sampled periods, with the highest values found in November and February because of an increase in allochthonous resources (leaves and seeds). Besides this, significant differences in the proportions of consumption of allochthonous and autochthonous were observed. The trophic niche breadth was significantly different among the species, such that in August, the species had narrower niche breadths. In the other periods, the highest niche breadth values were due to an increase in the consumption of allochthonous items. Diet overlap was low (< 0.4) between 62% of the species pairs. The small characid species showed pronounced changes in resource use and intra and interspecific variations indicating resource partitioning. These factors appear to be essential in species interactions and for coexistence.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Individual Intraspecific Variability and Niche Breadthmentioning

confidence: 99%

See 2 more Smart Citations

Is resource partitioning the key? The role of intra‐interspecific variation in coexistence among five small endemic fish species (Characidae) in subtropical rivers

Neves

Silva

Baumgartner

et al. 2018

Journal of Fish Biology

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“…Quirino, Carniatto, Guglielmetti, & Fugi, 2017;Sepúlveda-Lozada, Saint-Paul, Mendoza-Carranza, Wolff, & Yáñez-Arancibia, 2017). These contrasting outcomes may derive from the complexity of floodplain dynamics over space and time (Alves, Hoeinghaus, F I G U R E 2 Biplot with δ 13 C e δ 15 N data (expressed in parts per thousand-‰) of both Hoplias species and mean (±SD) of all sampled primary energy sources.…”

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confidence: 99%

Stable isotopes reveal niche segregation between native and non‐native Hoplias in a Neotropical floodplain

Alves

Cionek

Manetta

et al. 2020

Ecology of Freshwater Fish

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We investigated whether isotopic niche partitioning could mediate the coexistence between native (Hoplias sp. B) and non‐native (Hoplias mbigua) trahira in a Neotropical floodplain. We hypothesised that during the dry season both species inhabit isolated sites (i.e. lakes) and thus rely on distinct food resources to sustain their coexistence. We found evidence of trophic segregation among native and non‐native freshwater fish in the Upper Paraná River, Brazil. Even though both species rely on the same primary littoral carbon sources and present similar trophic diversity, trophic segregation was attained through larger niche amplitude and smaller isotopic niche width for the non‐native fish. Three decades after initial invasion, non‐native Hoplias have distinct foraging behaviour and do not compete for trophic resources with native trahira; this is likely due to morpho‐anatomical differences. Limited morphological similarity between these congeneric species might be the strongest factor contributing to their coexistence in the Paraná River floodplain during the dry season.

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New insights on the surface hydrological connectivity of water depth thresholds in a flood-pulse-influenced floodplain system (Poyang Lake, China)

Zhang

Liu

et al. 2020

Stoch Environ Res Risk Assess

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Knowledge of hydrological connectivity and its threshold behaviors plays an important role in sustaining and managing floodplains; however, threshold behaviors at a system scale have not received adequate attention. This study used a geostatistical connectivity method in combination with hydrodynamic modeling experiments to provide new insights on the surface hydrological connectivity of water depth thresholds in a flood-pulse-influenced floodplain system (Poyang Lake, China). The results reveal that hydrological connectivity is more sensitive to changes in water depth during dry, rising, and receding water phases than in the flooding phase under different depth thresholds. Geographically, the connectivity patterns show that large water bodies are mainly distributed in the main lake and floodplain river channels; extensive floodplain areas are dynamically connected to the main lake, indicating that the lake's floodplain is a sensitive area of the flood pulse system. From a systemic perspective, the surface water connectivity exhibits abrupt changes under the depth threshold of around 50 cm, demonstrating a rapid system response to the threshold value. In the floodplains of Poyang Lake, surface topography and flood pulse dynamics play a combined role in affecting hydrological connectivity, especially low and intermediate connectivity. The filling-spilling process generally extends from the lower-lying main lake and floodplain rivers to the upper-lying floodplains of the lake. The current work quantifies the influences of depth thresholds on surface hydrological connectivity to pave the way for performing a joint assessment of hydrological connectivity and ecological responses based on developing comprehensive modellings in threshold-affected floodplains.

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Changes in diet and niche breadth of a small fish species in response to the flood pulse in a Neotropical floodplain lake

Cited by 35 publications

References 37 publications

Is resource partitioning the key? The role of intra‐interspecific variation in coexistence among five small endemic fish species (Characidae) in subtropical rivers

Is resource partitioning the key? The role of intra‐interspecific variation in coexistence among five small endemic fish species (Characidae) in subtropical rivers

Stable isotopes reveal niche segregation between native and non‐native Hoplias in a Neotropical floodplain

New insights on the surface hydrological connectivity of water depth thresholds in a flood-pulse-influenced floodplain system (Poyang Lake, China)

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