Variation in the carbon isotope composition of Semaprochilodus insignis, a detritivorous fish associated with oligotrophic and eutrophic Amazonian rivers

Benedito, Evanilde

doi:10.1006/jfbi.2002.2012

Cited by 12 publications

(16 citation statements)

References 7 publications

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“…Finally, we found that C 4 macrophytes had d 13 C and d 15 N signatures well separated from the other sources (-12.6 ± 1.6, 7.3 ± 0.6, respectively). These values were similar to those found by other stable isotope studies in the Amazonian aquatic system (Araujo-Lima et al, 1986;Benedicto-Cecilio et al, 2000;Leite et al, 2002;Benedicto-Cecilio & Araujo-Lima, 2002;Oliveira et al, 2006), and other neotropical aquatic systems (Hamilton et al, 1992;Lewis et al, 2001;Jepsen & Winemiller, 2007). The d 13 C values of C 3 macrophytes and periphyton samples were also within the range of those published in previous studies (Benedicto-Cecilio et al.…”

Section: Sourcessupporting

confidence: 91%

“…The d 13 C values of C 3 macrophytes and periphyton samples were also within the range of those published in previous studies (Benedicto-Cecilio et al. 2000;Benedicto-Cecilio & Araujo-Lima, 2002;Manetta et al, 2003) (Table 4).…”

Section: Sourcessupporting

confidence: 77%

“…This is surprising since, for example, phytoplankton represents only 2% of the net primary production of the Amazon River system, which is quite low compared to macrophytes (65%) or periphytic algae (10%) (Melack & Forsberg, 2001). However, macrophytes could also be a significant source sustaining fish productivity in the Amazon River systems (Benedicto-Cecilio et al, 2000;Benedicto-Cecilio & Araujo-Lima, 2002;Wantzen et al, 2002;Manetta et al, 2003;Oliveira et al, 2006), even if their direct consumption by fish seems unusual (Forsberg et al, 1993;Winemiller, 2004). Recently, Oliveira et al (2006) have suggested that macrophytes might serve as an indirect carbon source for fish through the consumption of invertebrates that live in the floodplain.…”

Section: Introductionmentioning

confidence: 97%

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Macroinvertebrate food web structure in a floodplain lake of the Bolivian Amazon

et al. 2010

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Two stable isotopes d 13 C and d 15 N were used to identify the energy sources and trophic relationships of the main freshwater macroinvertebrates in a floodplain lake of the Beni River (Bolivian Amazonia). Four energy sources (seston, bottom sediment, periphyton, and aquatic macrophytes) and macroinvertebrate communities were collected during three periods of the river hydrological cycle. Macroinvertebrates showed greater temporal variation in isotope values than their food sources. Six trophic chains were identified: four were based on seston, periphyton, C 3 macrophytes, and bottom sediments, and the last two chains on a combination of two carbon sources. One mixed seston and periphyton sources during the wet season while the other mixed periphyton and macrophytes sources during the wet and dry seasons. Periphyton was the most important energy source supporting the highest number of trophic levels and consumers. The macrophytic contribution was only significant during the dry season. Bottom sediments constituted a marginal energy source. As each season is associated with different physical and chemical conditions, processes organizing macroinvertebrate food web structure in the Beni floodplain seem strongly linked to hydrological seasonality.

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Section: Sourcessupporting

confidence: 91%

Section: Sourcessupporting

confidence: 77%

Section: Introductionmentioning

confidence: 97%

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Macroinvertebrate food web structure in a floodplain lake of the Bolivian Amazon

et al. 2010

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“…In fact, POC d 13 C values might have been related to the composition of more positive sources (periphytic algae) in the Paran´a River and more negative values in the phytoplankton, periphyton and riparian vegetation in the Ba´ıa subsystem. Benedito-Cecilio & Ara´ujo-Lima (2002) also found isotopic spatial differences in a detrital fish, Semaprochilodus insignis (Jardine & Schomburgk, 1841), between the oligotrophic and eutrophic parts of the Amazon River associated with spatial isotopic variation in detrital aggregates, the principal source used by this fish. Although C 4 plants are not common (low density and number of species), the C 4 carbon contribution to P. lineatus cannot be discounted along the upper Paran´a River, including the extensions of the Itaipu Reservoir and the floodplain.…”

Section: Discussionmentioning

confidence: 91%

Variability in the carbon isotope signature of Prochilodus lineatus (Prochilodontidae, Characiformes) a bottom‐feeding fish of the Neotropical region

Lopes

Benedito

Martinelli

2007

Journal of Fish Biology

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The spatial and seasonal variability of stable carbon isotopes in detritivorous Prochilodus lineatus, primary producers and particulate organic carbon (POC) were examined to promote a better understanding of the trophic dynamics of food webs in Neotropical ecosystems. Spatial variability in carbon isotope composition in the species showed a decreasing gradient in the Upper Paran´a River system, from the Paran´a River and Itaipu Reservoir subsystems to the Ba´ıa and Ivinheima subsystems. Fish d 13 C followed the isotopic trend of POC along the Paran´a River and Ba´ıa subsystem. Seasonal differences were not observed in fish. The analysis of percentile contribution of C 3 and C 4 sources in the species diet revealed the predominance of C 3 plants (phytoplanktonic and periphytic algae and riparian vegetation) in most of the analysed subsystems and seasons. Nevertheless, the considerable participation of riparian vegetation was verified, especially in the Ivinheima subsystem in the dry season. C 4 macrophytes presented a maximum contribution along the Upper Paran´a River. These results demonstrate the existence of specific variability for the consumer and their food sources in different environments of the same ecosystem.

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“…It is the same with Central Amazon floodplains where phytoplankton represents a great part of the carbon content of the main species of commercial fish, both in adult (Forsberg et al, 1993;Benedito-Cecilio et al, 2002) and larval stages (Leite et al, 2002) despite making up only 2 % of the regional primary production (Melack and Forsberg, 2001). Thus, phytoplankton is a key element in the food chain of the fishing industry, and since fish is the main source of protein of the riverine population (Santos et al, 2006), the study of phytoplankton is critical to regional development.…”

Section: Introductionmentioning

confidence: 86%

Seasonal Variation in the Distribution and Isotopic Composition of Phytoplankton in an Amazon Floodplain Lake, Brazil

2014

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Variación estacional de la distribución y composición isotópica del fitoplancton en un lago de inundación en la Amazonia, Brasil PEDRO ABSTRACTTo evaluate the seasonal variation and isotopic composition of phytoplankton, water samples were collected monthly between October 2007 and November 2008 in Lake Catalão, a floodplain lake at the confluence between rivers Negro and Amazon. Analyses of total chlorophyll concentration and δ 13 C and δ 15 N isotopic abundances were made from particulate size fractions of 30-60, 10-30 and <10 µm in the littoral, pelagic, and floating meadows regions. Chlorophyll concentration was found to be inversely associated to lake depth, and high concentrations of chlorophyll in the floating meadows zone were significant. The fraction <10 µm was the most abundant representing in average more than 40 % of the particulate matter. The δ 13 C values were relatively constant during the study (-25.1 ‰ ~ -34.0 ‰), whereas the δ 15 N values showed strong variability (15.6 ‰ 2 .4 ‰), which has been attributed to the resuspension of sediments during mixing of the water column. Mixing associated to the sudden drop in temperature during the rising water period was an important event in the trophic and isotopic dynamics of the lake. Variations in chlorophyll content were generally associated with the dilution process, in which concentration was inversely correlated to the water level, whereas abundance was directly correlated to the water level.Keywords: Amazon, floodplain lake, size-fractionated phytoplankton, stable isotopes. RESUMENCon el propósito de evaluar la variación estacional de la abundancia isotópica (δ 13 C e δ 15 N) del fitoplancton, muestreos mensuales fueron realizados entre octubre de 2007 y noviembre de 2008 en el lago Catalão, un lago de inundación en la zona de confluencia de los ríos Negro y Solimões, ubicado frente a la ciudad de Manaus (AM, Brasil). Análisis de la clorofila total y evaluaciones de la abundancia natural de δ 13 C y δ15N fueron realizados en las fracciones partículadas de 30-60, 10-30 y <10 µm en las zonas litoral, pelágica y de macrófitas acuáticas. La concentración de clorofila presentó una relación inversa con la profundidad del lago, siendo relevantes las altas concentraciones encontradas dentro del tapete de macrófitas acuáticas. La fracción <10µm fue la que presentó la mayor concentración de clorofila, representando más del 40% del material particulado. Los valores de δ 13 C fueron relativamente constantes durante el período de estudio (-25,1 ‰ ~ -34 ‰), mientras que la abundancia natural de δ 15 N presentó una amplia variación (15,6 ‰ ~ -2,4 ‰), que fue atribuida al proceso de resuspensión de los sedimentos en los procesos de mezcla de la columna de agua. En este contexto, el fenómeno de la mezcla asociada con Artículo de investigaciónACTA BIOLÓGICA COLOMBIANA Acta biol. Colomb., 19(2):291-304, mayo -agosto de 2014 -291 la friaje durante el período de aguas altas, fue un evento importante en la dinámica trófica e isotópica del lago. En general las vari...

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Variation in the carbon isotope composition of Semaprochilodus insignis, a detritivorous fish associated with oligotrophic and eutrophic Amazonian rivers

Cited by 12 publications

References 7 publications

Macroinvertebrate food web structure in a floodplain lake of the Bolivian Amazon

Macroinvertebrate food web structure in a floodplain lake of the Bolivian Amazon

Variability in the carbon isotope signature of Prochilodus lineatus (Prochilodontidae, Characiformes) a bottom‐feeding fish of the Neotropical region

Seasonal Variation in the Distribution and Isotopic Composition of Phytoplankton in an Amazon Floodplain Lake, Brazil

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