Uncertainty in estimating fish trophic positions and food web structure in highly polluted river basins

Carvalho, Débora Reis de; Alves, Carlos Bernardo Mascarenhas

doi:10.1007/s10641-021-01199-0

Cited by 3 publications

(1 citation statement)

References 65 publications

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“…The analysis of stable isotopes such as carbon (δ13C) and nitrogen (δ15N) represents an approach that is especially useful in areas that suffer from point source pollution [152,153]. These isotopes are related to the assimilation of carbon and nitrogen in the trophic chain and allow identifying the origins of these elements (i.e., if it comes from anthropic sources, such as sewage, or the ecological processes of nutrient cycling) [153,154]. However, this approach is also interesting for assessing the quality of effluent treatment as observed by the authors of [155] through an analysis of the community of the benthic macroinvertebrates.…”

Section: Stable Isotopes and Bioaccumulationmentioning

confidence: 99%

Biomonitoring for Watershed Protection from a Multiscale Land-Use Perspective

et al. 2023

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The types and intensification of land use in the watershed affect the living organisms in aquatic ecosystems differently; this impact will also vary according to temporal and spatial scales. Understanding these interactions is crucial in the design of biomonitoring programs to detect the effect of different pollutants in freshwater ecosystems and improve watershed management and conservation strategies. Therefore, this paper qualitatively reviews biomonitoring studies in freshwater ecosystems to evaluate the impact of different land use types on multiple scales in watersheds. The paper is organized into four sections. The first section presents biomonitoring in different freshwater systems (streams, rivers, lakes, and reservoirs). In the second section, we describe the biomonitoring characteristics of the main land use types. In the third section, we explain how spatial and temporal scales affect biomonitoring. Finally, in the fourth section, we focus on biomonitoring planning and future prediction and discuss how to design biomonitoring programs and how to use models and eDNA in biomonitoring. Our review will assist in decision-making regarding biomonitoring programs in watersheds and will guide future studies on the different bioindicators for various land use types in diverse ecosystems worldwide.

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Section: Stable Isotopes and Bioaccumulationmentioning

confidence: 99%

Biomonitoring for Watershed Protection from a Multiscale Land-Use Perspective

et al. 2023

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Food web structure of fish communities of Doce River, 5 years after the Fundão dam failure

de Carvalho,

Ferreira,

Dergam

et al. 2024

Environ Monit Assess

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Excessive Eutrophication as a Chemical Barrier for Fish Fauna Dispersion: A Case Study in the Emblematic Tietê River (São Paulo, Brazil)

Urbanski,

Nogueira

2024

Water

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The Tietê River receives most of the effluents and diffuse wastes from the São Paulo metropolis (21.9 million inhabitants). The study aimed to assess the extent to which environmental changes affected the fish fauna. We compared, in rainy and dry seasons, three sites in Tietê and three in tributaries with much better water quality conditions. No physical barriers exist between the sites. Fish were sampled with gillnets (exposed overnight) and the assemblage’s ecological attributes calculated. Water depth, transparency, temperature, electrical conductivity, dissolved oxygen, turbidity, total dissolved solids, pH, redox potential, total phosphorus, total nitrogen, and chlorophyll were simultaneously determined. Low oxygen concentrations (near zero in the rainy period), and the opposite for nutrients and total solids, separated the predominantly hypereutrophic Tietê from the tributaries (PCA). Differences in the fish assemblages were also evidenced (nMDS), including a higher richness per sample in tributaries (11 to 14 spp.) compared to Tietê (3 to 4 spp.). Siluriformes with accessory breathing dominated in Tietê and the highly tolerant detritivorous Prochilodus lineatus (the main commercial fish) was the only species found in all sites. The species correlated positively with oxygen in the tributaries and with turbidity, redox potential, and nutrients in Tietê (DistLM) (rainy season). Recovery measures are urgently required.

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Uncertainty in estimating fish trophic positions and food web structure in highly polluted river basins

Cited by 3 publications

References 65 publications

Biomonitoring for Watershed Protection from a Multiscale Land-Use Perspective

Biomonitoring for Watershed Protection from a Multiscale Land-Use Perspective

Food web structure of fish communities of Doce River, 5 years after the Fundão dam failure

Excessive Eutrophication as a Chemical Barrier for Fish Fauna Dispersion: A Case Study in the Emblematic Tietê River (São Paulo, Brazil)

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