Small forest losses degrade stream macroinvertebrate assemblages in the eastern Brazilian Amazon

Brito, Janaína Gomes de; Roque, Fábio O.; Martins, Renato Tavares; Nessimian, Jorge Luiz; Oliveira, Vívian Campos de; Hughes, Robert M.; Paula, Felipe Rossetti de; Ferraz, Sílvio; Hamada, Neusa

doi:10.1016/j.biocon.2019.108263

Cited by 59 publications

(25 citation statements)

References 94 publications

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“…In other studies, macroinvertebrate abundance was predominantly affected by local land use (Allan, 2004) and only 1.4%-6.5% reduction in riparian vegetation coverage was associated with the loss of sensitive macroinvertebrate species (Brito et al, 2020;Dala-Corte et al, 2020).…”

Section: Resultsmentioning

confidence: 76%

“…High IDI values were also associated with an increased risk of biological changes related to human activities in other Cerrado streams (Ligeiro et al, 2013). Bed instability and excess fine sediments are associated with disturbances in the catchment and riparian zone, thereby reducing MMI scores and sensitive taxa (Brito et al, 2020;Dala-Corte et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

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Major risks to aquatic biotic condition in a Neotropical Savanna River basin

Martins

Macedo

Hughes

et al. 2021

River Research & Apps

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Conditions in freshwater ecosystems are responsible for maintaining biodiversity and other ecosystem services. Identifying and understanding how anthropogenic disturbances affect biotic conditions are important steps in rehabilitating and protecting environmental quality. The relative risk, relative extent, and attributable risk approaches are used to determine ecosystem conditions in ecological monitoring programs conducted across large spatial extents. Our study was conducted in the Pandeiros River basin, which is a protected area in Minas Gerais, Brazil, that contains 233 km of mapped streams that were perennial and accessible. Field sampling was conducted in the dry period (April and June 2016) at 40 randomly selected sites. Ten multimetric indices (MMIs), previously determined to be sensitive in this river basin, were calculated. All the physical habitat disturbance metrics were significantly correlated with the MMIs. The risk of finding poor MMI scores was 1.6-1.7 times higher at sites with a high integrated disturbance index (IDI) or local disturbance index (LDI) score. Pasture was the most extensive disturbance, affecting 40.8% of the stream length, followed by 40.1% for low bed stability, 29% for fine substrates (<16 mm), 24.4% for high IDI scores, and 21.7% for high LDI scores. This is useful to know for five reasons: ( 1) standardized MMIs can assess environmental quality. (2) MMIs clarify that both catchment and local disturbances may represent serious risks to aquatic assemblages. (3) MMIs indicate which disturbances represent the most risk by comparing MMI scores against disturbance scores. (4) MMI risk assessments facilitate choosing the most appropriate mitigation actions. (5) Our results suggest environmental conservation actions for similar river basins.

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Section: Resultsmentioning

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Major risks to aquatic biotic condition in a Neotropical Savanna River basin

Martins

Macedo

Hughes

et al. 2021

River Research & Apps

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“…In Brazil, Federal Law 12651/2012 states that, for streams up to 10m wide, at least 30m of riparian vegetation width must be protected in all biomes. In spite of this, there is little scientific support that this minimum riparian zone width is adequate to maintain the biodiversity of the associated stream ecosystems (Brito et al, 2020;Leal et al, 2018;Luke et al, 2019;Metzger, 2010).…”

Section: Introductionmentioning

confidence: 99%

Do wider riparian zones alter benthic macroinvertebrate assemblages’ diversity and taxonomic composition in neotropical headwater streams?

et al. 2021

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Aim The maintenance and condition of riparian vegetation are important factors for conserving headwater streams and their species diversity. Thus, variations in the width of a riparian zone can have dramatic effects in the structure and functioning of the adjacent freshwater ecosystem. In this study, we aimed to determine if increased riparian zone width changed the benthic assemblages’ structure (diversity, taxonomic and functional composition) in headwater streams. Methods We tested two predictions: (1) increased riparian zone width will change the diversity and taxonomic composition of benthic macroinvertebrate assemblages because narrow riparian zones do not buffer the anthropogenic impacts from the surrounding landscape; (2) wider riparian zones will change benthic macroinvertebrate assemblages’ functional structure, due to changes to energetic input and quality. To test the first prediction, we assessed the benthic macroinvertebrate assemblages’ taxonomic composition, richness and Shannon-Wiener diversity index. To test the second prediction, we assessed functional feeding groups (FFG) and metrics based on their proportion. Results Our results showed that our first prediction was not corroborated, because taxonomic structure and diversity did not show significant variation with increased riparian zone width. Our second prediction was partially corroborated, because there were significant alterations in the functional structure of benthic macroinvertebrate assemblages between the narrowest riparian zone width (30 m) and the others two (50 and 100 m). Conclusions Our results suggest that, contrary to the Brazilian Federal Law 12651/2012, 30-m wide riparian zones are insufficient to protect headwater stream ecosystem functioning.

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“…For example, in Oregon (USA), water body monitoring and assessment data from eight different institutions were easily synthesized because all used a standard survey design, standard methods, and the same environmental and biological indicators [ 55 ]. Multiple Brazilian universities employed the same NARS survey design, standard sampling methods, and indicators for regionally assessing Atlantic Forest [ 39 ] Cerrado [ 8 , 68 ] and Amazônia [ 3 , 47 ] streams. Jimenez-Valencia et al [ 39 ] determined that 62% of basin stream length was in poor condition based on macroinvertebrate assemblage condition,the risk of poor condition was four-fold greater in catchments with degraded forest.…”

Section: Introductionmentioning

confidence: 99%

Big data challenges in overcoming China’s water and air pollution: relevant data and indicators

et al. 2021

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Big data are potentially useful for environmental management planning and actions that can be directed toward pollution control. China is using big data approaches to help reduce its current levels of pollution. However, also needed are better environmental indicators, measurement technologies, data management and reporting, and adaptive management and enforcement. Based on continental-extent monitoring and assessment programs in Europe and the USA, we recommend three major programmatic changes for China. (1) Establish long-term systemic environmental and human health objectives and indicators. (2) Adopt national standard methods for survey designs, sampling and analytical protocols, statistical analyses, and collaborative sampling programs. (3) Provide a transparent process for reporting and correcting data errors.

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Small forest losses degrade stream macroinvertebrate assemblages in the eastern Brazilian Amazon

Cited by 59 publications

References 94 publications

Major risks to aquatic biotic condition in a Neotropical Savanna River basin

Major risks to aquatic biotic condition in a Neotropical Savanna River basin

Do wider riparian zones alter benthic macroinvertebrate assemblages’ diversity and taxonomic composition in neotropical headwater streams?

Big data challenges in overcoming China’s water and air pollution: relevant data and indicators

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