Anthropogenic impacts influence the functional traits of Chironomidae (Diptera) assemblages in a neotropical savanna river basin

Martins, Isabela; Castro, Diego Marcel Parreira de; Macedo, Diego Rodrigues; Hughes, Robert M.; Callisto, Marcos

doi:10.1007/s10452-021-09884-z

Cited by 21 publications

(8 citation statements)

References 99 publications

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“…The larvae of Stenochironomus (Figure 1) are found mining leaves or immersed wood in standing and flowing waters [38]. Due to its strictly mining habit which contributes to decomposition of wood, leaves, and aquatic macrophytes, Stenochironomus is regarded as important bioindicator in freshwater ecosystems [39][40][41]. Prior to this study, the mitogenomic characteristics of Stenochironomus have never been studied.…”

Section: Introductionmentioning

confidence: 99%

First Report on Mitochondrial Gene Rearrangement in Non-Biting Midges, Revealing a Synapomorphy in Stenochironomus Kieffer (Diptera: Chironomidae)

Zheng

Liu

Zhao

et al. 2022

Insects

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(1) Background: Gene rearrangement of mitochondrial genome, especially those with phylogenetic signals, has long fascinated evolutionary biologists. The synapomorphic gene rearrangements have been identified across multiple orders and at many different taxonomic levels, supporting the monophyletic or systematic relationships of related lineages. However, mitochondrial gene rearrangement has never been observed in the non-biting midges (Diptera: Chironomidae); (2) methods: in this study, the complete mitogenomes of seven Stenochironomus species were sequenced and analyzed for the first time; (3) results: each mitogenome of Stenochironomus contains 37 typical genes and a control region. The whole mitogenomes of Stenochironomus species exhibit a higher A+T bias than other published chironomid species. The gene order rearranges from trnI-trnQ-trnM to trnI-trnM-trnQ in all the seven mitogenomes of Stenochironomus, which might be act as a synapomorphy of the genus, supporting the monophyletic of Stenochironomus species. In addition, another derived gene cluster: trnA-trnG-ND3-trnR exists in Stenochironomus tobaduodecimus. The derived gene orders described above are the first case of mitochondrial gene rearrangement in Chironomidae. Coupled with published data, phylogenetic relationships were reconstructed within Chironominae, and strongly supported the monophyly of Stenochironomus; (4) conclusions: our study provides new insights into the mitochondrial gene order of Chironomidae, and provides a valuable resource for understanding the synapomorphic gene rearrangements.

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Section: Introductionmentioning

confidence: 99%

First Report on Mitochondrial Gene Rearrangement in Non-Biting Midges, Revealing a Synapomorphy in Stenochironomus Kieffer (Diptera: Chironomidae)

Zheng

Liu

Zhao

et al. 2022

Insects

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“…The disappearance of the Oligochaeta subclass, as well as the decrease in the percentage of Chironomidae, was an unexpected effect, because these groups are considered resistant to environmental disturbances (Beyene et al, 2009;Hodkinson & Jackson, 2005;Junqueira & Campos, 1998). Furthermore, chironomids can be found in areas ranging from low to high anthropogenic disturbance (Martins et al, 2021). The dam rupture generated a transport of the sediment to the downstream stretches and may have buried these organisms, implying their disappearance (Jones et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Impacts of sedimentation and dam failure on the macroinvertebrate community in a tropical stream

Pinto¹,

Smith²

2023

Limnetica

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Changes in land use due to human activities lead to disturbances related to sedimentation in aquatic ecosystems. Furthermore, the construction of dams in streams raises concerns about their safety, and the rupture of these structures implies significant impacts. Thus, this article assessed the effects of sedimentation and dam failure on the aquatic macroinvertebrate community in a tropical stream and verified its influence on the structural and functional composition of this assemblage of organisms. Water physical-chemical parameters and macroinvertebrate fauna data were obtained from monitoring data for both the pre- and post-rupture period. Macroinvertebrates were identified at the family level and classified according to functional feeding groups. Structural and functional biological indexes were applied, and data were analyzed using comparison tests, correla¬tion matrix, correspondence, and cluster analysis. The results showed that sedimentation resulted in the impoverishment of macroinvertebrate fauna, with the loss of important functional feeding groups, indicating a low environmental quality. Dam failure changed the composition of the fauna, leading to the disappearance of important orders, the appearance of organisms belonging to the order Coleoptera, and the loss of feeding groups with consequent loss of ecological functions. The dam failure was not the only stressor for the studied stream, because it already suffered from small and medium scale disturbances related to sedimentation. However, the rupture of the structure resulted in greater environmental losses, and is considered large scale, implying the need to implement recovery measures in the area.

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“…Based on this inventory of benthic macroinvertebrate communities, average family richness and density were calculated for each sampling site. This methodology has yielded good results in studies of Neotropical streams (Firmiano et al, 2021;Hamada et al, 2014;Linares et al, 2021;Martins et al, 2021;Rezende et al, 2014b).…”

Section: Macroinvertebrate Collection and Processingmentioning

confidence: 99%

“…Human activities have negative impacts on inland aquatic systems (Allan, 2004;Rezende et al, 2014b). Some land uses [e.g., native vegetation replacement with pastures, agriculture or urbanization (Firmiano et al, 2021;Jankowski et al, 2021;Rezende et al, 2021)] may decrease stream bed stability (Allan, 2004;Shanafield et al, 2021) and alter both the organic matter dynamic (Burwood et al, 2021;Rezende et al, 2021) and water physicochemical characteristics [e.g., dissolved nutrient input, pH, electrical conductivity, and dissolved oxygen (Chen et al, 2021;Martins et al, 2021;Tonin et al, 2021)]. Anthropogenic land covers may also favor the best competitor, thereby increasing the abundance of a few organisms (Allan, 2004;Shanafield et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Land-use effects on aquatic macroinvertebrate diversity in subtropical highland grasslands streams

Bacca¹,

Cararo²,

Lima‐Rezende³

et al. 2023

Limnetica

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Knowledge of the frequency and occurrence of macroinvertebrates throughout landscapes may clarify the effects of anthropic impacts on aquatic systems and help guide conservation actions for watersheds. We evaluated macroinvertebrate α and β diversity in streams in four different subtropical phytophysiognomies: highland grasslands with arboreal riparian vegetation, highland grasslands without arboreal riparian vegetation, mixed ombrophilous forest and silviculture. We also evaluated how environmental factors influence α diversity. We sampled macroinvertebrate communities (by Surber sampler), litter input (by nets) and physicochemical variables of the water (by multiparameter and chemical analysis) at 10 sites in riparian zones of a highland system. A total of 2124 individuals were sampled representing 41 taxa, with high α and β diversity in mixed ombrophilous forest. The results indicate that environmental heterogeneity increases food resource availability, as well as macroinvertebrate diversity. Furthermore, the β diversity was found to increase with distance among the unconnected streams. Areas of silviculture had the highest density values among the sampled areas due high organic material stock in the soil. Therefore, higher leaf litter input may decrease the toxicity effect of secondary compounds released by leaf plant decomposition compared to environments with low systemic leaf litter input, such as highland grasslands. The presence of arboreal riparian vegetation drives canopy openness, water temperature, dissolved oxygen, and orthophosphate in streams, which control the frequency and occurrence of benthic macroinvertebrates. Homogeneous systems, as naturally observed in highland grasslands, plus high canopy openness decrease macroinvertebrate richness and density. The naturally low richness of highland grasslands, although with endemic species, may be an important guideline for legislation on anthropic impacts, management, and conservation of streams in this specific subtropical zone.

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Anthropogenic impacts influence the functional traits of Chironomidae (Diptera) assemblages in a neotropical savanna river basin

Cited by 21 publications

References 99 publications

First Report on Mitochondrial Gene Rearrangement in Non-Biting Midges, Revealing a Synapomorphy in Stenochironomus Kieffer (Diptera: Chironomidae)

First Report on Mitochondrial Gene Rearrangement in Non-Biting Midges, Revealing a Synapomorphy in Stenochironomus Kieffer (Diptera: Chironomidae)

Impacts of sedimentation and dam failure on the macroinvertebrate community in a tropical stream

Land-use effects on aquatic macroinvertebrate diversity in subtropical highland grasslands streams

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