Land cover affects the breakdown of Pinus elliottii needles litter by microorganisms in soil and stream systems of subtropical riparian zones

Rezende, Renan de Souza; Cararo, Emanuel Rampanelli; Bernardi, João Pedro; Chimello, Valeria; Lima‐Rezende, Cássia Alves; Albeny‐Simões, Daniel; Magro, Jacir Dal; Gonçalves, José Francisco

doi:10.1016/j.limno.2021.125905

Cited by 13 publications

(8 citation statements)

References 55 publications

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“…The high α diversity of benthic macroinvertebrates found for silviculture land cover, compared to natural grassland areas, was unexpected due to the already known negative effects of silviculture (Bayle, 2019;Rezende et al, 2021). This finding may be related to the higher litter input of silvi-culture systems compared to grasslands (Table S1).…”

Section: Spatial Diversity Of Macroinvertebratesmentioning

confidence: 86%

“…Several studies on the diversity of aquatic macroinvertebrates corroborate the high importance of environmental characteristics at the local scale (Doretto et al, 2021;Heino et al, 2015a;Rezende et al, 2019a;Mendes et al, 2021). Tropical and subtropical streams run through highly heterogeneous environments, including a vegetation gradient from grasslands to rainforests and elevation ranges from highlands to lowlands (Allan, 2004;Rezende et al, 2021). Among these environments, highland grasslands of subtropical South America harbor high endemism (Barros et al, 2015).…”

Section: Introductionmentioning

confidence: 86%

“…An increase in allochthonous litter input was also observed in areas with dense arboreal riparian vegetation, such as mixed ombrophilous forests, when compared mainly to grassland areas (Rezende et al, 2014a(Rezende et al, , 2016. High litter input increases the availability of food resources for benthic macroinvertebrates (Rezende et al, 2021;Tonin et al, 2021). Therefore, the high α diversity of benthic macroinvertebrates in mixed ombrophilous forests may be related to an increase in environmental heterogeneity (Nuven et al, 2022;Rezende et al, 2014a) and allochthonous litter input (Rezende et al, 2021;Tonin et al, 2021), which would also explain the high α diversity in silviculture land cover compared to grasslands.…”

Section: Spatial Diversity Of Macroinvertebratesmentioning

confidence: 99%

“…This finding may be related to the higher litter input of silvi-culture systems compared to grasslands (Table S1). However, silviculture areas may possess high toxicity due to the release of secondary compounds during leaf litter decomposition, thereby simplifying the food web (Carvalho et al, 2019;Gallon et al, 2020;Rezende et al, 2021). Therefore, high α diversity in silviculture systems compared to grasslands can lead to the inference that system litter input was more relevant than secondary compounds released by litter decomposition, because of the fast leaching of allelopathic compounds in leaves (Rezende et al, 2014a).…”

Section: Spatial Diversity Of Macroinvertebratesmentioning

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%

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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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Section: Spatial Diversity Of Macroinvertebratesmentioning

confidence: 86%