The leaf breakdown of Picramnia sellowii (Picramniales: Picramniaceae) as index of anthropic disturbances in tropical streams

Lopes, Mariana Calábria; Martins, Renato Tavares; Silveira, Lidimara Souza da; Alves, Roberto da Gama

doi:10.1590/1519-6984.00414

Cited by 19 publications

(11 citation statements)

References 44 publications

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“…No differences in decomposition rates across climate zones might result from the following reasons. First, the positive impacts of high stream water temperature are counteracted by low water dissolved O 2 at low latitudes (Iñiguez‐Armijos et al, ; Lopes, Martins, Silveira, & Alves, ). High temperature usually stimulates litter decomposition (Ferreira & Canhoto, ; Ferreira, Chauvet, et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…However, water dissolved O 2 in streams usually decreases significantly with increasing water temperatures (Gonçalves et al, ; Iñiguez‐Armijos et al, ; Pettit et al, ). Low dissolved O 2 could lead to anaerobic conditions and significantly decrease decomposition by inhibiting decomposer activities (Lopes et al, ; Medeiros, Pascoal, & Graça, ; Pérez, Menéndez, Larrañaga, & Pozo, ; Pettit et al, ; Schlief & Mutz, ; Webster & Benfield, ). Second, high microbial activities at low latitudes are counteracted by low invertebrate activities (Haapala, Muotka, & Markkola, ; Walpola, Leichtfried, Amarasinghe, & Füreder, ).…”

Section: Discussionmentioning

confidence: 99%

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Leaf litter traits predominantly control litter decomposition in streams worldwide

Zhang

Cheng

Geng

et al. 2019

Global Ecol Biogeogr

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Aim Leaf litter decomposition in freshwater ecosystems is a vital process linking ecosystem nutrient cycling, energy transfer and trophic interactions. In comparison to terrestrial ecosystems, in which researchers find that litter traits predominantly regulate litter decomposition worldwide, the dominant factors controlling its decomposition in aquatic ecosystems are still debated, with global patterns not well documented. Here, we aimed to explore general patterns and key drivers (e.g., litter traits, climate and water characteristics) of leaf litter decomposition in streams worldwide. Location Global. Time period 1977–2018. Major taxa studied Leaf litter. Methods We synthesized 1,707 records of litter decomposition in streams from 275 studies. We explored variations in decomposition rates among climate zones and tree functional types and between mesh size groups. Regressions were performed to identify the factors that played dominant roles in litter decomposition globally. Results Litter decomposition rates did not differ among tropical, temperate and cold climate zones. Decomposition rates of litter from evergreen conifer trees were much lower than those of deciduous and evergreen broadleaf trees, attributed to the low quality of litter from evergreen conifers. No significant differences were found between decomposition rates of litter from deciduous and evergreen broadleaf trees. Additionally, litter decomposition rates were much higher in coarse‐ than in fine‐mesh bags, which controled the entrance of decomposers of different body sizes. Multiple regressions showed that litter traits (including lignin, C:N ratio) and elevation were the most important factors in regulating leaf litter decomposition. Main conclusions Litter traits predominantly control leaf litter decomposition in streams worldwide. Although further analyses are necessary to explore whether commonalities of the predominant role of litter traits in decomposition exist in both aquatic and terrestrial ecosystems, our findings could contribute to the use of trait‐based approaches in modelling the decomposition of litter in streams globally and exploring mechanisms of land–water–atmosphere carbon fluxes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Leaf litter traits predominantly control litter decomposition in streams worldwide

Zhang

Cheng

Geng

et al. 2019

Global Ecol Biogeogr

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“…This farm is an area of semi-deciduous secondary forest (∼400 ha) and is contiguous with the forest of Reserva Biológica Municipal Poço D’Anta (Neto et al 2009). The streams in this area are shallow (0.2 ± 0.1 m [SD]), narrow (1.7 ± 0.7 m), shaded by dense riparian vegetation (canopy cover = 86.11 ± 1.73%), and have near-neutral (pH = 6.7 ± 0.1) and well-oxygenated (7.9 ± 0.8 mg/L) water, with a low capacity to conduct electrical current (26.6 ± 2.9 µS/cm), and an average temperature of 17.8 ± 0.5 °C (Lopes et al 2015). Moreover, in the bottom sand is prevailing and has 12.7 ± 1.1% of organic matter, composed principally by leaves (60.0 ± 9.1%).…”

Section: Methodsmentioning

confidence: 99%

“…Green leaves of P. sellowii were collected and dried at air temperature. We used green leaves because they were recorded in a higher quantity in relation to senescent leaves in streams (Lopes et al 2015). Leaves of P. sellowii presented 29.68 mg N/g of total biomass, 1.22 mg P/g, and 546.95 mg C/g and had low specific mass (4.9 ± 1.3 mg/cm 2 ).…”

Section: Methodsmentioning

confidence: 99%

Invertebrates, Fungal Biomass, and Leaf Breakdown in Pools and Riffles of Neotropical Streams

Martins

Silveira

Lopes

et al. 2017

Journal of Insect Science

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We evaluated fungal biomass (as ergosterol concentration) and invertebrate colonization during leaf breakdown of Picramnia sellowii Planch. (Picramniaceae) in pools and riffles of three low-order forested streams in southeastern Brazil. We hypothesized that leaf breakdown will be higher in riffles due to the high physical fragmentation and fungal activity. The experiment was carried out during the dry season of 2012, using 108 litter bags, each containing 3 ± 0.05 g of air-dried leaves. After 7, 15, 30, 60, 90, and 120 d of incubation, six litter bags (riffle = 3 and pool = 3) were removed from each stream. Leaf breakdown rate (k) was classified as intermediate in pools and fast in riffles. We recorded similar values of remaining leaf mass in two habitats until 60 d. However, at 90 and 120 d, this process was faster in riffles. The mean fungal biomass was similar between habitats and showed an increase during the experiment at 90 d. Fauna composition differed between habitats and across sampling dates, with Chironomidae most contributing to these differences and being particularly abundant in riffles and in the initial period of leaf breakdown (until 30 d). Shredder abundance and biomass were not different between habitats and among incubation durations. Leaf breakdown (remaining leaf mass) was positively associated with fungal and shredder biomasses. However, water velocity was not related to leaf breakdown. These findings emphasize the importance of fungal and shredder organisms, as well as the low importance of water velocity, on mass loss in low-order tropical streams.

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“…The alteration of biodiversity in urban streams has been usually assessed on structural attributes of plant and animal communities, such as the decrease in species richness and diversity (Cooper, Lake, Sabater, Melack, & Sabo, 2013;Robinson, Schuwirth, Baumgartner, & Stamm, 2014;Roy et al, 2016), and species replacement (Arnon, Avni, & Gafny, 2015;Sterling et al, 2016;Wright, 1995). However, urbanisation also disrupts ecosystem functions such as the cycling of plant litter (Lopes, Martins, Silveira, & Alves, 2015;Paul, Meyer, & Couch, 2006;Yule, Gan, Jinggut, & Lee, 2015), a key process that fundamentally links aquatic and terrestrial ecosystems. From the many factors that negatively affect the processing of organic matter, imperviousness is a commonly used predictor of stream deterioration involving structural and functional components such as detritus cycling (Imberger, Walsh, & Grace, 2008).…”

mentioning

confidence: 99%

Urbanisation reduces litter breakdown rates and affects benthic invertebrate structure in Pampean streams

Tagliaferro

Giorgi

Torremorell

et al. 2019

Internat Rev Hydrobiol

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The Pampean region has become one of the most urbanised areas in South America with more than 91% of the Argentinean population. This region is ideal for human settlements that have historically chosen riverine grassland areas to settle. Consequently, urban streams are increasingly subjected to pressures affecting their functioning. The aim of this study was to assess urbanisation effects on two proxies of stream integrity: leaf litter decay and benthic invertebrate assemblage colonizing litter in streams draining urbanised versus reference grassland areas. We placed plastic coarse‐ and fine‐mesh bags containing Populus nigra leaf litter along three urban and three reference reaches, and these were retrieved periodically to determine the remaining leaf mass and the identity and quantity of detritivore assemblage colonizing bags. The decay rate was negatively affected by urbanisation, and it followed a negative relationship with increasing Nitrogen concentration (mostly ammonia) and a hump‐shape relationship against soluble reactive phosphorus. Urban invertebrate assemblages were significantly different from the reference reaches, and were species‐poorer and characterized by tolerant taxa belonging to Naididae, Glossiphoniidae, and Nematoda, whereas Hyalellidae, Aeglidae, Chironomidae, Caenidae, Baetidae, and Hydrobiidae represented the reference reaches. Our proxies of structural (i.e., invertebrate assemblages) and functional (i.e., leaf litter breakdown) stream integrity were mostly driven by a nutrient‐enrichment gradient and responded in a similar direction but with different magnitude to urban alterations.

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The leaf breakdown of Picramnia sellowii (Picramniales: Picramniaceae) as index of anthropic disturbances in tropical streams

Cited by 19 publications

References 44 publications

Leaf litter traits predominantly control litter decomposition in streams worldwide

Leaf litter traits predominantly control litter decomposition in streams worldwide

Invertebrates, Fungal Biomass, and Leaf Breakdown in Pools and Riffles of Neotropical Streams

Urbanisation reduces litter breakdown rates and affects benthic invertebrate structure in Pampean streams

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