Temporal and Spatial Patterns in Inputs and Stock of Organic Matter in Savannah Streams of Central Brazil

Bambi, Paulino; Rezende, Renan de Souza; Feio, Maria João; Leite, Gustavo Figueiredo Marques; Alvin, Elisa; Quintão, José Maurício Brandão; Araújo, F. S. de; Júnior, José Francisco Gonçalves

doi:10.1007/s10021-016-0058-z

Cited by 42 publications

(36 citation statements)

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“…It is an abundant plant species found in riparian zones of the Cerrado Biome and exploited by Phylloicus sp. according to Navarro et al (2013) and Bambi et al (2016).…”

Section: Methodsmentioning

confidence: 98%

Effect of leaf decomposition stage and water temperature on fragmentation activity of a shredder invertebrate species in lotic ecosystems

Navarro

Júnior

2017

Iheringia, Sér. Zool.

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ABSTRACT. The attractiveness of a given leaf detritus to invertebrates depends on the chemical composition, physical structure, stage of microbial colonization and decomposition level. In addition to the leaf detritus quality, water temperature also aff ects organic matter cycling in aquatic environments. In this context, the objectives of this study were: i) to increase knowledge about the role of invertebrate shredders on fragmenting senescent, conditioned senescent and green leaves of Richeria grandis Vahl. (Phyllanthaceae) under gradual temperature rise and check leaf mass loss; ii) to verify the preference of Phylloicus sp. (Trichoptera) for leaves for larval case production. The experiment I consisted of three treatments with diff erent water temperatures: 20°C, 24°C and 28°C. In the experiment II, we added 10 discs of green leaves of R. grandis and two shredder invertebrates (Phylloicus sp.) to each aquarium. Leaf mass loss in the presence or absence of fragmentation was not signifi cantly infl uenced by diff erences in the intraspecifi c quality of the detritus or temperature. Intraspecifi c quality of resources mixed with green leaves can lead to increased contact of phenolic content on senescent leaves, leading to a similarity in food exploitation by invertebrates. However, the production of larval cases by Phylloicus sp. seems to be dependent on the resistance presented by the resource rather than the phenolic content, thus leading the shredders to use signifi cantly more senescent detritus, regardless temperature.KEYWORDS. Microcosms, chemical composition, Phylloicus sp., warming of water.RESUMO. Efeito do estágio de decomposição foliar e temperatura da água sobre a atividade de fragmentação de uma espécie de invertebrado fragmentador em ecossistemas lóticos. A atratividade de um determinado detrito foliar pelos invertebrados depende da composição química, estrutura física, estágio de colonização microbiana e nível de degradação do detrito. Além da qualidade do detrito foliar, a temperatura da água tem sido outro fator que pode levar a variações na velocidade da ciclagem de matéria orgânica em ambientes aquáticos. Os objetivos deste estudo foram: i) ampliar os conhecimentos acerca do papel dos invertebrados fragmentadores sobre a atividade de fragmentação de folhas senescentes, senescentes condicionadas e verdes de Richeria grandis Vahl. (Phyllanthaceae) sob elevações graduais de temperatura e verifi car as possíveis consequências sobre a perda de massa foliar; ii) verifi car a preferência de recurso foliar para a construção de casulo pelo invertebrado fragmentador Phylloicus sp. (Trichoptera). O experimento I foi constituído de três tratamentos que se diferiram apenas na temperatura da água: Tratamento 1: 20°C, Tratamento 2: 24°C, Tratamento 3: 28°C. O experimento II se diferiu do I pelo acréscimo de dez discos de folhas verdes de R. grandis e dois invertebrados (Phylloicus sp.) em cada aquário. A perda de massa foliar na presença ou ausência de atividade de fragmentação não foi infl uenciada signif...

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“…It is an abundant plant species found in riparian zones of the Cerrado Biome and exploited by Phylloicus sp. according to Navarro et al (2013) and Bambi et al (2016).…”

Section: Methodsmentioning

confidence: 98%

Effect of leaf decomposition stage and water temperature on fragmentation activity of a shredder invertebrate species in lotic ecosystems

Navarro

Júnior

2017

Iheringia, Sér. Zool.

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“…The stock of litter in streams can often reflect the organic matter input from adjacent vegetation (Bilby and Likens, 1980;Swanson et al, 1982), and exhibit similar patterns (Bambi et al, 2017). However, the presence and persistence of terrestrial material in the streambed is also related to several factors including composition, organization and densities of trees, seasonality and channel morphology (Fleituch, 2001;Gonçalves et al, 2006a;França et al, 2009;Tank et al, 2010;Flores et al, 2013;Lisboa et al, 2015;Bambi et al, 2017). Therefore, even with variation among sites in the degree of canopy cover and leaf input (Tab.…”

Section: Longitudinal Patterns In Shredders and Leavesmentioning

confidence: 99%

“…Especially in loworder streams covered by dense riparian vegetation, allochthonous organic matter represents the main resource for aquatic fauna (Wallace et al, 1997). Leaves compose the major fraction of allochthonous organic matter entering in streams (França et al, 2009;Gonçalves et al, 2014;Bambi et al, 2017) and once in the lotic environment, fauna colonize and start the process of leaf breakdown (Gessner et al, 1999;Graça, 2001;Tank et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Relationships of shredders, leaf processing and organic matter along a canopy cover gradient in tropical streams

2017

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Terrestrial allochthonous organic matter represents a structuring element and an important source of energy and carbon to fauna in small forested streams. However, the role of this matter as a food resource for benthic macroinvertebrates, and consequently, for shredders and their performance in riverine processes, is not clear in low-order tropical streams. Aiming to investigate the relationship between shredders and leaves, we analyzed along a gradient of 8-93% canopy cover biomass and abundance of shredders, accumulated leaves and breakdown rates of local leaves to verify if these parameters were related to shade conditions and to each other. Three hypotheses were tested: i) shredder biomass, accumulated leaves and breakdown rates are related to canopy cover and exhibit higher values in shaded sites; ii) shredder biomass is positively related to accumulated leaves and breakdown rates; and iii) due to the relatively large body size of the important shredders, the association of shredders with leaves and importance to leaf processing should be better expressed in terms of guild biomass than abundance. Shredder biomass varied between 846 and 1506 mg dry mass (DM) m -2 and accumulated leaves varied between 479 and 1120 g ash free dry mass (AFDM) m -2 across sites. Leaf breakdown rate (k), the only measured variable that varied significantly among sites, varied between -0.0015 and -0.0238 day -1 . Neither shredder biomass nor leaf biomass were associated with the shading gradient. On the other hand, shredder abundance and biomass, mainly represented by Triplectides (Trichoptera, Leptoceridae), was positively related to accumulated leaves within sites and to breakdown rates assessed by leaf packs. Leaf breakdown, as assessed by the experimental leaf packs, was associated with shredder biomass, but not with shredder abundance. This result suggests that macroinvertebrates are important for leaf detritus processing and that their biomass reflects their activity, presumably because it is related to their secondary production and perhaps non-consumptive action. Their activity was observed at the scale of leaf packs and not at the scale of variation in canopy cover because apparently canopy did not modulate availability of leaves, which were apparently not limiting to the shredders.

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“…The greatest spatial variability is expected at the within‐stream scale, owing to the high physical heterogeneity of habitats (Cooper, Barmuta, Sarnelle, Kratz, & Diehl, ; Palmer & Poff, ), which drives high within‐stream variation in macroinvertebrate communities (Boyero, ; Heino, Louhi, & Muotka, ) and litter breakdown (Tiegs, Akinwole, & Gessner, ; Tonin, Hepp, & Gonçalves, ). The greatest temporal variability is expected among seasons, given the marked temperature and rainfall seasonality of the Cerrado biome (Alvares et al, ), which can directly or indirectly influence litter dynamics (Bambi, Rezende, Feio, et al, ; Tonin et al, ). Litter accumulates in streams in the dry season because of lower breakdown, caused by lower temperature reducing microbial breakdown (Boyero et al, ; Follstad Shah et al, ), and reduced transport, due to lower discharge and associated physical breakdown (Fonseca, Bianchini, Pimenta, Soares, & Mangiavacchi, ; Johnson et al, ). The opposite occurs in the wet season, when most litter is lost due to higher breakdown and transport.…”

Section: Introductionmentioning

confidence: 99%

“…The greatest spatial variability is expected at the within-stream scale, owing to the high physical heterogeneity of habitats (Cooper, Barmuta, Sarnelle, Kratz, & Diehl, 1997;Palmer & Poff, 1997), which drives high within-stream variation in macroinvertebrate communities (Boyero, 2003;Heino, Louhi, & Muotka, 2004) and litter breakdown (Tiegs, Akinwole, & Gessner, 2009;Tonin, Hepp, & Gonçalves, 2018). The greatest temporal variability is expected among seasons, given the marked temperature and rainfall seasonality of the Cerrado biome (Alvares et al, 2013), which can directly or indirectly influence litter dynamics (Bambi, Rezende, Feio, et al, 2017;Tonin et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

High within‐stream replication is needed to predict litter fluxes in wet–dry tropical streams

et al. 2019

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Streams draining forested landscapes are fuelled by terrestrial plant litter, which can be transported downstream or retained and broken down locally. However, fluxes of plant litter in streams can vary at multiple spatio‐temporal scales, affecting the availability of this key resource in heterotrophic stream food webs. To explore this question we quantified several processes related to litter dynamics (i.e. litter inputs, storage, losses by transport and losses by breakdown) by sampling litter at multiple sites in three streams of the Brazilian Cerrado biome (which has a tropical wet–dry climate) for 2 years. We assessed the relative contribution of different spatial (among and within streams) and temporal scales (annual, seasonal and monthly) to total variability of these processes (hereafter fluxes). Spatial and temporal variability of fluxes were both high, but spatial variation was 1.67‐fold greater than temporal variation (61 versus 37%, respectively), especially at the within‐stream scale (50% overall); an exception was litterfall, which varied less spatially than temporally (24 versus 76%). Temporal variation of litter storage (and hence availability to consumers) was mostly seasonal and due to differences in net transport. Inputs and transport were higher in the wet than the dry season (wet versus dry season, 1.45 versus 0.92 and 1.43 versus 0.06 g litter m−2 day−1), while breakdown was similar between both seasons (0.88 versus 0.94 g litter m−2 day−1). Storage (i.e. accumulation) rate was positive and negative in the dry and wet season, respectively, indicating that litter was stored in the dry season and exported in the wet season. The transitional dry–wet season showed the highest inputs, breakdown and storage (3.21, 1.63 g litter m−2 day−1 and 145 g litter m−2), while the wet–dry season showed lower inputs (as in the dry season), higher transport (as in the wet season) and lower breakdown and storage than the other seasons (0.93, 0.65, 0.31 g litter m−2 day−1 and 24 g litter m−2). Our results underscore the role of variation in biophysical drivers of litter fluxes within streams (e.g. pool–riffle configuration, substrate features, biological communities), and suggest that high within‐stream replication is necessary to study litter fluxes at larger scales and over time. The seasonal patterns suggested potential changes in litter dynamics under future climate scenarios in the tropics, including increased storage due to reduced transport in a drier climate.

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Temporal and Spatial Patterns in Inputs and Stock of Organic Matter in Savannah Streams of Central Brazil

Cited by 42 publications

References 50 publications

Effect of leaf decomposition stage and water temperature on fragmentation activity of a shredder invertebrate species in lotic ecosystems

Effect of leaf decomposition stage and water temperature on fragmentation activity of a shredder invertebrate species in lotic ecosystems

Relationships of shredders, leaf processing and organic matter along a canopy cover gradient in tropical streams

High within‐stream replication is needed to predict litter fluxes in wet–dry tropical streams

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