Leaf breakdown in a natural open tropical stream

Alvim, Elisa Araújo Cunha Carvalho; Medeiros, Adriana O.; Rezende, Renan de Souza; Júnior, José Francisco Gonçalves

doi:10.4081/jlimnol.2014.982

Cited by 19 publications

(17 citation statements)

References 58 publications

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“…The terrestrial-aquatic linkages are well known, the most plausible cause for this being the research on allochthonous resource use (mainly terrestrial leaves and terrestrial invertebrates) by organisms inhabiting stream food webs (Nakano et al, 1999a;Nakano and Murakami, 2001;Alvim et al, 2015;Fenoglio et al, 2015). In fact, inputs of terrestrial invertebrates from riparian canopy cover may represent an important food resource for stream-dwelling fish species (Kawaguchi and Nakano, 2001;Utz and Hartman, 2007;Syrjänen et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Ontogenetic shifts in terrestrial reliance of stream-dwelling brown trout

Sánchez‐Hernández

Cobo

2016

J Limnol

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Section: Introductionmentioning

confidence: 99%

Ontogenetic shifts in terrestrial reliance of stream-dwelling brown trout

Sánchez‐Hernández

Cobo

2016

J Limnol

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“…Abundance of shredders, scrapers, filtering collectors, and predators were lower in litter bags from the afforested stream whereas gathering collectors showed higher abundance. Similarly, low abundance of shredders and high abundance of gathering collectors were found in breakdown experiments with low quality leaf litter of native plants in Brazilian Cerrado streams (Alvim, Medeiros, & Rezende, ; Ligeiro, Moretti, & Callisto, ; Moretti, Ligeiro, & Callisto, ). This colonization pattern seems characteristic of regions where the original set of shredder species is poor (França, Medeiros, Rosa, & Callisto, ; Ligeiro et al, ; Tomanova et al, ).…”

Section: Discussionmentioning

confidence: 79%

Pine needle litter acts as habitat but not as food source for stream invertebrates

Márquez

Príncipe

Martina

et al. 2017

Internat Rev Hydrobiol

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Small streams are ruled by the influence that riparian vegetation has on food webs since it regulates the entry of organic matter and sunlight. The plantation of perennial tree species along banks of grassland streams results in heavy shading of stream bottoms and large inputs of coarse organic matter. In this study, we experimentally analyzed the taxonomic and trophic structure of invertebrate assemblages colonizing pine needles and plastic filaments (mimicking the physical structure of needle accumulations) placed in one afforested and one natural grassland stream from the mountainous region of central Argentina. We studied these two experimental substrates to infer if pine leaves were colonized by invertebrates as food resource or only as a substratum for support and refuge. Coarse mesh litter bags were used to simulate large litter accumulations and four bags of each treatment were randomly removed after 46, 89, and 158 days of exposure. Our study showed that taxonomic and trophic composition of invertebrate assemblages colonizing needles and plastic filaments were mostly similar suggesting that needles constitute mainly a stable habitat but not a trophic subsidy. Richness, diversity, and evenness were lower in assemblages of the afforested stream and differences in taxonomic and trophic structure were also found between afforested and natural grassland streams. We conclude that environmental changes associated to afforestation modified invertebrate assemblages colonizing litter but in the same way for needles and plastic filaments since no evidence was found for supporting that the organic nature of needles makes this substrate different from plastic filaments for invertebrates. Therefore, needles would not be being used as a food resource. Our study highlights the importance of preserving riparian zones mostly unaltered to maintain natural aquatic communities when implementing afforestation programes in grassland landscapes. K E Y W O R D Saquatic insects, functional feeding groups, invertebrate colonization, organic matter, pine needles

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“…; Alvim et al . ). In the present study, the fit to the biphasic kinetic model indicates the presence of labile and refractory compounds in leaves and branches.…”

Section: Discussionmentioning

confidence: 97%

The effect of hydrostatic pressure on the decomposition of inundated terrestrial plant detritus of different quality in simulated reservoir formation

et al. 2016

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The formation of reservoirs usually incorporates the inundation of terrestrial vegetation in the basin. The decomposition of organic matter from the flooded vegetation may have several implications for reservoir functioning, including eutrophication and dissolved oxygen depletion. The hydrostatic pressure increases with depth in a reservoir, and its influence on the decomposition process has not previously been evaluated. This study was undertaken to evaluate the decomposition of terrestrial plant detritus of different qualities (leaves and branches) under different hydrostatic pressure conditions. Detritus were placed separately in glass bottles in the laboratory and incubated in tight stainless steel pressure vessels, simulating three different depths (surface, 30 and 100 m). The masses (mg) of particulate organic carbon (POC), dissolved organic carbon (DOC) and inorganic carbon (IC) were determined for the 4 months of the detritus decomposition simulated in this study. The mass values were transformed in percentages of the initial detritus carbon. The results of temporal variations of the compounds studied were fitted to a first-order biphasic decay model. The hydrostatic pressure exhibited no significant effects on litter decomposition. On the other hand, the detritus chemical composition (i.e. the presence of labile and refractory compounds) was the determining factor for the decomposition curve shape and for the differences observed between the leaves and branches. The greatest POC loss from leaves, and resulting larger DOC mass, indicated the leaves were more labile than the branches. The results also indicated the branches are the main detritus remaining in a reservoir over time.

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Leaf breakdown in a natural open tropical stream

Abstract: ABSTRACT

Cited by 19 publications

References 58 publications

Ontogenetic shifts in terrestrial reliance of stream-dwelling brown trout

Ontogenetic shifts in terrestrial reliance of stream-dwelling brown trout

Pine needle litter acts as habitat but not as food source for stream invertebrates

The effect of hydrostatic pressure on the decomposition of inundated terrestrial plant detritus of different quality in simulated reservoir formation

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