Elevated Aluminium Concentration in Acidified Headwater Streams Lowers Aquatic Hyphomycete Diversity and Impairs Leaf-Litter Breakdown

Baudoin, Jean-Marc; Guérold, François; Felten, Vincent; Chauvet, Éric; Wagner, Philippe; Rousselle, Philippe

doi:10.1007/s00248-007-9344-9

Cited by 57 publications

(47 citation statements)

References 68 publications

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“…The leaf breakdown rates for the two species were similar to those found for other species in tropical regions (Gonç alves et al, 2006;Chara et al, 2007;Moretti et al, 2007) but lower compared to studies in temperate zones (Braatne et al, 2007;Baudoin et al, 2008;Abelho, 2009). The highest breakdown rates found in streams of temperate ecosystems may be related to lower concentrations of recalcitrant compounds in the detritus (Ardón et al, 2009).…”

Section: Breakdown Rates and Characteristics Of Leaf Detritussupporting

confidence: 61%

Small leaf breakdown in a Savannah headwater stream

et al. 2015

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Please cite this article in press as: Alvim, E.A.C.C., et al., Small leaf breakdown in a Savannah headwater stream. Limnologica (2014), http://dx. a b s t r a c tThe chemical nature and nutritional quality of leaves influence microbial colonization, microbial activity and consequently leaf breakdown rates. In the present study, we compared the decomposition of Baccharis concinna and Baccharis dracunculifolia leaves and the influence of leaf quality on the microbial activity during the decomposition process. This investigation was conducted in a Brazilian savanna headwater stream with a riparian zone composed predominantly of herbaceous and shrubs. The breakdown coefficient was higher in B. dracunculifolia than in B. concinna; for both species, increases in leaf mass were observed after the 60th day. The secondary compounds were quickly leached in the first seven days, but the structural compounds persisted longer and served as the main carbon source for the detritus-associated microorganisms. The highest values of ergosterol were observed in the final stages of leaf breakdown and indicated the difficulty of colonization on the detritus; these values were related to the increase in leaf mass. The ATP content increased without corresponding increase in ergosterol content, suggesting a biofilm formation during leaf breakdown. These results indicated that the total microbial biomass can assimilate organic compounds released from detritus by the enzymatic action of fungi, demonstrating the importance of this group for releasing the energy stored in small leaves.

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Section: Breakdown Rates and Characteristics Of Leaf Detritussupporting

confidence: 61%

Small leaf breakdown in a Savannah headwater stream

et al. 2015

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“…The absence of this relationship is often explained by the high ecological redundancy of this group [14,43]. On the other hand, positive relationships have already been observed under laboratory controlled conditions [20,24,44] and in some studies carried out in natural systems [35], usually when comparing reference streams with highly impaired systems [7,21,41], where both taxa richness and ecosystem functioning are dramatically reduced. Our results indicate that, even under reference oligotrophic conditions, aquatic hyphomycete richness enhances leaf processing.…”

Section: Aquatic Hyphomycete Community Variability and Leaf Litter Prmentioning

confidence: 88%

Aquatic Hyphomycete Communities Associated with Decomposing Alder Leaf Litter in Reference Headwater Streams of the Basque Country (northern Spain)

2012

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The community of aquatic hyphomycetes associated with decomposing alder leaf litter was studied during autumn-winter in nine headwater reference streams of the Basque Country (northern Spain). In order to study the spatial variability in composition and community structure, three streams from each of three different river basins were compared. The colonization dynamics and community changes throughout the decomposition process were also followed in three of the rivers (one per basin). The taxonomic richness and community structure of these fungi varied among rivers, including similar streams of a given watershed. However, neither species diversity nor total abundance was statistically related to environmental variables. Only the conidial production of two of the species, Flagellospora curvula and Lunulospora curvula appeared to be enhanced by nitrate availability in the water. The taxonomic richness and the reproductive activity (sporulation rate) were positively related to the leaf litter decomposition rate. The changes in conidial production along the process were similar for all the streams and helped explain leaf litter quality dynamics.

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“…A strong correlation has been observed between water acidity and density, diversity and biochemical activity of aquatic hyphomycetes and the litter decomposition rate (Baudoin et al 2008). Fungal diversity was smaller at lower pH (pH = 4.3).…”

Section: Introductionmentioning

confidence: 91%

Effects of some abiotic factors on the occurrence of aquatic mycobiota in lakes of the Drawa National Park

Mazurkiewicz-Zapalowicz

Silicki

Gregorczyk

et al. 2012

Oceanological and Hydrobiological Studies

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Effects of environmental factors, including acidity, temperature, oxygen, nitrogen, phosphate and total iron content, on the diversity of aquatic mycobiota in lake water were studied in two lakes in Northern Poland in [2005][2006][2007]. Fifty four species of fungi and fungus-like organisms were recorded in the subsurface and benthic of both lakes. There were 36 and 45 species in Lakes Marta and Sitno, respectively. The greatest species diversity was observed with a higher content of oxygen and biogenic compounds in the surface water. Temperature and oxygen content were the most important factors affecting the distribution of mycobiota in lake water.

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Elevated Aluminium Concentration in Acidified Headwater Streams Lowers Aquatic Hyphomycete Diversity and Impairs Leaf-Litter Breakdown

Cited by 57 publications

References 68 publications

Small leaf breakdown in a Savannah headwater stream

Small leaf breakdown in a Savannah headwater stream

Aquatic Hyphomycete Communities Associated with Decomposing Alder Leaf Litter in Reference Headwater Streams of the Basque Country (northern Spain)

Effects of some abiotic factors on the occurrence of aquatic mycobiota in lakes of the Drawa National Park

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