Spatial variations of chemical composition, microbial functional diversity, and enzyme activities in a Mediterranean litter (Quercus ilex L.) profile

Alarcón-Gutiérrez, Enrique; Floch, Carine; Augur, Christopher; Petit, Jérémy; Ziarelli, Fabio; Criquet, Stéven

doi:10.1016/j.pedobi.2009.01.002

Cited by 39 publications

(16 citation statements)

References 65 publications

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“…It is known (e.g. Alarcón-Gutiérrez et al, 2009) that the litter under the evergreen and sclerophyllous Q. ilex has a very slow decomposition rate resulting in thick, complex and structured humus, which increases the soil binding capability for essential and nonessential trace elements. Table 4 Average percentage of grain-size fractions, pH values and organic matter concentrations (OM; %) in soil samples collected in the urban and control Holm-Oak grove (in bracket data from the extra urban stand …”

Section: Discussionmentioning

confidence: 99%

Holm Oak (Quercus ilex L.) canopy as interceptor of airborne trace elements and their accumulation in the litter and topsoil

Fantozzi

Monaci

Blanuša

et al. 2013

Environmental Pollution

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Section: Discussionmentioning

confidence: 99%

Holm Oak (Quercus ilex L.) canopy as interceptor of airborne trace elements and their accumulation in the litter and topsoil

Fantozzi

Monaci

Blanuša

et al. 2013

Environmental Pollution

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“…between different species of trees that comprise the deciduous forest) may be important, as qualitative data we collected using canopy pictures over the pools suggest that the main sources of leaf litter into cluster E1 and F1 pools were Acer trees, which are relatively easily decomposed, while the canopy trees over cluster E2 and F2 pools contained higher numbers of Fraxinus, Quercus, Platanus, and Populus leaves (data not shown). Thus, in landscape-scale studies, the vegetation at a more local scale cannot be ignored, as litter quality can affect both community structure as well as ecosystem function (Alarcón-Gutiérrez et al 2009, Kotilainen et al 2009, Ndaw et al 2009). Our observation that the majority of OTU sequences were saprotrophic fungi, which are involved in the decomposition of allochthonous leaf litter into vernal pools, provides further support that litter quality and local environmental factors are important for vernal pool microbial community structure.…”

Section: Discussionmentioning

confidence: 99%

Changes in eukaryotic microbial communities of vernal pools along an urban–rural land use gradient

Carrino‐Kyker¹,

Swanson²,

Burke³

2011

Aquat. Microb. Ecol.

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Urban-rural gradients are important ecological settings to investigate how human land use impacts habitats and, indirectly, inherent organisms. Seasonally flooded vernal pools are common throughout temperate forest landscapes and may represent significant sites of forest nutrient cycling. The effects of urbanization on vernal pool microbial communities, important drivers of nutrient cycling, are largely unknown; thus studies to improve our understanding of microbes and their functional roles in these habitats are needed. Eukaryotic microbial communities sampled from 30 vernal pools of the Cuyahoga River watershed (USA), located along a gradient of urban land use, were profiled with denaturing gradient gel electrophoresis, and were compared between pools using nonmetric multidimensional scaling (NMS). Microbial diversity, and, specifically, the richness and diversity of the fungal operational taxonomic units (OTUs), increased with urbanization. Vernal pool eukaryotic microorganisms formed 2 NMS clusters that differed significantly in sub-watershed urban area. However, the significance of urbanization disappeared when fungal and algal communities were analyzed separately. Water conductivity was consistently correlated with different microbial communities (e.g. eukaryotic, fungal, and algal). Fungal communities also appeared related to the carbon content of the substrate, indicating that vegetation at a local scale may be important for community structure. Almost half of the OTUs matched fungal species, which provides taxonomic evidence that the eukaryotic microbial communities of vernal pools are dominated by fungal species. Overall, our data suggest that the eukaryotic microbes of vernal pools are influenced by a variety of factors of the surrounding landscape, including urbanization, water chemistry, and vegetation type.

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“…[52] The metabolic activity of microorganisms is mediated by enzymes, and enzyme synthesis is partly controlled by soil moisture. [53] High moisture content can result in a partially anaerobic environment in soil [54,55], thus restraining activity of soil fauna and microorganisms. Thus the straw in the flower bed with low moisture surroundings was quickly broken down.…”

Section: Effects Of Soil Physicochemical Properties On Decomposition mentioning

confidence: 99%

The variability and causes of organic carbon retention ability of different agricultural straw types returned to soil

Wang

Zhang

et al. 2016

Environmental Technology

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Retaining the organic carbon (C) content of agricultural straw when returned to soil is restricted by rapid decomposition. In order to clarify the difference in returned straw decomposition and the causes, and to develop a straw returning mode with high-efficiency of organic C accumulation, the decomposition processes of corn, soybean, rice and wheat straws were systematically studied in fields. When returned in situ (the original planting area), the C in soybean straw was decomposed most quickly with a decomposition constant of 0.00542 d, but wheat straw showed a longer retention in soil with 0.00303 d. However, for ex situ return of all straw in one area away from in situ return, soybean straw was decomposed most slowly (0.00452 d) and wheat straw more quickly (0.00652 d). The sequence of C decomposition rate in 270 d was soybean > corn > rice > wheat (in situ) and corn > wheat > rice > soybean (ex situ). Both surrounding soil and straw nature were important factors influencing the decomposition rate. The farmland with rice and wheat rotation retained more C from returned straws due to its high moisture and low nitrogen (N) content, while the soybean field was a contrast. Soybean straw had a low decomposition rate after ex situ return due to its low N content and high C/N ratio. The farmland of wheat-rice rotation combined with soybean straw ex situ return may develop into a field of higher C retention ability.

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Spatial variations of chemical composition, microbial functional diversity, and enzyme activities in a Mediterranean litter (Quercus ilex L.) profile

Cited by 39 publications

References 65 publications

Holm Oak (Quercus ilex L.) canopy as interceptor of airborne trace elements and their accumulation in the litter and topsoil

Holm Oak (Quercus ilex L.) canopy as interceptor of airborne trace elements and their accumulation in the litter and topsoil

Changes in eukaryotic microbial communities of vernal pools along an urban–rural land use gradient

The variability and causes of organic carbon retention ability of different agricultural straw types returned to soil

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