Linking invertebrate communities to decomposition rate and nitrogen availability in pine forest soils

Neher, Deborah A.; Weicht, Thomas R.; Barbercheck, Mary E.

doi:10.1016/j.apsoil.2011.12.001

Cited by 84 publications

(28 citation statements)

References 52 publications

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“…Neher et al (1995Neher et al ( , 1998Neher et al ( , 2012 tested nematode community indices across spatial scales, quantified their linkage to ecosystem function and suggested the use of nematode community indices for large-scale (regional and/or national) soil monitoring programs.…”

Section: Introductionmentioning

confidence: 99%

Temperature-based bioclimatic parameters can predict nematode metabolic footprints

2015

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Nematode metabolic footprints (MFs) refer to the lifetime amount of metabolized carbon per individual, indicating a connection to soil food web functions and eventually to processes supporting ecosystem services. Estimating and managing these at a convenient scale requires information upscaling from the soil sample to the landscape level. We explore the feasibility of predicting nematode MFs from temperature-based bioclimatic parameters across a landscape. We assume that temperature effects are reflected in MFs, since temperature variations determine life processes ranging from enzyme activities to community structure. We use microclimate data recorded for 1 year from sites differing by orientation, altitude and vegetation cover. At the same sites we estimate MFs for each nematode trophic group. Our models show that bioclimatic parameters, specifically those accounting for temporal variations in temperature and extremities, predict most of the variation in nematode MFs. Higher fungivorous and lower bacterivorous nematode MFs are predicted for sites with high seasonality and low isothermality (sites of low vegetation, mostly at low altitudes), indicating differences in the relative contribution of the corresponding food web channels to the metabolism of carbon across the landscape. Higher plant-parasitic MFs were predicted for sites with high seasonality. The fitted models provide realistic predictions of unknown cases within the range of the predictor's values, allowing for the interpolation of MFs within the sampled region. We conclude that upscaling of the bioindication potential of nematode communities is feasible and can provide new perspectives not only in the field of soil ecology but other research areas as well.

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Section: Introductionmentioning

confidence: 99%

Temperature-based bioclimatic parameters can predict nematode metabolic footprints

2015

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“…Higher values of total nitrogen in the pine forest than in the farm soil might be partially related to higher micro and mesofauna abundances, since it has been shown that nematode excre tion, for example, contributes significantly to soluble soil nitrogen (Ekschmitt et al, 1999). Moreover, abundances of bacterial-and fungal-feeding nematodes are often pos itively correlated with the amount of NH4 + excreted into the soil (de Ruiter et al, 1993;Neher et al, 2012) and were, in this experiment, the most abundant nematode taxa in both types of soil. Also, despite the organic mat ter incorporated into the farm soil at the beginning of the cropping season in the form of manure, both organic mat ter content and the ratio C:N were lower in the farm than in the pine forest soil, probably due to the low capacity of agricultural soils to retain carbon in complex soil car bon forms.…”

mentioning

confidence: 97%

Effects of organic and conventional pesticides on plant biomass, nematode diversity and the structure of the soil food web

Carrascosa

Sánchez‐Moreno

Alonso‐Prados

2015

Nematol

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Due to the uncertain future of the soil fumigants most commonly used in the EU, there is a need to develop new integrated pest management programmes to control crop diseases. Different nematode management practices, such as solarisation and the use of ecological nematicides, including nematophagous fungi, are used to control populations of plant-parasitic nematodes, one of the most common pests affecting crops. The objective of this study was to determine the effects of organic (neem seed paste and a mixture of nematophagous fungi) and conventional (oxamyl and fenamiphos) nematicides on soil physical chemical properties, soil biodiversity and plant biomass. Such effects were investigated in two types of habitats: low diversity soils from an agricultural farm and high diversity soils from a natural vegetation area. The greater effect was observed with the neem treatment, which induced a large boost of dauer juveniles in the nutrient-depleted soil, while the same treatment induced an increase of populations of less opportunistic, generalist bacterivore nematodes in the pine forest soil, rich in organic matter. We have studied the effects of different biological and chemical nematicides on the whole soil nematode community through ecological indices and their relationship with plant biomass, but further research is needed to improve understanding of the effect of these products on nematode assemblages.

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“…On the other hand, this result highlights the importance of organic matter content in soil for the development of microarthropod communities. As revealed by Neher et al (2012), soil microfauna depends on the decomposition of organic residues and on the available nitrogen. Our results also showed a dominance of mites in the most contaminated areas, up to 100 m around the industrial site, where this group represented between 52 and 93% of microarthropod density.…”

Section: Distribution Of Microarthropod Groups With Respect To Soil Pmentioning

confidence: 99%

Ecological changes in historically polluted soils: Metal(loid) bioaccumulation in microarthropods and their impact on community structure

Austruy¹,

Laplanche

Mombo

et al. 2016

Geoderma

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 15976 a b s t r a c tSoil pollution by persistent metal(loid)s present environmental and sanitary risks. While the effects of metal(loid)s on vegetation and macrofauna have been widely studied, their impact on microarthropods (millimetre scale) and their bioaccumulation capacity have been less investigated. However, microarthropods provide important ecosystem services, contributing in particular to soil organic matter dynamics. This study focussed on the impact of metal(loid) pollution on the structure and distribution of microarthropod communities and their potential to bioaccumulate lead (Pb). Soil samples were collected from a contaminated historical site with a strong horizontal and vertical gradient of Pb concentrations. Microarthropods were extracted using the Berlese method. The field experiments showed that microarthropods were present even in extremely polluted soils (30,000 mg Pb kg −1 ). However, while microarthropod abundance increased with increasing soil C/N content (R 2 = 0.79), richness decreased with increasing pollution. A shift in the community structure from an oribatid-to a springtail-dominated community was observed in less polluted soils (R 2 = 0.68). In addition, Pb bioamplification occurred in microarthropods, with higher Pb concentrations in predators than in detritivorous microarthropods. Finally, the importance of feeding and reproductive ecological traits as potentially relevant descriptors of springtail community structures was highlighted. This study demonstrates the interest of microarthropod communities with different trophic levels and ecological features for evaluating the global environmental impact of metal(loid) pollution on soil biological quality.

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Linking invertebrate communities to decomposition rate and nitrogen availability in pine forest soils

Cited by 84 publications

References 52 publications

Temperature-based bioclimatic parameters can predict nematode metabolic footprints

Temperature-based bioclimatic parameters can predict nematode metabolic footprints

Effects of organic and conventional pesticides on plant biomass, nematode diversity and the structure of the soil food web

Ecological changes in historically polluted soils: Metal(loid) bioaccumulation in microarthropods and their impact on community structure

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