Soil management to enhance bacterivore and fungivore nematode populations and their nitrogen mineralisation function

Ferris, H.; Venette, Robert C.; Scow, Kate M.

doi:10.1016/j.apsoil.2003.07.001

Cited by 204 publications

(102 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Higher SI values suggest a complex community structure with more linkages in the food web, greater resilience, and greater buffering of population (Ferris et al, 2001), which potentially provides more biological control to regulate or suppress plant parasitic nematodes (Berkemans et al, 2003). EI reflects the availability of resources to the soil food web and the response of primary decomposers to the resources (Ferris et al, 2004). Generally, the low values of EI reflects low abundance of Rhabditidae and dominance of Cephalobidae which is in full agreement with present findings, as EI values are low because of the dominance of Cephalobidae, and low abundance of Rhabditidae.…”

Section: Discussionmentioning

confidence: 99%

Food web diagnostics and functional diversity of soil inhabiting nematodes in a natural woodland

Tomar

Ahmad

2009

Helminthologia

View full text Add to dashboard Cite

Functional diversity and detritus soil food web of soil inhabiting nematodes in natural woodland dominated by Acacia nilotica L. was studied. Functional diversity was studied in terms of trophic groups assessed by Trophic diversity index (TDI) and Shannon-Weaver index (H′), while food web was diagnosed by channel index (CI). The plant parasitic channel was determined by plant parasitic index (PPI). The stability of the soil ecosystem was measured in terms of maturity index (MI), structure index (SI) and enrichment index (EI). Shannon-Weaver index of the area was recorded as 2.1 ± 0.3 while trophic diversity index 2.6 ± 0.7, maturity index (MI) 3.1 ± 0.2, channel index 62.4 ± 28.1 and structure and enrichment indices 68.1 ± 18.5 and 15.4 ± 13.7 respectively. A high degree of positive correlation was recorded between population of dorylaims and MI while some degree of negative correlation existed between population of plant parasitic nematodes and MI. Population of other nematodes showed a positive correlation with SI and EI. The faunal profile was found to be tilted towards quadrat C giving the idea of relatively undisturbed ecosystem with moderate enrichment and fungal decomposition channel.

show abstract

Section: Discussionmentioning

confidence: 99%

Food web diagnostics and functional diversity of soil inhabiting nematodes in a natural woodland

Tomar

Ahmad

2009

Helminthologia

View full text Add to dashboard Cite

show abstract

“…Although Ferris et al (2004) observed long-term positive and negative correlations between tomato yield and the EI and CI respectively, DuPont et al…”

Section: Ncp and Tomato Yieldmentioning

confidence: 99%

“…The combination of species of Criconemella, Helicotylenchus, Meloidogyne, Paratrichodorus, Pratylenchus, and Rotylenchus observed in our dataset are common to South African soils (Barbercheck and Von Broembsen, 1986;Marais and Swart, 2002). These nematodes were also described frequently in tomato production systems elsewhere in the world (Anwar et al, 2013;Briar et al, 2011;Bulluck et al, 2002;Cadet and Thioulouse, 1998;Ferris et al, 2004;Johnson and Campbell, 1980;. Several of these genera are known to form galls or gall-like symptoms on tomato roots (i.e., "stubby root"), an aspect that easily confound inexpert disease identification by producers and may lead to selection of cultivars with inappropriate disease resistance packages.…”

Section: Ncp and Tomato Yieldmentioning

confidence: 99%

“…Bacterivores increase when organic matter in the form of compost is applied (Briar et al, 2011;Zhao and Neher, 2013) or during intensive irrigation (Ferris et al 2004). In our study, the EI ranged from moderate to high, but the SI was always low -this was in agreement with several studies on tomato or vegetable production systems (Berkelmans et al, 2003;Briar et al, 2011;Bulluck et al, 2002;Ferris et al, 2004;Ugarte et al, 2013). The EI increases with soil disturbance (Liu et al, 2012) as soil microbes access organic matter exposed by tillage.…”

Section: Ncp and Land Use Changementioning

confidence: 99%

See 1 more Smart Citation

Nematode community profiling as a soil biology monitoring tool in support of sustainable tomato production: A case study from South Africa

Malherbe

Marais

2015

Applied Soil Ecology

View full text Add to dashboard Cite

Management of the biological component of agricultural soils is a vital aspect of sustainable food production systems. There is a need for soil biology metrics that producers can use as a decision support tool when it comes to managing the soil biological component of agricultural soils. We evaluated the usefulness of nematode community profiling as a soil biology monitoring tool in support of a sustainable commercial-scale tomato production system in South Africa. The objectives were to: 1) study the effects of land use change on nematode communities in the tomato production region, and 2) explore the correlation between tomato crop productivity and the nematode community metrics. The enrichment index was a sensitive indicator of land use change, but the structure index was not. Although the number and proportion of free-living and plant-parasitic nematodes increased and decreased respectively, the selective amplification of specific herbivorous genera was observed.Helicotylenchus spp. was sensitive to land use change and might serve as soil health indicator in this tomato production region. Regression analysis indicated a combination of variables associated with soil pH, free-living nematodes (notably the bacterivores) and specific plant-parasitic nematode genera (Paratrichodorus spp. and Rotylenchus spp.) predictedtomato yield (R 2 = 0.846). Despite the useful information gleaned from the nematode community metrics regarding soil food web functioning, the importance of ecologically and economically important nematode genera was re-emphasized. The results of this study highlight an important principle regarding development of soil health metrics for tomato agroecosystems: tomato crop health was not necessarily predicted solely by indicators of soil food web health and functioning.

show abstract

“…The c-p values describe the nematode life strategies, and range from 1 (colonizers, tolerant to disturbance) to 5 (persisters, sensitive to disturbance); (9) plant-parasite index (PPI) (Bongers, 1990); (10) maturity modification index (MMI), including plant-feeding nematodes (Yeates, 1994); (11) evenness (J'), J'=H'/ln(S), where S is the number of taxa (Yeates & King, 1997); (12) species richness, SR=(S-1)/ln(N), where S is the number of taxa and N is the number of individuals identified (Yeates & King, 1997); (13) basal index (BI) = 100  (b/(b + e + s)); (14) structure index (SI) = 100 x (s/(s + b)), where b = 0.8 x (Fu2+Ba2); s = 0.8 x Ca2 + 1.8 x Σ(X3) + 3.2 x Σ(X4) + 5.0 x Σ(X5); e = 3.2 x Ba1 + 0.8 x Fu2; and (15) enrichment index (EI) = 100 x (e/(e + b)) (Ferris et al, 2001;Hohberg, 2003;Ferris et al, 2004;Liang et al, 2005). All data were subjected to statistical analysis of variance using the SAS model (ANOVA, Duncan's multiple range test, and Pearson correlation coefficient) and were used to evaluate differences between separate means.…”

Section: Ecological Indices and Statistical Analysismentioning

confidence: 99%

Effect of sand-dune slope orientation on soil free-living nematode abundance and diversity

Pen-Mouratov

Hu²,

Hindin

et al. 2010

Helminthologia

View full text Add to dashboard Cite

179 SummaryThe spatial and temporal dynamics and composition of a soil free-living nematode community were studied in order to determine the impact of slope orientation on the community on the xeric south-and the mesic north-facing sand-dune slopes. A significant effect of sampling location on organic matter, total number of free-living nematodes, and trophic diversity was found. Although soil moisture had a significant effect on separate nematode trophic groups and on most of the applied ecological indices, no differences in soil moisture were observed between slopes. Organic matter was found to have a significant effect on the fungivore nematodes. The obtained results indicate that the south-facing slope is more favorable for the observed free-living nematodes than the other sampling sites. Twenty-four of the 77 nematode species that were found in the observed area showed dependence on dune slope orientation. The fungibacteria ratio, Simpson's dominance index, and basal index were useful tools for determining slope differences.

show abstract

Soil management to enhance bacterivore and fungivore nematode populations and their nitrogen mineralisation function

Cited by 204 publications

References 42 publications

Food web diagnostics and functional diversity of soil inhabiting nematodes in a natural woodland

Food web diagnostics and functional diversity of soil inhabiting nematodes in a natural woodland

Nematode community profiling as a soil biology monitoring tool in support of sustainable tomato production: A case study from South Africa

Effect of sand-dune slope orientation on soil free-living nematode abundance and diversity

Contact Info

Product

Resources

About