Response of soil nematode community composition and diversity to different crop rotations and tillage in the tropics

Zhong, Shuang; Zeng, Huicai; Jin, Zhiqiang

doi:10.1016/j.apsoil.2016.05.013

Cited by 17 publications

(5 citation statements)

References 48 publications

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“…The tillage treatments negatively impacted the abundance of Aporcelaimellus, Clarkus , Dorylaimida, and Tripyla , resulting in the decline of predators and omnivores. The sensitivity of Aporcelaimellus to tillage was previously reported in the agricultural ecosystem by Zhong et al . (2016 , 2017 ).…”

Section: Discussionsupporting

confidence: 68%

“…The higher value of efoot in the control treatment indicated higher productivity and turnover rates of the r-strategists and adequate resources ( Vonk et al ., 2013 ; Ito et al ., 2015 ; Zhang et al ., 2015 ; Zhong et al ., 2017 ). Similarly, tillage drastically reduced the values of sfoot, which indicates the decrease in metabolic activity of both predators and omnivores in R2M and R2W treatments ( Zhong et al ., 2016 ).…”

Section: Discussionmentioning

confidence: 97%

“…On the other hand, the removal of surface litter did not affect the MI value. This indicates a lower abundance and diversity of higher c-p class nematodes in tillage treatments due to heightened levels of physical disturbances ( Djigal et al ., 2012 ; Grabau and Chen, 2016 ; Zhong et al ., 2016 ; Zhong et al ., 2017 ). However, tillage did not significantly affect PPI values as the abundance of plant feeders was not affected much in the tillage treatments.…”

Section: Discussionmentioning

confidence: 99%

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Increasing Levels of Physical Disturbance Affect Soil Nematode Community Composition in a Previously Undisturbed Ecosystem

Pothula

Phillips

Bernard

2022

Journal of Nematology

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Soil is essential for the sustenance of life. Diverse soil organisms support several biological processes such as organic matter decomposition, mineralization, nutrient cycling, and controlling pests and diseases. Among multicellular soil organisms, nematodes are ubiquitous, functionally diverse, and abundant. Notably, agricultural practices have diverse impacts on plants, soils, and soil organisms. Tillage affects nematodes directly by altering pore size and disrupting the continuity of water films and indirectly by affecting the lower trophic groups such as bacteria and fungi. The primary goal of this study was to examine the effect of increasing levels of physical disturbance on nematode communities in an undisturbed forest ecosystem. The experiment included four treatments: control with no disturbance, surface litter removed with no litter and no vegetation, tilling the soil with a rototiller every 2 mon, and every 2 wk. Tillage significantly reduced the overall abundance and overall richness of nematode communities over time. Among nematode trophic groups, tillage significantly reduced the abundance and richness of bacterial feeders, predators, and omnivores over time. The abundance and richness of c-p 2, c-p 4, and c-p 5 class nematodes were significantly decreased by tillage. Unlike tillage, minimal disturbance such as removal of surface litter resulted in a significant decrease in the abundance of only three genera: Acrobeles, Aporcelaimellus, and Boleodorus. Nonmetric multidimensional scaling analysis revealed that nematodes of higher c-p classes such as Dorylaimida, Aporcelaimellus, Alaimus, Clarkus, and Tripyla were sensitive to physical disturbances. Bacterial feeders belonging to the c-p 2 class such as Tylocephalus, Acrobeles, Ceratoplectus, Plectus, and Pseudacrobeles were significantly reduced by tillage. Moreover, tillage significantly reduced the functional metabolic footprint of nematodes, which indicates decreased metabolic activity, reduced C inflow, and poorly structured soil food webs. Previous studies conducted in agricultural ecosystems determined that Clarkus, Filenchus, and Plectus were tolerant to tillage; however, they were found sensitive to tillage in our study. Overall, our study suggests that increasing levels of physical disturbance are detrimental to nematode community abundance and diversity that could affect soil ecosystem stability and sustainability.

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Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Increasing Levels of Physical Disturbance Affect Soil Nematode Community Composition in a Previously Undisturbed Ecosystem

Pothula

Phillips

Bernard

2022

Journal of Nematology

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“…A lower enrichment index than observed in the Ugandan banana plantations was reported for soil nematodes associated with dessert banana monoculture plantations in both Australia ( Pattison et al, 2008 ) and Hainan Island, China ( Zhong et al, 2016 ) based on morphological assessments. The structural index was also lower for the data collected from China compared to Uganda.…”

Section: Discussionmentioning

confidence: 62%

Next-generation sequencing of the soil nematode community enables the sustainability of banana plantations to be monitored

Bell

Namaganda

Urwin

et al. 2021

Applied Soil Ecology

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Uganda faces a considerable challenge to match its food production to an annual population growth rate of 3%. Cooking bananas are the country's most produced staple crop but the annual national harvest is not increasing. The crop grows on infertile soils that are normally fertilised organically and often susceptible to erosion. Soil nematodes are well-established as bioindicators of soil quality that can support environmental monitoring and assessment of the sustainability of agricultural systems. These invertebrates are a highly ranked indicator of biodiversity with molecular approaches available. Consequently, we have applied next-generation DNA sequencing of soil nematodes to evaluate soil quality of Ugandan banana plantations. The aim is to establish a method for constructing an aspect of an environmental biosafety dossier with the future aim of assessing the impact of transgenic crops and improving current cropping systems. The soil samples did not differ significantly in any of the measured soil chemistry factors, soil texture or percentage of organic matter. Thirty taxons of soil nematodes other than the plant parasites were recovered from soil supporting nine banana plantations plus three each from coffee and banana-coffee interplants from East and West Uganda. Cluster analysis correctly allocated each plantation to the crop/intercrop being grown when based on the abundance of taxa rather than taxa presence or absence. This indicates that the host has considerable effects on the abundance of specific nematode species within the soil. Overall, nematodes were more abundant in soil from coffee plantations than from banana-coffee interplants with the lowest values being from fields supporting just banana. Only the basal and trophic diversity indices and the percentage of nematodes that are rapid colonisers varied between the three plantation types. The soil of all fifteen plantations can be classified as having a mature soil web condition with low physical disturbance, limited chemical stressors, moderately high nutrient enrichment and balanced decomposition channels.

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“…Continuous strawberry cropping reduces nematode diversity, the predominant decomposition pathway changing from bacterial to fungal as NCR decreases, whereas plantfeeder abundance increases significantly, showing that the soil may be harmful to plant growth under continuous cropping [33] . When banana is rotated with papaya, pineapple or rice, the abundance and functional metabolic footprint of bacterivores, fungivores and omnivore-carnivores were found to increase [34] . Maize-soybean rotation is an agricultural practice in which soybean cyst nematode, Heterodera glycines, is effectively controlled [29,35] .…”

Section: Soil Nematode Community and Diversity Changes Follow Soil Comentioning

confidence: 99%

A review of soil nematodes as biological indicators for the assessment of soil health

Liu

Wang

et al. 2020

Front. Agr. Sci. Eng.

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Healthy soils are essential for sustainable agricultural development and soil health requires careful assessment with increasing societal concern over environmentally friendly agricultural development. Soil health is the capacity of soil to function within ecological boundaries to sustain productivity, maintain environmental quality, and promote plant and animal health. Physical, chemical and biological indicators are used to evaluate soil health; the biological indicators include microbes, protozoa and metazoa. Nematodes are the most abundant metazoa and they vary in their sensitivity to pollutants and environmental disturbance. Soil nematode communities are useful biological indicators of soil health, with community characteristics such as abundance, diversity, community structure and metabolic footprint all closely correlated with the soil environment. The community size, complexity and structure reflect the condition of the soil. Both free-living and plant-parasitic nematodes are effective ecological indicators, contributing to nutrient cycling and having important roles as primary, secondary and tertiary consumers in food webs. Tillage inversion, cropping patterns and nutrient management may have strong effects on soil nematodes, with changes in soil nematode communities reflecting soil disturbance. Some free-living nematodes serve as biological models to test soil condition in the laboratory and because of these advantages soil nematodes are increasingly being used as biological indicators of soil health.

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Response of soil nematode community composition and diversity to different crop rotations and tillage in the tropics

Cited by 17 publications

References 48 publications

Increasing Levels of Physical Disturbance Affect Soil Nematode Community Composition in a Previously Undisturbed Ecosystem

Increasing Levels of Physical Disturbance Affect Soil Nematode Community Composition in a Previously Undisturbed Ecosystem

Next-generation sequencing of the soil nematode community enables the sustainability of banana plantations to be monitored

A review of soil nematodes as biological indicators for the assessment of soil health

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