Soil nematode assemblages indicate the potential for biological regulation of pest species

Effects of synthetic fertilizer and farm compost on soil nematode community in long-term crop rotation plots: A morphological and metabarcoding approach

“…Nematodes are present in very high numbers in composts, and occur in distinct nematode communities that can be used to determine the biological maturity of a compost [24,25,53]. It was hypothesized by Steel et al [24] that the increase of certain taxa after compost amendment may at least partly be a direct effect of inoculation of compost nematodes, and that persisting predators may offer biocontrol potential [18,54]. In our study, metabarcoding has been used to trace, for the first time, unique compost nematode sequences in the soil after compost application.…”

“…Nematodes are present on all trophic levels, ranging from primary consumers to specialist predators [16]. In addition to being ubiquitous, nematodes react measurably to disturbances, and furthermore are easily allocated to trophic groups and identified into functional groups, making them ideal indicators for the soil food web [15,17,18]. Nematode-based weighted indices incorporate functional roles and life history strategies, and as such provide information about the nematode community structure in stressed, enriched, stable, structured and decomposition environments, and provide important information on the dynamics of soil food webs [19][20][21].…”

Isolation and characterization of Streptomyces species against vancomycin resistant enterococcus (VRE) from agricultural soils of Qom, Iran

“…Soil ecosystem functioning is of topics in ecological and agricultural studies (Steel & Ferris 2016). Researches have shown that plant composition, soil properties, and microclimates cause changes in composition and structure of nematode populations among soil ecosystems (Neher 2010).…”

“…Also, their generation time is longer than that of the metabolically-active microbes, making them more temporally stable rather than fl uctuating with ephemeral nutrient fl ushes (Nannipieri et al 1990) . Furthermore, nematodes have been widely used as indicators of soil biodiversity and functioning and as indicators of environmental disturbances (Bongers & Ferris 1999;Neher Vafa, Saeedizadeh andBostani 2001, Ferris et al 2001;Yeates 2003Ferris & Tuomisto 2015Steel & Ferris 2016) .…”

“…In this regard, Carrascosa et al 2014reported a positive and signifi cant relationship between soil suppressiveness, soil food web structure and nematode diversity. Suppression of pest and disease organisms is an ecosystem service that is the outcome of the ecosystem function of biological population regulation (Brussaard 2012, Steel & Ferris 2016 .…”