Abundance, diversity and connectance of soil food web channels along environmental gradients in an agricultural landscape

Sánchez‐Moreno, Sara; Ferris, H.; Young-Mathews, Anna; Culman, Steve W.; Jackson, Louise E.

doi:10.1016/j.soilbio.2011.07.016

Cited by 63 publications

(28 citation statements)

References 41 publications

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“…These results suggest that the higher WCS and the lower NO 3 --N in NT and RT can strengthen the trophic relationships of the bacterial and predator-prey pathways. Our observation was partially consistent with the findings of Culman et al (2010) and Sánchez-Moreno et al (2011), who found that NO 3 --N, an indicator of perturbation intensity, was negatively correlated with biological diversity.…”

Section: Effects Of Tillage On the Structure Of Soil Food Webssupporting

confidence: 92%

“…Connectance (C) is calculated as: C = L/S 2 , where L is the total number of feeding links in a pathway and S is the number of taxa in a pathway (Beckerman et al, 2006;Sánchez-Moreno et al, 2011). Little is known of how these soil organisms are linked; it is assumed that any organism in the resource group may be eaten by any organism in the consumer group (Sánchez-Moreno et al, 2011). Structural equation modeling (SEM) was used to investigate how trophic relationships respond to the conversion of CT to conservation tillage.…”

Section: Statistical Analysesmentioning

confidence: 99%

“…Tillage affects soil organisms by changing the soil physical environment and the food supply (Kladivko, 2001;Kladivko and Clapperton, 2011;Sánchez-Moreno et al, 2011). In conventional tillage (CT), soil communities typically consist of bacteria and herbivorous nematodes (Govaerts et al, 2006;Kuntz et al, 2013); whereas, the communities in conservation tillage support a high proportion of fungi and predatory nematodes (Minoshima et al, 2007;van Capelle et al, 2012;Zhang et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…To reveal the relationships between structure and functioning, three food web pathways were compartmented accounting for the main flux of C through the web: (1) the bacterial pathway, in which C flows from bacteria to their grazers (protozoa and bacterivorous nematodes); (2) the fungal pathway, in which C flows from fungi to fungivorous nematodes; and (3) the predator-prey pathway, in which C flows from nematode prey (protozoa, microbivorous and herbivorous nematodes) to nematode predators (Holtkamp et al, 2008;Sánchez-Moreno et al, 2011;de Vries et al, 2012). We hypothesize that (1) NT and RT, compared with CT, positively affect the components of the food webs, with the fungal-based decomposition pathway dominant; and (2) NT and RT increase the stability and strengthen the trophic relationship of the food webs.…”

Section: Introductionmentioning

confidence: 99%

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Conservation tillage positively influences the microflora and microfauna in the black soil of Northeast China

Zhang

Lü

et al. 2015

Soil and Tillage Research

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Section: Effects Of Tillage On the Structure Of Soil Food Webssupporting

confidence: 92%

Section: Statistical Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Conservation tillage positively influences the microflora and microfauna in the black soil of Northeast China

Zhang

Lü

et al. 2015

Soil and Tillage Research

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“…Also, in the present study, the negative correlation suggests soil nematode structure was affected by soil nutrient status. Soil nitrate content may be considered as a surrogate indicator of agricultural disturbance (Sánchez-Moreno et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Soil nematode responses to fertilization with ammonium nitrate after six years of unfertilized apple orchard

Azpilicueta¹,

Aruani

Chaves³

et al. 2014

Span. j. agric. res.

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A nematode community was used as a bioindicator of changes in agroecosystems caused by fertilization. The effect of applying nitrogen (N) fertilizer on a soil nematode community structure was studied in a soil which had not been fertilized for six years in the Rio Negro Valley, Argentina. Treatments were: i) 100 kg N ha-1 (N100); ii) 200 kg N ha-1 (N200); in each case 50% of the dosage was applied at the time of petal fall and 50% at fruit harvest in 2004/2005, 2005/2006, 2006/2007 growing seasons; and iii) control with no fertilizer (N0). Soil samples were collected in the 0 to 30 cm soil layer in October, November, April and July in each growing season. The number of bacterivores increased in N200 compared to N0. Cephalobidae were present in greater numbers in N200 than in N100 and N0. Predator abundance was lower under N200, after the first N application in each growing season. The ratio of fungivores to bacterivores (F/B) was 0.21, 0.3 and 0.41 in N200, N100 and N0, respectively. N200 resulted in a community with a lower maturity index (MI) than N0. Structure index (SI) was lower in N200 than N100 and N0. The enrichment index (EI) was less sensitive at detecting fertilizer effects. In November and April, soil nitrate concentrations were higher in N200 than in N100 and N0. Soil nitrate concentration was positively correlated with EI and negatively with MI, SI and F/B. N200 affected the trophic structure of the nematode community consistent with a less stable soil system.

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Long-term fertilization management affects the C utilization from crop residues by the soil micro-food web

et al. 2018

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show abstract

Abundance, diversity and connectance of soil food web channels along environmental gradients in an agricultural landscape

Cited by 63 publications

References 41 publications

Conservation tillage positively influences the microflora and microfauna in the black soil of Northeast China

Conservation tillage positively influences the microflora and microfauna in the black soil of Northeast China

Soil nematode responses to fertilization with ammonium nitrate after six years of unfertilized apple orchard

Long-term fertilization management affects the C utilization from crop residues by the soil micro-food web

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