Community structure of soil nematodes under different drought conditions

Yan, Dengming; Yan, Denghua; Song, Xinshan; Yu, Zhiqing; Peng, Dou; Xu, Ting; Weng, Baisha

doi:10.1016/j.geoderma.2018.03.028

Cited by 45 publications

(18 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Increased soil organic matter and moisture along the elevation gradient (Fig. 1 ) had a negative impact on nematode abundance and diversity, although they are considered as positive drivers of their community 29 , 32 , 33 . Several reasons can be held responsible for shaping this pattern of nematode abundance and biodiversity: (1) more proportion of clay in soil at higher altitude reduce the porosity of soil and restrict the movement of nematodes.…”

Section: Discussionmentioning

confidence: 99%

Altitudinal gradient affect abundance, diversity and metabolic footprint of soil nematodes in Banihal-Pass of Pir-Panjal mountain range

Afzal

Nesar

Imran

et al. 2021

Sci Rep

View full text Add to dashboard Cite

Despite enormous diversity, abundance and their role in ecosystem processes, little is known about how community structures of soil-inhabiting nematodes differ across elevation gradient. For this, soil nematode communities were investigated along an elevation gradient of 1000–2500 masl across a temperate vegetation in Banihal-Pass of Pir-Panjal mountain range. We aimed to determine how the elevation gradient affect the nematode community structure, diversity and contribution to belowground carbon assimilation in the form of metabolic footprint. Our results showed that total nematode abundance and the abundance of different trophic groups (fungivores, herbivores and omnivores) declined with the increase of elevation. Shannon index, generic richness and evenness index indicated that nematode communities were more diverse at lower elevations and declined significantly with increase in elevation. Nematode community showed a pattern of decline in overall metabolic footprint with the increase of elevation. Nematode abundance and diversity proved to be more sensitive to elevation induced changes as more abundant and diverse nematode assemblage are supported at lower elevations. Overall it appears nematode abundance, diversity and contribution to belowground carbon cycling is stronger at lower elevations and gradually keep declining towards higher elevations under temperate vegetation cover in Banihal-pass of Pir-Panjal mountain range.

show abstract

Section: Discussionmentioning

confidence: 99%

Altitudinal gradient affect abundance, diversity and metabolic footprint of soil nematodes in Banihal-Pass of Pir-Panjal mountain range

Afzal

Nesar

Imran

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Furthermore, SEM results showed that genus richness of omnivores and predators was enhanced via increased shoot mass and soil organic carbon, indicating an indirect positive influence of plant species richness. As explained for nematode diversity, shoot mass, and thus denser vegetation can buffer adverse drought effects, which leads to a more stable microenvironment and enables a higher richness of large K-strategic omnivores and predators, as shown in Yan et al (2018). In addition to this, higher soil organic carbon could enhance the richness of omnivores and predators, either due to higher microbial biomass (as a resource for omnivores) and/or higher abundance of bacterial-feeding nematodes (as a resource for omnivores and predators).…”

Section: Plant Species Richness Effects On Trophic Groups Their Ratios and R-and K-strategistsmentioning

confidence: 97%

Effects of plant species diversity on nematode community composition and diversity in a long-term biodiversity experiment

et al. 2021

View full text Add to dashboard Cite

Diversity loss has been shown to change the soil community; however, little is known about long-term consequences and underlying mechanisms. Here, we investigated how nematode communities are affected by plant species richness and whether this is driven by resource quantity or quality in 15-year-old plant communities of a long-term grassland biodiversity experiment. We extracted nematodes from 93 experimental plots differing in plant species richness, and measured above- and belowground plant biomass production and soil organic carbon concentrations (Corg) as proxies for resource quantity, as well as C/Nleaf ratio and specific root length (SRL) as proxies for resource quality. We found that nematode community composition and diversity significantly differed among plant species richness levels. This was mostly due to positive plant diversity effects on the abundance and genus richness of bacterial-feeding, omnivorous, and predatory nematodes, which benefited from higher shoot mass and soil Corg in species-rich plant communities, suggesting control via resource quantity. In contrast, plant-feeding nematodes were negatively influenced by shoot mass, probably due to higher top–down control by predators, and were positively related to SRL and C/Nleaf, indicating control via resource quality. The decrease of the grazing pressure ratio (plant feeders per root mass) with plant species richness indicated a higher accumulation of plant-feeding nematodes in species-poor plant communities. Our results, therefore, support the hypothesis that soil-borne pathogens accumulate in low-diversity communities over time, while soil mutualists (bacterial-feeding, omnivorous, predatory nematodes) increase in abundance and richness in high-diversity plant communities, which may contribute to the widely-observed positive plant diversity–productivity relationship.

show abstract

“…However, a large-scale study along an aridity gradient showed that responses of nematode functional groups to increasing drought may be nonlinear, as fungivores and higher-trophic level nematodes were shown to be more sensitive to increasing drought than bacterivores [61]. Thereby, droughts may structurally alter nematode communities, reflected by changes in key nematode community indices as the maturity index and the channel index (Box 1) [62]. Drought thereby can alter the ratio between predatory and root-feeding nematodes [60,63], leading to reduced top-down control of root feeders, with possible negative effects for plant performance [27] (Figure 1).…”

Section: Global Change Impacts On Soil Nematode Communitiesmentioning

confidence: 99%

Nematodes as Drivers of Plant Performance in Natural Systems

Wilschut

Geisen

2021

Trends in Plant Science

115

View full text Add to dashboard Cite

This article is made publicly available in the institutional repository of Wageningen University and Research, under the terms of article 25fa of the Dutch Copyright Act, also known as the Amendment Taverne. This has been done with explicit consent by the author.Article 25fa states that the author of a short scientific work funded either wholly or partially by Dutch public funds is entitled to make that work publicly available for no consideration following a reasonable period of time after the work was first published, provided that clear reference is made to the source of the first publication of the work.This publication is distributed under The Association of Universities in the Netherlands (VSNU) 'Article 25fa implementation' project. In this project research outputs of researchers employed by Dutch Universities that comply with the legal requirements of Article 25fa of the Dutch Copyright Act are distributed online and free of cost or other barriers in institutional repositories. Research outputs are distributed six months after their first online publication in the original published version and with proper attribution to the source of the original publication.

show abstract

Community structure of soil nematodes under different drought conditions

Cited by 45 publications

References 29 publications

Altitudinal gradient affect abundance, diversity and metabolic footprint of soil nematodes in Banihal-Pass of Pir-Panjal mountain range

Altitudinal gradient affect abundance, diversity and metabolic footprint of soil nematodes in Banihal-Pass of Pir-Panjal mountain range

Effects of plant species diversity on nematode community composition and diversity in a long-term biodiversity experiment

Nematodes as Drivers of Plant Performance in Natural Systems

Contact Info

Product

Resources

About