Soil nematode assemblages in an acid soil as affected by lime application

Liming can affect soil biota through alterations in soil pH and soil structure. Many earlier studies monitored the responses of soil nematode communities to lime application but they did not come to a consensus and did not use indices of soil nematode community and multivariate statistical approaches developed over the past two decades. The present research explored the short-term effects of lime application on soil nematode communities in an acrisol in three Eucalyptus plantations in southern China. Nematodes were sampled from control and lime-treated plots at three periods from October 2011 to February 2012 at 0-10 cm and 10-20 cm soil depths. Repeated measures ANOVA showed that lime application significantly reduced the abundance of herbivores at 10-20 cm depth during the study. Lime application tended to increase the bacterivore index at 0-10 cm depth over time. Principal response curves of soil nematode community structure, in terms of nematode trophic group composition, revealed that the differences between control and lime application treatments increased over time, primarily because of the decline of fungivores in plots treated with lime. The decline in fungivores resulted mainly from declines of Filenchus and Ditylenchus. The results suggest that the fungal-mediated decomposition channel in the soil food web was suppressed by lime application. Our study also demonstrated that the sensitivity of different nematode genera to lime application varied widely, even for genera within the same trophic group. In particular, the abundance of several bacterivorous genera (Prismatolaimus, Plectus, Wilsonema, Protorhabditis, Diploscapter and Heterocephalobus) gradually declined and that of Rhabditonema at 0-10 cm depth gradually increased following lime application during the study; two herbivorous genera, Trophotylenchulus and Helicotylenchus, had opposite responses to lime application at 0-10 cm depth. Integrating univariate statistical approaches with multivariate approaches facilitated the analysis of soil nematode responses to lime application.

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Soil nematode community changes associated with windfall and wildfire in forest soil at the High Tatras National Park, Slovak Republic

Helminthologia ◽

10.2478/s11687-009-0024-9 ◽

2009 ◽

Vol 46 (2) ◽

pp. 123-130 ◽

Cited By ~ 18

Author(s):

A. Čerevková ◽

M. Renčo

Keyword(s):

National Park ◽

Slovak Republic ◽

Trophic Group ◽

Forest Stand ◽

Soil Nematode ◽

Nematode Communities ◽

Soil Nematode Community ◽

Research Findings ◽

Community Changes ◽

The High Tatras

AbstractThe paper presents research findings on the influence of windfall and wildfire on nematode communities in Lariceto-Piceetum forest in the High Tatras in Slovakia. Comparison was made of an intact (REF), affected and extracted (EXT), non-extracted (NEX) and burnt (FIR) forest stand. A total of 55 species belonging to 36 genera were found. The EXT locality harboured the majority of the identified species, but the highest abundance of nematodes was observed in the FIR locality. Bacterial feeders were the dominant trophic group in all investigated plots. In the REF bacterial feeders were followed by root-fungal feeders, fungal feeders and omnivores, in the EXT by omnivores and plant parasites, in the FIR by omnivores and root-fungal feeders and in the NEX by fungal feeders and omnivores. The MI and SI were higher in the REF and the EXT compared to those in the FIR and the NEX, the highest B/F ratio was observed in the FIR and the highest EI was found in the REF. We can conclude that disturbance of forest vegetation and soil has had a clear and demonstrable impact on nematode communities.

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Distribution of nematodes in wetland soils with difference distance from the Bohai sea 359–366

Plant Soil and Environment ◽

10.17221/417-pse ◽

2008 ◽

Vol 54 (No. 8) ◽

pp. 359-366 ◽

Cited By ~ 6

Author(s):

H.Y. Wu ◽

X.X. Li ◽

L.B. Shi ◽

Z.H. Wang ◽

F.Y. Ma

Keyword(s):

Community Structure ◽

Bohai Sea ◽

Coastal Wetland ◽

Yellow River ◽

Nematode Community ◽

Soil Nematode ◽

Soil Nematodes ◽

Nematode Communities ◽

Plant Parasitism ◽

Soil Nematode Communities

In order to elucidate the distribution of soil nematodes in coastal wetlands and the effect of different distance from the sea line on soil nematode communities, we investigated the community structure of soil nematodes in one wetland perpendicularly oriented from Bohai sea coastline. In June 2006, soil samples were collected from the Yellow River Delta wetlands, in Dongying city of Shandong Province, China. Soil nematode communities were analyzed at the depths of 0–10 and 10–20 cm. The results showed that plant parasite nematodes were the most abundant trophic groups in both depths and at four sites. The average relative abundance was 91.33% of the nematode community. Several ecological indices which reflected soil nematode community structure, diversity, maturity and plant parasitism were compared in these four sites. The results indicated that the maturity index (MI) and plant parasitism index (PPI) were more sensitive than the other indices for assessing the response of soil nematode communities to soil of coastal wetland.

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Dynamics of Soil Nematode Communities Revealed Significant Variation in Greenhouse with Different Continuous Cropping Years

10.1101/593541 ◽

2019 ◽

Cited By ~ 1

Author(s):

Xueliang Tian ◽

Xiaoman Zhao ◽

Zhenchuan Mao ◽

Bingyan Xie

Keyword(s):

Relative Abundance ◽

Significant Variation ◽

Growing Season ◽

Continuous Cropping ◽

Soil Nematode ◽

Root Knot Nematode ◽

Dominant Group ◽

Nematode Communities ◽

Soil Nematode Community ◽

Soil Nematode Communities

AbstractContinuous cropping usually resulted in a series of soil problems, especially root knot nematode disaster in greenhouse because of imbalance in soil nematode community. However, the dynamic change in soil nematode community in greenhouse with various continuous cropping years during plant growing season is unclear. Here, soil nematode communities in greenhouse after 2 and 10 years of continuous cropping were comparatively analyzed using 18S rDNA high-throughput sequencing to reveal the changing processes in soil nematode communities. Compared to the 2-year greenhouse, soil in the 10-year greenhouse showed soil acidification, nutrients accumulation, salinization. In term of α-diversity, Bacterial-feeding nematodes (BF) were dominant in the 2-year greenhouse over the whole growing season, but plant-parasitic nematodes (PP) became the dominant group in the 10-year greenhouse in the late growing season.Meloidogynegradually became the dominant group (Relative abundance 70.9%) in the 10-year greenhouse, whileRhabditidae(Relative abundance from 99.8% to 26.8%) was the predominant members in the 2-year greenhouse. For β-diversity, hierarchical clustering analysis, unWeighted UniFrac principal component analysis (PCA) and principal co-ordinates analysis (PCoA) all revealed that soil nematode communities in the two types of greenhouses exhibited significant differences. Redundancy analysis (RDA) showed that soil nematode communities in the 10-year greenhouse were related to high soil organic material, total nitrogen, electrical conductivity and disease index of root knot nematode. Fisher’ exact test and Pearson correlation coefficients revealed thatMeloidogynecaused main differences in soil nematode communities between the two types of greenhouses. Meanwhile, population dynamics ofMeloidogynewere divided into dormant phase, low-level increasing phase and exponential phase during the whole season. In total, the significant variation led different dynamics of soil nematode communities in the 2-year and 10-year greenhouse.

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Seasonal Stabilities of Soil Nematode Communities and Their Relationships with Environmental Factors in Different Temperate Forest Types on the Chinese Loess Plateau

Forests ◽

10.3390/f12020246 ◽

2021 ◽

Vol 12 (2) ◽

pp. 246

Author(s):

Na Huo ◽

Shiwei Zhao ◽

Jinghua Huang ◽

Dezhou Geng ◽

Nan Wang ◽

...

Keyword(s):

Food Web ◽

Loess Plateau ◽

Soil Nematode ◽

Soil Food Web ◽

Food Web Structure ◽

Nematode Communities ◽

Web Structure ◽

Soil Nematode Community ◽

Nematode Abundance ◽

Soil Nematode Communities

The bottom-up effects of vegetation have been documented to be strong drivers of the soil food web structure and functioning in temperate forests. However, how the forest type affects the stability of the soil food web is not well known. In the Ziwuling forest region of the Loess Plateau, we selected three typical forests, Pinus tabuliformis Carrière (PT), Betula platyphylla Sukaczev (BP), and Quercus liaotungensis Koidz. (QL), to investigate the soil nematode community characteristics in the dry (April) and rainy (August) season, and analyzed their relationships with the soil properties. The results showed that the characteristics of the soil nematode communities and their seasonal variations differed markedly among the forest types. Compared to P. tabuliformis (PT), the B. platyphylla (BP) and Q. liaotungensis (QL) forests had higher plant diversity and more easily decomposed litters, which were more effective for improving the soil resource availability, thus, leading to more beneficial effects on the soil nematode community. In both the dry and rainy season, the soil nematode abundance was the highest in the BP forest. The Shannon–Wiener diversity index (H’), Pielou’s evenness index (J’), and nematode channel ratio index (NCR) were higher, while the Simpson dominance index (λ) and plant parasite index (PPI) were lower, in the BP and QL forests compared with in the PT forest. From the dry to rainy season, the total nematode abundance and the abundance of fungivores, bacterivores, and omnivore-predators, significantly increased in the QL and PT forests, and the values of the Wasilewska index (WI), maturity index (MI), H’, J’, λ, and NCR showed the most significant seasonal variability in the PT forest, which were mainly driven by changes in the soil labile C and N and the moisture content between the two seasons. Generally, the seasonal stability of the soil nematode communities was the highest in the BP forest and the poorest in the PT forest, probably due to variations in the plant diversity. Our results suggest the importance of tree species and diversity as bottom-up regulating factors of the soil food web structure, function, and seasonal stability, which has important implications for sustainable forest management in the Loess Plateau and other temperate regions.

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Soil nematode communities as indicators of soil health in different land use types in tropical area

Nematology ◽

10.1163/15685411-00003325 ◽

2020 ◽

Vol 22 (6) ◽

pp. 595-610 ◽

Cited By ~ 2

Author(s):

Dandan Gao ◽

Faming Wang ◽

Jian Li ◽

Shiqin Yu ◽

Zhian Li ◽

...

Keyword(s):

Land Use ◽

Soil Health ◽

Trophic Group ◽

Health Conditions ◽

Soil Nematode ◽

Nematode Communities ◽

Land Use Types ◽

Bare Land ◽

Managed Ecosystems ◽

Soil Nematode Communities

Summary The study of soil nematode communities is a powerful tool that has been widely used as an indicator of soil health. This study explored whether soil nematode composition of different land use types could be used as a baseline to indicate the soil health of both natural and anthropogenic ecosystems. The soil nematode community compositions were documented for five land use types in tropical China: bare land, secondary forest, old forest, eucalyptus plantation and litchi orchards. The first three land use types are natural ecosystems and considered as a vegetation succession, whereas the other two are anthropogenically managed ecosystems. The vegetation succession from bare land to secondary and old forests increased soil nematode abundance, diversity, diversity-weighted abundance and complexity of community structure. During the wet season, the abundances of the total nematodes, bacterivores, fungivores and herbivores were significantly lower in eucalyptus plantation and litchi orchards than in secondary and old forests, but higher than in bare land. During the dry season, the abundances of the total nematodes and each trophic group were greatest in orchards. The pattern of the diversity-weighted abundance of each nematode trophic group was similar to that of nematode trophic group abundance. The results indicate that soil nematode communities of different land use types could be used for comparison of soil health conditions in natural and managed ecosystems. Particularly, the soil health conditions as indicated through nematode communities of the two managed ecosystems were not as good as those of secondary and old forests, whereas litchi orchards might have better soil health conditions than eucalyptus plantations in tropical China.

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Considerable impacts of litter inputs on soil nematode community composition in a young Acacia crassicapa plantation

Soil Ecology Letters ◽

10.1007/s42832-021-0085-3 ◽

2021 ◽

Author(s):

Cancan Zhao ◽

Yin Li ◽

Chenlu Zhang ◽

Yuan Miao ◽

Mengzhou Liu ◽

...

Keyword(s):

Community Composition ◽

Nematode Community ◽

Soil Nematode ◽

Soil Nematode Community

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

Scientific Reports ◽

10.1038/s41598-021-95651-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Shahid Afzal ◽

Humira Nesar ◽

Zarrin Imran ◽

Wasim Ahmad

Keyword(s):

Elevation Gradient ◽

Carbon Assimilation ◽

Shannon Index ◽

Nematode Community ◽

Mountain Range ◽

Soil Nematode ◽

Nematode Communities ◽

Nematode Abundance ◽

Belowground Carbon ◽

Abundance And Diversity

AbstractDespite 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.

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