Status of soil nematode communities during natural regeneration of a subtropical forest in southwestern China

Forest recovery has been extensively evaluated using plant communities but fewer studies have been conducted on soil fauna. This study reports the status of soil nematode communities during natural re-establishment after deforestation in a subtropical forest in southwestern China. Soil nematode communities of two secondary succession stages, shrub-grassland and secondary forest, were compared with those of virgin forest. Shrub-grassland had higher herbivore relative abundance but lower fungivore and bacterivore relative abundance than forests. Between secondary and virgin forest, the latter had higher abundance of bacterivores. Shrub-grassland had lower nematode diversity, generic richness, maturity index and trophic diversity index than virgin forest, whereas there were no differences in these indices between secondary forest and virgin forest. The small differences in nematode community structures between secondary forest and virgin forest suggest that soil nematode communities recovered to a level close to that of the undisturbed forest after up to 50 years of natural succession.

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Long-term effects of a wildfire on the soil nematode communities in the spruce forest ecosystem of High Tatra National Park

International Journal of Wildland Fire ◽

10.1071/wf14138 ◽

2015 ◽

Vol 24 (5) ◽

pp. 702 ◽

Cited By ~ 7

Author(s):

Marek Renčo ◽

Andrea Čerevková

Keyword(s):

Forest Ecosystem ◽

Diversity Index ◽

Control Plot ◽

Parasitic Nematodes ◽

Soil Nematode ◽

Spruce Forest ◽

Long Term Effects ◽

Species Diversity Index ◽

Nematode Communities ◽

Soil Nematode Communities

This study evaluated the effect of a wildfire on soil nematode communities in the spruce forest ecosystem of the High Tatra Mountains 8 years after the fire. Two plots were established, an intact control plot (REF) and a fire-damaged plot after a windstorm (FIR). A total of 20 representative soil samples were collected; 10 from each site (five in June and five in October). A total of 64 species of nematodes were recorded. The mean number of species 8 years after the fire ranged from 24 to 36 and was always significantly higher in REF than in FIR (P < 0.05); with a significantly higher Shannon–Weaver diversity index in REF. Bacterivores were the most abundant trophic group at both sites. Omnivores were more abundant in FIR than in REF, and predators were more abundant in REF. The most abundant species at both sites were Acrobeloides nanus, Aglenchus agricola, Malenchus exiguus and Paratylenchus microdorus. Epidermal or root-hair feeders, mainly Malenchus exiguus, were the most abundant plant-parasitic nematodes at both sites, followed by the ectoparasitic P. microdorus. The migratory endoparasite, Pratylenchus pratensis, was found only in FIR in relatively high numbers, whereas the ectoparasitic species Criconemoides morgensis, Crossonema menzeli and Ogma cobbi occupied only REF. Nematode abundance and species diversity index differed significantly between the disturbed and undisturbed habitats, but ecological and functional indices and metabolic footprints indicate that the soil ecosystem 8 years after the fire had recovered, with moderate levels of nutrient enrichment comparable to those of the control plot.

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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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Carbofuran effects in soil nematode communities: Using trait and taxonomic based approaches

Ecotoxicology and Environmental Safety ◽

10.1016/j.ecoenv.2011.07.015 ◽

2011 ◽

Vol 74 (7) ◽

pp. 2002-2012 ◽

Cited By ~ 22

Author(s):

Sónia Chelinho ◽

Klaus Dieter Sautter ◽

Anabela Cachada ◽

Isabel Abrantes ◽

George Brown ◽

...

Keyword(s):

Soil Nematode ◽

Nematode Communities ◽

Soil Nematode Communities

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Soil nematode communities associated with hazelnut orchards in Turkey

Journal of Entomology and Nematology ◽

10.5897/jen2014.0104 ◽

2014 ◽

Vol 6 (8) ◽

pp. 112-121 ◽

Cited By ~ 1

Author(s):

Akyazi Faruk ◽

Yildiz Senol ◽

Firat Felek Anil

Keyword(s):

Soil Nematode ◽

Nematode Communities ◽

Soil Nematode Communities

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Application of PCR-DGGE method for identification of nematode communities in pepper growing soil

Journal of Vietnamese Environment ◽

10.13141/jve.vol7.no1.pp9-14 ◽

2016 ◽

Vol 7 (1) ◽

pp. 9-14

Author(s):

Duong Duc Hieu

Keyword(s):

Maximum Likelihood ◽

Community Sample ◽

Nematode Species ◽

Viet Nam ◽

Soil Nematode ◽

Nematode Communities ◽

Maximum Likelihood Tree ◽

Relationship Of ◽

First Time ◽

Soil Nematode Communities

Soil nematodes play an important role in indication for assessing soil environments and ecosystems. Previous studies of nematode community analyses based on molecular identification have shown to be useful for assessing soil environments. Here we applied PCR-DGGE method for molecular analysisoffive soil nematode communities (designed as S1 to S5) collected from four provinces in Southeastern Vietnam (Binh Duong, Ba Ria Vung Tau, Binh Phuoc and Dong Nai) based on SSU gene. By sequencing DNA bands derived from S5 community sample, our data show 15 species containing soil nematode, other nematode and non-nematode (fungi) species. Genus Meloidogyne was found as abundant one. The genetic relationship of soil nematode species in S5 community were determined by Maximum Likelihood tree re-construction based on SSU gene. This molecular approach is applied for the first time in Vietnam for identification of soil nematode communities. Tuyến trùng đất đóng vai trò chỉ thị quan trọng trong công tác đánh giá môi trường và hệ sinh thái đất. Các nghiên cứu trước đây đã cho thấy lợi ích của việc phân tích cộng đồng tuyến trùng đất bằng định danh sinh học phân tử đối với việc đánh giá môi trường đất. Ở đây, chúng tôi ứng dụng phương pháp PCR-DGGE dựa trên gene SSU để phân tích năm (ký hiệu từ S1 đến S5) cộng đồng tuyến trùng đất thuộc các vùng trồng chuyên canh cây hồ tiêu ở miền nam Việt Nam (Bình Dương, Bà Rịa Vũng Tàu, Bình Phước và Đồng Nai). Bằng cách giải trình tự các vạch của mẫu tuyến trùng S5, kết quả cho thấy cộng đồng tuyến trùng này có 15 loài gồm nhóm tuyến trùng đất, nhóm các loại tuyến trùng khác và nhóm không phải tuyến trùng (nấm) và trong đó Meloidogyne là giống ưu thế. Mối quan hệ di truyền của các các loài tuyến trùng đất thuộc cộng đồng S5 được xác định bằng việc thiết lập cây phát sinh loài Maximum Likelihood dựa trên gene SSU. Đây là nghiên cứu đầu tiên ở Việt Nam sử dụng kỹ thuật PCR-DGGE để phân tích các cộng đồng tuyến trùng đất trồng hồ tiêu.

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Neotyphodium impacts on soil nematode communities: rhizosphere- and litter-mediated interactions

NZGA: Research and Practice Series ◽

10.33584/rps.13.2006.3098 ◽

2007 ◽

Vol 13 ◽

pp. 107-110

Author(s):

M. Omacini ◽

E.J. Chaneton ◽

C.M. Ghersa

Keyword(s):

Plant Traits ◽

Lolium Multiflorum ◽

Fungal Endophytes ◽

Patch Dynamics ◽

Trophic Levels ◽

Soil Nematode ◽

Patch Occupancy ◽

Nematode Communities ◽

Endophyte Infection ◽

Soil Nematode Communities

There is a growing recognition that endophyte effects on host plant traits may be propagated through food chains. We studied Neotyphodium occultans effects on soil nematode communities mediated by current and past patch occupancy by endophyteinfected Lolium multiflorum populations. A microcosm experiment was performed to evaluate whether abundance and diversity of nematodes at different trophic levels were affected by endophyte infection through rhizosphere-mediated or littermediated effects. We found that presence of endophyte-infected plants and their aerial litter both triggered a bottom-up trophic cascade enhancing the abundance of herbivorous and predaceous nematode taxa. Endophyte infection also increased overall nematode richness, mostly through changes induced at the highest trophic level in this soil food web. Our results suggest that fungal endophytes can modify the linkages between aboveand belowground community compartments, with potential consequences on plant patch dynamics. Keywords: soil food webs, Lolium multiflorum, Neotyphodium occultans, plant-soil feedback, after-life effects, indirect interactions, trophic cascades

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