The impact of fertilization intensity on soil nematode communities in a Tibetan Plateau grassland ecosystem

Abstract The main goal of this study was to evaluate the impact of the invasive common milkweed (Asclepias syriaca L.) on soil nematode communities. The research was carried out in 2018 and 2019 in an ecosystem of permanent grassland in the basin of the Laborec River in land registries of Drahňov, a Vojany village in southeastern Slovakia. The ecosystem contained a total of 64 species of free-living and parasitic nematodes. The most prevalent trophic groups were bacterial feeders (Acrobeloides nanus), followed by plant parasites (Helicotylenchus digonicus and Pratylenchus pratensis), fungal feeders (Aphelenchus avenae), and omnivores (Eudorylaimus carteri). The number of nematode species, the composition of trophic groups and the structure of communities in areas with invasive plants were similar to those in areas with native vegetation during the two years of observation.

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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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Plants and Microbes Mediate the Shift in Ecosystem Multifunctionality From Low to High Patterns Across Alpine Grasslands on the Tibetan Plateau

Frontiers in Plant Science ◽

10.3389/fpls.2021.760599 ◽

2021 ◽

Vol 12 ◽

Author(s):

Yi Wang ◽

Miao Liu ◽

Youchao Chen ◽

Tao Zeng ◽

Xuyang Lu ◽

...

Keyword(s):

Tibetan Plateau ◽

Correlation Coefficients ◽

Terrestrial Ecosystems ◽

Alpine Grassland ◽

Future Climate Change ◽

The Tibetan Plateau ◽

Grassland Ecosystem ◽

The Impact ◽

Ecosystem Multifunctionality ◽

Alpine Grassland Ecosystem

Both plant communities and soil microbes have been reported to be correlated with ecosystem multifunctionality (EMF) in terrestrial ecosystems. However, the process and mechanism of aboveground and belowground communities on different EMF patterns are not clear. In order to explore different response patterns and mechanisms of EMF, we divided EMF into low (<0) and high patterns (>0). We found that there were contrasting patterns of low and high EMF in the alpine grassland ecosystem on the Tibetan Plateau. Specifically, compared with low EMF, environmental factors showed higher sensitivity to high EMF. Soil properties are critical factors that mediate the impact of community functions on low EMF based on the change of partial correlation coefficients from 0 to 0.24. In addition, plant community functions and microbial biomass may mediate the shift of EMF from low to high patterns through the driving role of climate across the alpine grassland ecosystem. Our findings will be vital to clarify the mechanism for the stability properties of grassland communities and ecosystems under ongoing and future climate change.

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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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