scholarly journals Impact of crop management systems on soil nematode communities in South Brazil

2022 ◽  
Vol 79 (1) ◽  
Author(s):  
Andressa Cristina Zamboni Machado ◽  
Maurício Rumenos Guidetti Zagatto ◽  
Francisco Skora Neto ◽  
Santino Aleandro da Silva ◽  
Luiz Antonio Zanão Júnior
Keyword(s):  
Crop Management ◽  
Management Systems ◽  
Soil Nematode ◽  
Nematode Communities ◽  
Crop Management Systems ◽  
South Brazil ◽  
Soil Nematode Communities

Responses of soil nematode communities to agroecological crop management systems

Nematology ◽  
2012 ◽  
Vol 14 (2) ◽  
pp. 209-221 ◽  
Author(s):  
Débora Cristina Santiago ◽  
Giovani de Oliveira Arieira ◽  
Edinei de Almeida ◽  
Maria de Fátima Guimarães
Keyword(s):  
Trophic Structure ◽  
Biological Indicators ◽  
Management Systems ◽  
Soil Nematode ◽  
Canavalia Ensiformis ◽  
Nematode Communities ◽  
Plant Feeding ◽  
Nematode Diversity ◽  
Crop Management Systems ◽  
The Impact

Soil nematodes are sensitive to human intervention and widely used as biological indicators of disruptions and alterations in soil quality. The aim of this work was to identify nematodes that are good biological indicators in maize crops under different management systems, and to establish the impact levels of these systems. Soil samples were collected over a 3-year period at a depth of 0.0-0.3 m in areas under six different management systems for maize (Zea mays) monoculture, and intercropped maize and Canavalia ensiformis. Six areas of native vegetation were also assessed to provide a reference for ecological balance. After identification and counting, nematode communities were characterised according to abundance (total and relative), diversity (identified genera and diversity indexes), trophic structure and ecological maturity (disturbance indexes). Nematodes proved to be good ecological indicators, responding to the systems employed. Intercropping maize and Canavalia ensiformis in at least one assessment year reduced disruption and increased nematode diversity, which were both verified based on specific indexes. It was also observed that the maize monoculture increased disruption leading to a drop in nematode fauna diversity and an increase in the incidence of plant-feeding nematodes.

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

2011 ◽  
Vol 74 (7) ◽  
pp. 2002-2012 ◽  
Author(s):  
Sónia Chelinho ◽  
Klaus Dieter Sautter ◽  
Anabela Cachada ◽  
Isabel Abrantes ◽  
George Brown ◽  
...  
Keyword(s):  
Soil Nematode ◽  
Nematode Communities ◽  
Soil Nematode Communities

scholarly journals Soil nematode communities associated with hazelnut orchards in Turkey

2014 ◽  
Vol 6 (8) ◽  
pp. 112-121 ◽  
Author(s):  
Akyazi Faruk ◽  
Yildiz Senol ◽  
Firat Felek Anil
Keyword(s):  
Soil Nematode ◽  
Nematode Communities ◽  
Soil Nematode Communities

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

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.

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

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

Climate change and land use induce functional shifts in soil nematode communities

Oecologia ◽  
2019 ◽  
Vol 192 (1) ◽  
pp. 281-294 ◽  
Author(s):  
Julia Siebert ◽  
Marcel Ciobanu ◽  
Martin Schädler ◽  
Nico Eisenhauer
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Soil Nematode ◽  
Nematode Communities ◽  
Soil Nematode Communities
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