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Profiling soil free-living nematodes in the Namib Desert, Namibia

Journal of Arid Land 2020年第1期12卷 130-143页

作者： Eugene MARAIS Gillian MAGGS-KÖLLING Chen SHERMAN Tirza DONIGER LIURentao Binu M TRIPATHI Yosef STEINBERGER Gobabeb Research and Training Centre Walvis BayGobabeb 953Namibia The Mina&Everard Goodman Faculty of Life Sciences Bar-Ilan University Ramat-Gan 5290002Israel Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China of Ministry of Education Ningxia UniversityYinchuan 750021China Korea Polar Research Institute Incheon 21990Korea

Functional structure and diversity of soil free-living nematodes in a desert environment depend on plant gender and sampling *** objective of this study was to compare the composition,abundance and tropic group of soil free-living nematodes in the upper 0–10 cm soil layer under the male and female Acanthosicyos horridus *** *** and in the inter-shrub open areas(control)in the Namib Desert,Namibia in April *** moisture,organic matter(OM)and pH was also ***-living nematodes were extracted from 100 g soil using the Baermann funnel procedure,and total number of nematodes was counted under a *** composition and diversity of soil free-living nematodes were analyzed using 18S rDNA *** indicated that a total of 67 groups,including 64 species,2 genera and 1 family were *** behavior of 58 species were identified as follows:15 bacteria-feeding species,12 fungi-feeding species,10 plant-parasite species,5 omnivorous-predator species,8 animal-parasite species,5 invertebrate-parasite species and 3 non-free-living nematodes,known as marine ***,soil free-living nematodes were found to be affected by sampling locations and plant gender,and community composition and density of these nematodes were strongly influenced by soil OM *** confirmed that spatial location and plant cover were main factors influencing the diversity of soil free-living ***,molecular tools were found to be very useful in defining the richness of soil non-free-living *** conclusion,the results elucidated the importance of biotic variables in determining the composition and abundance of soil free-living nematodes in the Namib Desert,Namibia.

关键词： plant gender plant cover nematodes trophic group diversity 18S rDNA

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