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plant diversity promotes soil fungal pathogen richness under fertilization in an alpine meadow

Journal of plant Ecology 2021年第2期14卷 323-336页

作者： Xiang Liu Li Zhang Mengjiao Huang Shurong Zhou State Key Laboratory of Grassland Agro-Ecosystem Institute of Innovation EcologyLanzhou UniversityLanzhou 730000China Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering Coastal Ecosystems Research Station of the Yangtze River EstuaryInstitute of Biodiversity ScienceSchool of Life SciencesFudan UniversityShanghai 200438China Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental plants Ministry of EducationCollege of ForestryHainan UniversityHaikou 570228China

Aims The effects of fertilization on fungal plant pathogens in agricultural soils have been studied ***,we know little about how fertilization affects the relative abundance and richness of soil fungal plant pathogens in natural ecosystems,either through altering the soil properties or plant community *** Here,we used data from a 7-year nitrogen(N)addition experiment in an alpine meadow on the Qinghai-Tibetan Plateau to test how N addition affects the relative abundance and richness of soil fungal plant pathogens,as determined using Miseq sequencing of ITS1 gene *** also evaluated the relative importance of changes in soil properties versus plant species diversity under N *** Findings Using general linear model selection and a piecewise structural equation model,we found that N addition increased the relative abundance of soil fungal plant pathogens by significantly altering soil ***,higher host plant species richness led to higher soil fungal plant pathogen richness,even after excluding the effects of N *** conclude that the relative abundance and richness of soil fungal plant pathogens are regulated by different mechanisms in the alpine *** worldwide N inputs(through both fertilizer use and nitrogen deposition)not only cause species losses via altered plant species interactions,but also produce changes in soil properties that result in more abundant soil fungal plant *** increase in pathogen relative abundance may seriously threaten ecosystem health,thus interrupting important ecosystem functions and services.

关键词： alpine meadow dilution effect host–parasite diversity relationship nitrogen disease hypothesis plant–soil feedback

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Current plant diversity but not its soil legacy influences exotic plant invasion

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Journal of plant Ecology 2022年第3期15卷 639-649页

作者： Wei Xue Si-Mei Yao Lin Huang Sergio RRoiloa Bao-Ming Ji Fei-Hai Yu Institute of Wetland Ecology&Clone Ecology/Zhejiang Provincial Key Laboratory of Evolutionary Ecology and Conservation Taizhou UniversityTaizhou 318000China BioCost Group Biology DepartmentUniversidade da CoruñaA Coruña 15071Spain School of Grassland Science Beijing Forestry UniversityBeijing 100083China

Current plant diversity can influence exotic plant invasion,but it is unclear whether there is a legacy effect of plant diversity on exotic plant *** plant diversity can affect soil microbial communities and physio-chemical properties,which may cascade to impact subsequent exotic plant growth,we hypothesize that the soil legacy effect of plant diversity can influence exotic plant *** conducted a plant–soil feedback *** the conditioning phase,we trained soils by monocultures of 12 plant species from three functional groups(4 grasses,3 legumes and 5 forbs)and mixtures of 8 randomly selected species with all three functional groups from this 12-species *** the test phase,we grew the invasive plant Bidens pilosa with a co-occurring native grass(Arthraxon hispidus),with a co-occurring native forb(Pterocypsela indica)or with both in each type of the conditioned *** performance of *** relative to its native competitors varied depending on the functional type of both conditioning plant species in the conditioning phase and competing plant species in the test *** of the conditioning plants did not influence the growth difference between *** and its native ***,increasing diversity of the competing plant species reduced the performance of *** relative to its native *** results suggest that current plant diversity can reduce exotic plant invasion through increasing growth inequality between invasive and native plants,but the soil legacy effect of plant diversity may have little impact on exotic plant invasion.

关键词： Bidens pilosa competitive balance diversity effect invasive plant plant–soil feedback

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