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Li L, Luo Z, Nian L, Li L, Niu Y, Prasath BB, Haider FU, Zhang Y, He R, Liu J. Response of soil nematode community structure and metabolic footprint to nitrogen addition in alfalfa fields on the Loess Plateau. Sci Rep 2024; 14:17640. [PMID: 39085380 PMCID: PMC11292004 DOI: 10.1038/s41598-024-68393-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Accepted: 07/23/2024] [Indexed: 08/02/2024] Open
Abstract
Nematodes serve as key indicators of soil health in ecological studies. Therefore, the current study examined the community structure and metabolic footprint of soil nematodes in alfalfa fields across varying levels of N supply in the semi-arid Loess Plateau. The findings offer theoretical guidance for the sustainable management of artificial alfalfa grasslands in this region. The research was based on alfalfa fields with different N application rates (0, 50, 100, 150 kg/ha2) as the research object, The shallow plate method was used to separate and extract soil nematodes, identify soil nematode groups, calculate ecological function index and metabolic footprint, and identify indicator species. A total of 6346 nematodes were isolated in this study, belonging to 27 genera and 19 families. Notably, the plant parasitic nematode Helicotylenchus was predominant. As N addition increased, the plant parasitic index (PPI) increased significantly. A N50 application significantly enhanced the soil nematode diversity index ( H ) and the free-living index (MI). The findings showcased a noticeable decrease in disturbance within the N50 soil nematode community. This resulted in a mature and stable community structure primarily attributed to the heightened abundance of omnivorous/predatory nematodes. Across various N levels, soil nematode communities underwent significant alterations in the soil food web structure through shifts in their metabolic footprint. Future strategies should focus on refining N management practices and integrating sustainable approaches like crop rotation and pest management. These efforts will contribute to guidelines ensuring artificial alfalfa grasslands lasting health and productivity.
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Affiliation(s)
- Liangliang Li
- Grassland Science College, Gansu Agricultural University, Lanzhou, 730070, China
| | - Zhuzhu Luo
- Grassland Science College, Gansu Agricultural University, Lanzhou, 730070, China.
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, China.
- State Key Laboratory of Arid Habitat Crop Science, Lanzhou, 730070, China.
| | - Lili Nian
- College of Forestry, Gansu Agricultural University, Lanzhou, 730070, China
| | - Lingling Li
- State Key Laboratory of Arid Habitat Crop Science, Lanzhou, 730070, China
| | - Yining Niu
- State Key Laboratory of Arid Habitat Crop Science, Lanzhou, 730070, China
| | - Barathan Balaji Prasath
- Marine and Coastal Ecology Division, Gujarat Institute of Desert Ecology, Bhuj, 370001, India
| | - Fasih Ullah Haider
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, 510650, China
| | - Yaoquan Zhang
- College of Forestry, Gansu Agricultural University, Lanzhou, 730070, China
| | - Renyuan He
- College of Forestry, Gansu Agricultural University, Lanzhou, 730070, China
| | - Jiahe Liu
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, 730070, China
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Afzal S, Nesar H, Imran Z, Ahmad W. Altitudinal gradient affect abundance, diversity and metabolic footprint of soil nematodes in Banihal-Pass of Pir-Panjal mountain range. Sci Rep 2021; 11:16214. [PMID: 34376745 PMCID: PMC8355321 DOI: 10.1038/s41598-021-95651-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 07/22/2021] [Indexed: 11/24/2022] Open
Abstract
Despite enormous diversity, abundance and their role in ecosystem processes, little is known about how community structures of soil-inhabiting nematodes differ across elevation gradient. For this, soil nematode communities were investigated along an elevation gradient of 1000-2500 masl across a temperate vegetation in Banihal-Pass of Pir-Panjal mountain range. We aimed to determine how the elevation gradient affect the nematode community structure, diversity and contribution to belowground carbon assimilation in the form of metabolic footprint. Our results showed that total nematode abundance and the abundance of different trophic groups (fungivores, herbivores and omnivores) declined with the increase of elevation. Shannon index, generic richness and evenness index indicated that nematode communities were more diverse at lower elevations and declined significantly with increase in elevation. Nematode community showed a pattern of decline in overall metabolic footprint with the increase of elevation. Nematode abundance and diversity proved to be more sensitive to elevation induced changes as more abundant and diverse nematode assemblage are supported at lower elevations. Overall it appears nematode abundance, diversity and contribution to belowground carbon cycling is stronger at lower elevations and gradually keep declining towards higher elevations under temperate vegetation cover in Banihal-pass of Pir-Panjal mountain range.
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Affiliation(s)
- Shahid Afzal
- Nematode Biodiversity Research Lab, Department of Zoology, Aligarh Muslim University, Aligarh, 202002, India
| | - Humira Nesar
- Nematode Biodiversity Research Lab, Department of Zoology, Aligarh Muslim University, Aligarh, 202002, India
| | - Zarrin Imran
- Nematode Biodiversity Research Lab, Department of Zoology, Aligarh Muslim University, Aligarh, 202002, India
| | - Wasim Ahmad
- Nematode Biodiversity Research Lab, Department of Zoology, Aligarh Muslim University, Aligarh, 202002, India.
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3
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Gupta D, Bhandari S, Bhusal DR. Variation of nematode indices under contrasting pest management practices in a tomato growing agro-ecosystem. Heliyon 2019; 5:e02621. [PMID: 31646210 PMCID: PMC6804366 DOI: 10.1016/j.heliyon.2019.e02621] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 07/18/2019] [Accepted: 10/04/2019] [Indexed: 02/07/2023] Open
Abstract
This study examined the variation of generic composition and nematode indices to evaluate the soil health status under differently treated tomato growing experimental plots. The study was conducted from 2016 to 2018 in summer and winter seasons on a traditionally tomato (Lycopersicon esculentum) growing farm in the Northern part of the Kathmandu valley, Nepal. Soil samples were taken from four types of replicating plots (each 5 × 5 m sq.) each using a different pest control method consisting of: cattle manure (MP), chemical pesticides (PP), botanical pesticides (BP), and a control plot (CP). The nematode communities were extracted, colonizer-persister (c-p) values assigned and ecological indices such as maturity index (MI), enrichment indexes (EI), structural index (SI) and channel index (CI) were calculated. The low abundance of all indices in pesticide applied plots during both seasons (winter and summer) was recorded. This result indicated pesticide application can be linked to the sensitivity of nematode genera. Nematode indices such as maturity index (MI), enrichment index (EI) and structural index (SI) were significantly affected with lower mean value especially in chemical pesticides applied plots during both the summer and winter seasons. The decomposition channel index (CI) did not exhibit significant variation in our analysis of treatment plots in either season. There was a positive response towards moisture content, soil temperature and nitrogen-carbon ratios for these indices. Nematode genera and indices showed significant variation for pest management practices in tomato grown plots.
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Affiliation(s)
- Dipak Gupta
- Central Departments of Zoology, Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Shivish Bhandari
- Himalayan Biodiversity Network – Nepal, Bharatpur 11, Chitwan, Nepal
- Austin Peay State University, Clarksville, TN, 37044, USA
| | - Daya Ram Bhusal
- Central Departments of Zoology, Tribhuvan University, Kirtipur, Kathmandu, Nepal
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Wilschut RA, Geisen S, Martens H, Kostenko O, de Hollander M, ten Hooven FC, Weser C, Snoek LB, Bloem J, Caković D, Čelik T, Koorem K, Krigas N, Manrubia M, Ramirez KS, Tsiafouli MA, Vreš B, van der Putten WH. Latitudinal variation in soil nematode communities under climate warming-related range-expanding and native plants. GLOBAL CHANGE BIOLOGY 2019; 25:2714-2726. [PMID: 31002208 PMCID: PMC6617783 DOI: 10.1111/gcb.14657] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 01/14/2019] [Accepted: 03/28/2019] [Indexed: 05/30/2023]
Abstract
Current climate change has led to latitudinal and altitudinal range expansions of numerous species. During such range expansions, plant species are expected to experience changes in interactions with other organisms, especially with belowground biota that have a limited dispersal capacity. Nematodes form a key component of the belowground food web as they include bacterivores, fungivores, omnivores and root herbivores. However, their community composition under climate change-driven intracontinental range-expanding plants has been studied almost exclusively under controlled conditions, whereas little is known about actual patterns in the field. Here, we use novel molecular sequencing techniques combined with morphological quantification in order to examine nematode communities in the rhizospheres of four range-expanding and four congeneric native species along a 2,000 km latitudinal transect from South-Eastern to North-Western Europe. We tested the hypotheses that latitudinal shifts in nematode community composition are stronger in range-expanding plant species than in congeneric natives and that in their new range, range-expanding plant species accumulate fewest root-feeding nematodes. Our results show latitudinal variation in nematode community composition of both range expanders and native plant species, while operational taxonomic unit richness remained the same across ranges. Therefore, range-expanding plant species face different nematode communities at higher latitudes, but this is also the case for widespread native plant species. Only one of the four range-expanding plant species showed a stronger shift in nematode community composition than its congeneric native and accumulated fewer root-feeding nematodes in its new range. We conclude that variation in nematode community composition with increasing latitude occurs for both range-expanding and native plant species and that some range-expanding plant species may become released from root-feeding nematodes in the new range.
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Affiliation(s)
- Rutger A. Wilschut
- Netherlands Institute of EcologyWageningenThe Netherlands
- Laboratory of NematologyWageningen UniversityWageningenThe Netherlands
| | - Stefan Geisen
- Netherlands Institute of EcologyWageningenThe Netherlands
| | - Henk Martens
- Netherlands Institute of EcologyWageningenThe Netherlands
| | - Olga Kostenko
- Netherlands Institute of EcologyWageningenThe Netherlands
| | | | | | - Carolin Weser
- Netherlands Institute of EcologyWageningenThe Netherlands
| | - L. Basten Snoek
- Netherlands Institute of EcologyWageningenThe Netherlands
- Theoretical Biology and BioinformaticsUtrecht UniversityUtrechtThe Netherlands
| | - Janneke Bloem
- Netherlands Institute of EcologyWageningenThe Netherlands
| | - Danka Caković
- Department of Biology, Faculty of Natural Sciences and MathematicsUniversity of MontenegroPodgoricaMontenegro
| | - Tatjana Čelik
- Biološki inštitut Jovana HadžijaZRC SAZULjubljanaSlovenia
| | - Kadri Koorem
- Netherlands Institute of EcologyWageningenThe Netherlands
- Department of Botany, Institute of Ecology and Earth SciencesUniversity of TartuTartuEstonia
| | - Nikos Krigas
- Department of Ecology, School of BiologyAristotle UniversityThessalonikiGreece
- Institute of Plant Breeding and Genetic ResourcesHellenic Agricultural Organization DemeterThessalonikiGreece
| | - Marta Manrubia
- Netherlands Institute of EcologyWageningenThe Netherlands
| | | | - Maria A. Tsiafouli
- Department of Ecology, School of BiologyAristotle UniversityThessalonikiGreece
| | - Branko Vreš
- Biološki inštitut Jovana HadžijaZRC SAZULjubljanaSlovenia
| | - Wim H. van der Putten
- Netherlands Institute of EcologyWageningenThe Netherlands
- Laboratory of NematologyWageningen UniversityWageningenThe Netherlands
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5
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Abstract
There are great concerns about the impacts of soil biodiversity loss on ecosystem functions and services such as nutrient cycling, food production, and carbon storage. A diverse community of soil organisms that together comprise a complex food web mediates such ecosystem functions and services. Recent advances have shed light on the key drivers of soil food web structure, but a conceptual integration is lacking. Here, we explore how human-induced changes in plant community composition influence soil food webs. We present a framework describing the mechanistic underpinnings of how shifts in plant litter and root traits and microclimatic variables impact on the diversity, structure, and function of the soil food web. We then illustrate our framework by discussing how shifts in plant communities resulting from land-use change, climatic change, and species invasions affect soil food web structure and functioning. We argue that unravelling the mechanistic links between plant community trait composition and soil food webs is essential to understanding the cascading effects of anthropogenic shifts in plant communities on ecosystem functions and services.
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Affiliation(s)
- Paul Kardol
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Jonathan R. De Long
- Department of Terrestrial Ecology, Netherlands Institute of Ecology, Wageningen, Netherlands
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Zhao K, Jing X, Sanders NJ, Chen L, Shi Y, Flynn DFB, Wang Y, Chu H, Liang W, He J. On the controls of abundance for soil‐dwelling organisms on the Tibetan Plateau. Ecosphere 2017. [DOI: 10.1002/ecs2.1901] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Ke Zhao
- Department of Ecology College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University 5 Yiheyuan Road Beijing 100871 China
| | - Xin Jing
- Department of Ecology College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University 5 Yiheyuan Road Beijing 100871 China
| | - Nathan J. Sanders
- Rubenstein School of Environment and Natural Resources University of Vermont Burlington Vermont 05405 USA
| | - Litong Chen
- Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau Biology Chinese Academy of Sciences 23 Xinning Road Xining 810008 China
| | - Yu Shi
- State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China
| | - Dan F. B. Flynn
- The Arnold Arboretum of Harvard University 1300 Centre Street Boston Massachusetts 02131 USA
| | - Yonghui Wang
- Department of Ecology College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University 5 Yiheyuan Road Beijing 100871 China
| | - Haiyan Chu
- State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China
| | - Wenju Liang
- State Key Laboratory of Forest and Soil Ecology Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110164 China
| | - Jin‐Sheng He
- Department of Ecology College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University 5 Yiheyuan Road Beijing 100871 China
- Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau Biology Chinese Academy of Sciences 23 Xinning Road Xining 810008 China
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