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Influence of ecological and edaphic factors on biodiversity of soil nematodes
Saudi Journal of Biological Sciences Pub Date : 2021-02-24 , DOI: 10.1016/j.sjbs.2021.02.046
Rawhat Un Nisa , Aadil Yousuf Tantray , Nazia Kouser , Kaisar Ahmad Allie , Shaheen Majeed Wani , Saud A. Alamri , Mohammed Nasser Alyemeni , Leonard Wijaya , Ali Asghar Shah

Nematodes are the most diverse and highly significant group of soil-inhabiting microorganisms that play a vital role in organic material decomposition and nutrient recycling.

Diverse geographical locations and environmental gradients show a significant impact on the diversity of nematodes. Present study aims to assess the effects of ecological (altitude, temperature, moisture) and edaphic (soil pH, nutrients, soil patches) factors on the soil nematode diversity and structure at five different landscape patches (forests, apple orchards, rice fields, pastures, and alpine zone) from ten different sites of Kashmir valley (India). Differences in the altitudinal gradients results in the shift of generic nematode population. Among the soil patches, highest nematode diversity was observed in forest soil and least in alpine soil; however, bacteriovorous nematodes dominated all the soil patches. The temperature and moisture have a significant effect on nematode diversity, the highest nematode trophic levels were observed above 21°C temperature, and 30% moisture. Nematode abundance decreased from alkaline to acidic pH of the soil. Soil nutrients such as, nitrogen (N) and phosphorus (P) have shown a detrimental effect in nematode richness at each site, where nematode diversity and richness of genera were higher at abundant soil N and P but decreased at low soil nutrients. Ecological indices like diversity index (DI), Shannon-Wiener Index (H'), enrichment index (EI), and maturity Index (MI) values demonstrated forest soil more favourable for nematodes and high soil health status than other soil patches. This study suggested that these indices may be helpful as soil monitoring tools and assessing ecosystem sustainability and biodiversity.



中文翻译:

生态和生态因素对土壤线虫生物多样性的影响

线虫是最多样化和高度重要的土壤微生物,在有机物的分解和养分的循环中起着至关重要的作用。

多样化的地理位置和环境梯度对线虫的多样性影响很大。本研究旨在评估生态(海拔,温度,湿度)和土壤(土壤pH,养分,土壤斑块)因子对五个不同景观斑块(森林,苹果园,稻田,牧场)土壤线虫多样性和结构的影响和高寒地带),分别来自克什米尔山谷(印度)的十个不同地点。海拔梯度的差异导致普通线虫种群的转移。在土壤斑块中,在森林土壤中观察到最高的线虫多样性,而在高山土壤中观察到的最少。然而,细菌性线虫主导了所有的土壤斑块。温度和湿度对线虫多样性有重要影响,在高于21°C的温度和30%的湿度下观察到最高的线虫营养水平。线虫的丰度从土壤的碱性pH降低到酸性pH。土壤养分(例如氮(N)和磷(P))对每个部位的线虫丰富性都具有有害作用,其中,线虫的多样性和丰富度在土壤中的氮和磷含量较高时有所降低,而在土壤低养分时则有所降低。生态指数如多样性指数(DI),香农-维纳指数(H'),富集指数(EI)和成熟指数(MI)值表明,森林土壤比其他土壤斑块更适合线虫和较高的土壤健康状况。这项研究表明,这些指数作为土壤监测工具和评估生态系统可持续性和生物多样性可能会有所帮助。线虫的丰度从土壤的碱性pH降低到酸性pH。土壤养分(例如氮(N)和磷(P))对每个部位的线虫丰富性都具有有害作用,其中,线虫的多样性和丰富度在土壤中的氮和磷含量较高时有所降低,而在土壤低养分时则有所降低。生态指数如多样性指数(DI),香农-维纳指数(H'),富集指数(EI)和成熟指数(MI)值表明,森林土壤比其他土壤斑块更适合线虫和较高的土壤健康状况。这项研究表明,这些指数作为土壤监测工具和评估生态系统可持续性和生物多样性可能会有所帮助。线虫的丰度从土壤的碱性pH降低到酸性pH。土壤养分(例如氮(N)和磷(P))对每个部位的线虫丰富性都具有有害作用,其中,线虫的多样性和丰富度在土壤中的氮和磷含量较高时有所降低,而在土壤低养分时则有所降低。生态指数如多样性指数(DI),香农-维纳指数(H'),富集指数(EI)和成熟指数(MI)值表明,森林土壤比其他土壤斑块更适合线虫和较高的土壤健康状况。这项研究表明,这些指数作为土壤监测工具和评估生态系统可持续性和生物多样性可能会有所帮助。氮和磷含量较高时,线虫的多样性和丰富度较高,而土壤养分含量较低时,线虫的多样性和丰富度下降。生态指数如多样性指数(DI),香农-维纳指数(H'),富集指数(EI)和成熟指数(MI)值表明,森林土壤比其他土壤斑块更适合线虫和较高的土壤健康状况。这项研究表明,这些指数作为土壤监测工具和评估生态系统可持续性和生物多样性可能会有所帮助。氮和磷含量较高时,线虫的多样性和丰富度较高,而土壤养分含量较低时,线虫的多样性和丰富度下降。生态指数如多样性指数(DI),香农-维纳指数(H'),富集指数(EI)和成熟指数(MI)值表明,森林土壤比其他土壤斑块更适合线虫和较高的土壤健康状况。这项研究表明,这些指数作为土壤监测工具和评估生态系统可持续性和生物多样性可能会有所帮助。

更新日期:2021-04-30
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