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Earthworm community structure and diversity in different land-use systems along an elevation gradient in the Western Himalaya, India
Applied Soil Ecology ( IF 4.8 ) Pub Date : 2022-03-23 , DOI: 10.1016/j.apsoil.2022.104468
Shakoor Ahmed 1 , Nithyanandam Marimuthu 2 , Basudev Tripathy 1 , Jatinder Mohan Julka 3 , Kailash Chandra 1
Affiliation  

The state Himachal Pradesh in Western Himalaya was explored to know the community structure of earthworms in agroecosystems along the elevation gradient ranges from 300 to 2500 m above sea level. The study aimed to determine the influence of climate, soil variables and the cropping pattern on species diversity and abundance. Therefore, a total of six land-use types including three crop land, and three orchards (Apple, Pear and Mango) were studied at low (300-500 m), middle (500–1500 m) and high (1500-2500 m) elevations. The results indicate that the earthworm community varies with the cropping intensity, with a greater species richness observed in the traditional cropping system including organic input vegetable field than in the cereal crop field having a high input of chemical fertilizers and using more up-to-date heavy and deep ploughing machines. The number of species significantly increased with the increasing elevation, reaching a peak at the middle but decreasing with the further elevation. The Metric-multidimensional scaling (MDS) analysis showed the highest similarity of 61% between sites of high elevation, 49% between the sites of low elevation, and 21% similarity between sites of middle and high elevations based on the density of earthworm. The Canonical correspondence analysis showed the significant positive (rainfall, soil moisture, and organic carbon) and negative (pH) relationship with earthworm density. It supports the role of physicochemical parameters in determining the earthworm community along the elevations. Except mango orchard, all sites were predominated by exotic peregrine earthworm species, which is a matter of concern for invasion and impact on the native species. While it is true that anthropogenically influenced ecosystems are more prone to invasion by alien species, further research is required in the adjacent forests to compare the impact of land-use changes on earthworm communities.



中文翻译:

印度西喜马拉雅沿海拔梯度不同土地利用系统的蚯蚓群落结构和多样性

对西喜马拉雅州喜马偕尔邦进行了探索,以了解沿海拔300至2500米海拔梯度的农业生态系统中蚯蚓的群落结构。该研究旨在确定气候、土壤变量和种植模式对物种多样性和丰度的影响。因此,在低(300-500 m)、中(500-1500 m)和高(1500-2500 m)共研究了包括三种农田和三种果园(苹果、梨和芒果)在内的六种土地利用类型。 ) 海拔。结果表明,蚯蚓群落随种植强度而变化,在包括有机投入蔬菜田在内的传统种植系统中观察到的物种丰富度高于在化学肥料投入高和使用更先进的重耕和深耕机器的谷类作物田中。物种数量随着海拔的升高而显着增加,在中部达到高峰,但随着海拔的升高而减少。公制多维尺度(MDS)分析显示,根据蚯蚓的密度,高海拔站点之间的相似性最高,为 61%,低海拔站点之间为 49%,中高海拔站点之间相似性为 21%。典型对应分析表明,与蚯蚓密度呈显着正(降雨、土壤水分和有机碳)和负(pH)关系。它支持物理化学参数在确定沿海拔的蚯蚓群落中的作用。除芒果园外,所有地点均以外来游隼物种为主,这是一个值得关注的入侵和对本地物种影响的问题。虽然人为影响的生态系统确实更容易受到外来物种的入侵,但需要在邻近的森林中进行进一步的研究,以比较土地利用变化对蚯蚓群落的影响。

更新日期:2022-03-23
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