Responses of Soil Nematode Abundance and Diversity to Long-Term Crop Rotations in Tropical China

AbstractDespite 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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Soil nematode abundance and diversity from four vegetation types in Central Mexico

Nematology ◽

10.1163/15685411-00003119 ◽

2018 ◽

Vol 20 (1) ◽

pp. 15-32

Author(s):

Hugo H. Mejía-Madrid

Keyword(s):

Tropical Rainforest ◽

Deciduous Forest ◽

Coniferous Forest ◽

Small Sample ◽

Central Mexico ◽

Soil Nematode ◽

Vegetation Types ◽

Dry Deciduous Forest ◽

Nematode Abundance ◽

Abundance And Diversity

Soil nematode abundance and MOTU diversity were estimated from a geographically broad area of Mexico that included four out of seven recognised vegetation types. Vegetation types were assessed for abundance and diversity of nematode communities and inferred ecological relationships between them. Soils were sampled from tropical rainforest, tropical dry deciduous forest, temperate coniferous forest and xerophytic shrub during 2013, 2014 and 2015. Fourteen sampling sites withca10-20 samples per site from 11 localities spread across Central Mexico were assessed. Altitudes sampled ranged from 113 m a.s.l. (tropical coastal plain) to 2400 m a.s.l. (Trans-Mexican Volcanic Belt). Samples were drawn from conserved and cultivated plots from each sampling site covering an area of ⩾100 m2. A total of 13 263 individuals from 25 identified families of nematodes were collected. Family abundance and complementarity indices between sites revealed to some extent the affinities between vegetation types. Nevertheless, statistical analyses revealed no differences between nematode family abundances between sites, only between families across all sites. Molecular operational taxonomic units (MOTU) methods were employed as a framework to assess biodiversity. From these, 77 high-quality sequences for taxonomic barcoding were recovered and later identified with morphological traits. Only six sequences matched at a 98-99% level with those reported in GenBank. Sequences amounted to a total of 41 MOTU, where 100% of the MOTU from both conserved and disturbed tropical rainforest, tropical dry deciduous forest and xerophytic shrub exhibited a ⩾3% cut-off genetic identity, whilst temperate coniferous forest and disturbed temperate coniferous forest showed 73% and 70% respectively. In addition, 12.2% MOTU were shared among localities and 87.8% exhibited an apparently locality-limited distribution. The potential for a considerable diversity of nematodes, as revealed from a small sample of MOTU diversity, is discussed.

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Abundance and diversity of soil nematodes as influenced by different types of organic manure

Helminthologia ◽

10.2478/s11687-010-0009-8 ◽

2010 ◽

Vol 47 (1) ◽

pp. 58-66 ◽

Cited By ~ 12

Author(s):

C. Hu ◽

Y. Qi

Keyword(s):

Block Design ◽

Triticum Aestivum L ◽

Organic Manure ◽

Parasitic Nematodes ◽

Soil Nematode ◽

Effective Microorganisms ◽

Total N ◽

Different Types ◽

Nematode Abundance ◽

Abundance And Diversity

AbstractNematode abundance and diversity from different types of organic manure soil treatments were investigated in a longterm field experiment carried out in Qu-Zhou experimental station, China Agricultural University. The composts used in the experiment were a traditional compost (C) (60 % straw, 30 % livestock dung, 5 % cottonseed-pressed trash and 5 % brans), traditional compost and chicken dung compost (60 % straw, 30 % chiken dung, 5 % cottonseedpressed trash and 5 % brans) added with effective microorganisms, EMC and EMCDC respectively. Six treatments were arranged according to a randomized block design with three replicates per treatment. Treatments were incorporation into the soil of compost EMC, EMCDC, and C each at the rates of 7.5 and 15 t/ha. Plots were sown with winter wheat (Triticum aestivum L.) and summer maize (Zea mays L.) every year from 1997 to 2004. Overall, 28 nematode genera were found. Seven genera were bacterivores, 3 genera were fungivores, 13 genera were plantparasites and 5 genera were omnivores-predators. The Rhabditis, Cephalobus, Helicotylenchus were dominant genera in the present study. The bacterivores and plantparasitic nematodes were the dominant trophic groups except in C treatment. Nematode abundance per 100 g dried soil ranged from 372 to 553. Addition of effective microorganism increased the number and proportion of bacterivorous nematodes and decreased the number and proportion of plant-parasitic nematodes compared to traditional compost C. Total number of nematode was significantly influenced by compost amount, but didn’t significantly influence by EM agent. Total abundance of nematode was positively correlated with the content of soil organic matter, total N, available P and K. The long-term addition of EM agent hasn’t adverse effect on soil nematode community.

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Effect of elevated CO2 and N fertilisation on soil nematode abundance and diversity in a wheat field

Applied Soil Ecology ◽

10.1016/j.apsoil.2006.11.003 ◽

2007 ◽

Vol 36 (1) ◽

pp. 63-69 ◽

Cited By ~ 20

Author(s):

Qi Li ◽

Wenju Liang ◽

Yong Jiang ◽

Yi Shi ◽

Jianguo Zhu ◽

...

Keyword(s):

Elevated Co2 ◽

Soil Nematode ◽

Wheat Field ◽

Nematode Abundance ◽

Abundance And Diversity

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Crop rotations with clover and their productivity

Multifunctional adaptive feed production № 23 (71) ◽

10.33814/mak-2020-23-71-38-42 ◽

2020 ◽

Author(s):

Ol'ga Gladysheva ◽

Oksana Artyuhova ◽

Vera Svirina

Keyword(s):

Forest Soil ◽

Crop Rotation ◽

Gray Forest Soil ◽

Arable Land ◽

Perennial Grasses ◽

Crop Rotations ◽

Field Crop ◽

Pure Steam ◽

Positive Effect

The results of long-term research in experiments with crop rotations with different clover saturation are presented. It is shown that the cluster has a positive effect on the main indicators of vegetation of dark-gray forest soil. The introduction of two fields of perennial grasses into the six-field crop rotation significantly increases both the humus reserves and increases the productivity of arable land by 1.5–2 times compared to the crop rotation with a field of pure steam.

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Effect of long-term industrial pollution on microorganisms in soil of deciduous forests situated along a pollution gradient next to a fertilizer factory 2. Abundance and diversity of soil fungi

Ekologija ◽

10.2478/v10055-009-0017-5 ◽

2009 ◽

Vol 55 (2) ◽

pp. 133-141 ◽

Cited By ~ 4

Author(s):

Dalia Pečiulytė ◽

Vaidilutė Dirginčiutė-Volodkienė

Keyword(s):

Industrial Pollution ◽

Soil Fungi ◽

Deciduous Forests ◽

Pollution Gradient ◽

Abundance And Diversity

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Biodiversity of butterflies in endosulfan-affected areas of Kerala, India

The Journal of Basic and Applied Zoology ◽

10.1186/s41936-020-00192-w ◽

2020 ◽

Vol 81 (1) ◽

Author(s):

K. N. Raghavendra ◽

Kumar Arvind ◽

G. K. Anushree ◽

Tony Grace

Keyword(s):

Monsoon Season ◽

Winter Season ◽

Wiener Index ◽

Long Term Effects ◽

Affected Area ◽

Butterfly Assemblages ◽

Abundance And Diversity ◽

The One ◽

One Way Anova

Abstract Background Butterflies are considered as bio-indicators of a healthy and diversified ecosystem. Endosulfan was sprayed indiscriminately in large plantations of Kasaragod district, Kerala which had caused serious threats to the ecosystem. In this study, we surveyed the butterflies for their abundance and diversity in three differentially endosulfan-affected areas viz., Enmakaje—highly affected area, Periye—moderately affected area, Padanakkad—unaffected area, carried out between the end of the monsoon season and the start of the winter season, lasting approximately 100 days. Seven variables viz., butterfly abundance (N), species richness (S), Simpson’s reciprocal index (D), the Shannon–Wiener index (H′), the exponential of the Shannon–Wiener index (expH′), Pielou’s evenness (J) and species evenness (D/S), related to species diversity were estimated, followed by the one-way ANOVA (F = 25.01, p < 0.001) and the Kruskal-Wallis test (H = 22.59, p < 0.001). Results A population of three different butterfly assemblages comprised of 2300 butterflies which represented 61 species were encountered. Our results showed that Enmakaje displayed significantly lower butterfly diversity and abundance, compared to the other two communities. Conclusion So far, this is the first study concerning the effect of endosulfan on the biodiversity of butterfly in the affected areas of Kasaragod, Kerala, India. This study may present an indirect assessment of the persisting effects of endosulfan in the affected areas, suggesting its long-term effects on the ecosystem.

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