Nematode Feeding by Tropical Earthworms

Dash, M. C.; Senapati, B. K.; Mishra, C. C.

doi:10.2307/3544291

Cited by 77 publications

(27 citation statements)

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“…Cocoon development time for temperate epigeic worms Eisenia fetida (32-73days), Dendrobaena veneta (40-126days), and for tropical epigeic worm E.eugeniea (13-27days) and Perionyx excavates (16-21days) was reported by Edwards 36 . Likewise, rare emergence of two juveniles from cocoons in L.maurutii was reported by Dash and Senapathi 37 . They also reported prolonged incubation period in L.maurutii is due to delayed development of hatchlings per cocoon due to limited availability of resources to all embryos in a cocoon.…”

Section: Discussionsupporting

confidence: 54%

Extent of Heavy Metal Accumulation in Sewage Irrigated Soils and Their Impact on Distribution of Earthworm Communities: Linking Chromium and Zinc Toxicity on Growth and Reproduction in Selected Earthworm Species.

Latha

Basha

2016

Curr. World Environ

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Soil ecosystem polluted by metals affect the structure of soil invertebrate population(s) and dynamics leading to altered distribution of species. This study focuses on earthworm distribution in sewage irrigated agricultural lands around Bangalore. The occurrence of reported species from the sampled areas is Eudrilus eugeniae, Lampito maurutii, Pontoscolex corethrurus, Polypheretima elongata, Perioynx excavates and Eisenia fetida. Laboratory studies conducted to evaluate feed ingestion rate and body mass changes in earthworms exposed to metal spiked soils revealed species specific pattern. Eudrilus eugeniae and Lampito maurutii showed a steep increase in body weight, while Pontoscolex corethrurus exhibited decreased trend upon Zn exposure. Contrarily a significant (p<0.05) decline in body weight was evident in all the three species upon exposure to Cr spiked soils. The observed alterations in feeding and body mass index concomitantly influenced the reproductive parameters. Rate of hatchability and reproductive function found to be decreased in Cr spiked soils in all the three species studied. Contrarily, increased hatchability was observed in E.eugeniea and L.maurutii followed by a decrease rate in P.corethrurus upon exposure of Zn spiked soils. However, reproductive rate found to be increased in E.eugeniea and P.corethrurus with decreased trend in L.maurutii. Thus, use of sewage polluted water for irrigation purpose has led to increased soil metal concentration impacting earthworm physiology and distribution.

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Section: Discussionsupporting

confidence: 54%

Extent of Heavy Metal Accumulation in Sewage Irrigated Soils and Their Impact on Distribution of Earthworm Communities: Linking Chromium and Zinc Toxicity on Growth and Reproduction in Selected Earthworm Species.

Latha

Basha

2016

Curr. World Environ

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“…Earthworms induce the nematode population in the soil and nematode tropic structure 47 which help in assimilating amino acids with other compounds 48 . In contrast, Lampito mauritii decreased the numbers of nematodes 49 . Micro-arthropod population in soils e.g.…”

Section: Soil Biodiversity Interactionsmentioning

confidence: 99%

Role of Earthworm in Improving Soil Structure and Functioning

Sharma¹,

Tomar²,

Chakraborty³

2017

Current Science

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Earthworms commonly occur within the soil. They alter physico-chemical and biological regimes of the soil through their activities, such as burrowing, casting, feeding and propagating, and therefore are known as 'ecosystem engineers'. Through their activities, they provide a number of ecosystem services which are ecologically and socio-economically important. This article reviews the role of earthworms in improving soil structural and functional properties, which serves as key determinants of soil ecosystem services and economic benefits for the farmers. A methodology of economic evaluation of the agro-ecosystem services provided by earthworms has been demonstrated. Further, the information gaps and future research have been discussed for ensuring sustainable agroecosystems management.

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“…Moreover, earthworms feed on protists (e.g. naked amoebae) and nematodes (Dash et al 1980;Bonkowski and Schaefer 1997), and so they might regulate their community composition and abundance also via direct trophic effects.…”

Section: Protists and Nematodes Around Anecic Earthworm Burrowsmentioning

confidence: 99%

Organic matter composition and the protist and nematode communities around anecic earthworm burrows

et al. 2015

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By living in permanent burrows and incorporating organic detritus from the soil surface, anecic earthworms contribute to soil heterogeneity, but their impact is still understudied in natural field conditions. We investigated the effects of the anecic earthworm Lumbricus centralis on fresh carbon (C) incorporation, soil organic matter composition, protists, and nematodes of a Cambisol under grassland. We used plant material labelled with stable isotope tracers to detect fresh C input around earthworm-occupied burrows or around burrows from which the earthworm had been removed. After 50 days, we sampled soil (0-10 cm depth) in concentric layers around the burrows, distinguishing between drilosphere (0-8 mm) and bulk soil (50-75 mm). L. centralis effectively incorporated fresh C into the drilosphere, and this shifted soil organic matter amount and chemistry: total soil sugar content was increased compared to unoccupied drilosphere and bulk soil, and the contribution of plant-derived sugars to soil organic matter was enhanced. Earthworms also shifted the spatial distribution of soil C towards the drilosphere. The total abundance of protists and nematodes was only slightly higher in earthworm-occupied drilosphere, but strong positive effects were found for some protist clades (e.g. Stenamoeba spp.). Additional data for the co-occurring anecic earthworm species Aporrectodea longa showed that it incorporated fresh C less than L. centralis, suggesting that the two species may have different effects on soil C distribution and organic matter quality.

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Nematode Feeding by Tropical Earthworms

Cited by 77 publications

References 1 publication

Extent of Heavy Metal Accumulation in Sewage Irrigated Soils and Their Impact on Distribution of Earthworm Communities: Linking Chromium and Zinc Toxicity on Growth and Reproduction in Selected Earthworm Species.

Extent of Heavy Metal Accumulation in Sewage Irrigated Soils and Their Impact on Distribution of Earthworm Communities: Linking Chromium and Zinc Toxicity on Growth and Reproduction in Selected Earthworm Species.

Role of Earthworm in Improving Soil Structure and Functioning

Organic matter composition and the protist and nematode communities around anecic earthworm burrows

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