Non-trophic effects of earthworms on enchytraeids: An experimental investigation

Karaban, Kamil; Uvarov, Alexei V.

doi:10.1016/j.soilbio.2014.02.006

Cited by 13 publications

(6 citation statements)

References 41 publications

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“…Because enchytraeids and earthworms have close habitats, interactions may occur, especially competition for food resources (Karaban and Uvarov, 2014;Domínguez and Bedano, 2016).…”

Section: Relationships Between Oligochaeta and Feeding Activitymentioning

confidence: 99%

“…Similarly, Beylich and Graefe (2012) highlighted that the density of both families was not significantly correlated in various land uses: forest, wet grassland, grassland, and cropland. Under controlled conditions, Karaban and Uvarov (2014) reported that the inoculation of two individuals of the epigeic species Lumbricus rubellus negatively affected enchytraeid number (from 255 to 204 individuals per experimental unit) and especially litter enchytraeids (species not specified), which nearly disappeared. By contrast, positive effects of two A. caliginosa -an endogeic earthworm species -were observed on enchytraeid number (from 255 to 477 individuals per experimental unit) mainly explained by non-trophic relationships (i.e.…”

Section: Relationships Between Oligochaeta and Feeding Activitymentioning

confidence: 99%

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Short-term effects of two fungicides on enchytraeid and earthworm communities under field conditions

et al. 2018

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Because of the wide use of pesticides in agriculture, there is still a need of higher-tier field studies to assess ecotoxicological effects of commercial formulations on a wider variety of non-target soil organisms such as soil annelids. We here tested the effects of different concentrations of two fungicide formulations, i.e., Cuprafor Micro (composed of 500 g kg copper oxychloride) and Swing Gold (composed of 50 g l epoxiconazole and 133 g l dimoxystrobin) on two families of terrestrial oligochaetes (Lumbricidae and Enchytraeidae) after 1 month of exposure. We also assessed the feeding activity of soil organisms using the bait lamina method. Along with the feeding activity, the enchytraeid density, diversity and communities were not different in the control and the contaminated plots. By contrast, epigeic earthworms were absent and earthworm diversity and densities of anecic species decreased significantly in the plots contaminated at ten times the recommended dose of the Swing Gold formulation. The copper fungicide (at 0.75 and 7.5 kg Cu ha) and the treatment with the pesticide mixture (Cuprafor Micro at 0.75 kg Cu ha and Swing Gold at the recommended dose) did not affect Oligochaeta communities compared with the control, except the Shannon index for earthworms in the mixture of both fungicides. Responses of the two annelid families to the tested pesticides were different with higher effects observed on the diversity and the community structure of earthworms compared with enchytraeids. This study allowed detecting early changes on oligochaete populations after pesticide application.

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“…Because enchytraeids and earthworms have close habitats, interactions may occur, especially competition for food resources (Karaban and Uvarov, 2014;Domínguez and Bedano, 2016).…”

Section: Relationships Between Oligochaeta and Feeding Activitymentioning

confidence: 99%

Section: Relationships Between Oligochaeta and Feeding Activitymentioning

confidence: 99%

Short-term effects of two fungicides on enchytraeid and earthworm communities under field conditions

et al. 2018

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“…Knowledge about the relationships among earthworms, enchytraeids and nematodes remains limited, especially in the urban context where more is known also about each individual group, and bioindication tools for assessing soil quality are still being developed [29,99,100]. The effect that each of these groups has on the others or on interactions with other groups such as collembolans has been studied in forest and agricultural soils, especially showing effects of earthworms on smaller soil organisms [40,41,[101][102][103][104]. In our study, no significant correlation was found between earthworms and enchytraeid and/or nematode assemblages, suggesting that these three groups represent potential complementary indicators of soil conditions and functioning in urban soils.…”

Section: Annelid and Nematode Assemblages' Relationships And Their Ecmentioning

confidence: 99%

Patterns of earthworm, enchytraeid and nematode diversity and community structure in urban soils of different ages

Amossé

Dózsa‐Farkas

Boros

et al. 2016

European Journal of Soil Biology

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Annelids (Lumbricidae and Enchytraeidae) and nematodes are common soil organisms and play important roles in organic matter decomposition, nutrient cycling and creation of soil structure and porosity. However, these three groups have rarely been studied together and only few studies exist for urban soils. We studied the diversity and community composition of annelids and nematodes in soils spanning more than two centuries of urban soil development in Neuchâtel (Switzerland) and assessed the relationships 1) among these three groups and 2) between each group and environmental (physical, chemical and functional) characteristics of soils and soil age. While the groups of environmental variables were correlated (Mantel tests) no correlation was found between pairs of soil fauna groups and between each soil fauna group and environmental variables. More specifically, redundancy analyses showed that earthworm assemblages were best correlated with soil bulk density and with soil depth, the latter being positively correlated with soil age. Enchytraeid assemblages and the proportion of enchytraeid r-strategists were respectively best correlated with soil carbonate content and negatively correlated with soil age. Nematodes assemblages were best correlated with soil water content. Moreover, relationships between pairs of soil biota groups, and between each group and environmental (physical, chemical and functional) variables, varied along the soil age gradient (moving window analysis). This study provides new knowledge on urban soil biodiversity and how environmental conditions can influence soil diversity and community patterns in the urban context. The contrasted community patterns of earthworms, enchytraeids and nematodes in urban soils of different ages and their different ecological roles suggest that they represent potential complementary indicators of soil quality and functioning such as soil formation and organic matter dynamics.

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“…In contrast to the well-documented strong effects of earthworms as ecosystem engineers on soil mesofauna communities (Brown 1995;Eisenhauer 2010;Karaban and Uvarov 2014), effects on earthworms by subordinate ecosystem players, such as mesofauna, can intuitively be suggested as being weak; indeed, so far they have received little attention. However, the present experiment showed evident earthworm responses to manipulations of a mesofauna community.…”

Section: Hypotheses Testingmentioning

confidence: 92%

“…Changes Communicated by Stefan Scheu. Salmon 2001Salmon , 2004Eisenhauer 2010;Karaban and Uvarov 2014). These effects also vary with respect to earthworm ecological identity and mesofauna group (as reviewed by Eisenhauer 2010).…”

Section: Introductionmentioning

confidence: 99%

Do alterations in mesofauna community affect earthworms?

Uvarov

Karaban

2015

Oecologia

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Interactions between the saprotrophic animal groups that strongly control soil microbial activities and the functioning of detrital food webs, such as earthworms and mesofauna, are not well understood. Earthworm trophic and engineering activities strongly affect mesofauna abundance and diversity through various direct and indirect pathways. In contrast, mesofauna effects on earthworm populations are less evident; however, their importance may be high, considering the keystone significance of earthworms for the functioning of the soil system. We studied effects of a diverse mesofauna community of a deciduous forest on two earthworm species representing epigeic (Lumbricus rubellus) and endogeic (Aporrectodea caliginosa) ecological groups. In microcosms, the density of total mesofauna or its separate groups (enchytraeids, collembolans, gamasid mites) was manipulated (increased) and responses of earthworms and soil systems were recorded. A rise in mesofauna density resulted in a decrease of biomass and an increased mortality in L. rubellus, presumably due to competition with mesofauna for litter resources. In contrast, similar mesofauna manipulations promoted reproduction of A. caliginosa, suggesting a facilitated exploitation of litter resources due to increased mesofauna activities. Changes of microcosm respiration rates, litter organic matter content and microbial activities across the manipulation treatments indicate that mesofauna modify responses of soil systems in the presence of earthworms. However, similar mesofauna manipulations could induce different responses in soil systems with either epigeic or endogeic lumbricids, which suggests that earthworm/mesofauna interactions are species-specific. Thus, mesofauna impacts should be treated as a factor affecting the engineering activities of epigeic and endogeic earthworms in the soil.

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Non-trophic effects of earthworms on enchytraeids: An experimental investigation

Cited by 13 publications

References 41 publications

Short-term effects of two fungicides on enchytraeid and earthworm communities under field conditions

Short-term effects of two fungicides on enchytraeid and earthworm communities under field conditions

Patterns of earthworm, enchytraeid and nematode diversity and community structure in urban soils of different ages

Do alterations in mesofauna community affect earthworms?

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