Changes in active microbial biomass by earthworms and grass amendments in agricultural soil

Svensson, Kalle; Friberg, Hanna

doi:10.1007/s00374-007-0200-3

Cited by 21 publications

(5 citation statements)

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“…During the gut passage, the number of microorganisms increases significantly and the structure of microbial communities changes [36]; some microbes are digested while others are stimulated by the rich nutrient supply [13]. Recently, Svensson and Friberg [37] found higher active microbial biomass in soil with Aporrectodea caliginosa than in soil without earthworms in a microcosm experiment with arable soil. Though the direct effect of earthworms on the increased CO 2 accumulation in and subsequent emission from the soil in the present study cannot be excluded, it is likely that earthworms increased soil CO 2 production indirectly, due to the effects on soil microbial community.…”

Section: Resultsmentioning

confidence: 99%

Soil CO2 flux affected by Aporrectodea caliginosa earthworms

Šimek¹,

Pižl

2010

Open Life Sciences

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Abstract:The effects of Aporrectodea caliginosa earthworms on both carbon dioxide (CO 2 ) accumulation in and emissions from soil, as well as the simultaneous impact of earthworms on soil microbiological properties were investigated in a microcosm experiment carried out over 5.5 months. Concentration of CO 2 in soil air was greater at a depth of 15 cm when compared with a depth of 5 cm, but varied during the season both in control and earthworm-inhabited chambers. Peaks of CO 2 concentrations at both depths occurred in both treatments during August, approximately 80 days after the experiment started. Generally, the presence of earthworms increased the CO 2 concentration at 15-cm depth. Larger CO 2 emissions were consistently recorded in conjunction with higher amounts of CO 2 in soil air when chambers were inhabited by earthworms. The total CO 2 emissions during the experimental period covering 161 days were estimated at 118 g CO 2 -C m -2 and 99 g CO 2 -C m -2 from chambers with and without earthworms respectively. Moreover, the presence of earthworms increased microbial biomass in the centre and at the bottom of chambers, and enhanced both dehydrogenase activity and nitrifying enzyme activity in the soils. We suggest that the effect of earthworms on both the enhanced soil accumulation of CO 2 as well as emissions of CO 2 was mostly indirect, due to the impacts of earthworms on soil microbial community. © Versita Sp. z o.o.

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Section: Resultsmentioning

confidence: 99%

Soil CO2 flux affected by Aporrectodea caliginosa earthworms

Šimek¹,

Pižl

2010

Open Life Sciences

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“…A. caliginosa plays several key ecological roles such as nutrient cycling (e.g., increasing nitrogen flux and lowering the C/N ratio (Sandor and Schrader 2007 ; McDaniel et al 2013 ) and enhancing nutrient availability for plants and microorganisms (Sharpley and Syers 1976 ; Sharpley and Syers 1977 ). A. caliginosa can also increase microbial biomass (Svensson and Friberg 2007 ) and its relatively high burrowing activity can have a positive impact on water infiltration /discharge (Ernst et al 2009 ; McDaniel et al 2015 ) and on soil aeration (Francis and Fraser 1998 ). Nevertheless, Eisenia sp .…”

Section: Introductionmentioning

confidence: 99%

Aporrectodea caliginosa, a relevant earthworm species for a posteriori pesticide risk assessment: current knowledge and recommendations for culture and experimental design

Bart

Amossé

Lowe

et al. 2018

Environ Sci Pollut Res

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Ecotoxicological tests with earthworms are widely used and are mandatory for the risk assessment of pesticides prior to registration and commercial use. The current model species for standardized tests is Eisenia fetida or Eisenia andrei. However, these species are absent from agricultural soils and often less sensitive to pesticides than other earthworm species found in mineral soils. To move towards a better assessment of pesticide effects on non-target organisms, there is a need to perform a posteriori tests using relevant species. The endogeic species Aporrectodea caliginosa (Savigny, 1826) is representative of cultivated fields in temperate regions and is suggested as a relevant model test species. After providing information on its taxonomy, biology, and ecology, we reviewed current knowledge concerning its sensitivity towards pesticides. Moreover, we highlighted research gaps and promising perspectives. Finally, advice and recommendations are given for the establishment of laboratory cultures and experiments using this soil-dwelling earthworm species.Electronic supplementary materialThe online version of this article (10.1007/s11356-018-2579-9) contains supplementary material, which is available to authorized users.

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“…Earthworms are remarkable drivers of decomposition of dead organic matter and bioturbation processes in soil; they increase mineralisation rate of organic matter due to the enhancement of microbial activity [1] and modify the physical structure of soil. Earthworms come into interactions with microorganisms not only during their direct ingestion but also affect microbial life indirectly by forming and altering their habitat [2].…”

Section: Introductionmentioning

confidence: 99%