Effects of decomposing cadavers on soil nematode communities over a one-year period

I Szelecz, F Sorge, CVW Seppey, M Mulot, H Steel, R Neilson, BS Griffiths, J Amendt, EAD Mitchell

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Abstract

In terrestrial ecosystems decomposing cadavers act as resource patches affecting nutrient cycling and soil communities, but the effects on soil communities are not well known. In this study we investigated nematode community response to decomposing pig cadavers (Sus scrofa) over a one-year period. As nematodes play key roles in soil food webs and are known to respond to disturbances and nutrient enrichment, we hypothesised that they would respond to decomposing cadavers and that this response would change over time. We compared the temporal patterns of nematode density and community structure under pig cadavers, either placed directly on the ground or hung 1 m aboveground (for effects of cadaveric fluids only), with two controls, i.e., bare soil and bags filled with soil placed on the ground (fake pigs e for microclimatic effects only). In the control and fake pig treatments nematode densities, community patterns and maturity indices did not change significantly. In contrast, density increased significantly underneath the ground and hanging pigs two weeks after the beginning of the experiment, and nematode family richness, Simpson diversity and maturity index were significantly reduced in the cadaver treatments. Most nematode families responded negatively to cadavers with the notable exceptions of Rhabditidae, Neodiplogasteridae and Diplogasteroididae. The latter two were found exclusively underneath the decomposing cadavers and are promising bioindicators of vertebrate cadaver decomposition. Even though diversity, density and communities were recovering after one year, the impact of cadavers was still significant for the maturity index. These contrasting patterns illustrate how decomposing cadavers contribute to increasing local biodiversity and suggest that soil nematodes could be used as a tool to document the presence of a decomposing cadaver, or to estimate the time elapsed since death (post-mortem interval). Patterns should, however, be compared in different settings and seasons before such a tool can be validated. © 2016 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)405 - 416
Number of pages12
JournalSoil Biology and Biochemistry
Volume103
Early online date30 Sep 2016
DOIs
Publication statusFirst published - 30 Sep 2016

Fingerprint

soil nematodes
swine
Nematoda
Rhabditidae
soil food webs
soil
Sus scrofa
biogeochemical cycles
bags
vertebrates
biodiversity
death

Bibliographical note

1023321

Keywords

  • Cadaver decomposition
  • Community ecology
  • Post-mortem interval
  • Soil biodiversity
  • Temporal patterns

Cite this

Szelecz, I., Sorge, F., Seppey, CVW., Mulot, M., Steel, H., Neilson, R., ... Mitchell, EAD. (2016). Effects of decomposing cadavers on soil nematode communities over a one-year period. Soil Biology and Biochemistry, 103, 405 - 416. https://doi.org/10.1016/j.soilbio.2016.09.011
Szelecz, I ; Sorge, F ; Seppey, CVW ; Mulot, M ; Steel, H ; Neilson, R ; Griffiths, BS ; Amendt, J ; Mitchell, EAD. / Effects of decomposing cadavers on soil nematode communities over a one-year period. In: Soil Biology and Biochemistry. 2016 ; Vol. 103. pp. 405 - 416.
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abstract = "In terrestrial ecosystems decomposing cadavers act as resource patches affecting nutrient cycling and soil communities, but the effects on soil communities are not well known. In this study we investigated nematode community response to decomposing pig cadavers (Sus scrofa) over a one-year period. As nematodes play key roles in soil food webs and are known to respond to disturbances and nutrient enrichment, we hypothesised that they would respond to decomposing cadavers and that this response would change over time. We compared the temporal patterns of nematode density and community structure under pig cadavers, either placed directly on the ground or hung 1 m aboveground (for effects of cadaveric fluids only), with two controls, i.e., bare soil and bags filled with soil placed on the ground (fake pigs e for microclimatic effects only). In the control and fake pig treatments nematode densities, community patterns and maturity indices did not change significantly. In contrast, density increased significantly underneath the ground and hanging pigs two weeks after the beginning of the experiment, and nematode family richness, Simpson diversity and maturity index were significantly reduced in the cadaver treatments. Most nematode families responded negatively to cadavers with the notable exceptions of Rhabditidae, Neodiplogasteridae and Diplogasteroididae. The latter two were found exclusively underneath the decomposing cadavers and are promising bioindicators of vertebrate cadaver decomposition. Even though diversity, density and communities were recovering after one year, the impact of cadavers was still significant for the maturity index. These contrasting patterns illustrate how decomposing cadavers contribute to increasing local biodiversity and suggest that soil nematodes could be used as a tool to document the presence of a decomposing cadaver, or to estimate the time elapsed since death (post-mortem interval). Patterns should, however, be compared in different settings and seasons before such a tool can be validated. {\circledC} 2016 Elsevier Ltd. All rights reserved.",
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Szelecz, I, Sorge, F, Seppey, CVW, Mulot, M, Steel, H, Neilson, R, Griffiths, BS, Amendt, J & Mitchell, EAD 2016, 'Effects of decomposing cadavers on soil nematode communities over a one-year period', Soil Biology and Biochemistry, vol. 103, pp. 405 - 416. https://doi.org/10.1016/j.soilbio.2016.09.011

Effects of decomposing cadavers on soil nematode communities over a one-year period. / Szelecz, I; Sorge, F; Seppey, CVW; Mulot, M; Steel, H; Neilson, R; Griffiths, BS; Amendt, J; Mitchell, EAD.

In: Soil Biology and Biochemistry, Vol. 103, 30.09.2016, p. 405 - 416.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Effects of decomposing cadavers on soil nematode communities over a one-year period

AU - Szelecz, I

AU - Sorge, F

AU - Seppey, CVW

AU - Mulot, M

AU - Steel, H

AU - Neilson, R

AU - Griffiths, BS

AU - Amendt, J

AU - Mitchell, EAD

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N2 - In terrestrial ecosystems decomposing cadavers act as resource patches affecting nutrient cycling and soil communities, but the effects on soil communities are not well known. In this study we investigated nematode community response to decomposing pig cadavers (Sus scrofa) over a one-year period. As nematodes play key roles in soil food webs and are known to respond to disturbances and nutrient enrichment, we hypothesised that they would respond to decomposing cadavers and that this response would change over time. We compared the temporal patterns of nematode density and community structure under pig cadavers, either placed directly on the ground or hung 1 m aboveground (for effects of cadaveric fluids only), with two controls, i.e., bare soil and bags filled with soil placed on the ground (fake pigs e for microclimatic effects only). In the control and fake pig treatments nematode densities, community patterns and maturity indices did not change significantly. In contrast, density increased significantly underneath the ground and hanging pigs two weeks after the beginning of the experiment, and nematode family richness, Simpson diversity and maturity index were significantly reduced in the cadaver treatments. Most nematode families responded negatively to cadavers with the notable exceptions of Rhabditidae, Neodiplogasteridae and Diplogasteroididae. The latter two were found exclusively underneath the decomposing cadavers and are promising bioindicators of vertebrate cadaver decomposition. Even though diversity, density and communities were recovering after one year, the impact of cadavers was still significant for the maturity index. These contrasting patterns illustrate how decomposing cadavers contribute to increasing local biodiversity and suggest that soil nematodes could be used as a tool to document the presence of a decomposing cadaver, or to estimate the time elapsed since death (post-mortem interval). Patterns should, however, be compared in different settings and seasons before such a tool can be validated. © 2016 Elsevier Ltd. All rights reserved.

AB - In terrestrial ecosystems decomposing cadavers act as resource patches affecting nutrient cycling and soil communities, but the effects on soil communities are not well known. In this study we investigated nematode community response to decomposing pig cadavers (Sus scrofa) over a one-year period. As nematodes play key roles in soil food webs and are known to respond to disturbances and nutrient enrichment, we hypothesised that they would respond to decomposing cadavers and that this response would change over time. We compared the temporal patterns of nematode density and community structure under pig cadavers, either placed directly on the ground or hung 1 m aboveground (for effects of cadaveric fluids only), with two controls, i.e., bare soil and bags filled with soil placed on the ground (fake pigs e for microclimatic effects only). In the control and fake pig treatments nematode densities, community patterns and maturity indices did not change significantly. In contrast, density increased significantly underneath the ground and hanging pigs two weeks after the beginning of the experiment, and nematode family richness, Simpson diversity and maturity index were significantly reduced in the cadaver treatments. Most nematode families responded negatively to cadavers with the notable exceptions of Rhabditidae, Neodiplogasteridae and Diplogasteroididae. The latter two were found exclusively underneath the decomposing cadavers and are promising bioindicators of vertebrate cadaver decomposition. Even though diversity, density and communities were recovering after one year, the impact of cadavers was still significant for the maturity index. These contrasting patterns illustrate how decomposing cadavers contribute to increasing local biodiversity and suggest that soil nematodes could be used as a tool to document the presence of a decomposing cadaver, or to estimate the time elapsed since death (post-mortem interval). Patterns should, however, be compared in different settings and seasons before such a tool can be validated. © 2016 Elsevier Ltd. All rights reserved.

KW - Cadaver decomposition

KW - Community ecology

KW - Post-mortem interval

KW - Soil biodiversity

KW - Temporal patterns

U2 - 10.1016/j.soilbio.2016.09.011

DO - 10.1016/j.soilbio.2016.09.011

M3 - Article

VL - 103

SP - 405

EP - 416

JO - Soil Biology and Biochemistry

JF - Soil Biology and Biochemistry

SN - 0038-0717

ER -