Linking bacteria, volatiles and insects on carrion: the role of temporal and spatial factors regulating inter-kingdom communication via volatiles

Author:

von Hoermann Christian1ORCID,Weithmann Sandra2,Sikorski Johannes3,Nevo Omer245ORCID,Szpila Krzysztof6,Grzywacz Andrzej6ORCID,Grunwald Jan-Eric7,Reckel Frank7,Overmann Jörg3,Steiger Sandra8,Ayasse Manfred2

Affiliation:

1. Department of Conservation and Research, Bavarian Forest National Park, Grafenau, Germany

2. Institute of Evolutionary Ecology and Conservation Genomics, University of Ulm, Ulm, Germany

3. Department of Microbial Ecology and Diversity Research, Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany

4. German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany

5. Institute of Biodiversity, Friedrich Schiller University, Jena, Germany

6. Department of Ecology and Biogeography, Nicolaus Copernicus University, Torun, Poland

7. Bavarian State Criminal Police Office, SG 204, Microtraces/Biology, 80636 Munich, Germany

8. Department of Evolutionary Animal Ecology, University of Bayreuth, Bayreuth, Germany

Abstract

Multi-kingdom community complexity and the chemically mediated dynamics between bacteria and insects have recently received increased attention in carrion research. However, the strength of these inter-kingdom interactions and the factors that regulate them are poorly studied. We used 75 piglet cadavers across three forest regions to survey the relationship between three actors (epinecrotic bacteria, volatile organic compounds (VOCs) and flies) during the first 4 days of decomposition and the factors that regulate this interdependence. The results showed a dynamic bacterial change during decomposition (temperature–time index) and across the forest management gradient, but not between regions. Similarly, VOC emission was dynamic across a temperature–time index and the forest management gradient but did not differ between regions. However, fly occurrence was dynamic across both space and time. The strong interdependence between the three actors was mainly regulated by the temperature–time index and the study regions, thereby revealing regulation at temporal and spatial scales. Additionally, the actor interdependence was stable across a gradient of forest management intensity. By combining different actors of decomposition, we have expanded our knowledge of the holistic mechanisms regulating carrion community dynamics and inter-kingdom interactions, an important precondition for better describing food web dynamics and entire ecosystem functions.

Funder

Deutsche Forschungsgemeinschaft

Publisher

The Royal Society

Subject

Multidisciplinary

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