PMID- 30795747 OWN - NLM STAT- MEDLINE DCOM- 20190531 LR - 20231006 IS - 1472-6785 (Electronic) IS - 1472-6785 (Linking) VI - 19 IP - 1 DP - 2019 Feb 22 TI - Protura are unique: first evidence of specialized feeding on ectomycorrhizal fungi in soil invertebrates. PG - 10 LID - 10.1186/s12898-019-0227-y [doi] LID - 10 AB - BACKGROUND: Ectomycorrhizal fungi (ECM) play a central role in nutrient cycling in boreal and temperate forests, but their role in the soil food web remains little understood. One of the groups assumed to live as specialised mycorrhizal feeders are Protura, but experimental and field evidence is lacking. We used a combination of three methods to test if Protura are specialized mycorrhizal feeders and compared their trophic niche with other soil invertebrates. Using pulse labelling of young beech and ash seedlings we analysed the incorporation of (13)C and (15)N into Acerentomon gallicum. In addition, individuals of Protura from temperate forests were collected for the analysis of neutral lipid fatty acids and natural variations in stable isotope ratios. RESULTS: Pulse labelling showed rapid incorporation of root-derived (13)C, but no incorporation of root-derived (15)N into A. gallicum. The transfer of (13)C from lateral roots to ectomycorrhizal root tips was high, while it was low for (15)N. Neutral lipid fatty acid (NLFA) analysis showed high amounts of bacterial marker (16:1omega7) and plant marker (16:0 and 18:1omega9) fatty acids but not of the fungal membrane lipid 18:2omega6,9 in A. gallicum. Natural variations in stable isotope ratios in Protura from a number of temperate forests were distinct from those of the great majority of other soil invertebrates, but remarkably similar to those of sporocarps of ECM fungi. CONCLUSIONS: Using three in situ methods, stable isotope labelling, neutral lipid fatty acid analysis and natural variations of stable isotope ratios, we showed that Protura predominantly feed on mycorrhizal hyphae via sucking up hyphal cytoplasm. Predominant feeding on ectomycorrhizal mycelia by Protura is an exception; the limited consumption of ECM by other soil invertebrates may contribute to carbon sequestration in temperate and boreal forests. FAU - Bluhm, Sarah L AU - Bluhm SL AD - J.F. Blumenbach Institute of Zoology and Anthropology, Animal Ecology, University of Gottingen, Untere Karspule 2, 37073, Gottingen, Germany. szieger@gwdg.de. FAU - Potapov, Anton M AU - Potapov AM AD - J.F. Blumenbach Institute of Zoology and Anthropology, Animal Ecology, University of Gottingen, Untere Karspule 2, 37073, Gottingen, Germany. AD - Russian Academy of Sciences, A.N. Severtsov Institute of Ecology and Evolution, Leninsky Prospect 33, Moscow, 119071, Russia. FAU - Shrubovych, Julia AU - Shrubovych J AD - Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, ul. Slawkowska 17, 31-016, Krakow, Poland. AD - State Museum of Natural History, Ukrainian Academy of Sciences, Teatral'na St. 18, L'viv, UA 79008, Ukraine. AD - Institute of Soil Biology, Biology Centre of Czech Academy of Sciences, Na Sadkach 7, 370 05, Ceske Budejovice, Czech Republic. FAU - Ammerschubert, Silke AU - Ammerschubert S AD - Busgen Institute, Forest Botany and Tree Physiology, University of Gottingen, Busgenweg 2, 37077, Gottingen, Germany. FAU - Polle, Andrea AU - Polle A AD - Busgen Institute, Forest Botany and Tree Physiology, University of Gottingen, Busgenweg 2, 37077, Gottingen, Germany. FAU - Scheu, Stefan AU - Scheu S AD - J.F. Blumenbach Institute of Zoology and Anthropology, Animal Ecology, University of Gottingen, Untere Karspule 2, 37073, Gottingen, Germany. AD - Centre of Biodiversity and Sustainable Land Use, University of Gottingen, Von-Siebold-Str. 8, 37075, Gottingen, Germany. LA - eng SI - figshare/10.6084/m9.figshare.7687484 PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190222 PL - England TA - BMC Ecol JT - BMC ecology JID - 101088674 RN - 0 (Carbon Isotopes) RN - 0 (Nitrogen Isotopes) RN - 0 (Nitrogen-15) RN - FDJ0A8596D (Carbon-13) SB - IM MH - Animals MH - Arthropods/*physiology MH - Carbon Isotopes/analysis MH - Feeding Behavior MH - *Food Chain MH - Forests MH - Germany MH - *Mycorrhizae/chemistry MH - Nitrogen Isotopes/analysis MH - Soil Microbiology PMC - PMC6387494 OTO - NOTNLM OT - Acerentomon OT - Carbon OT - Carbon sequestration OT - Mycorrhiza OT - Nitrogen OT - Nutrition biology OT - Pulse labelling OT - Rhizosphere OT - Stable isotopes OT - Temperate forests EDAT- 2019/02/24 06:00 MHDA- 2019/06/01 06:00 PMCR- 2019/02/22 CRDT- 2019/02/24 06:00 PHST- 2018/07/19 00:00 [received] PHST- 2019/02/12 00:00 [accepted] PHST- 2019/02/24 06:00 [entrez] PHST- 2019/02/24 06:00 [pubmed] PHST- 2019/06/01 06:00 [medline] PHST- 2019/02/22 00:00 [pmc-release] AID - 10.1186/s12898-019-0227-y [pii] AID - 227 [pii] AID - 10.1186/s12898-019-0227-y [doi] PST - epublish SO - BMC Ecol. 2019 Feb 22;19(1):10. doi: 10.1186/s12898-019-0227-y.