Changes in the diversity and composition of trophic groups of protists by transformation of rainforest to plantation systems

Protists, abundant but enigmatic single-celled eukaryotes, are important soil microbiota providing numerous ecosystem functions. Despite their ubiquity, these organisms often go unnoticed and underappreciated. However, understanding the activities and ecological roles of protists is crucial.

Protists Garvin Schulz B08
Various protists.

Within my research, I specifically concentrate on the diversity, community structure, and ecological functions of protists in the soil of tropical ecosystems. In the B08 project, my investigation revolves around examining the effects of land-use transformation, specifically the conversion of rainforests into oil palm, rubber, and jungle rubber plantations, on various trophic groups of protists.
Within trophic groups individual taxa generally respond in a similar way, suggesting that trophic groups of protists reflect general patterns in changes in the structure of the micro-decomposer food web with conversion of rainforest into plantation systems.

DFA_of_five_trophic_groups_of_protists
Discriminant function analyses of five trophic groups of protists (A) phagotrophs, (B) animal parasites, (C) photoautotrophs, (D) plant parasites, (E) symbionts, and of undetermined protists (F) from four land-use systems.
Publications
  • Wang S, Schneider D, Hartke TR, Ballauff J, Moura CCM, Schulz G, Li Z, Polle A, Daniel R, Gailing O, Irawan B, Scheu S, Krashevska V (2024) Optimising high-throughput sequencing data analysis, from gene database selection to the analysis of compositional data: a case study on tropical soil nematodes. Frontiers in Ecology and Evolution 12:1168288 doi.org/10.3389/fevo.2024.1168288
  • Schulz G, Camenzind T, Sánchez-Galindo LM, Schneider D, Scheu S, Krashevska V (2023) Response of protists to nitrogen addition, arbuscular mycorrhizal fungi manipulation, and mesofauna reduction in a tropical montane rainforest in southern Ecuador. Eukaryotic Microbiology 70: e12996 doi.org/10.1111/jeu.12996
  • Schulz G, Schneider D, Brinkmann N, Edy N, Daniel R, Polle A, Scheu S and Krashevska V (2019) Changes in trophic groups of protists with conversion of rainforest into rubber and oil palm plantations. Frontiers in Microbiolology 10:240. doi:10.3389/fmicb.2019.00240
  • Schulz G, Maraun M, Völcker E, Scheu S, Krashevska V. (2018) Evaluation of morphological characteristics to delineate taxa of the genus Trigonopyxis (Amoebozoa, Arcellinida). Protist 169: 190–205. doi:10.1016/j.protis.2018.02.005
  • Krause A, Pachl P, Schulz G, Lehmitz R, Seniczak A, Schaefer I, Scheu S, Maraun M. (2016) Convergent evolution of aquatic life by sexual and parthenogenetic oribatid mites. Experimental and Applied Acarology 70: 439-453. doi:10.1007/s10493-016-0089-3
  • Pachl P, Domes K, Schulz G, Norton RA, Scheu S, Schaefer I, Maraun M. (2012) Convergent evolution of defense mechanisms in oribatid mites (Acari, Oribatida) shows no “ghosts of predation past”. Molecular phylogenetics and evolution 65: 412-420. doi:10.1016/j.ympev.2012.06.030
  • Aßhauer K, Schulz G, Gieshold M, Baumann T, Rex R, Zhang H, Gültas M, (2010) Projekt Promotoranalyse, in: Körner M-C, Schöbel A (Eds.), Gene, Graphen, Organismen Modellierungs- und Analysemethoden in der Systembiologie. Shaker Verlag, Aachen, pp. 149–158.
  • Maraun M, Erdmann G, Schulz G, Norton RA, Scheu S, Domes K. (2009) Multiple convergent evolution of arboreal life in oribatid mites indicates the primacy of ecology. Proceedings of the Royal Society of London Series B-Biological Science 276: 3219–3227. doi:10.1098/rspb.2009.0425