Inter- and intraspecific consumer trait variations determine consumer diversity effects in multispecies predator−prey systems

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

  • Sabine Flöder
  • Lara Bromann
  • Stefanie Moorthi

This study investigated how inter- and intraspecific trait variations determine consumer diversity loss effects in a short-term microcosm experiment, using consumer and prey biovolume production and composition as the main response variables. Three levels of ciliate diversity were created, all feeding on a 3-species microalgal prey mixture. Ciliates differed in consumer specialisation, feeding on 1 (specialist, S), 2 (intermediate, I) or all 3 (generalist, G) microalgal species. Intraspecific trait variation was incorporated by including 3 different clones of I and setting up ciliate combinations with either monoclonal or polyclonal populations of I. Both increasing inter- and intraspecific consumer diversity increased total ciliate biovolume. On the species level, total ciliate biovolume was high wherever G was included, indicating a positive selection effect for a competitively superior species. Polyclonal I monocultures exceeded the biovolume of all monoclonal ones (transgressive overyielding) based on complementary differences of clone-specific feeding niches. This effect was also observed in multispecies combinations. Both inter- and intraspecific consumer diversity decreased prey evenness. Despite being able to feed on all prey species, G displayed specific grazing preferences within its dietary niche. Furthermore, G exhibited an induced offence, forming giant cells that fed on other ciliates. S responded with an inducible defence, escaping predation by the intraguild predator. Overall, our study demonstrated highly complex trophic interactions driven by consumer selectivity, grazing rates, selective feeding and phenotypic plasticity, and indicated that both inter- and intraspecific consumer trait variations determine the consequences of consumer diversity loss on ecosystem functioning.

OriginalspracheEnglisch
ZeitschriftAquatic Microbial Ecology
Jahrgang81
Ausgabenummer3
Seiten (von - bis)243-256
Anzahl der Seiten14
ISSN0948-3055
DOIs
PublikationsstatusErschienen - 16.05.2018

DOI

Zuletzt angesehen

Publikationen

  1. Finding the Best Match — a Case Study on the (Text‑) Feature and Model Choice in Digital Mental Health Interventions
  2. Does Job Satisfaction Adapt to Working Conditions?
  3. “It is not the CO2 itself, it’s the imbalance!”
  4. Managing technology as a virtual enterprise
  5. Trusting as a 'Leap of Faith': Trust-Building Practices in Client-Consultant Relationships
  6. Approaching the other
  7. Monitoring of methotrexate chlorination in water
  8. Imagined Networks: Race, Digital Media and the University
  9. Acceleration as process
  10. The first observation of honeydew foraging in army ants since 1933
  11. To Row Together or Paddle One's Own Canoe? Simulating Strategies to Spur Digital Platform Growth
  12. 'Crawling Jurisdiction'
  13. Two high-mountain burnet moth species (Lepidoptera, Zygaenidae) react differently to the global change drivers climate and land-use
  14. Patterns of organizational (sub)culture and their influence on organizational effectiveness
  15. (Inhibiting) Factors for (Un)Sustainable Behaviour in Relation to the Effects of Education for Sustainable Development
  16. archiDART v3.0
  17. The relation of mindfulness and prosocial behavior
  18. Dimension theoretical properties of generalized Baker's transformations
  19. Circularity in green chemical products, processes and services
  20. Fat or lean
  21. Das Nordfenster
  22. Schreiben und Medien - Medienspezifische Schreibprozesse
  23. New incremental methods for springback compensation by stress superposition
  24. Der Mord am Weihnachtsmann
  25. Strategizing in NPOs
  26. Nomadische Treibhäuser
  27. Remote control of a soft walking robot
  28. Nach Bourdieu
  29. Umsteuern erforderlich
  30. With a little help from my website. Firm survial and web presence in times of COVID-19 - Evidence from 10 European Countries
  31. Nachhaltigkeitstrends im Management
  32. Effects of Mn and Zn solutes on grain refinement of commercial pure magnesium
  33. Stilfragen
  34. Selbst und Identität
  35. Inkorporationskunst
  36. Interpersonal Psychotherapy for Mental Health Problems
  37. Topophilie
  38. Patterns of organizational (sub)culture and their influence on organizational effectiveness
  39. Internet-Supported Sustainability Reporting
  40. Digital health literacy, online information-seeking behaviour, and satisfaction of Covid-19 information among the university students of East and South-East Asia
  41. Der Schleier der Pierrette
  42. Popular music in ex-Yugoslavia between global participation and provincial seclusion
  43. We seem to play the platonic tape backwards
  44. Klimaschutz: Auch ein Alleingang der EU ist richtig
  45. Medienästhetik
  46. Influence of Nd in extruded Mg10Gd base alloys on fatigue strength
  47. Fantasierealisierung, Theorie

Presse / Medien

  1. Computersimulation