Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Host-driven population dynamics in an herbivorous insect.

T Ylioja1, H Roininen, M P Ayres

  • 1Punkaharju Research Station, Finnish Forest Research Institute, FIN-58450 Punkaharju, Finland. tiina.ylioja@metla.fi

Proceedings of the National Academy of Sciences of the United States of America
|September 15, 1999
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Space and Shelter Requirement of Nymphs in the Mass-Rearing of the Edible Ruspolia differens (Orthoptera: Tettigoniidae).

Journal of economic entomology·2019
Same author

Optimal Temperature for Rearing the Edible Ruspolia differens (Orthoptera: Tettigoniidae).

Journal of economic entomology·2018
Same author

Temperature affects phenological synchrony in a tree-killing bark beetle.

Oecologia·2018
Same author

Attack rates of Sirex noctilio and patterns of pine tree defenses and mortality in northern Patagonia.

Bulletin of entomological research·2018
Same author

Slight tissue wounding fails to induce consistent chemical defense in three willow (Salix spp.) clones.

Oecologia·2017
Same author

Variability in grape phylloxera preference and performance on canyon grape (Vitis arizonica).

Oecologia·2017
Same journal

Chemotactic self-organization captures the dynamics of mammalian hair follicle patterning.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same journal

Tomographic imaging of superconducting order using particle-hole interference.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same journal

Inhibitory potential of autologous neutralizing antibodies sets quantitative limits on the rebound-competent HIV-1 reservoir.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same journal

Inferring epidemiological parameters under an infectious phylogeography model with visitor dynamics.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same journal

Analytical modeling for suction cup designs for skin-interfaced wearable devices.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same journal

Improving cell-free metabolism through direct integration of artificial respiratory chains.

Proceedings of the National Academy of Sciences of the United States of America·2026
See all related articles

Ecological population dynamics are primarily driven by external factors like host plant availability, not internal density-dependent regulation. This study reveals that Phytobia betulae insect abundance is mainly influenced by birch stand age and tree health.

Area of Science:

  • Ecology
  • Population Dynamics
  • Insect Ecology

Background:

  • Understanding endogenous (density-dependent) and exogenous (density-independent) effects on population dynamics is crucial.
  • Previous studies lacked long time series and combined resource data, especially for herbivores.
  • Comparing bottom-up (resources) and top-down (enemies) effects in herbivores is challenging.

Purpose of the Study:

  • To investigate the relative importance of endogenous and exogenous factors on the population dynamics of the wood-mining insect Phytobia betulae.
  • To combine long-term insect abundance data with host plant resource measurements.

Main Methods:

  • Utilized feeding scars on birch tree annual rings to obtain 47-65 year time series of Phytobia betulae abundance (larvae/tree).
  • Collected matching time series data on host tree age and physiological status from annual rings.

Related Experiment Videos

  • Analyzed temporal variation in insect abundance in relation to stand age and tree characteristics.

    • Main Results:

    • Exogenous effects of stand age significantly explained insect abundance variation (58% and 32% in two populations).
    • Exogenous bottom-up effects of host plants accounted for 77% and 64% of total abundance variance.
    • Endogenous density dependence explained only ~10% of the total variance.

    Conclusions:

    • Phytobia betulae abundance is primarily determined by exogenous factors, specifically host plant availability influenced by disturbance history and stand age.
    • Density dependence plays a secondary role, regulating populations around levels set by host suitability.
    • The study highlights the dominant role of external resource availability in structuring herbivore populations.