Have a personal or library account? Click to login

Opinions and Suggestions on Nematode Faunal Analysis

Journal of Nematology
Volume 56 (2024): Issue 1 (March 2024)
By:
Open Access
|Dec 2024

Figures & Tables

Figure 1:

A: Nematode Faunal Analysis Model per Ferris et al., 2001) with sample data for four locations; B: Components of an Herbivore Index; C: Emended Faunal Analysis Model with Herbivore Index incorporated with sample data for four locations.
A: Nematode Faunal Analysis Model per Ferris et al., 2001) with sample data for four locations; B: Components of an Herbivore Index; C: Emended Faunal Analysis Model with Herbivore Index incorporated with sample data for four locations.

Figure 2:

A: Effect on Enrichment Index of resource diminution over 9 months (data from Ferris and Matute, 2003); B: Succession in the Enrichment and Structure Footprint for 2 years following resource amendment. Based on a field trial by Dr. James Downer, Hansen Research and Extension Center, Ventura County, California.
A: Effect on Enrichment Index of resource diminution over 9 months (data from Ferris and Matute, 2003); B: Succession in the Enrichment and Structure Footprint for 2 years following resource amendment. Based on a field trial by Dr. James Downer, Hansen Research and Extension Center, Ventura County, California.

Figure 3:

A: Hypothetical effects of primary forest clearing; letters indicate expected locations of the intersection of enrichment and structure trajectories after the disturbances, W: residual primary forest, X: secondary forest, Y: tree plantation, Z: pasture; B: Actual Faunal Analysis of residual primary forest, secondary forest, tree plantation and pasture.; C: Hypothetical auto-regeneration of enrichment and structure indicator components of the soil food web after a major disturbance, note time scale differences; D: Consistency of c-p 4 and 5 taxa 3 to 30 years after a disturbance as a percentage of those in primary forest. Data from Varela-Benavides et al. (2022).
A: Hypothetical effects of primary forest clearing; letters indicate expected locations of the intersection of enrichment and structure trajectories after the disturbances, W: residual primary forest, X: secondary forest, Y: tree plantation, Z: pasture; B: Actual Faunal Analysis of residual primary forest, secondary forest, tree plantation and pasture.; C: Hypothetical auto-regeneration of enrichment and structure indicator components of the soil food web after a major disturbance, note time scale differences; D: Consistency of c-p 4 and 5 taxa 3 to 30 years after a disturbance as a percentage of those in primary forest. Data from Varela-Benavides et al. (2022).

Sample calculation of Herbivore Index, HI = (100 (Σ hci ni) / (hc6 Σ ni) for integration with Emended Nematode Faunal Analysis Model – Figs_ 1 B,C)

GenusFunctional ClassSample Abundance niWeight hciWeighted. Abundance hci*ni
Tylenchorhynchushc2 Migratory ectoparasites540.0080.432
Pratylenchushc3 Migratory endoparasites130.58142.423
Belonolaimushc4 Sedentary ectoparasites730.6567.872
Rotylenchulushc5 Semi-endoparasites120.1281.664
Meloidogynehc6 Sedentary endoparasites4534.9421572.39
Total Abundance (Σ ni) 197
Total Weighted Abundance (Σ hci ni) 1624.77
Herbivore Index (100 (Σ hci ni) / (hc6 Σ ni)) 23.60

Herbivore impact channel in Nematode Faunal Analysis with damage potential based on the average body mass of adult females in each h-c category (Fig_ 1B) (Body mass data from Nemaplex accessed June 2024)_

h-c categoryFemale Body Mass μg hciNumber of observations
1. Root hair feeders0.031483
2. Migratory ectoparasites0.008274
3. Migratory endoparasites0.581350
4. Sedentary ectoparasites0.6561012
5. Semi-endoparasites0.128412
6. Sedentary endoparasites34.942606
DOI: https://doi.org/10.2478/jofnem-2024-0049 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X
Journal RSS Feed
Language: English
Submitted on: Jul 8, 2024
Published on: Dec 24, 2024
Published by: Society of Nematologists, Inc.
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
Food web enrichment,
structure,
functions,
services,
succession,
auto-regeneration,
herbivory,
faunal analysis
Related subjects:
Life sciences,
Life sciences, other

© 2024 Howard Ferris, Ingrid Varela Benavides, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

Previous articleVolume 56 (2024): Issue 1 (March 2024)Next article