1 / 22

Yves Basset Smithsonian Tropical Research Institute, Panama, PA (bassety@si)

Museo di Carmagnola. The IBISCA sticky trap programme and focal taxa: Auchenorrhyncha and Agrilus (Hemiptera, Coleoptera). Yves Basset Smithsonian Tropical Research Institute, Panama, PA (bassety@si.edu) Gianfranco Curletti Museum of Carmagnola, Carmagnola, IT

kreeli
Download Presentation

Yves Basset Smithsonian Tropical Research Institute, Panama, PA (bassety@si)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Museo di Carmagnola The IBISCA sticky trap programme and focal taxa: Auchenorrhyncha and Agrilus (Hemiptera, Coleoptera) Yves Basset Smithsonian Tropical Research Institute, Panama, PA (bassety@si.edu) Gianfranco Curletti Museum of Carmagnola, Carmagnola, IT 1Héctor Barrios University of Panama, Panama, PA 2Lukas Cizek Czech Academy of Sciences, Ceske Budejovice, CZ Henri-Pierre Aberlenc CIRAD, Montpellier, FR Maurice Leponce Royal Belgian Institute of Natural Sciences, Brussels, BE 3Anovel Barba University of Panama, Panama, PA 1 2 3

  2. The sticky trap programme Understorey Upper canopy Estimates the flight activity of smaller insects For each of 9 sites in 2003: 25 traps set in the understorey 25 traps set in the upper canopy 3 transects of traps set at 0, 1.3, 7, 14, 21, 28m and top (upper canopy) Traps run for 5 days Replication of two sites (crane) in March, May and October 2004 Total: 993 traps and 54,779 individuals collected Sorted by higher categories (families) with focal taxa extracted Measurements of light and canopy openness near each trap in situ (SRT)

  3. Litter comparable to upper canopy in terms of abundance Hiatus between the upper canopy and the lower foliage Upper canopy: 86.3±3.7 Mid-canopy: 38.2±2.5 Understorey:33.1±1.1 Litter: 70.3±7.6 Flight-intercept traps

  4. (se) 26.8 ±7.99 Patterns of stratification differ between taxonomical and ecological groups For example: Predatory flies, sap-sucking bugs, scavenging flies and wood-boring beetles show different patterns

  5. Positive correlation between arthropod abundance and light, rs = 0.273, P < 0.001 Relationships with canopy openness and leaf density not assessed yet Relationships with remote sensing data not assessed yet

  6. Distribution patterns of homopteran bugs (all sap-suckers) Planthoppers (Fulgoroidea) Leafhoppers (Membracoidea) Treehoppers (Membracoidea) Froghoppers (Cercopoidea) Cicadas (Cicadoidea) Jumping plant lices (Psylloidea) Zammara Enchophora Not considered here: scales, whiteflies and aphids

  7. Collecting effort by method (no. ind.) Total 15,245 homopterans Challenge: To account for different sampling efforts among sampling methods and habitats Biolleyana

  8. Cicadellidae: UND+UPC Aleyrodidae: UPC Cixiidae, Derbidae, Tropiduchidae: UND Membracidae: UPC Psyllidae: UPC Cercopoidea Cicadoidea Fulgoroidea Psylloidea Membracoidea Others Dorisiana Faunal composition per habitat: homopteran families

  9. Species richness No. species Cicadellidae 158 Typhlocybinae 50 Cicadellinae 36 Scarinae 23 Deltocephalinae 14 Derbidae 73 Membracidae 56 Achilidae 28 Cixiidae 18 Delphacidae 17 Flatidae 16 Psyllidae 15 Etc. Total 447 species As of March 2005: 72% of spp. identified to genus 29% of spp. identified to species Collections: NMNH, Washington NHM, London MNHN, Paris Fidicina

  10. Randomized species accumulation curves per habitat Estimates of species richness (Chao1) Lit 126 spp. Und 355 spp. Can 302 spp. Upp Can 289 spp. Rarefaction per 1,000 ind. (Coleman) Und 147 spp. Can 194 spp. Upp Can 146 spp. Canopy Understorey Upper Canopy Litter

  11. CCA of well-represented homopteran species (n = 66,  20 ind.) ordered by sites Total inertia = 1.508 Sum eigenvalues CCA = 1.050 (69% of variance, p = 0.03) Axis 1 & 2 = 60% (42%) of CCA Result similar with sticky traps for first replication (better calibrating but loss of information) Athestia

  12. Summary of species distribution • Criteria: • 97 spp. with ind.  12 • Specialists: 90% of population • concentrated in one strata/site • No. of states identical: 3 strata (L+UND), • sites grouped into 3 larger sites (location) No. of extreme specialists: 9 (9%) No. of strata specialists: 30 (31%) No. of site specialists: 12 (12%) No. of extreme generalists: 37 (38%) Extreme specialists uncommon When specialization occurs, more likely to be related to strata (habitat) than site But need to refine analyses (habitat definition) Correlation between site occupancy and population size

  13. Comments on the genus Agrilus Curtis, 1825 • Xylophagous insects • Among largest living genera with 2,500 • living species • 1,200 known species in the Neotropics • Actually 58 spp. known for Panama Agrilus n. sp.

  14. Collecting methods used (efficient results in red) Agrilus n. sp. • Rearing of xylophagous larvae • Lure traps for bees • Berlese-Tullgren • Winkler extractors • Beating tray • Hand collecting/netting • Pitfall traps • Windows traps (ground and aerial) • Sticky traps • Light traps • Malaise traps • Fogging

  15. %METHODS Agrilus jenningsi

  16. sp. fogging sticky trap window trap hand coll. canopy soil A. basilaris 3 3 A. confusus 1 1 A. jenningsi 1 1 A. raventazonus 3 3 A. turrialbensis 1 1 A. viridicephalus 5 5 A. crapulellus 1 1 A. n. sp. 1 2 1 2 1 A. n. sp. 2 2 2 2 2 A. n. sp. 3 6 12 1 19 A. n. sp. 4 1 1 A. n. sp. 5 1 1 A. n. sp. 6 1 1 A. n. sp. 7 1 1 A. n. sp. 8 2 2 A. n. sp. 9 3 3 A. n. sp. 10 4 4 A. n. sp. 11 1 1 A. n. sp. 12 1 1 TOT 10 41 1 4 25 31 Captures 56 specimens belonging to 19 species

  17. sp. fogging sticky trap window trap hand coll. canopy soil A. basilaris 3 3 A. confusus 1 1 A. jenningsi 1 1 A. raventazonus 3 3 A. turrialbensis 1 1 A. viridicephalus 5 5 A. crapulellus 1 1 A. n. sp. 1 2 1 2 1 A. n. sp. 2 2 2 2 2 A. n. sp. 3 6 12 1 19 A. n. sp. 4 1 1 A. n. sp. 5 1 1 A. n. sp. 6 1 1 A. n. sp. 7 1 1 A. n. sp. 8 2 2 A. n. sp. 9 3 3 A. n. sp. 10 4 4 A. n. sp. 11 1 1 A. n. sp. 12 1 1 TOT 10 41 1 4 25 31 Understorey/canopy

  18. tot sp observed 19 sp in 1 ex. 10 sp in 2 exx. 1 sp in 3 exx. 4 sp in 4 exx. 2 sp in 5 exx. 1 interpolated 58.37 std error 14.36 No. of species expected with the Burnham & Overton method Agrilus basilaris

  19. Conclusions - Sticky traps • Each collecting method is biased towards particular group/species, • with concomitant problems in the analysis of spatial patterns • More activity at the level of the litter and upper canopy • Gap in arthropod activity between the upper canopy and lower foliage • Patterns of stratification differ among taxonomical and ecological • groups • Incident light along the vertical profile is a good predictor of • arthropod abundance (but there may be better variables)

  20. Conclusions - homopteran bugs • Stratification is obvious at the level of families, subfamilies and species • More species collected in the understorey, rarefaction similar for • understorey and upper canopy; mid-canopy enriched • Fungal/root feeders > understorey, meristem feeders > upper canopy • Distance (floristic composition, NDVI?) and illumination of sites • important, not the number of plant species per se • Extreme specialists not common, specialization more towards • strata than site

  21. Conclusions - Agrilus • Needs for specialized techniques • for some groups, such as Agrilus • Agrilus fauna very poorly known • in Panama • The Agrilus fauna of the canopy is • poorer than expected • The Agrilus fauna in the understorey is • richer than the canopy, both in specimens • and in species • Importance of tree-fall gaps • for biodiversity Tree-fall gap in S. Lorenzo Agrilus n. sp.

  22. Acknowledgements: our sponsors, the IBISCA team and taxonomic help: D. Burckhardt, S. McKamey, L. O’Brien, C. Simon & M. Webb Part of IBISCA participants during the field replication of May 2004

More Related