Diversity and abundance of macroinvertebrates in the Bosque Protector Cerro Blanco

Study Extent

The Condor, Guitarra, Canoa, Quebrada 507, Pantano and Pigio streams located in Cerro Blanco were sampled.

Sampling

Laboratory analysis
In the laboratory, the organisms were washed and separated from the sediment, then the organisms were analysed, separated and identified to the level of major groups (Phylum) through stereomicroscopes and microscopes; these samples were transferred to 25 cc flasks and preserved with 80% alcohol. Only organisms that presented complete morphological structures were analysed for identification down to the lowest possible taxonomic level (genus or species), for which taxonomic keys specific to the region were used, such as: Holthuis (1952); Roldán (1988); Pennak (1989); Thorp J. P. Covich (1994); Ituarte (1995); Klemm (1995); Springer (2006); Domínguez (2009). Identified specimens were labelled and stored in 25 cc glass jars.

Method steps

1. For sample collection, the D-net hand net with a 500 u mesh eye attached to an aluminium handle was used to capture organisms present in the water column, vegetation and boulders in inland waters; this net was used to sweep along the vegetated banks for 30 minutes in an area of approximately 10 m2. Vegetation and small stones were manually removed, allowing for the trapping of organisms attached to roots, stems, submerged leaves and those inhabiting under rocks, which allowed for qualitative analysis (Roldán 1988).

N/A

1. Hyalellidae
   rank: family
2. Stratiomidae
   rank: family
3. Coleoptera
   rank: order
4. Odonata
   rank: order
5. Tanyderidae
   rank: family
6. ANIMALIA
   rank: kingdom
7. Diptera
   rank: order
8. Ephemeroptera
   rank: order
9. Elmidae
   rank: family
10. Pseudothelphusidae 
    rank: family
11. Amphipoda
    rank: order
12. Syrphidae
    rank: family
13. Decapoda
    rank: order
14. Leptophlebiidae
    rank: family
15. Megapodagrionidae
    rank: family
16. Dytiscidae
    rank: family
17. Chironomidae
    rank: family
18. Hydrophillidae
    rank: family
19. Coenagrionidae
    rank: family
20. Cordullidae
    rank: family

The Condor, Guitarra, Canoa, Quebrada 507, Pantano and Pigio streams located in Cerro Blanco were sampled. At each site, three replicates were made at the lower. The sampling sites were photographed to obtain a visual description of the study sites.