INVESTIGADORES
POLITI Natalia
artículos
Título:
Identification of tree groups used by Secondary Cavity-nesting Birds to simplify forest management in subtropical forests
Autor/es:
SCHAAF, ALEJANDRO; RUGGERA, ROMAN; TALLEI, EVER; VIVANCO, CONSTANZA; RIVERA LUIS; POLITI NATALIA
Revista:
Journal of Forestry Research
Editorial:
SPRINGER
Referencias:
Año: 2019
ISSN:
1007-662X
Resumen:
In tropical and subtropical forest ecosystems, decay-formed cavities are a key and scarce resource for secondary cavity-nesting birds a group that is highly sensitive to logging. The Piedmont forest of northwestern Argentina is a complex an ecosystem with 113 trees and 120 bird species. It has high logging pressure on the few, well-conserved remnants, complicating the delineation of sustainable management guidelines for each tree or bird species in a short period of time. Our objective was to reduce the complexity of subtropical forests by grouping tree species according to the characteristics used by secondary cavity-nesting birds. In the Piedmont forest, 50 plots of 0.25 ha were sampled to record cavity trees and cavity characteristics. These were then used in cluster analysis to form tree groups. Additionally, cavity searches were conducted to identify the bird species using the secondary cavity-nests. A total of 187 cavity trees of 23 tree species were recorded and these formed four tree groups or clusters. We recorded 86 cavities that were used by secondary cavity-nesting bird species. The four tree groups were unequally used by secondary cavity nesters. The tree group that included valuable timber species (Myroxylon peruiferum, Anadenanthera colubrine and Calycophyllum multiflorum) and had the greatest cavity availability had 71% of total cavity use. A subsequent tree group had valuable timber species (Cedrela balansae and Amburana cearensis), measured >73 cm DBH and>21 m height, had cavity entrances measuring >0.10 cm2; and it had 14% of all cavity useby birds. A third group had no highly economically valuable tree species, included the snag category, and had 15% of cavity use. The fourth tree group had DBH