Abstract

MARTINEZ, Omar  and  VILLARTE, Fernando. Dasometric structure of the plants of Polylepis besseri incarum patch and associated avifauna in the Sun Island (Titicaca Lake, La Paz - Bolivia). Ecología en Bolivia [online]. 2009, vol.44, n.1, pp.36-49. ISSN 1605-2528.

Based on census and diameter measurements of tree main trunks methods, the dasometric structure of a Polylepis besseri incarum patch was studied. With mist netting, direct observation and random walks methods, the avifauna composition associated to P. b. incarum in Japapi, Isla del Sol, Lago Titicaca (Bolivia) was determined. Complementary observations on the conservation status of P. b. incarum patches in the localities Yumani (Isla del Sol) were applied. A total of 156 plants of P. b. incarum were counted. The proportion of young plants (2 cm of diameter) was low (24 individuals). While adult plants (>32 cm of diameter) were frequent with 54 individuals. Plants of medium size with diameters between 4-16 cm were dominant (78 individuals). A total of 29 species of birds in Polylepis forest’s affinity category was found. The black-throated Flowerpiercer (Diglossa brunneiventris) is a new record and also a new departmental (La Paz) record; and the Cinereus Conebill (Conirostrum cinereum) was considered rare in this region.

Keywords : Avifauna; Polylepis patches; Titicaca Lake; Bolivia.

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