Browsing by Author "Gordillo Lema, Nely Alexandra"

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    Monitoreo de las especies y hospederos alternativos de los géneros anastrepha y ceratitis en los cantones Gualaceo, Chordeleg y Sigsig de la provincia del Azuay
    (2016) Gordillo Lema, Nely Alexandra; Pizarro Sigcha, Fabián Patricio; Larriva Coronel, Walter Iván
    The monitoring of the species and alternative hosts of the genera Anastrepha Schiner and Ceratitis Wied in Gualaceo, Chordeleg and Sigsig, all cantons of the province of Azuay is important for the management of this pest. The research was conducted from September 2014 to August 2015, using 20 McPhail traps and Jackson traps placed in 20 significant orchards. The results were the identification of the following 8 species of fruit flies:.A. fraterculus Wied., A. distincta Greene, A. grandis Macquart, A. striata Schiner, A. obliqua Macquart, A. serpentina Wied., A. spp. y Ceratitis capitata Wied. By calculating the average fly / trap / day (MTD) it was noted that the increase in population occurs from February to August concurrent with the fruiting stage of cultivated and / or wild hosts. The highest MTD found belongs to the canton of Gualaceo with 3.20 followed by Chordeleg at 1.90 and Sigsig at 0.97. Among the cultivated and / or wild hosts these fruit flies were determined: Prunus Persica L., Annona cherimola M., Psidium guajava M., Citrus sinensis O., Inga edulis M., Juglans neotropica D., Myrtus communis L. y Citrus reticulata B.
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    Regeneración de árboles en ecosistemas naturales y plantaciones de Pinus patula (Pinaceae) dentro de un gradiente altitudinal andino (Azuay, Ecuador)
    (2019) Jadán Maza, Ángel Oswaldo; Cedillo Tapia, Hugo Alberto; Zea Dávila, Pedro René; Bermúdez, Fernando Gerardo; Díaz Granda, Lourdes Elizabeth; Pillacela Chin, Jenny Priscila; Guallpa Tenemaza, Dario Javier; Gordillo Lema, Nely Alexandra; Arciniegas Fárez, Andrés Eduardo; Vaca Vaca, Carlos Miguel; Quizhpe Coronel, Wilson
    Andean forests and paramo have high species richness, but constantly they are threatened by deforestation. Natural arboreal regeneration of these ecosystems will condition their structure and functionality in the future, but now it has been poorly evaluated. In the Andes of Southern Ecuador, there are also abandoned Pinus patula (pine) forest plantations, which could be scenarios to promote natural regeneration. In an Andean altitudinal gradient, we evaluated floristically parameters of tree regeneration between two study scenarios: natural ecosystems (herbaceous paramos and natural forests) and pine plantations. For this, the diversity of regeneration was described by species richness, Shannon index and floristic composi-tion. Abundance with the number of individuals; these parameters were compared between two scenarios. We determined also that environmental variables or predictors of: canopy cover, soil, tree structure, horizontal dis-tance and physiographic explained the variation in the parameters of regeneration with greater magnitude. For this, a partition analysis of the variation was carried out. Richness and diversity of species were greater in natural ecosystems, whereas floristic composition was different and its abundance was similar. In natural ecosystems, basal area and tree density explained mainly the variation in wealth, diversity and abundance. Not so in pine plantations where horizontal distance to the native forests was the predictor that mostly explained. The greatest diversity of regeneration in natural ecosystems (forests) is associated with the existence of arboreal, shrub and seed biotypes. It is adding to this, efficiency in dispersion processes at the micro-habitat level. These aspects are limiting in plantations of pine, in which the dispersion or availability of seeds depends on the proximity to natural ecosystems