Home Institution

University of Colorado

Publication Date

Spring 2017

Program Name

Ecuador: Comparative Ecology and Conservation

Abstract

En el Sur de Ecuador, hay una historia larga de incendio que está asociada con la historia de la agricultura y ganadería a causa de las técnicas de tala y quema para despejar áreas para campos y también quemaduras intencionales para fertilizar los suelos y mejorar productividad agrícola (Fernandez et al 2015). En los últimos días de Noviembre de 2016, un incendio quemó campos, la Reserva Madrigal de Podocarpus, y parte del Parque Nacional Podocarpus en Loja, Ecuador—el enfoque de este estudio. En este estudio: (1) se registraron las especies y distribución de plantas pioneras y sobrevivientes, (2) la se calculó la diversidad de plantas vasculares y (3) se hicieron comparaciones entre las áreas de Páramo antropogénico y también entre las áreas arbustivas. Se ubicaron los cuadrantes en cuatro áreas: (1) área arbustiva no quemada, (2) área arbustiva quemada, (3) Páramo antropogénico frecuentemente quemado, (4) y Páramo antropogénico no frecuentemente quemado. Era cinco cuadrantes de diez por dos en cada área. En cada cuadrante se registraron: la identificación de especie, el numero de individuos por especie, la ubicación general dentro de cuadrante, la cobertura de cada especie, el nivel de herbívoria y si la especie parece como una sobreviviente del incendio, o es una pionera. Para analizar diversidad se usaron el Sorenson Indice y el Exponential Shannon Weiner Entropy (Jost, 2006). Se usaron iNext y SpadeR también para determinar la cobertura de la muestra y predecir especies no ya encontradas. Se encontró una perdida grande de diversidad significativa estadísticamente en la área arbustiva y una composición de especies muy diferente del área abusiva no quemada. En todos áreas quemadas hubo muchas plantas sobrevivientes. No era una diferencia grande de diversidad entre los áreas del Páramo. En la área arbustiva, era una dominancia del helecho invasora Pteridium arachnoideum. Este estudio recomienda investigación continuado sobre los impactos de salud de Pteridium arachnoideum, la calidad de agua en la área del incendio, un analisis sobre el suelo en la reserva, y un estudio del largo plazo sobre la regeneración.

\

In Southern Ecuador there is a long history of fire that is strongly associated with the practice of agriculture due to the common use of slash and burn as means to clear fields for farming as well as a means to refertilizes soil for improved agricultural productivity. In the last few days of November of 2016, there was a large fire that burned not only private land and fields, but also 60hectares the the ecological reserve of Reserva Madrigal de Podocarpus in Loja, Ecuador. This si the focus of this study. In this study (1) the species and distribution of pioneer and surviving plants were categorized, (2) the diversity of vascular plants in four different vegetation types was calculated, (3) and comparisons were made between the áreas of anthropogenic Páramo and the shrub áreas. Quadrats were located in the following four áreas: (1) unburned shrub área, (2) burned shrub área, (3) anthropogenic Páramo frequently burned, (4) and anthropogenic Páramo rarely burned. There were five quadrants for each área measuring ten per two meters in size. In each quadrat the following was recorded: the species identification, abundance, coverage, herbivoy, and if the species was primarily a survivor of the fire or a pioneer plant. To analyze diversity this study used the Sorenson Index and the Exponential Shannon Weiner Entropy (Jost, 2006). iNext and SpadeR were also used in order to determine sample coverage and predict remaining unfound species (Chao et al., 2016 iNext, Chao et al., 2015 SpadeR). A large loss of diversity was found in the burned shrub área that was found to be statistically significant. Species composition differed greatly between these two sites as well. In all áreas there were many surviving plants. There was not a big difference in diversity between the áreas of the Páramo. Finally, in the shrub área there was a dominance of the invasive fern Pteridium Arachnoideum. This study recommends further investigation regarding the potential health impacts of Pteridium Arachnoideum, water quality in the basin of the burn, an in depth soil analysis, and a long term regeneration study.

Disciplines

Agricultural Science | Agriculture | Biodiversity | Environmental Health | Latin American Studies | Other Pharmacology, Toxicology and Environmental Health | Other Plant Sciences | Pharmacology, Toxicology and Environmental Health | Plant Biology | Plant Sciences

 

Share

Article Location

 
COinS