Propuesta de monitoreo de variables comunitarias al evento El Niño (1998-2001, 2010) en las Lomas de Lachay, Perú
Authors
Castañeda Córdova, Liz Zaida
Abstract
Este estudio tiene el objetivo de evaluar las variables comunitarias de 3 taxa (herbáceas, avifauna y coleópteros) bajo el efecto del Evento El Niño, en la Reserva Nacional de Lachay, entre el periodo de 1998-2001 y 2010. Se emplearon los datos registrados en campo entre 1998-2001, y 2010 en 31 parcelas con 3 niveles de perturbación antrópica (12B, 8M, 11A), 15 muestreos para plantas y aves, y 19 muestreos para coleópteros porque se incorporan datos del 2002. Se estimó la composición, la abundancia, la riqueza, la equidad, la diversidad y los grupos funcionales y solo para las herbáceas la densidad, la cobertura, el IVI, las diversidades alfa densidad y alfa IVI, las diversidades gamma densidad y gamma IVIg y el Cinv. Se registró 9 nuevas especies de herbáceas y 7 morfoespecies de coleópteros en el 2010. La mayoría de las variables evaluadas presentaron una alta variabilidad al parecer por la alta variabilidad de algunos factores abióticos como la precipitación influenciadas por el ENSO y el Anticiclon del Pacifico Sur, para monitorear se proponen las variables Cinv Abundancia, Cinv Cobertura, Cinv IVI considerando si son nativas y/o endémicas, se aprecia su incremento luego de un ENSO sugiriendo que los ENSOs son activadores de la memoria histórica de los ecosistemas de Lomas. Además la abundancia y la riqueza de los coleópteros, la diversidad alfa y la riqueza de las aves. De los grupos funcionales el porcentaje de abundancia de caméfitas y de nanofanerófitas, la abundancia de los grupos depredador y saprófago. Algunas especies clave propuestas son Solanum montanum, Stenomesson coccineum, Croton ruizianus, Trixis cacalioides, Crassula connata, Urocarpidium peruvianum y Nicotiana paniculata, esta ultima cumpliendo la función de captura de agua atmosférica y como variable clave el IVIg, algunas variables están más relacionadas a detectar las condiciones de sequía.
This study aims to evaluate the community variables of 3 taxa (herbaceous, birds and beetles) under the effect of the El Niño event, in Lachay National Reserve, between the period of 1998-2001 and 2010. Data recorded in the field were used between 1998-2001 and 2010 in 31 plots with levels of anthropogenic disturbance (12B, 8M, 11A), 15 samplings for birds, plants, and 19 samplings for beetles because the 2002 data are incorporated. It was estimated the composition, abundance, richness, equity, diversity and functional groups and only herbaceous coverage, density, IVI, density alpha diversity and alpha IVI, density gamma diversity and gamma IVIg and Cinv. Nine new herbaceous species and 7 morphospecies beetles were recorded in 2010. Most of the variables evaluated showed a high variability apparently by the high variability of abiotic factors such as precipitation influenced by ENSO and the anticyclone of the South Pacific, to monitor proposed variables Cinv Abundance, Cinv Coverage, Cinv IVI considering whether they are native or endemic, it is rise after an ENSO can be seen suggesting that the ENSOs are activators of the historical memory of the Lomas ecosystems. Also the abundance and richness of beetles, alpha diversity and the richness of birds. Functional groups the percentage of abundance of chamaephytes, nanophanerophytes, the abundance of predatory and saprofago groups. Some proposed key species are Solanum montanum, Stenomesson coccineum, Croton ruizianus, Trixis cacalioides, Crassula connata, Urocarpidium peruvianum and Nicotiana paniculata, the latter play the role of atmospheric water capture and as a key variable IVIg, some variables are more related to detect drought conditions.
This study aims to evaluate the community variables of 3 taxa (herbaceous, birds and beetles) under the effect of the El Niño event, in Lachay National Reserve, between the period of 1998-2001 and 2010. Data recorded in the field were used between 1998-2001 and 2010 in 31 plots with levels of anthropogenic disturbance (12B, 8M, 11A), 15 samplings for birds, plants, and 19 samplings for beetles because the 2002 data are incorporated. It was estimated the composition, abundance, richness, equity, diversity and functional groups and only herbaceous coverage, density, IVI, density alpha diversity and alpha IVI, density gamma diversity and gamma IVIg and Cinv. Nine new herbaceous species and 7 morphospecies beetles were recorded in 2010. Most of the variables evaluated showed a high variability apparently by the high variability of abiotic factors such as precipitation influenced by ENSO and the anticyclone of the South Pacific, to monitor proposed variables Cinv Abundance, Cinv Coverage, Cinv IVI considering whether they are native or endemic, it is rise after an ENSO can be seen suggesting that the ENSOs are activators of the historical memory of the Lomas ecosystems. Also the abundance and richness of beetles, alpha diversity and the richness of birds. Functional groups the percentage of abundance of chamaephytes, nanophanerophytes, the abundance of predatory and saprofago groups. Some proposed key species are Solanum montanum, Stenomesson coccineum, Croton ruizianus, Trixis cacalioides, Crassula connata, Urocarpidium peruvianum and Nicotiana paniculata, the latter play the role of atmospheric water capture and as a key variable IVIg, some variables are more related to detect drought conditions.
Description
Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Ecología Aplicada
Keywords
Plantas herbáceas; Aves; Coleóptera; Biocenosis; Ecosistema; Habitat; Reservas naturales; Zonas protegidas; Fenómenos atmosféricos; Cambio climático; Variación estacional; Identificación; Factores ecológicos; Perú; Variables comunitarias; Resiliencia; Evento El Niño; Reserva Nacional de Lachay
Citation
Date
2018
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