31 de julio 2018 • 12:00 h. • Auditorio I, Campus III, INECOL

 

Frederico de Siqueira Neves

Laboratório de Ecologia de Insetos

Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais 

 

Science is demanding a better understanding of how global climate change will affect biodiversity. In this context, campo rupestre is an excellent ecological model, a megadiverrsity system that present a great spatial extent (~1,200 km), with latitudinal and elevational variation. Campo rupestre is a environment very old (~ 65 million of year) being considered an old, climate-buffered and infertile landscape (OCIBIL). Although the altitudinal range in some tropical mountain systems is small, these mountains present high diversity and are found in a mosaic of habitats. The mechanisms that determine this distribution of species are generally associated with changes in conditions such as climate and soil, insofar as when the altitude on the mountain increases. However, there is only limited knowledge of trends in species distribution over spatial and temporal scales for tropical mountains insect communities, and partitioning of diversity is a useful way to deal with the aforementioned mechanisms. We identified the principal scales that maintain the diversity of insects and evaluated the distribution patterns of insects diversity and the mechanisms behind them at different scales (temporal and spatial) in tropical megadiverse mountains. Insects were studied throughout the habitats and altitudes in Serra do Cipó (800 to 1400m a.s.l.), Brazil. Data on climatic conditions (temperature and humidity) and plant richness were recorded. We confirming the high diversity and endemism found for other taxa in the same mountain range. Spatial β-diversity is the main mechanism that drives insect diversity in this system, among elevations and habitats, and species turnover is the main drives that influences the β-diversity in space, for different taxa or species classification by habitat use. Also demonstrated that habitat generalist species that determine the nestedness in this metacommunity in highland regions. We present the campo rupestre as a model for ecological and evolutionary studies in neotropical systems and the importance elevations and heterogeneous natural mosaics of habitats for the maintenance of the high diversity of insects in tropical mountains. In addition, we show that turnover is the main mechanism that determines beta spatial diversity and that generalist species as drives the nestedness in this metacommunity. Finally, I invite colleagues to increase the collaboration between my university (UFMG) and INECOL, using the campo rupestre as a model for comparisons between ecological and evolutionary studies.