Andrés F. Ramírez-MejíaNational University of Tucuman | UNT · Instituto de Ecología Regional (IER) - CONICET
Andrés F. Ramírez-Mejía
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I'm mainly involved in the study of pollination biology and mammals ecology. Currently, my research is focused on exploring the contribution and effectiveness of wild bees and hummingbirds as pollinators of blueberries crops in Argentina. I'm particularly interested in understanding their implications on fruit quality and crop yield, and factors moderating pollination service at farm and landscape scale.
The Chinchiná River basin is located on the western slope of the Colombian Central Andes. This basin provides ecosystem services such as water provision for >500,000 people, but has suffered considerable ecosystem degradation, and the information on its biodiversity is limited. We inventoried the non-volant mammals in the Caldas' Central Hydroelect...
To mitigate deforestation effects, reforestation programs with native and/or exotic species have been implemented in the Colombian Andes, but little is known about howsuch reforestations affect wildlife. Using camera-traps, we studied the species richness, activity patterns, and habitat use of middle and large mammals in two adjacent forests, a nat...
Urbanization is one of the most pervasive processes of landscape transformation, responsible for novel selection agents promoting functional community homogenization. Bats may persist in those environments, but the mechanisms responsible for their adaptability and the spatial scales in which the landscape imposes environmental filtering remain poor...
Eucalypt plantations alter the physical and chemical conditions of the environment, and the value of such plantations for biodiversity conservation is controversial. Research on their potential effects on native Neotropical bird communities has focused on taxonomic diversity, while its impacts on other ecological aspects remain only partially explo...
According to diet‐regulation hypotheses, animals select food to regulate the intake of macronutrients or maximise energy feeding efficiency. Specifically, the nutrient balance model proposes that foraging is primarily a process of balancing multiple nutrients to achieve a nutritional intake target, while the energy maximisation model proposes that...
Land use intensification imposes selective pressures that systematically change the frequency of wild population phenotypes. Growing evidence is biased towards the comparison of populations from discrete categories of land uses, ignoring the role of landscape emerging properties on the phenotype selection of wild fauna. Across the largest urban-rur...
This preprint has been published in the Journal of Tropical Ecology following the peer-review process: Ramírez-Mejía, A.F., Urbina-Cardona, J.N., Sánchez, F. 2021. The interplay of spatial scale and landscape transformation moderates the abundance and intraspecific variation in the ecomorphological traits of a phyllostomid bat. Journal of Tropical...
I'm looking for sources of pollinator functional traits. I´m particularly interested in data about mouthpart length and body mass.
I've already consulted works such as Borges et al. (2020), Woodcock et al. (2019), and Normandin et al. (2017).
I would appreciate any recommendation.
Thanks in advance!
I'm working in the spatial analysis of a fragmented forest in a human dominated landscape and I'm looking for a tool to calculate the minimum distance between polygons of the same shapefile in ArcGis.
I have tried already with the "Generate Table Near" tool, but it requires that the polygons are separated in different shapefiles.
thanks to all