Other | GOnormandie

Of Toads and May beetles

Mon, 27 Nov 2023 00:00:00 +0000

Scientists in Puerto Rico introduced the cane toad (Rhinella marina) as a biocontrol of Phyllophaga sp. (may beetle) infestation in sugar cane plantations in the early 1900s. Although the may beetle problem receded, scientist question whether this was thanks to the toad. In 1984, Freeland, W. J., stated that the decline of the beetle population in Puerto Rico was due to extreme wet and dry seasons between 1930-1936, and not the because of the introduction of the toad. Given the lack of data, we cannot evaluate if the introduction of R. marina was effective against the population of may beetles in Puerto Rico. Nonetheless, historical data of precipitation in Puerto Rico can be used to evaluate if during these years Puerto Rico had extreme wet and dry seasons.

NOTE: This is not meant to be a scientific report, but rather a friendly account of my research project. For more technical details or the scientific report, reach out to me and I will gladly provide the information.

Speciation and Pollination of Ghost Orchids in La Hispaniola

Mon, 27 Nov 2023 00:00:00 +0000

Morphological differences in flowers of Dendrophylax sp. in the Dominican Republic suggest speciation and exploitation of different pollinators. In collaboration with the National Botanical Garden Dr. Rafael María Moscoso in the Dominican Republic, and peers from the University of Illinois, we are conducting research to elucidate the taxonomy of Dendrophylax in La Hispaniola.

Morphological data of the flowers in different populations are being measured to proof that the differences that were previously observed are statistically significant. Since flower morphology is related to pollinators, we hypothesize that floral fragrance composition will also differ among populations, because different pollinators are being targeted. Therefore, we are conducting floral fragrance analysis from the different populations using GC-MS analysis. The pollinators of Dendrophylax in La Hispaniola are unknown. Nonetheless, given morphology and fragrance of the flower, we hypothesized that the pollinator is a hawkmoth. This is supported also by the fact that D. lindenii in Florida, USA is pollinated by hawkmoths. We are using light traps to try and catch a possible pollinator. To go even further on the determination of differentiation and speciation, we are collecting tissue form different species and populations to run DNA analysis and develop the phylogeny for Dendrophylax in La Hispaniola.

Geospatial Explorers

Mon, 01 Jan 0001 00:00:00 +0000

LUQ-LTER Data Jam

Mon, 01 Jan 0001 00:00:00 +0000