1 Jorge A. Huete-Perez is vice-president of the Academy of Sciences of Nicaragua and a professor at the University of Central America, Managua, Nicaragua. jorgehuete@uca-cbm.org.
2 Axel Meyer is a profesor in the Department of Biology at the University of Konstanz, Konstanz, Germany. Axel.Meyer@uni-konstanz.de.
3 Pedro J. Alvarez is the George R. Brown Professor and Chair of Civil and Environmental Engineering at Rice University, Houston, Texas, USA. alvarez@rice.edu.