- Ulf Büntgen is geographer and dendrochronologist.
- Vicente Rozas is dendroecologist.
- Antonio Gazol is a postdoctoral researcher working on plant community patterns at the IPE (CSIC).
- Juan Carlos Linares is an associate professor of ecology at Universidad Pablo de Olavide, Seville, Spain.
- Emilia Gutiérrez is a professor of ecology at Universitat de Barcelona, Barcelona, Spain.
- Thorsten Wiegand is a Senior Scientist and serves a ecologist at the Helmholtz Centre for Environmental Research, Leipzig, Germany.
- Enric Batllori and Isabel Martínez Cano are two post-doctoral researchers with who I enjoyed a lot working on treeline dynamics.
- Pieter Zuidema is an associate professor on Forest Ecology at Wageningen University, The Netherlands.
- Jacques Tardif is professor of ecology at University of Winnipeg, Canada.
- José Miguel (Txemi) Olano is a professor of botany and ecology at University of Valladolid, Soria, Spain.
- Bosco Imbert is an associate professor of forest ecology at Universidad Pública de Navarra, Pamplona, Spain.
- Lluís Coll is a forest ecologist working at the Centre Tecnològic Forestal de Catalunya, Solsona, Spain.
- Josep Maria Espelta is a researcher at Centre de Recerca Ecològica i Aplicacions Forestals, Barcelona, Spain.
- Sergio M. Vicente-Serrano is a geographer (climatologist) in the Instituto Pirenaico de Ecología (CSIC), Zaragoza, Spain.
- Eustaquio Gil-Pelegrín is a forest ecologist and ecophysiologist at CITA-Aragón, Zaragoza, Spain.
- Alex Fajardo is a forest ecologist at Research Center of Patagonian Ecosystems, Coyhaique, Chile.
- Carlos Iván Espinosa is associate professor at Universidad Particular Técnica de Loja, Loja, Ecuador.