Post on 23-Sep-2020
Universidad del Rosario
Facultad de Ciencias Naturales y Matematicas
Historia Natural de Plantas Tropicales
A describir la diversidad de plantas
Determinar por qué unas regiones son mas diversas
Reconstrucciones históricas en cada uno de los biomas del mundo
¿Cómo han grupos de especies adaptadas a los cambios históricos en la geología y el clima?
¿Cómo pueden adaptarse a los cambios futuros?
Conservación
Phylogenetic Niche Conservatism
la tendencia de las especies a retener rasgos ancestrales
Coffee Evolution
Coffea phylogenetics
Coffea evolution and historical biogeography
125 species
Current climatic envelopes
Responses to historical climatic changes
Responses to future climatic changes
Aaron Davis - Senior Research Leader, Plant Resources
Justin Moat - Research Leader, Spatial Analysis
From c. 40 Myr - global
cooling at least in part
resulting from the
development of
permanent continental
ice-sheets in Antarctica
induced a drier climate
Node a) mean: 32.9 Myr
18-17 Myr - Closure of the
Tethys sea terminated the
moist influence of the
latitudinal oceanic
circulation system.
This event post-dates an
Early Miocene warmer and
moister climate during
which rain forest is thought
to have extended again
from coast to coast.
Spread of savannas at the
expense of rain forests
evident from
paleobotanical studies that
indicate an increase in
grass abundance at this
time.
Node b) mean: 16.8 Myr
c. 10 Myr - Initiation of
geological activity in the
western East African Rift
System that uplifted the
central Tanganyikan plateau
Played a significant role in
the aridification of eastern
Africa
Significant extension of
savannas in East Africa as
evident from an increase in
biomass C4 plants (8–6 Myr).
Nodes c, d and e) mean
range: 8.4–5.4 Myr
East African/Indian Ocean
Mostly West and Central Africa
Muchas especies de café ha evolucionado
por cambios climático en el parte oriental de
África
Baja capacidad a adaptar a cambios
climáticos
A1B maximum energy requirements; emissions differentiated dependent on fuel sources; balance across sources
A2A high energy requirements; emissions less than A1/F1
B2A lower energy requriements; emissions greater than B1
Thresholds
Las poblaciones nativas tienen más
probabilidades de ser más resistentes al
cambio climático, debido que tienen más
diversidad genética que las cultivadas
Conservacion de las poblaciones nativas de
chocolate y café y los bosques en donde viven