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