ScienceDaily (Oct. 30, 2012) — Feeding the
world releases up to 17,000 megatonnes of carbon dioxide into the
atmosphere annually, according to a new analysis released October 30 by
the CGIAR Research Program on Climate Change, Agriculture and Food
Security (CCAFS). But while the emissions "footprint" of food production
needs to be reduced, a companion policy brief by CCAFS lays out how
climate change will require a complete recalibration of where specific
crops are grown and livestock are raised.
¿ A qué concepto de los estudiados corresponde "emissions "footprint" of food" and "releases up to 17,000 megatonnes of carbon dioxide into the atmosphere annually"?
R: Indicador de presión del Cambio Climático.
This figure accounts for every aspect of food production and distribution -- including growing crops and raising livestock, manufacturing fertilizer, and storing, transporting and refrigerating food. Agriculture accounts for around 80 percent of these emissions, but the combined contribution of transport, refrigeration, consumer practices and waste management is growing.
¿Con qué término definimos aspectos de la producción de comida como los mencionados en este párrafo?
R: costes ocultos
All regions will have to change their current approach to what they grow and eat.
Yields of the three biggest crops in terms of calories provided -- maize/maiz, rice/arroz and wheat/trigo -- will decrease in many developing countries as temperatures rise and rainfall becomes more unpredictable.
By 2050, climate change could cause irrigated wheat yields in developing countries to fall by 13 percent. Irrigated rice in these same countries could tumble 15 percent. In Africa, many farmers of maize, which is not that well suited to increased temperatures, could lose 10 to 20 percent of their yields.
¿Por qué el maiz "is not that well suited to increased temperatures"?
R: podría parecer planta C3, temperatura es un factor limitante porque cierra estomas y le falta CO2 para fotosíntesis. Disminuye producción primaria.Pero es C4
The cost of feeding livestock with maize and grain will become more expensive. And the availability of fish -- which are particularly susceptible to higher temperatures and higher ocean salinity -- will become increasingly constrained.
¿Por qué la pesca es susceptible al aumento de la temperatura? Haz un diagrama causal.
R: mayor temperatura, menor disolución de O2 y CO2, menos producción de fitoplancton y menos O2 para respiración de peces, más migración
Vegetable sources of protein will not fare much better. Soybeans have great difficulty withstanding higher temperatures. Even heartier crops, such as millet, lentils and cowpea -- "the poor man's meat" -- can wither under too much heat stress.
¿Qué ventajas tiene obtener las proteínas de "the poor man's meat"?
R: más eficiente, 10%
http://www.sciencedaily.com/releases/2012/10/121030210343.htm
¿ A qué concepto de los estudiados corresponde "emissions "footprint" of food" and "releases up to 17,000 megatonnes of carbon dioxide into the atmosphere annually"?
R: Indicador de presión del Cambio Climático.
This figure accounts for every aspect of food production and distribution -- including growing crops and raising livestock, manufacturing fertilizer, and storing, transporting and refrigerating food. Agriculture accounts for around 80 percent of these emissions, but the combined contribution of transport, refrigeration, consumer practices and waste management is growing.
¿Con qué término definimos aspectos de la producción de comida como los mencionados en este párrafo?
R: costes ocultos
All regions will have to change their current approach to what they grow and eat.
Yields of the three biggest crops in terms of calories provided -- maize/maiz, rice/arroz and wheat/trigo -- will decrease in many developing countries as temperatures rise and rainfall becomes more unpredictable.
By 2050, climate change could cause irrigated wheat yields in developing countries to fall by 13 percent. Irrigated rice in these same countries could tumble 15 percent. In Africa, many farmers of maize, which is not that well suited to increased temperatures, could lose 10 to 20 percent of their yields.
¿Por qué el maiz "is not that well suited to increased temperatures"?
R: podría parecer planta C3, temperatura es un factor limitante porque cierra estomas y le falta CO2 para fotosíntesis. Disminuye producción primaria.Pero es C4
The cost of feeding livestock with maize and grain will become more expensive. And the availability of fish -- which are particularly susceptible to higher temperatures and higher ocean salinity -- will become increasingly constrained.
¿Por qué la pesca es susceptible al aumento de la temperatura? Haz un diagrama causal.
R: mayor temperatura, menor disolución de O2 y CO2, menos producción de fitoplancton y menos O2 para respiración de peces, más migración
Vegetable sources of protein will not fare much better. Soybeans have great difficulty withstanding higher temperatures. Even heartier crops, such as millet, lentils and cowpea -- "the poor man's meat" -- can wither under too much heat stress.
¿Qué ventajas tiene obtener las proteínas de "the poor man's meat"?
R: más eficiente, 10%
http://www.sciencedaily.com/releases/2012/10/121030210343.htm
