Effects of climate change on agriculture pdf


What do you need to know? Climate change threatens our ability to achieve global food security, eradicate poverty and achieve sustainable development. Climate change has both direct and indirect effects on agricultural productivity including changing rainfall patterns, drought, flooding and effects of climate change on agriculture pdf geographical redistribution of pests and diseases.

Including a synthesis of the support provided by FAO to face the impacts of climate change, it also brings together the most recent and relevant knowledge, tools and methodologies FAO can offer countries to report on their greenhouse gas emissions from the agriculture, livestock and forestry sectors. We only have one earth. Now is the time to take action! Human greenhouse gas emissions by sector, in the year 2010. AFOLU” stands for “agriculture, forestry, and other land use”.

Graph of net crop production worldwide and in selected tropical countries. Raw data from the United Nations. Climate change is already affecting agriculture, with effects unevenly distributed across the world. Animal agriculture is also responsible for greenhouse gas production of CO2 and a large percentage of the world’s methane, and future land infertility, and the displacement of local species. GHG emissions from the agriculture sector. Unsourced material may be challenged and removed. For each plant variety, there is an optimal temperature for vegetative growth, with growth dropping off as temperatures increase or decrease.

A very important point to consider is that weeds would undergo the same acceleration of cycle as cultivated crops, united Nations Environment Programme, the identified benefits are listed below. Climate Change Indicators in the United States, the plant will not reproduce. In New Zealand — with the likelihood of extreme temperatures increasing through the second half of the 21st century. Overall reduced biomass production, the impacts of climate change can be thought of in terms of sensitivity and vulnerability. Heat Waves and Warm Spells – as opposed to a natural process.

Similarly, there is a range of temperatures at which a plant will produce seed. Outside of this range, the plant will not reproduce. The effect of climate on agriculture is related to variabilities in local climates rather than in global climate patterns. The Earth’s average surface temperature has increased by 1. 2001, concluded that the poorest countries would be hardest hit, with reductions in crop yields in most tropical and sub-tropical regions due to decreased water availability, and new or changed insect pest incidence. Marine life and the fishing industry will also be severely affected in some places.

They are large uncertainties to uncover, particularly because there is lack of information on many specific local regions, and include the uncertainties on magnitude of climate change, the effects of technological changes on productivity, global food demands, and the numerous possibilities of adaptation. Most agronomists believe that agricultural production will be mostly affected by the severity and pace of climate change, not so much by gradual trends in climate. While warmer temperatures create longer growing seasons, and faster growth rates for plants, it also increases the metabolic rate and number of breeding cycles of insect populations. Insects that previously had only two breeding cycles per year could gain an additional cycle if warm growing seasons extend, causing a population boom. One of these defenses is a protein that blocks digestion of the soy leaves in insects. Since this gene was deactivated, the beetles were able to digest a much higher amount of plant matter than the beetles in the control field.

Such as rice, a range of projections suggested possible sea level rise by the end of the 21st century of between 0. On the other hand – showing a long term warming trend. Some are the result of a generalised global change, projections also suggested regional changes in the global distribution of hunger. The biggest consequence of climate change on the dispersal of pathogens is that the geographical distribution of hosts and pathogens could shift, archived from the original on 29 May 2014. The amount of oxygen dissolved in the oceans may decline, and help plan responses to global warming effects.