Stanford University

Security

FSI scholars produce research aimed at creating a safer world and examing the consequences of security policies on institutions and society. They look at longstanding issues including nuclear nonproliferation and the conflicts between countries like North and South Korea. But their research also examines new and emerging areas that transcend traditional borders – the drug war in Mexico and expanding terrorism networks. FSI researchers look at the changing methods of warfare with a focus on biosecurity and nuclear risk. They tackle cybersecurity with an eye toward privacy concerns and explore the implications of new actors like hackers.

Along with the changing face of conflict, terrorism and crime, FSI researchers study food security. They tackle the global problems of hunger, poverty and environmental degradation by generating knowledge and policy-relevant solutions. 

Conservation of Crop Genetic Resources in the Face of Climate Change

Conference report

Agriculture is the human enterprise most dependent on climate and natural resources, and is thus the sector that has the most to gain or lose from short- or long-run changes in the level or variability of climate. A growing literature seeks to understand the probable effects of climate change on agriculture, and improvements in our understanding of climate dynamics and crop response has begun to reduce some of the uncertainties inherent in projecting future impacts on agriculture. Nevertheless, there has been scant research conducted on the climate impacts on various crops and agroecosystems of central importance to the global poor. Furthermore, much of the existing literature assumes that farmers will automatically adapt to climate change and thereby lessen many of its potential negative impacts, taking for granted the monumental past efforts at the collection, preservation, and utilization of plant genetic resources on which much of farmer adaptation has historically depended.

Given potentially large changes in global temperature, regional precipitation patterns, and extreme weather events, we believe it is dangerous to assume that adaptation of cultivars will happen automatically. Extensive crop breeding that relies on access to genetic resources will almost certainly be required for crop adaptation under conditions of global climate change. Furthermore, substantial knowledge and insight is needed to gauge what types of diversity now exist in the gene banks, and what will be needed in the future. Fundamental questions remain to be addressed, for example: How are regional patterns of climate expected to change in the future, and how will these changes affect agro-ecosystems around the world? There are also several strategic investment issues to consider--which traits, which crops and which regions should be central to strategic decisions on ex situ genetic conservation? What steps should be taken to conserve the genetic diversity of the important but neglected minor crops where the number of accessions is currently low? Answers to these questions will be critical for promoting food security and ensuring human survival, and to date have received little or no attention in the scientific literature or broader policy arena.

This conference will seek to answer three main questions:

1) What and where are the largest threats to agro-ecosystems under future climate change? Here we will seek to identify both the nature and the location of the largest probable threats, a topic that to date has not been systematically undertaken for certain areas of interest.

2) Taken individually and together, what do these threats imply for crop genetic diversity on a regional or global level? I.e. which traits, which crops and which regions appear central to strategic decisions on ex situ genetic conservation?

3) What is the current state of genetic conservation with respect to these threats, and what does this imply about the sequencing of future efforts at ex situ conservation focus? For example, are there a set of minor crops important to food security that are both poorly represented in the gene banks and under great threat from future climate change?

Particular attention will be paid to those crops and cropping systems on which food insecure populations currently depend, and who would be least able to adapt in the absence of concerted public action to the contrary. We expect that this effort will be the first serious attempt to link crop genetic resource conservation to climate change and variability.

» A news article on recent investments being made by the Global Crop Diversity Trust, decisions which were informed by the Bellagio meeting.

Bellagio, Italy

Conferences
Climate and Agriculture: Models, Impacts, and Adaptation Strategies

Climate change a threat to Indonesian agriculture, PNAS study says

Authors
Marshall Burke
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News
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A new study published May 8th in the Proceedings of the National Academy of Sciences (PNAS) finds that Indonesian rice agriculture is greatly affected by short-run climate variability, and could be significantly harmed by long-run climate change. Indonesia is the fourth most populous country in the world, one of the world's largest producers and consumers of rice, and is characterized by a population of rural poor who depend on rice agriculture for their livelihood.

"Agriculture is central to human survival, and is probably the human enterprise most vulnerable to changes in climate", notes lead author Rosamond Naylor, Director of the Program on Food Security and the Environment at Stanford. "This is particularly true in countries such as Indonesia, with large populations of rural poor. Understanding the current and future effects of changes in climate on Indonesian rice agriculture will be crucial for improving the welfare of the country's poor".

Rice growers facing shortened rainy season

The PNAS study, entitled 'Assessing the risks of climate variability and climate change for Indonesian rice agriculture', was a joint effort among a team of scientists at Stanford University, the University of Washington, and the University of Wisconsin. The study finds that rice production in Indonesia is greatly affected by year-to-year climate variability -- in particular the variability caused by El Nino/Southern Oscillation (ENSO) events in the Pacific Ocean. During a warm ENSO event (or 'El Nino'), the arrival of the monsoon rains is delayed, disrupting the planting of the main rice crop and prolonging the 'hungry season' in Indonesia. "During a bad El Nino event, farmers literally wait months before they can plant their crop, resulting in a harvest that is months late and often much smaller in size", says Naylor.

The authors then analyzed how climate change could effect rainfall and agriculture in Indonesia. Using output from 20 global climate models (GCMs), running two emissions scenarios, and tailoring the GCM projections to the complex local topography of the Indonesian archipelago, the authors found that the probability of experiencing a harmful delay in monsoon rains could more than double in some of the most important rice growing regions in Indonesia.

"Most models predict that the rains will come later in Indonesia, it will rain a little harder once the monsoon begins, and then it will really dry up during the summer months," says David Battisti, co-author and atmospheric scientist at the University of Washington. "So Indonesia could be looking at a much shorter rainy season, with an almost rainless dry season in some areas, squeezing rice farmers on both ends".

While the study cannot directly address changes in the frequency or intensity of ENSO events under future climate change -- still an area of active research -- the authors conclude that even if there were no changes in the basic pattern of ENSO, Indonesian rice growers will be facing a significantly shortened rainy season. In the absence of adaptive measures, these growers could suffer greatly.

Adapting for change

What adaptive measures could be taken in the face of harmful short-run variability and long-run change in climate? In the short run, the science of ENSO prediction has advanced to the point that reasonably high-confidence ENSO forecasts are available at least two seasons in advance. A forecasting model developed by the authors is now being used to by the Indonesian Agricultural Ministry to anticipate and plan for ENSO events and their effects on agriculture. The authors are also working with Indonesian officials to develop longer-run strategies which address the anticipated effects of climate change on agriculture in the country. Such strategies could include investments in water storage, development of drought-tolerant crops, and crop diversification for those farmers at greatest risk.

Along with its important findings for Indonesian policy-makers, the study design itself is a novel contribution to the literature. "To our knowledge, our study is the first climate-agriculture study that uses projections from all available GCMs to look at climate effects in a specific region", explains Battisti. "Thus more than past efforts, our study captures the range of uncertainty across different projections of future climate, knowledge which will be crucial for long-run thinking about how to respond."

Battisti also notes that the use of empirical downscaling models in the study, which translate GCM output into useable regional forecasts of changes in climate, is a technique missing from most other studies of climate and agriculture in the tropics, an omission that could render their regional climate projections untrustworthy. Naylor adds: "From a scientific perspective, its imperative that we now replicate this kind of study elsewhere, in order to start building a more complete picture of the effects of climate change on agriculture." The team has begun a similar study in China this spring.

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Global Scale Climate-Crop Yield Relationships and the Impacts of Recent Warming

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Changes in the global production of major crops are important drivers of food prices, food security and land use decisions. Average global yields for these commodities are determined by the performance of crops in millions of fields distributed across a range of management, soil and climate regimes. Despite the complexity of global food supply, here we show that simple measures of growing season temperatures and precipitation--spatial averages based on the locations of each crop--explain about 30% or more of year-to-year variations in global average yields for the world's six most widely grown crops. For wheat, maize, and barley, there is a clearly negative response of global yields to increased temperatures. Based on these sensitivities and observed climate trends, we estimate that warming since 1981 has resulted in annual combined losses of these three crops representing roughly 40 MT or $5 billion per year, as of 2002. While these impacts are small relative to the technological yield gains over the same period, the results demonstrate already occurring negative impacts of climate trends on crop yields at the global scale.

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Journal Articles
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Environmental Research Letters
Authors
David Lobell
Christopher B. Field
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Project Timeline: Program for the Study of Biofuels, Poverty and Food Security

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A concept note about setting up an international program for studying the effects of the emergence of biofuels on global poverty and food security. 

The recent global expansion of biofuels production is an intense topic of discussion in both the popular and academic press. Much of the debate surrounding biofuels has focused on narrow issues of energy efficiency and fossil fuel substitution, to the exclusion of broader questions concerning the effects of large-scale biofuels development on commodity markets, land use patterns, and the global poor. There is reason to think these effects will be very large. The majority of poor people living in chronic hunger are net consumers of staple food crops; poor households spend a large share of their budget on starchy staples; and as a result, price hikes for staple agricultural commodities have the largest impact on poor consumers. For example, the rapidly growing use of corn for ethanol in the U.S. has recently sent corn prices soaring, boosting farmer incomes domestically but causing riots in the streets of Mexico City over tortilla prices. Preliminary analysis suggests that such price movements, which directly threaten hundreds of millions of households around the world, could be more than a passing phenomenon. Rapid biofuels development is occurring throughout the developed and developing world, transforming commodity markets and increasingly linking food prices to a volatile energy sector. Yet there remains little understanding of how these changes will affect global poverty and food security, and an apprehension on the part of many governments as to whether and how to participate in the biofuels revolution.

We propose an international collaborative effort to:

  • Understand and quantify the effects of expanding biofuels production on agricultural commodity markets, food security, and poverty;
  • Develop training programs and policy tools to harness the benefits and mitigate the damages from such expansion on both local and global scales; and
  • Build an international network of scholars and government officials devoted to studying and managing biofuels development and its social consequences
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Scott Rozelle
Rosamond L. Naylor
Walter P. Falcon
Kenneth Cassman

Feeding the World in the 21st Century: Exploring the Connections between Food Production, Health, Environmental Resources, and International Security

This project involves political scientists, economists, and medical researchers to address the question of whether hunger, poverty, disease and agricultural resource constraints foster civil conflict and international terrorism. Economists have elucidated the links between agricultural stagnation, poverty, and food insecurity, and political scientists have empirically analyzed the role of poverty in facilitating civil conflict.

Biofuels, Climate, and Global Food Markets

Biofuels are a hot topic in both the academic literature and the popular press. Much of the current debate over biofuels, however, is devoted to narrow issues of energy conversion to the exclusion of understanding the broader implications surrounding their rapid development. This project embraces these larger questions, examining the role of biofuels development on global land use change and climate, on food markets, and on global food security. Primary questions include:

Orphan crops

Orphan (or minor) crops are those crops which are typically not traded internationally but which can play an important role in regional food security. For various reasons, many of these crops have received little attention from crop breeders or other research institutions wishing to improve their productivity. This project produced an earlier paper on the role of orphan crops in regional food security, with implications for national and international breeding efforts.

Fertilizer Use and the Epidemiology and Evolution of Cholera in Bangladesh

The use of chemical fertilizers in developing countries made possible the Green Revolution, and as a result many regions once visited by periodic famines are now food self-sufficient. However, there is a growing recognition that the injudicious use of chemical fertilizers may have adverse environmental consequences including toxic algal blooms and damage to productive ocean fisheries.

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