Untitled

Hopfenberg, Russell; Pimentel, David

doi:10.1023/a:1011463231976

Cited by 55 publications

(16 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, as a countermeasure for food security, the yield growth rate should be maintained at a level higher than that of population growth. Hopfenberg and Pimentel (2001) argued with their analysis that crop yield needs to grow 1-2 % faster than population growth rate in order to secure food supply. Alternatively, population control should be prioritized where proper yield growth rate cannot be sustained (Ehrlich and Ehrlich 2009).…”

Section: Food Production Capacitiesmentioning

confidence: 99%

Climate change impact on China food security in 2050

Xiong

et al. 2012

Agron. Sustain. Dev.

114

View full text Add to dashboard Cite

Climate change is now affecting global agriculture and food production worldwide. Nonetheless the direct link between climate change and food security at the national scale is poorly understood. Here we simulated the effect of climate change on food security in China using the CERES crop models and the IPCC SRES A2 and B2 scenarios including CO2 fertilization effect. Models took into account population size, urbanization rate, cropland area, cropping intensity and technology development. Our results predict that food crop yield will increase +3-11 % under A2 scenario and +4 % under B2 scenario during 2030-2050, despite disparities among individual crops. As a consequence China will be able to achieve a production of 572 and 615 MT in 2030, then 635 and 646 MT in 2050 under A2 and B2 scenarios, respectively. In 2030 the food security index (FSI) will drop from +24 % in 2009 to −4.5 % and +10.2 % under A2 and B2 scenarios, respectively. In 2050, however, the FSI is predicted to increase to +7.1 % and +20.0 % under A2 and B2 scenarios, respectively, but this increase will be achieved only with the projected decrease of Chinese population. We conclude that 1) the proposed food security index is a simple yet powerful tool for food security analysis; (2) yield growth rate is a much better indicator of food security than yield per se; and (3) climate change only has a moderate positive effect on food security as compared to other factors such as cropland area, population growth, socio-economic pathway and technology development. Relevant policy options and research topics are suggested accordingly.

show abstract

Section: Food Production Capacitiesmentioning

confidence: 99%

Climate change impact on China food security in 2050

Xiong

et al. 2012

Agron. Sustain. Dev.

114

View full text Add to dashboard Cite

show abstract

“…The result of this population decline is that the resources are replenished. This replenishment then begins the negative feedback cycle again (Hopfenberg and Pimentel 2001).…”

Section: Negative Feedback In Population Regulationmentioning

confidence: 98%

“…The increase in the number of humans is responsible for amounts of pollutants dumped into land, water, and atmosphere. It is well understood that escalating human population is fueling the acceleration of all environmental problems (Pimentel et al 1998;Hopfenberg and Pimentel 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Although human numbers have more than doubled since 1960, much of the scientific and lay literature holds to the perspective that food production must be increased to feed a growing population (Hopfenberg and Pimentel 2001). For example, Young (1999) noted that current UN projections predict that the population of developing countries will rise to about eight billion by 2025 and nine billion by 2050.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, it has been clarified that human population growth is a function of food supply (Farb 1978;Quinn 1992Quinn , 1996Hopfenberg and Pimentel 2001;Hopfenberg 2003). McQueen (2000) showed that while world food production currently exceeds requirements, distribution problems leave about 800 million people malnourished.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Genetic Feedback and Human Population Regulation

Hopfenberg

2009

Hum Ecol

Self Cite

View full text Add to dashboard Cite

Human population growth has been identified as a primary cause of ecologically destructive phenomena and, if left unchecked, will threaten the survivability of the human species. It has been demonstrated that genetic feedback is the mechanism by which species achieve ecological balance. The present analysis shows the applicability of this mechanism to human population regulation. In this model, the traits of behavior and culture are explained as following a four step process, similar to, and nested within genetic evolution. As species extinction is part and parcel of evolution, and environmental circumstances are changing rapidly, the population regulatory change that would take place on the genetic level of integration would be human extinction. However, the change on the cultural level, requiring a revision of the social contingency from "food production must be increased to feed a growing population" to "food production increases cause population increases," would lead to human sustainability.

show abstract

Remembering Malthus III: Implementing a global population reduction

Smail¹

2003

American J Phys Anthropol

View full text Add to dashboard Cite

Untitled

Cited by 55 publications

References 45 publications

Climate change impact on China food security in 2050

Climate change impact on China food security in 2050

Genetic Feedback and Human Population Regulation

Remembering Malthus III: Implementing a global population reduction

Contact Info

Product

Resources

About