Featured
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| Open AccessGlobal phosphorus shortage will be aggravated by soil erosion
Phosphorus is an essential nutrient critical for agriculture, but because it is non-renewable its future availability is threatened. Here the authors show that across the globe most nations have net losses of phosphorus, with soil erosion as the major route of loss in Europe, Africa and South America.
- Christine Alewell
- , Bruno Ringeval
- & Pasquale Borrelli
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Article
| Open AccessYield reduction under climate warming varies among wheat cultivars in South Africa
Wheat yield is sensitive to temperature, but there could be substantial variation in this response across cultivars. Here the authors present data on the climatic responses of wheat cultivars in South Africa, highlighting which cultivars might be better able to maintain yield under warming.
- Aaron M. Shew
- , Jesse B. Tack
- & Petronella Chaminuka
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| Open AccessSocietal benefits of halving agricultural ammonia emissions in China far exceed the abatement costs
Global largest agricultural ammonia (NH3) emissions in China have caused severe damage to both ecosystem and human health, yet no policy is formulated to reduce NH3 emissions. Here, the authors show that halving agricultural NH3 emissions with feasible technical mitigation options in China generates far more societal benefits than abatement costs.
- Xiuming Zhang
- , Baojing Gu
- & Deli Chen
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| Open AccessWater rights shape crop yield and revenue volatility tradeoffs for adaptation in snow dependent systems
Studies on examining the climate impact on irrigated agriculture do not account for regional specific details. Here the authors studied both the direct and indirect impact of climate change on irrigated agriculture in the Yakima River Basin (YRB) and found that increasingly severe droughts and temperature driven reductions in growing season significantly reduces expected annual agricultural productivity.
- Keyvan Malek
- , Patrick Reed
- & Michael Brady
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| Open AccessGenetic breakdown of a Tet-off conditional lethality system for insect population control
Insect population control using conditional lethal systems could break down due to spontaneous mutations that render the system ineffective. Here the authors analyse the structure and frequency of such mutations in Drosophila and suggest the use of dual lethality systems to mitigate their survival.
- Yang Zhao
- , Marc F. Schetelig
- & Alfred M. Handler
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| Open AccessClimate adaptation by crop migration
Extreme high temperature events are increasing in frequency and severity, threatening the capacity for crops and farmers alike to adapt. Here Sloat and colleagues track the movement of cereal crops over the past 40 years, finding a global migration away from warming climates.
- Lindsey L. Sloat
- , Steven J. Davis
- & Nathaniel D. Mueller
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| Open AccessFingerprint of rice paddies in spatial–temporal dynamics of atmospheric methane concentration in monsoon Asia
The role of paddy rice agriculture in the spatial and temporal dynamics of atmospheric methane concentration remains unclear. Here, Zhang et al. show that regions with dense rice paddies have high satellite-based column averaged CH4 concentrations (XCH4), and that seasonal dynamics of XCH4 mirror those of paddy rice growth.
- Geli Zhang
- , Xiangming Xiao
- & Berrien Moore III
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Article
| Open AccessGreenhouse gas emissions resulting from conversion of peat swamp forest to oil palm plantation
The magnitude of greenhouse gas emissions from land use change on tropical peatlands is unclear. Here, the authors measure greenhouse gas fluxes throughout the conversion from peat swamp forest to oil palm plantation, and estimate the contribution to regional and global emissions.
- Hannah V. Cooper
- , Stephanie Evers
- & Sofie Sjogersten
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Article
| Open AccessCharacterization of antibiotic resistance genes in the species of the rumen microbiota
Here, the authors combine in silico analysis of 435 genomes of ruminal bacteria and archaea with transcriptomics and in vitro assays to investigate the distribution, expression and mobility of antibiotic resistance genes within the ruminal microbiota, finding that the tet(W) gene is under positive selective pressure.
- Yasmin Neves Vieira Sabino
- , Mateus Ferreira Santana
- & Hilário Cuquetto Mantovani
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| Open AccessThe greenhouse gas impacts of converting food production in England and Wales to organic methods
The greenhouse gas (GHG) mitigation potential of organic methods is poorly understood. Here, the authors assess the GHG impact of a 100% shift to organic food production in England and Wales and find that direct GHG emissions are reduced with organic farming, but when increased land use abroad to allow for production shortfalls is factored in, GHG emissions are elevated well-above the baseline.
- Laurence G. Smith
- , Guy J. D. Kirk
- & Adrian G. Williams
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Article
| Open AccessMicrobial spatial footprint as a driver of soil carbon stabilization
The processes driving soil carbon accretion remain to be poorly understood. Here the authors combined X-ray micro-tomography and zymography to demonstrate that plant-stimulated soil pore formation is a major, hitherto unrecognized, determinant of whether new C inputs are stored or lost to the atmosphere.
- A. N. Kravchenko
- , A. K. Guber
- & Y. Kuzyakov
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Article
| Open AccessA neurotoxin that specifically targets Anopheles mosquitoes
So far identified clostridial neurotoxins target vertebrates. Here, Contreras et al. isolate the clostridial-like neurotoxin PMP1 from Paraclostridium bifermentans strains and show that it selectively targets anopheline mosquitoes by targeting mosquito syntaxin.
- Estefania Contreras
- , Geoffrey Masuyer
- & Sarjeet S. Gill
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| Open AccessGlobal impacts of future cropland expansion and intensification on agricultural markets and biodiversity
The increase in needs for agricultural commodities is projected to outpace the growth of farmland production globally, leading to high pressure on farming systems in the next decades. Here, the authors investigate the future impact of cropland expansion and intensification on agricultural markets and biodiversity, and suggest the need for balancing agricultural production with conservation goals.
- Florian Zabel
- , Ruth Delzeit
- & Tomáš Václavík
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| Open AccessClosing yield gaps for rice self-sufficiency in China
Whether or not China can be rice self-sufficient in the future is in question. Here the authors provide a spatially explicit yield-gap analysis of Chinese rice production under future scenarios, identifying priority areas for improving yields to meet demands by 2030.
- Nanyan Deng
- , Patricio Grassini
- & Shaobing Peng
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| Open AccessMeta-analysis reveals that pollinator functional diversity and abundance enhance crop pollination and yield
Pollinator communities could have nuanced effects on crop yield depending on their species and functional trait compositions. Here, the authors use a meta-analysis to show that, in addition to pollinator abundance, functional trait divergence also positively impacts yield of oilseed rape crops.
- B. A. Woodcock
- , M. P. D. Garratt
- & R. F. Pywell
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| Open AccessHumidity-tolerant rate-dependent capillary viscous adhesion of bee-collected pollen fluids
When bees carry pollen, it sticks to their legs and it can be carried without being dropped in a range of different humidity conditions. Here the authors find that the adhesive holding the pollen together consists of two phases and the oily phase stabilizes the aqueous phase with respect to humidity changes.
- Donglee Shin
- , Won Tae Choi
- & J. Carson Meredith
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Article
| Open AccessClothianidin seed-treatment has no detectable negative impact on honeybee colonies and their pathogens
There has been a lack of multi-year landscape-scale studies on the effect of neonicotinoids on honeybee health. Here, Osterman et al. show that clothianidin exposure via seed-treated rapeseed has no negative impact on honeybee colony development, microbial pathogens/symbionts or immune gene expression.
- Julia Osterman
- , Dimitry Wintermantel
- & Joachim R. de Miranda
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| Open AccessField-level clothianidin exposure affects bumblebees but generally not their pathogens
The potential impact of neonicotinoid field exposure on bumblebee microbiota remains unclear. In a landscape—scale study, Wintermantel et al. show that whilst exposure to clothianidin impacts Bombus terrestris performance, it does not affect levels of gut bacteria, viruses or intracellular parasites.
- Dimitry Wintermantel
- , Barbara Locke
- & Joachim R. de Miranda
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| Open AccessDiverging importance of drought stress for maize and winter wheat in Europe
Drivers of crop yield variability require quantification, and historical records can help in improving understanding. Here, Webber et al. report that drought stress will remain a key driver of yield losses in wheat and maize across Europe, and benefits from CO2 will be limited in low-yielding years.
- Heidi Webber
- , Frank Ewert
- & Daniel Wallach
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| Open AccessA global strategy to mitigate the environmental impact of China’s ruminant consumption boom
Rising demand for ruminant meat and dairy products in developing nations drives increasing GHG and ammonia emissions from livestock. Authors show here that only long-term adoption of global best-practice in sustainable intensification buffered by a short-term coping strategy of green-source trading can offer a way forward.
- Yuanyuan Du
- , Ying Ge
- & Raphael K. Didham
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| Open AccessPlant neighbor detection and allelochemical response are driven by root-secreted signaling chemicals
Plant growth and physiology respond to the presence of neighboring plants. Here the authors show that the chemicals (-)-loliolide and jasmonic acid, which were present in the root exudates of a range of plant species, can be detected by wheat and induce allelochemical production.
- Chui-Hua Kong
- , Song-Zhu Zhang
- & Peng Wang
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| Open AccessA global meta-analysis of yield stability in organic and conservation agriculture
Yields vary between different cropping systems, though their temporal stability has not been quantified. Here, Knapp and van der Heijden present a meta-analysis showing that yields in organic agriculture have, per unit food produced, a lower temporal stability.
- Samuel Knapp
- & Marcel G. A. van der Heijden
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| Open AccessA user-friendly herbicide derived from photo-responsive supramolecular vesicles
Paraquat is a widely used herbicide that is highly toxic to humans upon acute ingestion or chronic exposure. Here, the authors generate a photosensitive formulation that releases paraquat upon exposure to UV light or sunlight, which shows an improved safety profile in zebrafish and mouse models, while maintaining substantial herbicidal activity.
- Cheng Gao
- , Qiaoxian Huang
- & Ruibing Wang
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| Open AccessTwo-thirds of global cropland area impacted by climate oscillations
Climate oscillations such as El Niño Southern Oscillation may impact global crop production. Here, the authors, using a unified framework of multiple climate oscillations, find that from 1961 to 2010 over two-thirds of the global cropland is located where crop productivity is influenced by climate oscillations.
- Matias Heino
- , Michael J. Puma
- & Matti Kummu
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| Open AccessStructural change as a key component for agricultural non-CO2 mitigation efforts
To achieve the climate target of the Paris Agreement substantial emission reductions will be required across economic sectors. Here the authors show that agriculture can make a significant contribution to non-CO2 mitigation efforts through structural change in the livestock sector and the deployment of technical options.
- Stefan Frank
- , Robert Beach
- & Michael Obersteiner
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| Open AccessStrategies for feeding the world more sustainably with organic agriculture
Organic agriculture requires fewer inputs but produces lower yields than conventional farming. Here, via a modeling approach, Muller et al. predict that if food waste and meat consumption are reduced, organic agriculture could feed the world without requiring cropland expansion.
- Adrian Muller
- , Christian Schader
- & Urs Niggli
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| Open AccessReconciling irrigated food production with environmental flows for Sustainable Development Goals implementation
Sustainable development goals for water use and food production are in conflict, but this could be reduced by proper water management. Here, violations of global environmental flow requirements for rivers are quantified and related to reconciliation potentials in irrigated and rainfed agriculture.
- Jonas Jägermeyr
- , Amandine Pastor
- & Dieter Gerten
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| Open AccessLife cycle assessment needs predictive spatial modelling for biodiversity and ecosystem services
Life cycle assessments are used by corporations to determine the sustainability of raw source materials. Here, Chaplin-Krameret al. develop an improved life cycle assessment approach incorporating spatial variation in land-use change, and apply this framework to a bioplastic case study.
- Rebecca Chaplin-Kramer
- , Sarah Sim
- & Gretchen Daily
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| Open AccessLong-term trends in the intensity and relative toxicity of herbicide use
Quantifying the toxicity of herbicides applied in the field is difficult. Here, the author applies a quotient to evaluate changes in relative toxicity over the past 25 years and finds that increased herbicide use does not necessarily constitute increased toxicity.
- Andrew R. Kniss
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| Open AccessConsistent negative response of US crops to high temperatures in observations and crop models
Future agricultural productivity is threatened by high temperatures. Here, using 9 crop models, Schaubergeret al. find that yield losses due to temperatures >30 °C are captured by current models where yield losses by mild heat stress occur mainly due to water stress and can be buffered by irrigation.
- Bernhard Schauberger
- , Sotirios Archontoulis
- & Katja Frieler
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| Open AccessMassive yet grossly underestimated global costs of invasive insects
Invasive insects impose many economic costs, for example by consuming crops and spreading disease. Here, Bradshaw et al. compile a database of the costs of invasive insects and conservatively estimate that the yearly global cost (in 2014-equivalent US dollars) is at least $70 billion for goods and services and $6.9 billion for human health.
- Corey J. A. Bradshaw
- , Boris Leroy
- & Franck Courchamp
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| Open AccessImproving farming practices reduces the carbon footprint of spring wheat production
Wheat is the world’s second most favoured food source, yet its production has climatic consequences. Here the authors quantify the carbon footprint of wheat production systems and evaluate potential alternative farming practices, with a reduced negative impact on climate.
- Yantai Gan
- , Chang Liang
- & Robert P. Zentner
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Agronomic conditions and crop evolution in ancient Near East agriculture
The evolution of agronomic conditions after domestication in the Fertile Crescent remains poorly understood. Here, Araus et al. show that water availability and soil fertility for crops were higher in the past and that domesticated cereals showed a progressive increase in kernel size following domestication.
- José L. Araus
- , Juan P. Ferrio
- & Ramón Buxó
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The impact of agricultural emergence on the genetic history of African rainforest hunter-gatherers and agriculturalists
Agriculture emerged in West Africa 5,000 years ago but how this impacted the population of rainforest hunter-gatherers (RHGs) is unknown. Here, the authors show that modern-day RHG populations present up to 50% of farmer ancestry but admixture only occurred in the last 1,000 years.
- Etienne Patin
- , Katherine J. Siddle
- & Lluís Quintana-Murci
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| Open AccessDistinguishing between yield advances and yield plateaus in historical crop production trends
Food security and the conservation of natural ecosystems largely rely on the increase in crop yields. Here, the authors examine global crop yield trends since 1960, and establish a robust statistical framework for estimating historical trajectories and identifying yield plateaus.
- Patricio Grassini
- , Kent M. Eskridge
- & Kenneth G. Cassman
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Natural variation in PTB1 regulates rice seed setting rate by controlling pollen tube growth
Understanding the genetic factors that regulate panicle architecture is important for improving rice yields. In this study, Li et al. demonstrate that the gene PTB1is critical for regulating panicle seed setting rate and pollen tube growth.
- Shuangcheng Li
- , Wenbo Li
- & Ping Li
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| Open AccessRegional population collapse followed initial agriculture booms in mid-Holocene Europe
Between 8000 and 4000 BP, agriculture spread throughout Europe changing consumption patterns and increasing populations. Shennan et al. analyse radiocarbon date distributions and paleoclimate proxies to show that agriculture also triggered regional population oscillations and that climate forcing is an unlikely cause.
- Stephen Shennan
- , Sean S. Downey
- & Mark G. Thomas