| Records |
| Author |
Sandhu, H.; Wratten, S.; Costanza, R.; Pretty, J.; Porter, J.R.; Reganold, J. |
| Title |
Significance and value of non-traded ecosystem services on farmland |
Type |
Journal Article |
| Year |
2015 |
Publication |
PeerJ |
Abbreviated Journal |
PeerJ |
| Volume |
3 |
Issue |
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Pages |
e762 |
| Keywords |
Agroecosystems; Arable farmland; Economic value; Ecosystem services; Externalities; New Zealand |
| Abstract |
Background. Ecosystem services (ES) generated within agricultural landscapes, including field boundaries, are vital for the sustainable supply of food and fibre. However, the value of ES in agriculture has not been quantified experimentally and then extrapolated globally. Methods. We quantified the economic value of two key but contrasting ES (biological control of pests and nitrogen mineralisation) provided by non-traded non-crop species in ten organic and ten conventional arable fields in New Zealand using field experiments. The arable crops grown, same for each organic and conventional pair, were peas (Pisum sativum), beans (Phaseolus vulgaris), barley (Hordeum vulgare), and wheat (Triticum aestivum). Organic systems were chosen as comparators not because they are the only forms of sustainable agriculture, but because they are subject to easily understood standards. Results. We found that organic farming systems depended on fewer external inputs and produced outputs of energy and crop dry matter generally less than but sometimes similar to those of their conventional counterparts. The economic values of the two selected ES were greater for the organic systems in all four crops, ranging from US$ 68-200 ha(-1) yr(-1) for biological control of pests and from US$ 110-425 ha(-1)yr(-1) for N mineralisation in the organic systems versus US$ 0 ha(-1)yr(-1) for biological control of pests and from US$ 60-244 ha(-1)yr(-1) for N mineralisation in the conventional systems. The total economic value (including market and non-market components) was significantly greater in organic systems, ranging from US$ 1750-4536 ha(-1)yr(-1), with US$ 1585-2560 ha(-1)yr(-1) in the conventional systems. The non-market component of the economic value in organic fields was also significantly higher than those in conventional fields. Discussion. To illustrate the potential magnitude of these two ES to temperate farming systems and agricultural landscapes elsewhere, we then extrapolate these experimentally derived figures to the global temperate cropping area of the same arable crops. We found that the extrapolated net value of the these two services provided by non-traded species could exceed the combined current global costs of pesticide and fertiliser inputs, even if utilised on only 10% of the global arable area. This approach strengthens the case for ES-rich agricultural systems, provided by non-traded species to global agriculture. |
| Address |
2016-10-31 |
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Place of Publication |
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| Language |
English |
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Original Title |
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| ISSN |
2167-8359 |
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| Notes |
CropM |
Approved |
no |
Call Number  |
MA @ admin @ |
Serial |
4807 |
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| Author |
Porter, J.R.; Christensen, S. |
| Title |
Deconstructing crop processes and models via identities |
Type |
Journal Article |
| Year |
2013 |
Publication |
Plant Cell and Environment |
Abbreviated Journal |
Plant Cell and Environment |
| Volume |
36 |
Issue |
11 |
Pages |
1919-1925 |
| Keywords |
Biomass; Carbon Dioxide/pharmacology; Climate Change; Crops, Agricultural/drug effects/*physiology; *Models, Biological; Kaya-Porter identity; crop models; deconstruction; resource use efficiency |
| Abstract |
This paper is part review and part opinion piece; it has three parts of increasing novelty and speculation in approach. The first presents an overview of how some of the major crop simulation models approach the issue of simulating the responses of crops to changing climatic and weather variables, mainly atmospheric CO2 concentration and increased and/or varying temperatures. It illustrates an important principle in models of a single cause having alternative effects and vice versa. The second part suggests some features, mostly missing in current crop models, that need to be included in the future, focussing on extreme events such as high temperature or extreme drought. The final opinion part is speculative but novel. It describes an approach to deconstruct resource use efficiencies into their constituent identities or elements based on the Kaya-Porter identity, each of which can be examined for responses to climate and climatic change. We give no promise that the final part is correct’, but we hope it can be a stimulation to thought, hypothesis and experiment, and perhaps a new modelling approach. |
| Address |
2016-10-31 |
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English |
Summary Language |
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Edition |
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| ISSN |
0140-7791 |
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Article |
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| Notes |
CropM, ft_macsur |
Approved |
no |
| Call Number |
MA @ admin @ |
Serial |
4799 |
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| Author |
Porter, J.R.; Xie, L.; Challinor, A.J.; Cochrane, K.; Howden, S.M.; Iqbal, M.M.; Lobell, D.B.; Travasso, M.I. |
| Title |
Food security and food production systems |
Type |
Book Chapter |
| Year |
2014 |
Publication |
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Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
485-533 |
| Keywords |
CropM |
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Cambridge University Press |
Place of Publication |
Cambridge, United Kingdom and New York, NY, USA |
Editor |
Field, C.B.; Barros, V.R.; Dokken, D.J.; Mach, K.J.; Mastrandrea, M.D.; Bilir, T.E.; Chatterjee, M.; Ebi, K.L.; Estrada, Y.O.; Genova, R.C.; Girma, B.; Kissel, E.S.; Levy, A.N.; MacCracken, S.; Mastrandrea, P.R.; White, L.L. |
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Part A: Global and Sectoral Aspects. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel of Climate Change (IPCC) |
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Climate Change 2014: Impacts, Adaptation, and Vuln |
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no |
| Call Number |
MA @ admin @ |
Serial |
2734 |
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| Author |
Porter, J.R.; Soussana, J.-F.; Fereres, E.; Long, S.; Mohren, F.; Peltonen-Sainio, P.; von Braun, J. |
| Title |
European Perspectives: An Agronomic Science Plan for Food Security in a Changing Climate |
Type |
Book Chapter |
| Year |
2012 |
Publication |
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Abbreviated Journal |
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Pages |
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CropM |
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Co-Published With Imperial College Press |
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Editor |
Hillel, D.; Rosenzweig, C. |
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Series Title |
Handbook of Climate Change and Agroecosystems: Global and Regional Aspects and Implications |
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| Series Volume |
ICP Series on Climate Change Impacts, Adaptation, |
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Approved |
no |
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MA @ admin @ |
Serial |
2732 |
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| Author |
Nendel, C.; Ewert, F.; Rötter, R.P.; Rosenzweig, C.; Jones, J.W.; Hatfield, J.L.; Asseng, S.; Ruane, A.C.; Banse, M.; Tiffin, R.; Brouwer, F.; Sinabell, F.; Scollan, N.; Meijs, J.; Angulo, C.; Antle, J.M.; Baigorria, G.; Basso, B.; Bindi, M.; Boote, K.J.; Gaiser, T.; Janssen, S.; Kersebaum, K.C.; Nelson, G.; Olesen, J.E.; Palosuo, T.; Porter, C.H.; Porter, J.R.; Rivington, M.; Semenov, M.; Stewart, D.; Thorburn, P.; Trnka, M.; van Ittersum, M.K.; Verhagen, J.; Wallach, D.; Winter, J.M. |
| Title |
Addressing challenges and uncertainties for, the use of agro-ecosystem models to, assess climate change impact and food security across scales |
Type |
Conference Article |
| Year |
2013 |
Publication |
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Abbreviated Journal |
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CropM |
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Conference |
Climate Change and Regional Responses Conference, Dresden, 2013-05-27 to 2013-05-27 |
| Notes |
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Approved |
no |
| Call Number |
MA @ admin @ |
Serial |
2679 |
| Permanent link to this record |
