Ecosystem services/Description: Difference between revisions
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Natural pest control reduces pest occurrence in agriculture fields as a result of the presence of predator species ([[Thies et al., 2003]]; [[Boccaccio and Petacchi, 2009]]; [[Rusch et al., 2011]]). This leads to higher yields than in fields without natural or technical pest control. Natural pest control requires sufficient natural elements to house predator species close to agricultural fields. Pest control is assumed to be effective on agricultural fields within 2 km of forests and other natural elements ([[Bianchi et al., 2005]]). This can be translated into a correlation between the percentage of natural elements in a grid cell and the effectiveness of biological pest control ([[Thies et al., 2003]]; [[Boccaccio and Petacchi, 2009]]; [[Rusch et al., 2011]]). | Natural pest control reduces pest occurrence in agriculture fields as a result of the presence of predator species ([[Thies et al., 2003]]; [[Boccaccio and Petacchi, 2009]]; [[Rusch et al., 2011]]). This leads to higher yields than in fields without natural or technical pest control. Natural pest control requires sufficient natural elements to house predator species close to agricultural fields. Pest control is assumed to be effective on agricultural fields within 2 km of forests and other natural elements ([[Bianchi et al., 2005]]). This can be translated into a correlation between the percentage of natural elements in a grid cell and the effectiveness of biological pest control ([[Thies et al., 2003]]; [[Boccaccio and Petacchi, 2009]]; [[Rusch et al., 2011]]). | ||
Hawkins and Cornell ([[Hawkins and Cornell, 1994|Hawkins and Cornell | Hawkins and Cornell ([[Hawkins and Cornell, 1994|Hawkins and Cornell|1994]]) indicate that natural pest control is no longer successful when the percentage of pest insects killed falls below 32 to 36%. This corresponds with 37 to 43% of nature in a grid cell. The model does not consider natural pest control by soil fauna present in the field. | ||
The supply of natural pest control is determined by the percentage of nature in a grid cell All cropland is assumed to potentially require effective natural pest control. The pest control budget is calculated by dividing the cropland area in cells with more than 40% of natural elements by the total cropland area. | The supply of natural pest control is determined by the percentage of nature in a grid cell All cropland is assumed to potentially require effective natural pest control. The pest control budget is calculated by dividing the cropland area in cells with more than 40% of natural elements by the total cropland area. | ||
Revision as of 07:48, 20 May 2014
Parts of Ecosystem services/Description
