Pest regulation: Restore habitat along watercourses

Overall effectiveness category Unknown effectiveness (limited evidence)
Number of studies: 1
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How is the evidence assessed?

Effectiveness

0%
Certainty

15%
Harms

25%

Calculating overall effectiveness category

Study locations

Key messages

Pest regulation (0 studies)

Crop damage (0 studies)

Ratio of natural enemies to pests (0 studies)

Pest numbers (1 study): One replicated site comparison from the USA found more weeds in orchards next to restored riparian habitats, compared to remnant habitats.

Natural enemy numbers (0 studies)

Implementation options (1 study): One replicated, site comparison from the USA found more weeds in orchards next to older restored sites, compared to younger restored sites.

About key messages

Key messages provide a descriptive index to studies we have found that test this intervention.

Studies are not directly comparable or of equal value. When making decisions based on this evidence, you should consider factors such as study size, study design, reported metrics and relevance of the study to your situation, rather than simply counting the number of studies that support a particular interpretation.

Supporting evidence from individual studies

A replicated site comparison in 1991–2004 in 26 riparian sites along the Sacramento River, California, USA, found more weed seeds in orchards next to restored habitat, compared to remnant habitat. Pest numbers: More weed seeds were found in orchards next to restored habitat, compared to remnant habitat (data reported as log abundance). Implementation options: More weed seeds were found in orchards next to older restored sites, compared to younger restored sites (data not reported). Methods: Soil samples were collected from 26 walnut plots, 0–5.6 km from restored riparian, remnant riparian, and agricultural habitats. Restored sites were formerly farmland. Restoration included disking, burning, furrowing, levelling, and spraying with herbicide, and replanting. On each walnut farm, soil samples (10 cm depth) were collected from seven points adjacent to restored or remnant forest and nine points within the walnut orchard, in March 2004. Seeds were germinated and identified in a greenhouse.
Study and other actions tested
Referenced paper
Langridge S.M. (2011) Limited effects of large-scale riparian restoration on seed banks in agriculture. Restoration Ecology, 19, 607-616.

Please cite as:

Shackelford, G. E., Kelsey, R., Robertson, R. J., Williams, D. R. & Dicks, L. V. (2017) Sustainable Agriculture in California and Mediterranean Climates: Evidence for the effects of selected interventions. Synopses of Conservation Evidence Series. University of Cambridge, Cambridge, UK.

Where has this evidence come from?

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This Action forms part of the Action Synopsis:

Mediterranean Farmland

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Soil: Exclude grazers Action Link	Unknown effectiveness (limited evidence)	6	Synopsis Link
Soil: Use reduced tillage in arable fields Action Link	Beneficial	40	Synopsis Link
Water: Use no tillage instead of reduced tillage Action Link	Likely to be beneficial	10	Synopsis Link