Trialling tools using hand-weeding, weed mat and artificial shading to control nuisance macrophyte growth at multiple scales in small agricultural waterways
| Autor: | Helen J. Warburton, Kathryn E. Collins, Catherine M. Febria, Angus R. McIntosh, Jon S. Harding, Brandon C. Goeller, Kristy L. Hogsden, Hayley S. Devlin |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Excessive growth aquatic weeds 010501 environmental sciences Aquatic Science 01 natural sciences Erythranthe guttata Nasturtium microphyllum Drainage Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences Water Science and Technology Ecology business.industry 010604 marine biology & hydrobiology restoration tools Macrophyte Macrophyte control Agronomy Agriculture Environmental science Shading Weed business Nuisance agricultural waterways |
| Zdroj: | Great Lakes Institute for Environmental Research Publications |
| Popis: | Introduced aquatic macrophytes can dominate small agricultural waterways in summer and autumn becoming a significant management problem. Excessive growth can clog waterways, causing drainage issues and reducing agricultural productivity while in-stream velocities are reduced and sedimentation increased. Consequently, water managers remove them by mechanical clearance, chemical spray and cutting which can be costly and have negative impacts on in-stream habitat and ecological health. We trialled three tools to reduce macrophytes: hand-weeding, weed mat and artificial shading, at a reach-scale (50 m) and larger-scale (200–400 m). Hand-weeding reduced cover in the short-term, however macrophytes recovered to pre-treatment levels within one season. Weed mat along the banks was effective at reducing emergent macrophytes, particularly Erythranthe guttata (monkey musk) and Nasturtium microphyllum (watercress). Weed mat lasted for several growing seasons and continued to be effective. Shading over the waterway using polythene markedly reduced submerged macrophytes indicating that heavy shading by riparian plantings could reduce submerged macrophytes in the longer-term. These results indicate that in the short-term, weed mat could be used to limit sprawling emergent macrophytes. In the longer-term, weed mat used in conjunction with riparian planting could provide shading so that macrophyte cover in these small waterways could be reduced and controlled. |
| Databáze: | OpenAIRE |
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