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Restoration of a mined restiad peat bog: from experiment to application

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Restoration of a mined restiad peat bog: from experiment to application

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    1. Restoration of a mined restiad peat bog: from experiment to application Louis Schipper, Bev Clarkson, and Corinne Watts Landcare Research, Hamilton

    2. Restiad Peat Bogs Threatened ecosystem, now confined to Waikato-Hauraki Plains Dominated by Empodisma minus and Sporadanthus ferrugineus

    6. 1. Restoration experiment Aim: To establish bog vegetation rapidly to decrease peat degradation Method: Factorial field experiment: 4 fertiliser applications (N, P, N+P, 0) 3 seed applications (manuka, Sporadanthus, 0) 2 cultivation/water table treatments (raised, 0) Plot size = 5X5m, n=72

    10. Total plant cover at two years Non-raised plots

    11. Available Phosphorus

    12. 1. Experiment Summary Veg growth & cover: raised plots better than non-raised above the winter flooding level milled peat had more nutrients than non-raised peat milled peat provided better rooting environment Raised plots with manuka seed ? very dense manuka, excluding other species On non-raised plots fertiliser increased cover

    13. Adaptations for whole mine restoration ‘Islands’ of processed peat scattered over mined surface Seeded with 1-2 branches of manuka slash Rationale: vegetated islands become a seed source for further species spread onto surrounding bare surface

    21. 2. Island Approach Summary Vegetation cover, height & species number are increasing Key peat-forming species establish early As cover increases, beetle composition (& invertebrates generally) becomes more similar to buffer zone Peat island technique effective in initiating restoration of plants & invertebrates in mined bogs Simple

    23. Acknowledgements FRST Russell Gamman Mining DOC - Rachel Kelleher, Shannon Fergie LCR - Maja Vojvodic-Vukovic, Matthew Taylor, Gary Barker, Neil Fitzgerald, Ray Webster, David Hunter EW - Karen Denyer, KPMG, New Zealand Peat (Bruce Smith)

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