Upload
shirley-smith
View
552
Download
1
Embed Size (px)
DESCRIPTION
This presentation by Ben Simon illustrates revegetation methods of hand seeding, direct seeding, seeding planting and natural revegetation. It also covers plant placement, site design, how to work around creeks and concludes with check list.
Citation preview
Revegetation Site Design
Revegetation Methods
• Natural regeneration
• Tubestock or seedling planting
• Machine direct seeding
• Hand direct seeding
Natural regeneration• Method where weeds and other threats(eg stock) are
removed to allow native plant seed to germinate.• Only used where there is adequate natural seed-eg
buffer, remnant.• Usually used in areas where a lot of native vegetation
remains or there is a good natural seed bank in the soil• Often used to promote understorey species.• Cheap and easy method so long as follow up threat
management is undertaken• Provides good habitat as germination and subsequent
plant location is random in space and time.• In red gum(& other) sites be wary of over-dominance
where other species may be unlikely to regenerate-e.g. ex paddock
• Patience is required so don’t rush in and reveg
Natural Regeneration
Tubestock planting• Greater control over planting density & position • Greater control over revegetation layout, spatial
arrangement of plants & species selection • More labour intensive and costs more than
direct seeding• Often requires Tree Guards• Requires plants to be grown in advance and so
more planning & weather risks • More appropriate where existing understorey or
a good base exists-e.g. Grassy woodland or existing over-storey with flogged understorey
• Good for infill planting• Uses less seed resources than direct seeding
Revegetation with tubestock
Direct seeding• 2 methods – Machine and hand• Limited control over planting density with Machine
seeding• Can end up with un-natural lines of plants with machine
seeding- dependant on operator/client• Cheaper, quicker and easier than planting tubestock.• Seed can be collected from remnant vegetation,
revegetation sites, or grown in seed orchards.• Method used depends on;
– seed type and amount available-lots of seed with machine.– terrain– Climate– Weed abundance on the site– Native groundcover plants present on the site (machine direct
seeding is high disturbance)– Soil type-e.g. V-blade seeding on non-wetting sands
Direct seeding continued….• Historically seed mixes don’t always match the
vegetation type being replaced-sometimes too much variety!
• Can be a great way to establish a dominant species back into a site prior to coming back later and placing more diversity with tube stock
• Can continue to germinate for several years after sowing as weather permits
Machine Direct seeding
Reveg
Remnant
Machine seeding with natural thinning
Combination of machine direct seeding and tubestock planting
Hand Direct Seeding
Hedging your bets
Placement of plants
Reducing creek line erosion
Revegetation Site DesignConsiderations
– Purpose of the revegetation – for a windbreak or biodiversity?– The habitat type being planted-how do you choose?– The natural spatial arrangement of plants in that particular
habitat type.– Site history – agricultural use, cultivation, herbicides.– Site location – Planting in a random manner where possible– Creating diversity of habitats on larger sites– Matching vegetation to soil types and the local climate– The proportion of existing natural vegetation on the site– The size of the site– The method of revegetation that can be used given the terrain
and environmental factors – Undertaking adequate weed and pest animal management – pre
and post planting– The seed and plant resources, time, and money available– The ability for ongoing management to be undertaken– Roos and other grazing pressures
Broad site checklist• Always assess existing plants, soils, threats,
opportunities & indicators on site & record them
• Closely observe nearby remnants for guidance on species selection & seed resources-and record it
• Discuss findings with the landholder & provide with species list ASAP-involve & listen to them
• Think about plant association/s and try and balance species proportions accordingly-16+species???
• If you don’t know how to approach a technical issue get help from others
• Does the proposed site actually need revegetation?
• Create a map of project & ensure all parties understand where, how, when & what is being done
• Hone plant ID skills as it is such as valuable skill for so many reasons(funding, planning & inspiring)
• Record species suitable for reveg-key structural species on site
• Choose method of reveg that is most practical, ethical and achievable
• Plan well in advance- if you can • Keep good records and always take plenty of
pics.• Don’t forget about managing remnant vegetation
and where possible incorporate revegetation to link, buffer or enhance existing remnants.
Any Questions