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Presenter: @PWaryszak
Banksia woodland
& biodiversity
offset
2012-2014 ONGOING February Maypre-2012
BACKROUND DATA ANALYSIS SEEDLINGS SURVIVAL
DESIGN & IMPLEMENTATION
SEEDLING EMERGENCE
Plant Traits & Soil Properties
Analysis
August
OUTLINE
HISTORY
EXPERIMENT rCHAPTER I CHAPTER III
CHAPTER II
Old LandscapeNutrient poor soilsHeatFire
Mediterranean Type Ecosystems
We do not know how to propagate50% new to science since 19906759 plant species in SWA & still growing (Hopper 2004)80% of Banksia Woodlands cleared (TEC listing).
High Dormancy (Topsoil)
2015June September December 2013-2014March 2012
Murdoch University
Jandakot Airport
Forestdale Lake
Anketell Road
History of Topsoil Soil Seed Bank Transfer
• Cost-effective biodiversity return versus planting
Time of the year is very important
Direct Transfer
• Pioneering work by Alcoa in Jarrah Forest (1963) but only in mine (clay) settings
• Important lessons:
Topsoil a restoration tool
to mitigate environmental
filters?
• Clear Land, Strip, Dig, Re-apply
Regional species pool
Local community
Dispersal filter
Filter model to test the success
Dispersal Limitation
(depths treatment)
Abiotic Barrier (ripping
treatment)
Biotic Barrier (herbivory exclosures treatment)
March
Treatments Design
2015June September December 2013-2014March
Disp
ersa
lAbiotic
Biotic
June September DecemberMarch
OVERVIEW
June September December 2013-2014March
ripped
unripped
ripped
unripped
Plot (4m²) Treatments Layout
JuneMarch
Plot-size (4m²) Treatments
2015June September December 2013-2014March
1. Smoke Water Only2. S. Water + Plastic3. Plastic Cover Only
4. Heat
Weed Control
872.8
733.4
No summer storms
1905-47 1986-2011 2012 2013
June September DecemberMarch
June September December 2013-2014March
Emergence of native perennials in year I (log-transformed, n=192)
Data: Site-scale Treatments
Error=95% CI
YEAR
June September DecemberMarch
June September December 2013-2014March
Emergence of native perennials in year II (log-transformed, n>282)
Data: Site-scale Treatments
Error=95% CI
YEAR
June September DecemberMarch
June September December 2013-2014March
Emergence of native annuals in year I (log-transformed, n=192)
Data: Site-scale Treatments
Error=95% CI
YEAR
June September DecemberMarch
June September December 2013-2014March
Emergence of native annuals in year II (log-transformed, n>282)
Data: Site-scale Treatments
Error=95% CI
YEAR
June September DecemberMarch
June September December 2013-2014March
Data: Site-scale Treatments. SUMMARY.
Diversity Index ~ Plant Density (0.7)YEAR
Error=95% CI
June September DecemberMarch
June September December 2013-2014March
Data: Site-scale Treatments. Interactions.
Error=95% CI
YEAR
June September DecemberMarch
June September December 2013-2014March
Data: Most Abundant Native Families
Year II Perennial:• Ericaceae• Fabaceae• Dilleniaceae
Year II Annual:• Asteraceae• Araliaceae• Crassulaceae
Year I Perennial:• Fabaceae• Ericaceae• Asparagaceae
Year I Annual:• Asteraceae• Araliaceae• Crassulaceae
Nr Species Year I Year II
Annual 28 26
Perennial 101 89
Total 129 115
Seedlings Guess Work
Seedlings Guess Work
Seedlings Guess Work
Seedlings Guess Work
Seedlings Guess Work
Seedlings Guess Work
Seedlings Guess Work
Seedlings Guess Work
Seedlings Guess Work
Survival in Year II (mean densities ±SE)
Trait Suit Winner Trait Suit Runner-up
NATIVE NO
N-FIXER NO
RESPROUTER YES
WOODY NO
GROWTH CATEGORY WOODY
SEED SIZE SMALL
MAXIMUM HEIGHT 0.7 m
NATIVE YES
N-FIXER YES
RESPROUTER NO
WOODY YES
GROWTH CATEGORY WOODY
SEED SIZE SMALL
MAXIMUM HEIGHT 1.0 m
Native emergence abundant.
Climate = important abiotic
filter to consider ($$$)
CONCLUSIONS
Very low survival.
THANK YOU
@PWaryszak
Industry Partners: JAH DEC/DPaW
Supervisors: 1. Dr Joe Fontaine,2. Prof. Neal Enright,3. Dr Phil Ladd,4. Dr Rachel Standish
June September DecemberMarch
June September December 2013-2014March
Data: % Composition of Growth Forms
Woody -86% highest in ripped
77-79% even
June September DecemberMarch
June September December 2013-2014March
Data: % Input of Nitrogen Fixers
N-fixers: 18-21% even
N-fixers: 55% highest in ripped
June September DecemberMarch
June September December 2013-2014March
Data: % Input of Resprouters
61%Fowler (2015)
Resp: 31-34% even
Resp: 22-27%
Site-scale Treatment Survival
Data: Plot-scale Treatments. Year I
Error=95% CI
Diversity Index ~ Plant Density
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