biodiversity offset and banksia woodland

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Presenter: @PWaryszak Banksia woodland & biodiversit y offset

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Page 1: Biodiversity Offset and Banksia Woodland

Presenter: @PWaryszak

Banksia woodland

& biodiversity

offset

Page 2: Biodiversity Offset and Banksia Woodland

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

Page 3: Biodiversity Offset and Banksia Woodland

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)

Page 4: Biodiversity Offset and Banksia Woodland

2015June September December 2013-2014March 2012

Murdoch University

Jandakot Airport

Forestdale Lake

Anketell Road

Page 5: Biodiversity Offset and Banksia Woodland

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

Page 6: Biodiversity Offset and Banksia Woodland

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)

Page 7: Biodiversity Offset and Banksia Woodland

March

Treatments Design

2015June September December 2013-2014March

Disp

ersa

lAbiotic

Biotic

Page 8: Biodiversity Offset and Banksia Woodland

June September DecemberMarch

OVERVIEW

June September December 2013-2014March

ripped

unripped

ripped

unripped

Page 9: Biodiversity Offset and Banksia Woodland

Plot (4m²) Treatments Layout

Page 10: Biodiversity Offset and Banksia Woodland

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

Page 11: Biodiversity Offset and Banksia Woodland

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

Page 12: Biodiversity Offset and Banksia Woodland

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

Page 13: Biodiversity Offset and Banksia Woodland

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

Page 14: Biodiversity Offset and Banksia Woodland

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

Page 15: Biodiversity Offset and Banksia Woodland

June September DecemberMarch

June September December 2013-2014March

Data: Site-scale Treatments. SUMMARY.

Diversity Index ~ Plant Density (0.7)YEAR

Error=95% CI

Page 16: Biodiversity Offset and Banksia Woodland

June September DecemberMarch

June September December 2013-2014March

Data: Site-scale Treatments. Interactions.

Error=95% CI

YEAR

Page 17: Biodiversity Offset and Banksia Woodland

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

Page 18: Biodiversity Offset and Banksia Woodland

Seedlings Guess Work

Page 19: Biodiversity Offset and Banksia Woodland

Seedlings Guess Work

Page 20: Biodiversity Offset and Banksia Woodland

Seedlings Guess Work

Page 21: Biodiversity Offset and Banksia Woodland

Seedlings Guess Work

Page 22: Biodiversity Offset and Banksia Woodland

Seedlings Guess Work

Page 23: Biodiversity Offset and Banksia Woodland

Seedlings Guess Work

Page 24: Biodiversity Offset and Banksia Woodland

Seedlings Guess Work

Page 25: Biodiversity Offset and Banksia Woodland

Seedlings Guess Work

Page 26: Biodiversity Offset and Banksia Woodland

Seedlings Guess Work

Page 27: Biodiversity Offset and Banksia Woodland

Survival in Year II (mean densities ±SE)

Page 28: Biodiversity Offset and Banksia Woodland

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

Page 29: Biodiversity Offset and Banksia Woodland

Native emergence abundant.

Climate = important abiotic

filter to consider ($$$)

CONCLUSIONS

Very low survival.

Page 30: Biodiversity Offset and Banksia Woodland

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

Page 31: Biodiversity Offset and Banksia Woodland

June September DecemberMarch

June September December 2013-2014March

Data: % Composition of Growth Forms

Woody -86% highest in ripped

77-79% even

Page 32: Biodiversity Offset and Banksia Woodland

June September DecemberMarch

June September December 2013-2014March

Data: % Input of Nitrogen Fixers

N-fixers: 18-21% even

N-fixers: 55% highest in ripped

Page 33: Biodiversity Offset and Banksia Woodland

June September DecemberMarch

June September December 2013-2014March

Data: % Input of Resprouters

61%Fowler (2015)

Resp: 31-34% even

Resp: 22-27%

Page 34: Biodiversity Offset and Banksia Woodland

Site-scale Treatment Survival

Page 35: Biodiversity Offset and Banksia Woodland

Data: Plot-scale Treatments. Year I

Error=95% CI

Page 36: Biodiversity Offset and Banksia Woodland

Diversity Index ~ Plant Density