1. A synthesis of dryland restoration
techniques
Contact information
mflormiguel@gmail.com
Florencia Miguel (ResearchGate)
M Florencia Miguel, Christopher J Lortie, H Scott Butterfield
1
ensia.com
2. Main objetives
To conduct a meta-analysis of techniques for
vegetation restoration on drylands globally.
To determine the most effective techniques for
vegetation restoration on drylands.
Main
questions
1. What is the global extent of research that directly
examined restoration of drylands?
2. What were the common measures?
3. Is the restoration of vegetation a common and
primary focus?
4. How relatively effective were the techniques?
2
3. ➢ Search- Literature compilation
3
- Web of Science and Scopus
- restoration desert vegetation
- Published articles with available data
- No reviews, no book chapters
- Filter by journals and select english language
Bibliometric resources
Inclusion criteria
Terms
4. ➢ Sort
PRISMA report
4
Duplicates removed
Rational for exclusion:
review, not restoration, not
drylands, no data,
theoretical
N° of articles to
extract data= 178
11. 11
Intervention Techniques
Carbon amendment
carbon amendment
carbon addition, top soil removal
Mycorrhizal inoculation mycorrhizal inoculation
Nutrients
nutrients addition
fertilization, biostimulants, seeding
Planting
planting
planting, grazing exclusion
fertile islands
Seeding
seeding, soil amendment
seeding
seeding, planting
seeding, mulching, weeding
seeding, herbicides, activated carbon
seeding, fencing
seeding, irrigation
seeding, mowing and herbicide, mulching (straw and
sawdust)
seeding, ripped, disked, fertilization
seeding, grazing
seeding, seedbed preparation
Vegetation
herbicide
mowing, grazing
Water addition
seeding, irrigation
water addition
planting, irrigation, mulch
irrigation
irrigation, planting, weed control
Articles with data
extracted n= 80
Active type of
restoration
Statistics
12. ➢ Statistics
Active interventions mean effect sizes, relevance and p-values
n= 80
12
Active interventions Mean effect size Relevance p-value
Carbon amendment -0.7156 Medium 0.02
Mycorrhizal inoculation 0.7569 Large 0.68
Nutrients 0.1106 Small <0.0001
Planting 0.3645 Medium <0.0001
Seeding -0.3096 Small <0.0001
Vegetation 0.3581 Medium 0.01
Water addition 0.9771 Large 0.05
0-50% change: small
51-100% change: medium
101% change: large
13. 13
No effect Increase in the level
of an outcome
Decrease in the level
of an outcome
+
+
+
-
+
+
-
Outcomes
14. 14
Effect size p-value Intervention Technique
- M 0.02 Carbon amendment
carbon amendment
carbon addition, top soil removal, seeding
+ L 0.68 Mycorrhizal inoculation mycorrhizal inoculation
+ S <0.0001 Nutrients
nutrients addition
fertilization, biostimulants, seeding
+ M Planting
planting
<0.0001 planting, grazing exclusion
fertile islands
- S <0.0001 Seeding
seeding, soil amendment
seeding
seeding, planting
seeding, mulching, weeding
seeding, herbicides, activated carbon
seeding, fencing
seeding, irrigation
seeding, mowing and herbicide, mulching (straw
and sawdust)
seeding, ripped, disked, fertilization
seeding, grazing
seeding, seedbed preparation
+ M 0.01 Vegetation
herbicide
mowing, grazing
+ L 0.05 Water addition
seeding, irrigation
water addition
planting, irrigation, mulch
irrigation
irrigation, planting, weed control
15. 15
To consider
Control or benchmark situation to compare intervention effects (16/80, 20% of
evaluated articles did not include a control situation)
Cost evaluation of active techniques
Modified systems productivity and functions scarcely evaluated
Plant-animal positive interactions (e.g. seed dispersal, pollination) scarcely
evaluated