proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: filazzola...
DESCRIPTION
An introductory explanation of nurse-plant mechanisms and how my research will try to document them. Presented at York University as a part of their weekly graduate series seminars.TRANSCRIPT
![Page 1: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/1.jpg)
Nurse-plant effects in arid environments and their possible usage as restoration tools
Alessandro Filazzola and Christopher LortieNovember 2013
![Page 2: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/2.jpg)
![Page 3: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/3.jpg)
![Page 4: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/4.jpg)
![Page 5: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/5.jpg)
![Page 6: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/6.jpg)
![Page 7: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/7.jpg)
![Page 8: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/8.jpg)
Aral Sea
![Page 9: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/9.jpg)
Aral Sea
![Page 10: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/10.jpg)
Diversity of the Desert
![Page 11: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/11.jpg)
Stress Gradient Hypothesis
Major theories examined
Malkinson & Tielbörger 2010
![Page 12: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/12.jpg)
SGH extension to apply to disturbance◦ Biotic stress gradient
Nurse-plants can reduce disturbance ◦ Shared defences (thorns/branches)◦ Reduced palatability of neighbours◦ Associational resistance
Major theories examined
![Page 13: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/13.jpg)
Indirect facilitation◦ Apparent competition◦ Mycorrhiza colonization◦ Seed trapping◦ Magnet species concept
Major theories examined
Molina‐Montenegro et al. 2008
![Page 14: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/14.jpg)
Research Project
![Page 15: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/15.jpg)
Abiotic stress amelioration
Substrate modification
Herbivore protection
Soil modificationPollinator visitation
Seed trapping
PLANT GROWTH
SEEDLINGREPRODUCTION
Nurse-mediated evolutionSEED
Nurse-mediated distribution
A conceptual framework summarizing nurse-plant mechanisms by protégé life-stage
![Page 16: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/16.jpg)
![Page 17: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/17.jpg)
Abiotic stress amelioration
Substrate modification
Herbivore protection
Soil modificationPollinator visitation
Seed trapping
PLANT GROWTH
SEEDLINGREPRODUCTION
Nurse-mediated evolutionSEED
Nurse-mediated distribution
A conceptual framework summarizing nurse-plant mechanisms by protégé life-stage
![Page 18: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/18.jpg)
Nurse Mechanism
Seed Trapping
Substrate Modification
Abiotic Stress Amelioration
Herbivore Protection
Pollinator Visitation
Nurse-mediate distribution
Nurse-mediated evolution
Responding life-
stage
Seeds
Germination
Plant Growth
Reproduction
![Page 19: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/19.jpg)
Mojave National Preserve
A – Effect of Larea spp. (+/-) on vegetation + seedbank by size + elevation (add sand disposition)B – Facilitated seed arrival of Larea spp. (+/-)C – Compare transient and persistent seedbank
2.1 313 m
2.2 515 m
2.3737 m
2.4951 m
2.51128 m
Gradient environmental measures
- Light- Temp- Moisture- Wind
Progress to date
![Page 20: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/20.jpg)
Site 1.3North Facing
Site 1.2South Facing
Site 1.1Plateau
Panoche Hills
A – Effect of Ephedra spp. (+/-) on vegetation + seedbank by size + aspect (N,S,0)B – Facilitated seed arrival of Ephedra spp. (+/-)C – Pollinator facilitation by Ephedra spp. using pan-traps + Ipod Nanos (+/-). D – Ephedra spp. traits as a habitat for K. rats + L. lizards
Parking Lot
- Light- Temp- Moisture- Wind
![Page 21: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/21.jpg)
Progress
Mammal/BirdExclusion
InsectExclusion
Control -No Exclusion
Control +Full Exclusion
![Page 22: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/22.jpg)
Progress to date
![Page 23: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/23.jpg)
![Page 24: Proposal for nurse-plant effects on mechanistic pathways for different plant life-stages: Filazzola & Lortie](https://reader035.vdocument.in/reader035/viewer/2022081603/559137591a28ab19498b45c1/html5/thumbnails/24.jpg)
Thank you!