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Green roofs in the tropics: design considerations and vegetation dynamics
Iana F Grullón-Penkova1, Jess K Zimmerman1, Grizelle González2
1Department of Environmental Sciences, University of Puerto Rico, 17 Avenida Universidad, Río Piedras, PR 00921, USA.
Green roofs offer sustainable urban solutions. This study identifies suitable plant species for tropical green roofs, addressing a research gap and providing management recommendations.
Area of Science:
- Urban Ecology
- Horticulture
- Environmental Science
Background:
- Green roofs (GR) are recognized for mitigating urban stressors and promoting sustainability.
- Existing green roof research predominantly focuses on temperate climates, neglecting tropical regions.
- Further development is needed in the ecological attributes and plant selection for tropical green roof designs.
Purpose of the Study:
- To conduct a descriptive analysis of plant species suitable for green roof designs in tropical climates.
- To address the knowledge gap in tropical green roof research, which has been historically overlooked.
- To identify plant species dynamics and suggest suitable vegetation for Puerto Rican green roofs.
Main Methods:
- A case study approach was employed, analyzing vegetation dynamics on established green roofs in Puerto Rico.
- The Point-Intercept Method was utilized for vegetation surveys to capture green infrastructure characteristics.
- Data from surveys and other tropical countries were synthesized to inform species selection.
Main Results:
- Most originally planted species were not found; instead, new species dominated the green roof ecosystems.
- Vegetation surveys revealed significant shifts in species composition over time.
- A list of suitable plant species for tropical green roofs was compiled based on findings.
Conclusions:
- Plant species composition on tropical green roofs can differ significantly from initial plantings.
- Recommendations for improved management practices in tropical green roof systems are provided.
- This research contributes valuable insights for the design and implementation of effective tropical green roofs.
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