Study

Green roof performance towards good habitat for butterflies in the compact city

  • Published source details Lee L.-H. & Lin J.-C. (2015) Green roof performance towards good habitat for butterflies in the compact city. International Journal of Biology, 7, 103-112.

Actions

This study is summarised as evidence for the following.

Action Category

Establish “green infrastructure” in urban areas

Action Link
Butterfly and Moth Conservation
  1. Establish “green infrastructure” in urban areas

    A replicated, site comparison study in 2011–2012 on 11 green roofs in Taipei City, Taiwan (Lee & Lin 2015) found that green roofs had a lower abundance and species richness of butterflies than urban parks, but the abundance of butterflies was higher on older green roofs with more nectar plant species in a larger area. On green roofs, both the abundance (514 individuals) and species richness (12 species) of butterflies was lower than in urban parks (abundance: 3,141–8,882 butterflies; richness: 50–109 species). However, the abundance of butterflies was higher on green roofs established longer ago, and on roofs with more nectar plant species covering a larger area (data presented as model results). Eleven green roofs (95–590 m2, 7–34 m above ground), established 13–46 months before the study, contained a total of 34 butterfly nectar plant species (1–16 species/roof, covering 2–41 m2). Two urban parks (13–26 ha), established 18–25 years before the study, contained 20–45 nectar plant species. From August 2011–May 2012, butterflies were surveyed for four hours twice/month on each roof. From July 2008–June 2009, butterflies were surveyed in one urban park, and from March 2011–February 2012 they were surveyed in a second park (no further details provided).

    (Summarised by: Andrew Bladon)

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