This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: University of Melbourne researchers have found that planting native gardens on suburban nature strips can boost urban biodiversity, with insect numbers increasing sevenfold and the number of species approximately doubling. In a study published today in the Journal of Applied Ecology, researchers examined the effects of planting habitat gardens on nature strips across Merri-bek City Council in Melbourne's north.
They compared the strips before and after planting to measure how these overlooked urban spaces can support native pollinators. Philippa Bell, a University of Melbourne researcher in the School of Agriculture, Food and Ecosystem Sciences, said insect pollinators such as bees, beetles and butterflies are vital to ecosystems, yet many species are declining because of habitat loss and environmental change. "As pollinator populations decline, the ecosystems and agricultural industries that depend on them face increasing pressure," Bell said.
"Like us, insects need food and shelter to survive and thrive. Traditional lawn nature strips offer little in the way of shelter, and frequently mowed lawns rarely allow plants to flower." Following the addition of native habitat gardens, insect abundance was seven times higher and the number of species was approximately double that of conventional grass-covered nature strips. The strongest response came from bees, which were closely associated with the abundance and diversity of flowering plants in the gardens.
Butterflies and beetles also responded positively, although the effects were more variable. "Bees showed the strongest affinity for these gardens and were positively associated with the number of flowers and the number of different plants in flower," Bell said. Bell said nature strips, also called road verges, are found throughout cities and offer an opportunity to create connected habitats for insect pollinators and other wildlife.
"Road verges are ubiquitous across cities and usually contain simplified vegetation that offers little value to urban fauna," Bell said. "While individual nature-strip gardens are a great start, collective urban-greening actions on nature strips have the capacity to effectively support pollinators in cities." The findings have implications for local governments and policymakers seeking ways to improve biodiversity in urban environments. Councils across Greater Melbourne already permit residents to garden in nature strips, and many actively encourage the practice through urban greening and biodiversity programs.
"Many people still hold the perception that gardening in their nature strip is prohibited or discouraged, but councils across Greater Melbourne permit it. We encourage residents to check their local council guidelines and consider getting involved," Bell said. "This research provides evidence that can support council investment in nature-strip gardening and help inform future biodiversity strategies." Beyond biodiversity, Bell said nature strips can also provide social benefits.
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