Pollinators are in trouble but there’s a lot we can do to help
SCIENCE MATTERS by David Suzuki
Many environmental campaigns over the past 50 years have aimed at getting people to care for imperilled species in wild, far-off places. The focus in Canada has often been on large, photogenic, culturally important animals, with bonus points for campaigns that include alliteration, bumper sticker-friendly slogans and plush toys. This has been a sensible and often successful strategy.
Over the past few years, smaller charismatic critters closer to home have buzzed into the spotlight: bees. About a decade ago, beekeepers in Europe and North America started noticing serious declines in honeybee populations. Bees have lost much of their natural habitat to urbanization and industrial agriculture, and face increased stress from climate change-related drought and severe winters. These threats, coupled with the global spread of diseases and pests and a dramatic increase in the use of agricultural pesticides like neonicotinoids, have resulted in unprecedented losses for beekeepers. (Because bees and other insects provide ecological services like pollination, it makes no sense to declare war against all just to eliminate or control the few nuisances.)
The honeybee decline has been big news, partly because they make delicious honey, but more importantly because they’re pollinators. About three-quarters of flowering plants and more than a third of food crops worldwide depend on pollinators, from bees and butterflies to hummingbirds and bats. As a result, governments across the globe are developing strategies to protect them, including Ontario with its recently proposed Pollinator Health Action Plan.
Public attention in Canada has largely focused on domesticated European honeybees, but research indicates the honeybee crisis is part of a wider problem affecting hundreds of lesser-known but crucially important wild bee species.
Of about 800 wild bee species in Canada, more than 90 per cent have a “solitary” lifestyle rather than living in large, social colonies. Two-thirds of these are ground-nesters, including bumblebees, mining and digger bees that make nests in soil and under leaves and rocks. The rest are cavity-nesters like mason and carpenter bees that burrow in hollow stems, twigs and logs.
Although honeybees get the headlines and most of the credit for pollinating flowers and crops, studies show that wild bees can be two or three times better at pollination, and some, like mason bees, can be up to 80 times more effective.
The good news is that the honeybee crisis has galvanized interest in all pollinators, inspiring thousands of groups and citizens worldwide to establish new spaces for them — from wild bee hotels and rooftop honeybee hives to pollinator gardens in parks and schoolyards.
As our communities grow, pollinator habitat is fragmented into increasingly disconnected patches that disrupt natural pathways, making the potential of connected networks of habitat within cities especially fascinating. Oslo’s Bumblebee Highway, Seattle’s Pollinator Pathway and Hamilton’s Pollinator Paradise are all great local initiatives.
Establishing an urban pollinator corridor is also at the heart of the David Suzuki Foundation’s Homegrown National Park Project, which since 2013 has created more than 50 pollinator-friendly patches along the path of a creek now buried beneath Toronto — from small guerrilla plantings to a network of flower-filled canoe planters in schools, cafés, churches, parks and yards.
This spring, the Foundation will launch the Great Canadian Butterflyway Project to inspire bee-friendly urban innovations and neighbourhood-scale pollinator corridors across the country. Through videos, tips and other resources, the project will profile projects nationwide that are bringing nature home, one pollinator-friendly planting at a time.
You can become part of the growing movement to protect pollinators. Head to the library (or check out davidsuzuki.org/pollinators) to research the amazing diversity of wild bees and other pollinators in your community. While you’re there, learn what flowers and shrubs best support those species, and what might work in your yard or on your balcony. Then check out what local groups are up to.
Want to show wild bees some love? Create a sanctuary in your yard or garden by leaving a sunny patch of bare soil for ground-nesters. Add some pithy stems, sticks and wood debris for cavity-nesters. And be sure not to disturb the nests over winter.
Will the buzz generated by media stories and pun-filled campaigns save the bees? Only time will tell. In the meantime, we can all help by making bees welcome in our yards and neighbourhoods.
With contributions from Jode Roberts. Learn more at www.davidsuzuki.org.