Agreed, bees and other insect pollinators are under threat globally from multiple human pressures. If pollinators disappear completely from an ecosystem, their loss will affect the structure of those ecosystems and the natural foods and fibres we use from the ecosystem. So, finding solutions to the problem of pollinator decline are imperative.
This is why the robo bees story sounds like such a seductive idea. Imagine creating tiny drones with hairs on them that can be programmed to do a bee’s job? Wow! We are off the hook. Continue reading
All good things come to an end. 2016 was a year just like any other; some dreadful things happened and some wonderful things happened, depending on who you talk to.
For people interested in sustainable agriculture, it was a pretty exciting year. But in keeping with the annual theme of misinformation, there were also plenty of fails. Here are some of the highlights for me: Continue reading
This is a guest post from my PhD student Rebecca Peisley, who I am co-supervising with Prof Gary Luck. Rebecca will submit her thesis early next year. She has been working on a really cool project looking at the costs and benefits of bird activity in apple orchards, vineyards and cattle grazing systems across south-eastern Australia; this blog is about her work in apple orchards.
Birds are commonly found in agroecosystems around the world and their foraging activities within crops can result in positive or negative outcomes for producers. For example, birds can help increase saleable yields by preying on insect pests that damage fruit, or removing leftover fruit after harvest, which helps prevent disease and assists in nutrient cycling. However, birds can also contribute to production losses by eating and damaging fruit before harvest, or preying on beneficial insect pollinators.
We cannot then assume that birds are simply ‘good’ or ‘bad’: the same species can in fact be ‘both’. But in our literature review, we showed that most studies of birds in agroecosystems have just considered either costs or benefits separately, which limits our understanding of how birds influence crop yields over spatial and temporal contexts.
In order then to gauge an overall outcome of bird activity, we look at both their beneficial and detrimental activities together in the same crop system and consider the trade-offs that exist between them. For example, the beneficial activity of insectivorous birds preying on pest insects in an apple orchard and reducing insect damage to fruit is traded off against the detrimental activity of the same birds preying on beneficial pollinators resulting in reduced fruit-set. Continue reading
Two long-term studies were published today showing comprehensive evidence that neonicotinoid use could have long-term effects on populations of non-target insects, especially wild pollinators. The studies look at wild bees in the UK and butterflies in California.
I wrote a piece for The Conversation on why I think these studies are important and how these results relate to Australia.
Read more: Neonicotinoids linked to wild bee and butterfly declines in Europe and US
Also see Jeff Ollerton’s great post on the UK bee study: Bees and pesticides – a major new study just published
© Manu Saunders 2016
If you believe your Twitter feed, every Jack and his beanstalk has the quick-fix solution we need to beat the sustainable food challenge. ‘If you want to eat meat, switch to pigs, birds & fish to generate fewer emissions’. That’s convenient, because ‘lettuce is three times worse than bacon for the environment’.
These solutions all sound pretty sexy. But reducing the environmental impact of food production is not as simple as choosing one crop or livestock type over another.
Food production is a social-ecological system. That means it’s a system based on a mutual relationship between nature and humans. The ecosystem (i.e. the farm) influences human lives and actions, via ecosystem services. And humans influence the ecosystem’s structure and function, through direct management and indirect drivers like regulations, subsidies, financial markets and consumer demand. Continue reading
It’s hard to keep wild animals out of farms. Birds, mammals and insects all affect crop yields, in positive ways (such as flies pollinating flowers) and negative ones (such as when birds damage fruit).
Agricultural research and management programs often deal with these interactions by focusing on simplistic “good” and “bad” labels: aphids are annoying pests, for example, whereas bees are little angels.
Read the rest of our piece at The Conversation.
And see the papers behind the article here:
Saunders ME, Peisley RK, Rader R, Luck GW (2016) Pollinators, pests, and predators: Recognizing ecological trade-offs in agroecosystems. AMBIO 45:4-14.
Peisley RK, Saunders ME, Luck GW (2015) A systematic review of the benefits and costs of bird and insect activity in agroecosystems. Springer Science Reviews 3:113-125.
Every year, I get to share my birthday with these guys:
I’ve been mildly obsessed with both of them for years, for obvious reasons. But it was only recently that I discovered their early contributions to the land-sharing/land-sparing debate, something directly relevant to my own work. Darwin’s ecological legacy is well-known, but how often do we consider Lincoln’s impact on environmental history? Continue reading