We are suckers for hype. The recent media sequel of the mythical Insect Armageddon and the coverage of the latest WWF report on wildlife declines are a reminder of this.
Global declines in insect populations are a huge concern. Insects contribute to myriad ecosystem services through a multitude of ecological processes and functions. If we lose insects, we WILL suffer. But the two studies media have hyped on this issue are not actually evidence that this happening. They are concerning; they are a wake-up call; they are worrying. But, in and of themselves, they are not evidence of apocalyptic declines in the number of all 1+ million species of insect on Earth.
Similarly, the recent WWF report does not show any evidence that humans have ‘wiped out’ 60% of all animals on Earth in the last 30/40 years, as many media outlets are claiming. The truth: the report considered around 4000 species of mammals, birds, fish, reptiles and amphibians…i.e. vertebrates. There are at least ~400,000 more species of vertebrate on Earth (depending who you talk to), probably more. And huge caveat!… Invertebrates are the most abundant and diverse group of animals, so any claim about ‘all animals’ that doesn’t include invertebrates is automatically dubious. Continue reading
Last year I wrote about the Insect Armageddon story – an important paper that received some exaggerated media hype.
A new paper just published in PNAS adds another twist to the insect declines saga…clearly, this story is far from over.
Lister & Garcia analysed data collected in the Luqillo Experimental Forest in Puerto Rico. This area of tropical rainforest is not a ‘pristine’ untouched wilderness, as some media reports are claiming – no place on Earth is untouched by humans! The site has been a long-term research location for decades, going back to the early 1900s, with a focus on experiments to understand the effects of disturbances of all kinds. Many important experimental research projects involving human disturbances (like this one) have happened in the Luqillo forest.
This study is important for a few reasons. Continue reading
Have you read a research paper where you experience this sequence of thoughts?: Title/Abstract/Introduction (wow! This is a real problem, someone’s finally answered this question), Methods (um, hang on, this sample size/study system/analysis approach doesn’t quite answer this problem…), Results (okay, these results are interesting, but…), Discussion (whoa, rein it in! I can’t find the link between these assumptions or recommendations and the results…).
The paper may be scientifically sound, as far as the methods & results go. The problem is that the authors have chosen a very broad frame narrative, and then confounded that frame with the interpretation of their results. Continue reading
Following on with the theme from my last post, here’s an article I wrote for the latest issue of the wonderful Wildlife Australia magazine.
Scale insects get a hard time. We usually think of them as pests, based on our experience with them in gardens and farms. But if a scale insect is living on a tree in the middle of a forest far from any human community, is it a pest? Or part of a complex web of interactions? Every living thing contributes to ecosystem function somehow and there are lots of interesting interactions that we overlook by focusing on simplistic labels.
Click on the image below to read the article.
© Manu Saunders 2018
I loved this recent blog by Staffan Lindgren. I followed a very non-linear path to my current position and I’ve been struggling a lot lately with defining my research specialisation.
In high school, I failed chemistry, barely scraped through physics and maths, didn’t study biology, excelled at English, geography and history. I loved nature and being outdoors, but didn’t know there was a science career in that. So I went off to uni and did a Humanities degree (which I thoroughly enjoyed) and spent my early 20s trying out corporate communications, office admin, media, governessing on a remote cattle station, but nothing stuck. By this time, I’d discovered that science wasn’t all about lab coats and test tubes, so I went back to uni to study environmental science.
I didn’t plan to pursue a research career – I nearly failed undergrad statistics and never fit the norm of the ‘successful scientist’ promoted within the academic community. For my Honours year, I followed the well-worn path to vertebrate ecology, but had to switch projects halfway through the year because my supervisor disappeared on his own remote field work for the rest of the year without telling me. The only available project I could feasibly do in the 4 months left of my degree was monitoring a tingid biocontrol agent on its host, an invasive environmental weed. An insect career wasn’t even on my radar then, but that’s when I discovered how much I liked insect ecology. After two false starts at a PhD, I finally found a supervisor and project combination that clicked and the rest is history.
So it’s comforting to read of winding roads that have led others to long and inspiring science careers. Fingers crossed! Continue reading
The argument that half our planet should be set aside for Nature has been in the news lately. A few years’ ago, E.O. Wilson wrote Half-Earth, his plan to save the biosphere by dedicating half the planet’s surface to nature. Other scientists have published supporting arguments, for example here and here.
The idea is commendable and inspiring. Modern human civilisation is having huge, sometimes irreversible, effects on natural processes and ecosystem function. In return, the outcomes of these effects are having terrible impacts on human wellbeing, e.g. climate change, loss of natural vegetation, plastic and agrichemical pollution etc.
To sustain life, we (all of us) really need to change the way we use our local and global environments.
So is the ‘half earth’ proposal realistic and effective for achieving this goal? Continue reading