A Model Approach to Weed Management

Post provided by VANESSA ADAMS

Vanessa Adams in the field with gamba grass in the Batchelor region, NT. ©Amy Kimber (NERP Northern Australia Hub)
Vanessa Adams in the field with gamba grass in the Batchelor region, NT.
©Amy Kimber (NERP Northern Australia Hub)

Invasive weeds cause environmental and economic harm around the world. Land managers bear a heavy responsibility for the control of infestations in what is often a time-consuming and costly battle.

Fortunately, an increasing number of research-based solutions are giving land managers an advantage. This includes tools to determine the distribution of weeds and also the development of modelling approaches to predict their spread.

Understanding the current and future distribution of an invasive species allows managers to better direct their limited resources. However, the direct and strategic management of weeds is tricky and that’s why population models (in particular spatial dispersal models that can be applied without much data) are needed to inform and facilitate action on the ground. Continue reading “A Model Approach to Weed Management”

International Women’s Day: Improvements Towards Gender Equality in STEM?

Yesterday we heard about the barriers to gender equality in STEM, as well as a few things that we’re surprised haven’t been fixed yet and some ideas on how improvements could be made. Today, we’re looking at where things are getting better.

What Changes, Initiatives, Actions etc. Have You Seen that have Impressed You?

Louise Johnson: One notable change for the better is that it’s now unacceptable to invite only men as your symposium speakers – it still happens, but you’d get deservedly yelled at for it. That kind of culture change seems inevitable, but it wouldn’t have happened without a lot of people sticking their necks out and complaining (and often being ignored or called whiny or jealous), so we should thank those people. I see more childcare grants available for conference attendance too, which is great.

Luísa Carvalheiro: Important steps I have seen in some countries are extending time limits to apply to fellowships based on the number of babies a woman has had, and to provide paid maternity leave for those financially dependent on scholar/fellowships. These are steps absolutely necessary in the real world. In an ideal world though, both men and women would have the same societal pressures and benefits. Continue reading “International Women’s Day: Improvements Towards Gender Equality in STEM?”

International Women’s Day: What are the Biggest Problems Facing Gender Equality in STEM?

In recent years, there has been an increasing focus on encouraging women to join STEM fields, but there is still work that needs to be done. We asked our female Associate Editors what the biggest problems facing the push towards gender equality within STEM fields today are. Here are their answers:

janaJana McPherson: My impression is that entering is not the issue. Certainly in my fields of conservation and ecology, there seem to be lots of women undergraduates and graduates and still a very decent proportion of female postdocs. I think it is beyond that level that women start to become increasingly rare. At least in part this likely reflects the fact that it is around post-doc time that biological clocks start ticking, and that it is neither easy nor necessarily desirable to combine starting and raising a family with a prolific production of publications, a heavy teaching load and the need to magic up a bustling research lab out of the blue. To reduce that hurdle, I think universities and academics have to become more accepting and accommodating of part-time effort. And I mean institutionally as well as individually. I have conducted research on a part-time basis for years now, and have seen many colleagues and collaborators in academia positively flummoxed by the concept that NOTHING (work-wise) gets done between when I leave the office on a Thursday at 2pm and when I return to work Monday morning. And yes, my life outside the office involves minutes and the odd hour here and there where I’m not directly interacting with my kids or looking after the household during which I could theoretically get the odd bit of work done. But I have tried that approach and found it rather stressful, sleep-depriving and frustrating for family members competing for my attention with whatever ‘quick’ piece of work I was trying to finish.  So now I leave work at the office and whatever does not get done within office hours just has to wait until I’m next at work, no matter how urgent.

Tamara Munkemuller2Tamara Münkemüller: I guess that the main problems are related to family planning. On the one hand, in many countries it takes long to get a permanent position and it feels like taking a risk to have children before this. On the other hand, one seemingly frequent constellation are couples of two scientists where the man is a bit older. In this situation it often happens that the older person gets a permanent position first and the younger follows and tries to adapt. Then there is the more subtle problem of different communication styles of men and women and numerous selection processes that tend to prefer a communication style that is thought to be more typical for men.

Satu Ramula: I think that one of the current challenges is to keep women in the system. Many female scientists leave academia at some point, which makes the sex ratio skewed as there are not enough qualified women to compete for academic positions at upper levels. Continue reading “International Women’s Day: What are the Biggest Problems Facing Gender Equality in STEM?”

There’s Madness in our Methods: Improving inference in ecology and evolution

Post provided by JARROD HADFIELD

Last week the Center for Open Science held a meeting with the aim of improving inference in ecology and evolution. The organisers (Tim Parker, Jessica Gurevitch & Shinichi Nakagawa) brought together the Editors-in-chief of many journals to try to build a consensus on how improvements could be made. I was brought in due to my interest in statistics and type I errors – be warned, my summary of the meeting is unlikely to be 100% objective.

True Positives and False Positives

The majority of findings in psychology and cancer biology cannot be replicated in repeat experiments. As evolutionary ecologists we might be tempted to dismiss this because psychology is often seen as a “soft science” that lacks rigour and cancer biologists are competitive and unscrupulous. Luckily, we as evolutionary biologists and ecologists have that perfect blend of intellect and integrity. This argument is wrong for an obvious reason and a not so obvious reason.

We tend to concentrate on significant findings, and with good reason: a true positive is usually more informative than a true negative. However, of all the published positives what fraction are true positives rather than false positives? The knee-jerk response to this question is 95%. However, the probability of a false positive (the significance threshold, alpha) is usually set to 0.05, and the probability of a true positive (the power, beta) in ecological studies is generally less than 0.5 for moderate sized effects. The probability that a published positive is true is therefore 0.5/(0.5+0.05) =91%. Not so bad. But, this assumes that the hypotheses and the null hypothesis are equally likely. If that were true, rejecting the null would give us very little information about the world (a single bit actually) and is unlikely to be published in a widely read journal. A hypothesis that had a plausibility of 1 in 25 prior to testing would, if true, be more informative, but then the true positive rate would be down to (1/25)*0.5/((1/25)*0.5+(24/25)*0.05) =29%. So we can see that high false positive rates aren’t always the result of sloppiness or misplaced ambition, but an inevitable consequence of doing interesting science with a rather lenient significance threshold. Continue reading “There’s Madness in our Methods: Improving inference in ecology and evolution”

Joint Species Distribution Models

Originally posted on Michael McCarthy's Research:
Update: The paper is now available (free) from Methods in Ecology and Evolution. Species might tend to occur together, or they might tend to occur apart. Factors driving these patterns can include environmental variables or species interactions. Species distribution models can predict the probability of occurrence of species, but they rarely account for the joint occurrence of multiple… Continue reading Joint Species Distribution Models

Altmetrics: how was the trial for you?

Last May we started a trial with Altmetric, using their tools to track the online presence of papers, e.g. on Twitter, blogs, and Facebook. Each paper gets an Altmetric score, which is updated as more data comes in. So, for example, this paper currently has a score of 42 (and boy will I be upset with myself if this blog post pushes it higher than … Continue reading Altmetrics: how was the trial for you?

Be nice to vandals, and they won’t be vandals?

Sometimes you read a paper and think “ooh, that’s cool”. As an editor you get the added delight that it’s a manuscript submitted to your journal, so you get to think “ooh, I really want to have that in the journal”. This is followed by “I hope it’s good enough”. At Methods we’ve just published one of those manuscripts where that was my reaction. And it was good enough.
Continue reading “Be nice to vandals, and they won’t be vandals?”

Our shiny new Impact Factor

Yesterday the ISI released their new impact factors: the second year we have been given one. And this year ours is 5.924 (that 4 at the end is vitally important. Vitally) This means we’re now 12th in the Ecology impact factor league tables (yes, Diversity and Distributions, we’re gunning for you next), and are still the highest BES journal. We have been asking those nice … Continue reading Our shiny new Impact Factor

Strangeness and simplicity in ecology

In Animal Ecology (1927), Charles Elton wrote that “while ecological work is fascinating to do, it is unbearably dull to read about.” It is reassuring that things were just as bad 86 years ago. Here, I want to think about why not all ecological work is unbearably dull to read about, and what this means for ecological methods. To my mind, the two things that … Continue reading Strangeness and simplicity in ecology

MEE’s top papers

Check out our newly updated top articles page, which shows MEE’s 10 most frequently downloaded papers, in August 2012. The top 5 are: A protocol for data exploration to avoid common statistical problems by Alain F. Zuur, Elena N. Ieno, Chris S. Elphick Biodiversity soup: metabarcoding of arthropods for rapid biodiversity assessment and biomonitoring by Douglas W. Yu, Yinqiu Ji, Brent C. Emerson, Xiaoyang Wang, … Continue reading MEE’s top papers