Hidden effects of habitat restoration on the persistence of pollination networks (2022) Gaiarsa & Bascompte, Ecology Letters, https://doi.org/10.1111/ele.14081
Image credit: dronepicr, CC BY 2.0, via Wikimedia Commons
It’s no secret that the world is undergoing a biodiversity crisis. This comes not only from climate change and human land use, but also invasive species – non-native species that cause harm to native ecosystems. Specifically, there are seven times more invasive species now than there were 75 years ago. Because of how many there are, and just how fragile ecosystems have become, it’s important to know what effects that invasive species have.
Ecological restoration (see Did You Know?) is one effective solution that can be used to mitigate the biodiversity crisis. Reestablishing native species can often help with this restoration, as does removing invasive species, but it usually requires human intervention. By removing these invasive species, the idea is that the native species will be released from competition and benefit from better access to necessary resources.
Yet to monitor invasive species removal, you need long-term data on population persistence, which is very difficult (logistically and financially) to collect. Understanding how the removal of invasive species benefits restoration requires not only measuring how such removal benefits ecosystem function, but also how it can benefit population persistence in the long term. Today’s authors wanted to understand how the removal of an invasive species benefited local community resilience.
When we think of global warming, we tend to be a bit selfish and think of how it affects us in our daily lives, but the warming temperatures on our planet have the potential to affect the base of all of our food webs, plants (Image Credit: Matt Lavin, CC BY-SA 2.0).
Phenology in a warming world: differences between native and non-native plant species (2019) Zettlemoyer et al., Ecology Letters, https://dx.doi.org/10.1111/ele.13290
The timing of life-history events (such as births, growing seasons, or reproductive period) is called “phenology”, and this aspect of an organism’s life is particularly sensitive to climate change. So much so that changes in the phenology of certain processes are often used as an indicator of climate change and how it affects a given organism.
We’ve talked about the effects of rising temperatures in animals here on Ecology for the Masses, but there is a lot of evidence in the scientific literature for climate change causing a multitude of different changes in the phenology of various plants. Not only does the direction of the change differ (some organisms experience delays in certain events, others have earlier starts), but the size, or magnitude, of the change also differs. The authors of today’s study wanted to examine these changes in the context of an invasive plant species and how it may be able to outcompete a native plant.
Image Credit: Jorg Hempel, CC BY-SA 2.0
Can plant traits predict seed dispersal probability via red deer guts, fur, and hooves? (2019) Petersen and Bruun, Ecology and Evolution, https://doi.org/10.1002/ece3.5512
Large animals are key players in structuring both the physical structure and the species compositions of plant communities. They eat some plants, but not others, they trample vegetation, they deposit nutrients through feces. However, they can also affect plant communities by transporting seeds (a process called zoochory) – either by eating them and defecating later on or by acting as vehicles for seeds stuck in their fur or on their feet. As large plant eaters are found in most of the world, and several populations are actually increasing, a deeper insight into these processes could turn out to be of great importance.
Today’s authors (myself and former colleague Hans Henrik Bruun) looked at the transport of plant seeds by red deer in Denmark: whether the different kinds of seed dispersal are significantly different with regards to what species are transported, and if certain plant and seed traits can be used to predict whether a seed is more likely to be found on the outside or inside of a deer.
Kiftsgate Court Garden: The Wild Garden 1. An example of a “wild garden” in the UK, where the plants have been left to grow (Image Credit: Michael Garlick, CC BY-SA 2.0, Image Cropped)
How do you make your garden more biodiversity-friendly? During my time at the Futurum exhibition at The Big Challenge Science Festival, I spent a lot of time talking to people who expressed a desire to be manage their gardens for more plants and animals, but were unsure where to start. So I’ve compiled a brief guide on what to do, and it’s your lucky day – it involves not doing anything.
We sometimes ignore the effects of climate change on plant life, but the potential severity of these effects isn’t something that should be ignored for long (Image Credit: Pisauikan, Pixabay licence, Image Cropped)
From the California wildfires to the recent strikes across Australian primary schools, climate change is a topic that only seems to grow in its ubiquity. Yet whilst humans are increasingly focused on more obvious repercussions, such as extreme weather events, animal extinctions and shifting coastlines, we sometimes forget that climate change will have severe repercussions for plant life as well.
I spoke to Professor Johanna Schmitt of the University of California earlier this year to discuss some of those repercussions. Johanna’s team is working to determine how well certain plant species will be able to adapt in the face of rapid climate change.
The Asian Ladybeetle, which has now established itself in Norway and will likely be a permanent fixture in our ecosystem (Image Credit: Scott Bauer, US Department of Agriculture, Public Domain)
Reasons for deliberately introducing novel species vary, from their aesthetic appeal to a boost they may provide the economy with. Using them for biological control is another, and it has led to some of the world’s most infamous biological invasions. Today we look at the Asian Ladybeetle, which Norwegian farmers were keen on importing into the country to use to control pest species that were damaging local crops.