SciPod

Humans have driven dramatic environmental changes – most of which have a negative impact on us and other species. Today, we can only understand ecological systems by integrating the impacts of human activities, driven by our social systems. These social-ecological systems are dynamic, consisting of feedback loops and several interacting sub-systems – such as forests and agricultural production. The resilience of these systems is dependent on diversity – be it ecological or social. Beyond a certain point, a sub-system may cross a tipping point that changes the state of the whole system, potentially irreversibly, ushering in a new social-ecological state, which is typically less favourable than the former state. In recent research, an international team of experts has developed an advanced analytical framework to examine the tipping points within the social-ecological multiverse of the Southwestern Amazon.

In their recent research, Anne Summach, Titus Chan and Tammy O’Rourke at the University of Alberta explore the factors that determine healthy ageing and frailty in seniors. They formulate and test a new index for assessing strengths and deficits in individuals to create targeted interventions.

In a recent paper, Professor Bertrand Guillotin and Julianne Sellin of Temple University discuss the difficult decision demanded of international companies operating in Russia at the beginning of the Ukrainian invasion. They explore this using the case study of Auchan, an international grocery retailer that had invested huge amounts of resources into the Russian market and had a tough decision to make.

Plastic pollution is accelerating the destruction of our planet. Discarded plastic can be found in the remotest areas – from the highest mountain tops to the deepest ocean trenches. As many types of plastic take hundreds of years to break down, finding better solutions to the plastic crisis is vital. In recent research, Dr Jay Mellies from Reed College in Oregon examines the ability of microbes to break down mixed-plastic waste.

Both the frequency and intensity of droughts are forecast to increase in climate change predictions. It is well established that plant communities are sensitive to drought conditions, having implications for agriculture, forestry, and wild habitats. Despite the close association between soil fungi and plants, our understanding of how fungal communities respond to drought remains incomplete. To build this understanding, Dr Ari Jumpponen and his colleagues at Kansas State University used a combination of pure culture- and DNA-based techniques to study soil fungal communities exposed to chronic drought conditions.

The idea that human beings have souls that leave their body after death is an essential part of most religions and spiritual beliefs. However, this has been very difficult to prove scientifically. Benjamin Scherlag, Ronald Scherlag, Tarun Dasari and Sunny Po at the University of Oklahoma Health Science Centre recently investigated the existence of a soul by conducting a series of scientific studies. They carried out these experiments on a dwarf form of the organism Stentor coeruleus, which is known for its regenerative abilities.

As they age, steel and concrete structures often need to be retrofitted. One such way of strengthening is with Carbon Fibre Reinforced Polymer – or ‘CFRP’ – laminates. For certain applications, however, this can be a difficult and time-consuming process, and the resulting laminates are prone to debonding. In his research, Dr Abheetha Peiris at the University of Kentucky developed a new type of strengthening in the form of CFRP strip and rod panels. The panels can slot together seamlessly – making them less prone to failure, and far easier to assemble. Through a series of experiments and field applications, he revealed how the new method can be applied for retrofitting both steel and concrete structures.

Before an infant can learn the link between a word and an object by following a pointing gesture, Professor Nancy Rader’s team has found that infants can learn this association through ‘show gestures’. Show gestures entail bringing an object towards the child and rotating it, while synchronizing the movements with speech. While the effect of show gestures decreases with age during childhood, Rader and her colleagues have found that non-verbal children on the autism spectrum are very sensitive to this information, performing as well in learning words as age-matched typically-developing children.

Satellites are vital to modern civilization, powering the GPS in our phones, enabling long-range communication, and giving us insights into Earth’s climate and the universe beyond. We now launch thousands of new satellites into space each year, dramatically increasing the risk of collisions. Such satellite collisions create debris that can damage more satellites. Thomas Kleinig and his colleagues are developing and testing a new approach to avoid collisions by exploiting a unique property of the thin atmosphere that satellites travel through.

In a recent paper, Professor Radu Mares of Lund University in Sweden examines the UN’s recent efforts to create an international treaty for addressing human rights violations involving transnational corporations. He explores the history and context of this work and interrogates its effectiveness.