Ep. 159: Mycorrhizal Ecology, Soil Biodiversity & Political Instability in South America (feat. Dr. César Marin)
Sep 3, 2023
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Dr. César Marin, researcher and academic in Chile, discusses the agency of fungi in symbiotic relationships with plants and the distribution of nutrients in plant networks. The podcast also explores the oldest tree in the world and its fungal associations, the connection between conifers and mycorrhizal fungi, drug decriminalization as a solution to the drug trade, the flaws of rationalism in science, and the fascinating impact of understanding fungal organisms on our perception of the world.
Different types of mycorrhizal fungi have varying degrees of symbiotic interactions with plants, influenced by factors like soil nutrient content and fungal diversity.
Research efforts are focused on documenting the presence and abundance of mycorrhizal fungi in various ecosystems, providing insights into ecosystem functioning and biodiversity conservation.
Utilizing mycorrhizal networks in ecological restoration projects has the potential to enhance plant growth, ecosystem recovery, and soil health.
Deep dives
The influence of mycorrhizal symbiosis on nutrient acquisition
Mycorrhizal symbiosis plays a crucial role in nutrient acquisition for plants. Different types of mycorrhizal fungi have varying degrees of symbiotic interactions with plants, with some plant species being highly dependent on these fungi for nutrient absorption. The degree of symbiosis can also vary depending on soil nutrient availability. While arbuscular mycorrhizal fungi are known to form a complete symbiotic relationship with certain plant species, other types of mycorrhizal fungi exhibit varying degrees of mutualism. The specific functions of these fungi, such as breaking down minerals and making nutrients available for plants, are influenced by factors like soil nutrient content and fungal diversity. Understanding the complexity of mycorrhizal symbiosis and its impact on nutrient acquisition can provide insights into plant ecology and potential strategies for sustainable food production.
The biodiversity and distribution of mycorrhizal fungi
The biodiversity and distribution of mycorrhizal fungi are important topics of research in the field of soil ecology. Scientists aim to identify and classify different species of mycorrhizal fungi, especially in South America, which harbors a significant portion of undiscovered fungal diversity. Research efforts are focused on documenting the presence and abundance of these fungi in various ecosystems, including tropical forests and grasslands. By understanding the distribution patterns and species composition of mycorrhizal fungi, researchers can gain valuable insights into ecosystem functioning, biodiversity conservation, and the potential impacts of environmental changes on these fungal networks.
The role of mycorrhizal fungi in ecosystem resilience and restoration
Mycorrhizal fungi play a vital role in ecosystem resilience and restoration. Studies are investigating the potential of using mycorrhizal fungi in ecological restoration projects. By utilizing fungal inoculums and promoting the establishment of mycorrhizal networks, researchers aim to enhance plant growth and ecosystem recovery in degraded areas. The interaction between mycorrhizal fungi and other soil organisms, such as bacteria, also holds promise for improving soil health and nutrient cycling. However, more research is needed to understand the effectiveness of these restoration strategies and their applicability across different ecosystems. By harnessing the potential of mycorrhizal networks, scientists are exploring innovative approaches to promote ecosystem resilience and restore degraded landscapes.
The Solace and Freedom of Being a Scientist
Being a scientist provides the speaker with the freedom to work on their own schedule, travel, and explore their interests. It serves as a mentally relaxing and fulfilling job, offering a sense of playfulness. The speaker finds that the challenges faced in science, such as rejection, pale in comparison to the violence and hardships experienced in their past. They have also formed strong friendships within the scientific community, considering them as almost family. Overall, being a scientist has provided solace and mental strength to cope with past traumas.
The Role of Science in Addressing Violence and Mental Health
The speaker believes that science can play a crucial role in addressing and mitigating the effects of violence, not only in Colombia but also in other parts of the world. They mention examples of scientists exploring areas previously controlled by armed groups and making important discoveries in Colombia. The speaker also emphasizes the importance of good psychotherapy and mental health research, as well as the need for better mental health treatment in post-conflict settings. They believe that science can inform policy decisions and contribute to building strong life projects for those affected by violence. Additionally, the speaker suggests that science communication and outreach can inspire and empower individuals to overcome difficult situations and pursue their passions.
Today on Mushroom Hour we are honored by the presence of Dr. César Marin – Researcher and Academic at the Center for Research and Innovation for Climate Change, School of Sciences, Santo Tomas University in Chile. Among his many accomplished roles, César has been a Postdoc at the Department of Mycorrhizal Symbioses, at the Czech Academy of Sciences, a Researcher at the Center of Applied Ecology and Sustainability of the Pontifical Catholic University of Chile, a Postdoctoral Researcher at the Institute of Agricultural and Veterinary Sciences of the University of O’Higgins and at the Department of Ecosystems and Environment, of the School of Agronomy and Forestry Engineering, Pontifical Catholic University of Chile AND Professor of “Soil, Ecosystems, and Global Change” at the Open University of Recoleta. Dr. Marin is the founder and lead of the South American Mycorrhizal Research Network, he is on the Board of Directors of the International Mycorrhiza Society, one of the initial members/Network laboratory of the Soil Biodiversity Observation Network (SoilBON), and a Research Associate of the Society for the Protection of Underground Networks (SPUN). He is currently Editor-in-Chief of the International Mycorrhiza Society Newsletter, on the Editorial Board of the Journal of Sustainable Agriculture and Environment and of the Evolutionary and Genomic Microbiology section, Scientific Adviser of FungiFest, and collaborator on Skype a Scientist.
TOPICS COVERED:
Mycorrhizal Ecology
Underground Nutrient Economy
The Oldest Tree in the World
How Mineral Availability Shapes Fungal Ecologies in Soil
Starting a Research Career in Chile
Emerging Mycology Research in South America
Undiscovered Biodiversity
Living with Political Violence in Colombia
How Science can Diffuse Violence and Contribute to Positive Social Change
South American Mycorrhizal Research Network
Protecting Land Based on Below-Ground Biodiversity
Fungal Allies & Adapting to a Changing Environment