Killer Fungi, Zombie Ants and Life and Death in the Rainforest

If a killer fungi that latches on to ant’s heads, releasing chemicals into their brains that make them go crazy and eventually killing them sounds like something out of a horror film, you’re in for a surprise. This seemingly harmless little fungi, known as Cordyceps, is probably an ant’s worst nightmare. It works by distributing its spores near carpenter ant colonies until until lands on the the head of an ant. Once it starts sprouting, its roots travel into the ant’s brain, releasing some interesting neurotoxic chemicals that alter the ant’s behavior, making them go somewhat insane. Eventually, the fungi makes the ant clamp its mandibles on a vein of a leaf, utterly immobilizing the ant until it dies. The most interesting phenomenon about this all is that when other ants realize that one of their men have been affected, they send a lonesome guy to kill the infected ant and carry him far away from the colony. Obviously, these ants know what this fungi means for them. It’s like something that comes out of a science-fiction book but one guide called it “cancer-like.” No one knows for sure how this fungi works but scientists say its related to LSD.

The 'killer' fungi that causes a sort of brain disease within ants, making them crazy and eventually killing them.

Fungi are probably one of the most important organisms in any ecosystem, yet they are constantly underestimated and understudied by scientists. Most people relate fungi with death and decaying, and their role does involve breaking apart dead, organic matter. However, I like to think of them as givers of life. In an awesome book about fungi called Demystifying Mushrooms (indeed by a hippy-looking fellow that just fell in love with these organisms), the author talks about how fungi are the natural recyclers of nature. They speed up the process by which other plants- trees, shrubs, and everything else that serves as the foundation of life-  can use this dead organic matter as nutrients to start new life. In this way, fungi is really at the beginning of the life cycle rather than at the end as most people see them. Even the above “ant-killers” of the rainforest are mearly transforming energy from ants back into the forest. So next time you eat a mushroom or see fungus growing somewhere, celebrate its role as a transformer and giver of life.. or just eat your damn mushroom, either way.

A Bridesmaid's Candle. This beautiful fungi lives for only 12 hours before returning back to the ground. It's really a treat getting to see one of these.

More cool fungi doing its job.


Foundations of the Forest: an introduction to what makes the rainforest go ’round

The Amazon rainforest encompasses more than a billion acres of land throughout Ecuador, Peru, Brazil and Columbia. The rainforest represents the most biodiverse place on the planet, with more species per hectare than anywhere else.

Unsurprisingly, it is rain that characterizes this ecosystem and the immense amount of rain that falls within the tropics can partly explain the incredible amount of life here. When I asked my assistant professor- who has spent his entire life in Ecuador and the majority of his adulthood in the rainforest- what his favorite part of the forest is, he responded without hesitation, “The rain. Without it, nothing would survive here. It’s the life of the forest.” The life of the forest really is the best way to describe the rain and when it rains here, it pours. Almost every night, the downfall of rain and its accompanying thunder and lightning woke me up with its intense power. One night, the rain caused a treefall right behind my cabin, which needless to say scared the living crap out of me. Spending a month in the rainforest during rainy season (now that’s saying something) in April, I learned to both love and hate the rain.

The dense jungle forest floor after a rainfall. Dejeanne Doublet

Water availability is important not only to species diversity but to the way plants function and structure themselves. Although, water is a blessing to these plants, it also poses an extreme challenge. With lots of rainfall comes runoff, meaning that nutrients are washed away from the soil, making rainforest soil some of most nutrient-poor in the world. Amazonian trees are no wimps, though, and they’ve evolved some really incredible ways to deal with this; the most apparent being their root systems. I never thought I would use the term “cool” to describe tree roots, but that’s exactly what I’m doing here. Trees such as Ceiba and Ficus trees use a buttress root system, basically meaning that they have immense and shallow roots that form wall-like structures. Locals call the structures that Ceiba tree roots form, “Casa de los Diablos” or “House of the Devil” and many indigenous groups consider these areas to carry strong and evil spirits. For me, they represent something totally different and I like to think of them as the strong and wise grandfathers of the forest (excuse me getting all Pocahontasy.)

A Ceiba tree aka "La Casa de Los Diablos." Dejeanne Doublet

The buttress roots of a Ficus tree. Dejeanne Doublet

Other trees like palms use stilt roots, which is a series of small, branch like structures originating from the bark outside of the soil and forming leg-like structures to keep the tree stable. My favorite example of this kind of tree is the Walking Palm, named after exactly what it does. Well, the Walking Palm doesn’t exactly walk, although indigenous tribes have all sorts of stories involving these trees uprooting and walking around the forest. They have a unique system of stilt roots that allow them to grow towards a desired direction. They simply begin growing more stilt roots on the side that they wish to travel and have been recorded to travel more than a meter within months.

Stilt roots. When a Walking Palm "decides" to move it simply grows roots on the side that it wants to travel. Dejeanne Doublet

Anyways, I talk about these trees and their roots because in reality they are the foundation of all other life in the rainforest. Most animals and insects live up in the canopies of trees and man of them never even step foot on soil. When walking through the rainforest, I was surprised by the lack of life other than trees. I admit, at first I was disappointed and eager to see wildlife. Over the course of the month, though, I realized it would take some tactic seeing this wildlife and eventually I did, making each siting so much more special. First of all, if you’re a walker and a talker, you’re probably not going to see much. Almost everything here is skittish and will scurry away as soon as they hear or see you. Secondly, there are two times of the day that animals are most active and that’s at dawn and at sunset. In between, you’re going to be looking for animals during nap-time and when they are eagerly looking for hiding places. With a little bit of luck and a lot of determination, you’ll see your fair share of wildlife. I was able to see a three-toed sloth, an agouti, capybaras, river dolphins (twice and once while swimming!), sea otters, nine species of monkeys, tortoises, snakes and other reptiles, and over a hundred species of birds while testing my hand in bird watching for the first time. While I wish I saw I jaguar or another cat, I only saw their prints. But to me, the secretiveness of these animals only adds to the mystery and adventure of the rainforest.

A squirrel monkey we spotted coming down to the salt lake. Dejeanne Doublet

A agouti taking a swim in the river. This is literally an extremely large rodent of the forest. Dejeanne Doublet

Fresh jaguar tracks in one of trails surrounding camp. It's estimated that a single jaguar takes up 10 acres of space but camera-traps around camp have caught up to a dozen jaguars in less than 10 acres of forest throughout the last 5 years. Dejeanne Doublet