Tag Archives: Acacia

mutualisms and morphos

It seems fitting that my topic presentation is tomorrow because today we saw so many great example of plant insect interactions that I plan to discuss in my presentation! 

To start of the day, we set up pitfall traps around the forest to collect insects. We made one set of traps using our own pee as a source of Nitrogen to attract the bugs that are nutrient deficient. When Dr. Solomon first said we had to use our pee, I totally thought it was a joke, but no. We did in fact hide vials of our pee on trees and in the ground to observe how forest structure impacts nutrient limitation. 

On this hike, I saw another blue morpho, which I was able to get a (blurry) picture of. In real life, the butterfly is big, metallic, and majestic, but in the photo is more of a blue blur. 

Another cool thing we saw was lichen  growing with visible sporophytes. These little adorable contraptions allow the lichen to reproduce by releasing spores for the gametophytes. I’ve read about this process, but it was so cool to actually see it!

After lunch, we went out on a hunt for a colonized and uncolonized cecropia tree, as well as 6 herbivore insect generalist for our next project. Me, Serenity, and Claire immediately caught to katydids in the station and then we set out to find the rest.

We found our first cecropia tree pretty quickly, and we cut it down. Immediately, the ants that live inside of it began to swarm, defending they home and source of food. This symbiotic relationship is covered in my presentation tomorrow, so it will be a cool call back. Additionally, next to this tree, was an Acacia tree that also started swarming with ants once we disturbed it. This is the first of a few Acacia trees that we have seen, which is so exciting because this is another classic relationship that I will cover in upcoming presentation. As we searched for the uncolonized tree, we found a bug fig tree, where we discussed the fig tree and fig wasp relationship, where the wasp eggs are placed in the fig and develop within the fig— yet ANOTHER classic relationship that I will talk about tomorrow. Studying these relationships up close is so cool after learning about them for so long. 

Along our walk, we made many pitstops to try and catch some flighty insects. This was so fun for me. At this point, the weather was much nicer and we were essentially just wandering around trying to catch some useful bugs. We were trying to find two individuals in the same species of orthoptera, but instead we found and caught 4 different species of grasshoppers and one cricket. While this wasn’t what we wanted, it ended up working and it was a blast running around trying to catch them. I also caught a bunch of nymphs and adults of this red insect that we keep seeing hundreds of on all of our paths. I thought at first we could use them in our experiment, but I soon saw that they have haustellate mouths instead of mandibulate, which would be more ideal for our experiment. While we couldn’t definitively ID them, We think they were true bugs. I kept collecting them because I thought they were cool. I thought they were even cooler when they started fighting hunger games style, with the larger ones sucking the bug juices of the smaller ones. We kept them in a jar to see who is the final winner tomorrow. 

In addition to these bugs, I saw another Dirce beauty on the road, and I got a good picture and came so close to catching it! I don’t think butterfly catching is particularly my strong suite, but I still have hope. Maybe tomorrow will be the day.

Day 4: Into the Thick of It

IMG_0329Hi! We’re still in the heart of the jungle, on day 2/5 at Las Cuevas. Today was a busy day with us successfully setting up two research projects!

This morning we set up a research experiment using pitfall trap to try to see the nitrogen limitation between the forest canopy and ground by seeing the difference between invertebrates in the nitrogen (our pee surprise!) and the water pitfall traps. We spent the morning setting up the experiment on several trees.

In the afternoon we set up another research experiment to see if bullhorn acacia trees change their defense mechanism based on age and colonization of ants. Usually a Bullhorn Acacia tree has a mutualistic relationship with ants where the ants live inside the hollow tree and are provided food by the tree. In return the ants provide a protection to the tree from herbivores. We collected leaf samples from a young and old acacia tree and several different species of invertebrates from grasshoppers to crickets to katydids and put them inside with the leaves to measure change in biomass and monitor the insects health with close proximity to the plant.

Along our treks on the woods we observed several different cool species from a queen ant who had just mated her larvae in a young acacia tree to many different tarantulas. We also saw several beetles. Of note Sam found a Tiger Beetle which is really cool because those beetles are very fast!