Tag Archives: Hard Corals

reflections on our adventure

The past two weeks have felt like some of the longest days of my life, but I can not believe that BIOS 319 is over already. It was truly amazing to experience nature in these tropical environments in full force. I had never been so south before, so it was interesting to witness the latitudinal diversity gradient up close. The biodiversity that we observed in the field was unrivaled by anything I had seen before. The combination of intense, somewhat regular tropical sunlight and abundant rainfall has cultivated impressive biodiversity in both the reef and forest ecosystems. Further, the similarities in both ecosystems also stem from their biogeohistory. The bedrock of the forest is mostly limestone, making the soil pretty nutrient-poor, and leading to a variety of ecosystem adaptations to account for this. We saw the soil horizon on our drive to the forest, and there wasn’t much topsoil. We saw the buttress roots of trees that couldn’t go any deeper because of the bedrock, and we learned about different methods of quick nutrient cycling in the forest, like through nitrogen-fixing epiphytes. This is connected to the reef. With my taxon being hard corals, it was really interesting to learn about the calcium carbonate skeletons that hard corals create, and then to see them as calcified fossils in the coral graveyard. It’s amazing to think how these calcified fossils are what led to the limestone bedrock over millions of years. We also saw methods of quick nutrient cycling in the reef, like the constant feeding and pooping of the parrotfish. In contrast, we also learned and saw a lot of differences between the two ecosystems. For one, the weather it was so windy on the atoll, but in the forest, there was just heat without a breeze. Because of this, I think the days in the forest seemed much longer than the ones on the atoll. While I would’ve expected to experience more bugs in the forest, they actually weren’t as much of a problem compared to the atoll. In the forest, my biggest issues with bugs were huge insects like cockroaches and katydids wanting to spontaneously fly at my face or join me in the shower, but I never got bitten. On the other hand, in the atoll, our insect problem was sandflies. They are so tiny that you can hardly see them, but boy, do they bite. Just a few minutes in the sand around sunset, and I would have dozens of bites.

I honestly thought that living “off the grid” would be more challenging for me, but it wasn’t too bad. The limited access to technology didn’t bother me as much as I had anticipated, and I actually enjoyed the break from screens. I knew that I would be dirty, but oh my gosh, I couldn’t have anticipated how filthy I would be every day. I never felt truly clean while on the trip, so the first shower when I got home really hit.

Overall, my favorite thing about the trip was the ATM cave. I love seeing how biology, geology, and history interact with each other in these caves. I definitely think I could have spent hours exploring the cave, and it was so interesting to hear from our tour guide, who specializes in studying Belize caves. Especially because my family is descended from the Maya, it was really interesting to hear about their culture and relationship with the environment. I think it is so cool how they thought caves were doors to the underworld and worshipped and made sacrifices to the rain and corn gods there.

My least favorite thing was definitely when we had to go off the trail to place our camera traps. The first few times were fun, but after a while, the heat started to get to be and I felt drenched in sweat and I was nervous the whole time that a snake would pop out, out of nowhere.

I definitely learned a lot on this trip, but the three most important things were:

  1. How coral polyps function as a colony and almost like one giant organism.
  2. How plant and insect species coevolve together over millions of years to become extremely specialized and depend on one another.
  3. Even a small pilot study with a limited sample size can help guide further studies in the right direction and offer some insight into general trends.

5/30- the Journey back home

This morning, I finally woke up early enough to watch the sunrise on this beautiful island. We left at 6 am so I tried to spend my morning committing everything to memory, from the way the crabs scurry in the sand to salty sea breeze. I feel very lucky that I am not someone that gets seasick because the 3 hour boat ride was extremely choppy and made some of my classmates sick. For me the ride is so peaceful— I put my headphones in and sunglasses on, and I fell asleep. We got our first taste of AC on the bus ride and it was heavenly. After the flight and getting through customs, I said my goodbyes to the group and left for a plane back home. I was so excited to be home and see my family, I took the longest shower ever and fell into the deepest sleep of my life. This trip definitely felt like way more than two weeks long.

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5/29- Leaving it better than we found it

Like two days ago when we explored the coral graveyard, we noticed how polluted the shores of this island is. We all wanted to leave the island a little better than we found it, so today, we spent the morning cleaning up the beach. We had 7 huge trash bags and we filled them up so quickly. We could have spent days collecting all of that trash, because in just about an hour, we filled up all the trash bags we had. As we picked up trash, we collected data on where the trash tended to be most dense on the island. We found that on different sides of the island, the amount of trash was similar, but the distribution was different. On the edge of the atoll, the collected trash was more concentrated in one area, while on the iside of the atoll, the trash was much more spread out due to thte currents.

Then, in the afternoon,  we dissected some lionfish. Lionfish are invasive to this area, and a huge threat to coral reefs, so our professors have been spearing them throughout the week. My llionshidh was very small, so there was nothing in its stomach, and I couldn’t tell the sex. However, it was still interesting to examine the gills and anatomy.

In the evening, we had an optional last snorkel, so obviously, I had to go. Swimming and snorkelling has been my favorite thing to do on the island, and I loved being able to explore the beautiful reefs one last time. I saw so many maze corals, fire corals, and finger corals. I also saw a nurse shark, sting ray, and lion fish.

5/28- Marine Protected Areas

Up until today, we had only explored reefs in marine protected areas. But today, our project centered around how biodiversity is impacted by MPA status. We visited two non-MPA and two MPA reefs. There was an obvious difference between them. The non-MPA reef had fewer fish, and they seemed more wary of human presence than the fish in the MPA. We just learned about MPAs last night from a representative from the research station, a marine biologist, and a member of the Coast Guard. These people together protect the precious ecosystems here, and it’s cool to see how their efforts have a tangible impact on these endangered habitats. Besides this, we had some downtime today to just soak up the sun on the pier. We leave soon, so I’m trying to enjoy every moment.

This is me when I had to jump in to retrieve my sandal.

5/27- Exploring a graveyard

After spending the past few days mostly in the ocean, it was nice to spend today doing some non-snorkeling activities.  We waded in the shallow parts around the dock, just trying to catch anything and everything we could. Our coolest and scariest find was definitely a box jellyfish, which has one of the worst stings. Somehow, no one got stung, and Elise caught it! It’s crazy how something so unassuming can be so powerful. 

We also walked to the coral graveyard. The whole island is covered in fossilized corals, but this part is a particularly large mound of them that has built up over a long period of time. These calcium carbonate fossils are still in very distinct shapes, so you can kind of tell what species they are. I saw elkhorn, staghorn, finger coral, lots of brain corals, maze coral, mound corals, and others that I couldn’t even identify. Hard corals secrete calcium carbonate to make a skeleton, which builds the coral reefs. This process has been happening for billions of years, and when they day, they become fossilized and eventually get compressed into limestone, which we see as the predominant bedrock of many areas in the Belize forests. It’s this limestone that led to the formation of the giant cave structures that we explored. The geological time is incomprehensible to me, and it’s amazing how it is all connected.

At night, we all went to the dock and shined light into the ocean to watch sea creatures. We found a really cool squid, which we caught, watched ink, and messed with it to see it change colors. This was so fun, but I wish it had jumped out at us, which is apparently one of their defensive mechanisms.

5/26 Hunting for Parrotfish

I spent the day with my dive buddy Claire today looking for redband parrotfish. We tried to follow them around the reef for a survey on parrotfish diets. At the first site, we didn’t see any. We thought we had found some, but when we got to shore I realized that all I had were videos of wrasses. At the next two sites, we actually did spot a few! Parrotfish are difficult to spot because the same species can look completely different, so it was definitely a challenge. We ended up finding 6 total, but we only saw the two females eat because the males typically patrol and don’t eat as much. On our parrotfish hunt, I also noticed so many christmas tree worms living on brain corals. These guys are so cute!!! If I were to send a wave vibration towards them, they would sense it and shrivel up immediately. Likewise, we played with some sea anemones, who would also shrink up when u got close to them. It was adorable! I also got to see some yellow pencil coral and lettuce coral here!!! The lettuce coral was much smaller than the pictures I have seen. It seemed to grow in small patches around the reef, so I hadn’t noticed it before.

5/24 Paradise???

We have finally arrived at glover’s! Most of the day was spent traveling, which was a much needed rest after our week of activities. We took a 3 hour, windy, sunny, beautiful boat ride. It was so cool to pass by islands and see the start of the laguna and the atoll. The barrier reef made the waters really choppy at some times, which made the ride extra fun. I can’t wait to see those corals up close in person tomorrow!!! When we got here, we hung out on the dock for a long time because it was so gorgeous and peaceful. The weather is a hige upgrade from Chiquibul, because there is a lovely salty breeze, and even fans in the rooms! The main issue is the SAND FLIES EVERYWHERE. I already have so many bites. Now i know to avoid the sand as much as i can and where a jacket and bug spray. After just being here for a few hours, we have already seen so much life including pelicans, a nurse shark, bone fish, and more ginormous crabs than I have ever seen in my life. Tomorrow morning is our first snorkel! I’m really looking forward to getting the hang of snorkeling in the reef.

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Hooray! My first blog!

Hello! My name is Dyllan, and I’m a rising junior at Jones! I’m double majoring in Environmental Science (EEB) and Social Policy Analysis. I am writing this blog right before I leave for my flight to Houston, and I couldn’t be more excited!

Ever since I was young, one of my biggest dreams has been to study a prominent coral reef up close before coral bleaching destroys these beautiful ecosystems. My reef taxon is hard corals, and I have really enjoyed researching and learning more about them. I’m really looking forward to seeing them up close. I expect to grow my interest and passion for protecting these environments even more.

I have prepared for the trip by making sure I complete my homework before the trip. Our class meeting to practice snorkeling was very helpful because I don’t have much experience. A few days ago, I practiced again on my own in the pool. The hardest part is the pain in my ears.

I hope to learn about how to study ecosystems without intruding and disrupting the natural environments. I want to learn field study techniques that respect nature because I hope to apply these skills to my future studies.

I am most nervous about being tired or sunsick. I packed lots of protein bars and liquid IV packets to prepare for this. Even though I am nervous about the physical activity and early mornings, I am also very excited because I think it will get me into shape lol. The backpack I brought comes with a water bladder to make staying hydrated easier, too.

I am the most excited about seeing the Mayan ruins and ancient Mayan forests. I’ve learned a lot about the natural history of these forests, and I think it is fascinating how ancient Mayan sustainable agriculture can still be observed in these wild forests. The Maya were able to cultivate biodiversity that has lasted to this day, and I think their relationship with nature is something we should learn from.

I don’t really have any experience in the tropics and the only fieldwork I have done was in BIOS 213, so I am excited to gain this experience.

See everyone soon!

 

Truly an Experience of a Lifetime

Sadly, we have neither a reef nor a rainforest back home in New Mexico. Hot showers and a washing machine are nice, but I would rather be back at Glover’s and LCRS. This class was an incredible and once-in-a-lifetime opportunity to explore two of the most diverse regions in the world, both of which were contained in the small country of Belize. The tropics have an unmatched level of macroscopic diversity, and it was amazing to witness this firsthand. Every time I looked in a crack and crevice, high up in the trees, beneath chunks of coral rubble, under logs and leaf litter, there was always interesting life hiding in plain sight. It was truly unlike anything I have ever experienced.

Our lectures and discussions addressed a multitude of factors that ultimately drive this immense diversity of the neotropics. And although the ocean and rainforest seem to be two different extremes of dissimilar environments, surf and turf have several similarities. One similarity that is present in both environments, yet seems counterintuitive is the fact both a reef and a rainforest are essentially nutrient desserts. Both ocean water and forest soil contain low levels of biologically relevant nutrients, and as a result, organisms have developed creative and sometimes symbiotic/mutualistic strategies to thrive in these nutrient-poor environments. The cycle of nutrients is critical in both of these environments, and unfortunately, both of these regions (and in particular my two taxons: stony corals and amphibians) are particularly sensitive to anthropogenic changes. Both of these regions rely on a high level of constancy to thrive. Corals stressed from temperature increases, eutrophication, heavy metal contamination, ocean acidification, and more, are far more vulnerable to disease and degradation. And amphibian populations have seen significant decreases both because of direct absorption of harmful pollutants through their porous skin and the disruptions of the once incredibly predictable weather patterns that their breeding behavior relies on. So sadly, both these regions are particularly vulnerable to human-driven climate change. Yet, both the rainforest and reef are significant contributors/drivers of the global economy. Humans are incredibly reliant on these ecosystems for resources and protection, and our preservation and coexistence with them is critical for the prosperity of us all. Belize has an incredible amount of untouched forest, and to see the contrast between the Belizean hills covered in forest and the decimated ones across the border in Guatemala which were cleared for slash and burn agriculture was alarming.

I was able to interact with many endangered and rare species, and I would say this would be the most memorable part of the course for me. I will never forget the Morelet’s Tree Frog which jumped on my face or finding small hopeful patches of Acropora cervicornis scattered throughout some of the reefs. It’s sad to think why these regions are experiencing such a rapid decline in diversity and population, yet this hands-on experience has further strengthened my love for biology and possibly shifted my future career away from medicine and towards research.

The list of things I learned in this course could go on for pages yet three that come to mind are:

  1. Mutualism/symbiosis is everywhere in these environments and the connections and balance between organisms are unimaginably complex. This also leaves them quite vulnerable to human exploitation, climate change, and invasive species.
  2. The global economy is heavily reliant on these regions in multiple capacities, and the loss of rainforest and reef diversity is not just a loss of cool organisms, but sets in motion cascading instabilities throughout the world both ecologically and economically.
  3. And field research is a whole different animal compared to laboratory work. Things rarely go as planned and it’s critical to be adaptable and flexible. (Also plan to pack light because everything you bring back is wet and heavy haha)

I am truly thankful for this experience and I hope it is not my last time exploring the tropics. I couldn’t have asked for a better group of TFBs and I hope to see you all again soon!

~Rusty

Day 7: Predator Turned Prey

From our last snorkel to lionfish ceviche, today was a great day overall. We started off by heading to our final patch reef to finish collecting data on the relationship between coral cover and sea urchin abundance. The wind and waves were strong, but overall, it was a fairly smooth experience. However, the boat ride was more akin to a rollercoaster. The relationship between urchins and live coral was an interesting concept to investigate. Our data reliability may be a bit questionable (as we are far from experienced in this type of research) but the patch reefs we visited all had significant growth of brown algae, which colonizes the dead stony coral skeletons along with a multitude of other organisms. The battle between stony corals and macroalgae is constant, yet it’s clear that human-driven environmental factors have swayed many reef regions in favor of more prolific algae growth at the detriment of stony reef builders. In theory, this may bolster the local urchin population because of an increase in available algal food.

That doesn’t mean these reefs aren’t teeming with life though. I was able to see several colonies of Orbicella faveolata (some with small fish resting on the surface), tons of Porites, and even several Caribbean reef squids.

We ended the night by dissecting the invasive lionfish we caught over the past few days and then turning them into ceviche. A tasty snack to end a wonderful time on the island. I look forward to the forest, and hopefully the opportunity to spot an amphibian or two.

Collected urchins
Porites sp. (hard to tell)
Orbicella faveolata