Sky Walk On Puente 3 (Bridge 3) In Monteverde, Costa Rica

Meet “the sheep of the Mesozoic,” Protoceratops andrewsi. This herbivore was a very common animal and is remarkably well-represented in the fossil record.

Preparing to return home

Mixed Feelings  

Looking forward

Experiences

I can’t believe that in less than two days, my semester abroad will be over and I’ll be headed back to the United States. At this point, there are things that I miss about the U.S. and I am looking forward to go back, but on the other hand, there are also things that I do not miss. Likewise, there are lots of things that I will miss about Costa Rica (food, host family, etc..) but there are also other things that I am ready to leave behind.  

I’m in the middle of my finals week and past the worst part. I’ve been ready to be done with classes for a while, especially after seeing friends from home finishing the semester a month ago. I am also ready to start my REU (like an internship for science students) that I have been figuring out the logistics of since mid-March. However, this means that I will be home for less than 24 hours before I leave (I live in South Central Pennsylvania and my REU is in Rhode Island), which means that I have barely any time to spend with my family and pets.  

I’ve had so many experiences abroad that I don’t even know where to begin to articulate them to family and friends. And you can only understand some of them if you were here to experience them for yourself. Throughout, I’ve gotten more comfortable with public transportation, which barely exists at home, and is one thing that I will miss but will be difficult to convey to my family since if we want to go somewhere at home, we just drive there ourselves. While it’s more convenient, it is also so nice to know that if you do a bit a research, you can get to just about anywhere in Costa Rica by bus. I’m also much more comfortable with Spanish after spending a little more than four months here.

In sum, I will miss Costa Rica and hope that I can come back in the not so distant future. I will miss my host family and friends.

It’s the biologists turn

Having recently shared images from the Nikon Small World (see http://bit.ly/2xQdOHd) and the Insight Astronomy Photographer of the Year 2017 awards (see http://bit.ly/2ipNvkn), here are some photos from the Royal Society of Biology’s 2017 Photographer of the Year and Young Photographer of the Year competitions in a week of the year that seems to have all these events announcing their honours more or less simultaneously.

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THE PARADOX OF THE PLANKTON EXPLAINED BY COMPUTER SIMULATION

The paradox of the plankton results from the clash between the observed diversity of plankton and the competitive exclusion principle, which states that, when two species compete for the same resource, ultimately only one will persist and the other will be driven to extinction. With phytoplankton this is different, despite the limited range of resources, as is light, nitrate, phosphate, silicic acid, iron, a large number of species coexist, all competing for the same sorts of resources.

Now, a new math model explains such biodiversity. To understand this paradox researchers created a conceptual model for a theoretical community. Where each member of that community consumes one type of resource, and consuming it causes the production of exactly two new resources. Also, any new member could only survive if there is an open niche, or if it was better to exploit a resource than a current member. But with this computer simulation, researchers discovered that its simple rules led to a virtual community that, like the bacterial or phytoplankton communities, this hypotethical community was diverse and stable, and in fact became increasingly stable to as organisms diversified.

Resource competition and metabolic commensalism -where one organism benefits from the other without affecting it- drive a healty and diverse ecosystem. Researchers demonstrate that even when supplied with just one resource, ecosystems can exhibit high diversity and increasing stability.  Despite early stages where massive die-offs scenes occured, as time passed and community grew more stable, these became less common. Affortunately to phytoplancton species, two communities under ideal conditions can develop so differently from one another, without producing extintions.

Photo:  Gordon T. Taylor.

Reference: Goyal and Maslov, 2018. Diversity, Stability, and Reproducibility in Stochastically Assembled Microbial Ecosystems, Physical Review Letters 

More on phytoplankton to come soon! Check out my first introductory post if you missed it.

Phytoplankton: An overview of the small, plant-like organisms that make the world go round. 

http://becausephytoplankton.blogspot.com/2017/11/what-are-phytoplankton.html?spref=tw

Image Credit: NASA/Goddard/Aqua/MODIS via Flickr

Phot by Jero Prieto

Alone in the world is a little catshark 🦈

This is one of the three deep-sea catshark species found in the Northeast Pacific, the longnose catshark, Apristurus kampae. They are found at depths ranging from 180 to 1,888 meters (590 to 6,500).

Catsharks are bottom feeders and are most active at night, often sleeping in groups during the day and hunting at night.

Dinoflagellates! These bizarre microorganisms are found all over the ocean, and occasionally freshwater lakes and ponds. Some are photosynthetic, some are predators, some are both! They are also the plankton responsible for toxic red tides. 

The first two pictures show Pyrocystis dinoflagellates.  These are closely related to the dinoflagellates that bioluminesce a bright blue along coastal waters. In the top picture, you can see a cell dividing its nucleus into two, as well as some sort of protective cyst in the lower right corner.

The 3rd picture is a bloom of Gymnodinium dinoflagellates, and the last picture is a close-up. See the nucleus?

More neat facts: some dinoflagellates have 215 billion base pairs in their genome. For comparison, the human genome is made up of about 3 billion base pairs! No one really knows why they have so much DNA, most of which is heavily modified and wrapped with re-purposed virus proteins. 

Baby loggerhead turtle at home in the sargassum in the Gulf Stream current, where it will spend roughly 5 years, finally being large enough that many animals won’t be able to eat! Sea Turtles have a very difficult life, most of which never make it to maturity and reproduce! Our own existence here on earth as a species is responsible for the death of many beautiful creatures including the sea Turtles, due to mistakes of the past! We have the knowledge, technology and some the drive to fix this, but will we make necessary changes to put our beautiful planet into a sustainable direction? I MOST DEFINITELY WILL! Please join me as our planets future and all creatures are dependent on it! Be the change the world needs! @jim_abernethy #beautiful #babyturtle #gorgeous #cute #precious #underwater #saveturtles #saveoceans (at Jim Abernethy’s Scuba Adventures & Marine Life Art Gallery)

With Stephen Hawking’s passing, today is a sad day for science. But amongst all his praise and achievements in the fields of physics, for me personally his biggest achievement was making a grand, full life despite the terrible misfortune of being diagnosed with ALS. It would have been easy to become a recluse, embittered with the hand he’d been dealt, a brilliant misanthrope. But this was a man who maintained his sense of humor and refused to be mentally beaten. Three years ago, he told One Direction fans that the theory of alternate universes could provide a reality where Zayn Malik was still in the band. He conducted an interview with John Oliver where his factual, deadpan delivery was funnier than his interviewer, managing the cheekiest grins as he did so. And let us not forget that Stephen Hawking is the only person to have ever portrayed themselves in a Star Trek episode (Next Generation, “Descent, Part 1″), where he appeared alongside actors portraying Einstein and Sir Isaac Newton, whom he proceeded to defeat in poker.

Hawking’s observations on black hole radiation, string theory, alternate universes and artificial intelligence are things that will probably forever remain beyond most of us. But we could all learn a thing or two from his humanity.