Friday, April 30, 2010
This trip was one of the best experiences of my life. Thank you all for making it a memorable time. This picture was obviously taken when we had our fire on the beach the last night...before it was destroyed by the incoming tide and the random truck trying to get down the beach. I thought it was still a pretty fun night overall.
Cape Hattaras light house and Pea Island was one of my favorite day trips. I loved getting to see the dolphins playing off the shore and seeing the light house. I also loved collecting things on the beach by the light house as well. Throughout the whole trip I found several interesting things. I had a lot of fun.
Here are just a few of the cool things I saw in the Outer Banks:
Even 15-foot-tall sand dunes are futile attempts to prevent the erosion that barrier islands experience naturally.
We went kayaking in a salt marsh and I spotted a duck. I was able to get close enough to take this sweet pic right as it took off.
The Littoraria snails will climb the Spartina marsh grass to escape predation by crabs below. They can hold on even as they sleep by secreting a sticky substance onto the spot and just hang there, sleeping.
We came across this huge fish skeleton in the salt marsh. I took a picture with my hand next to it to set the scale for how huge this thing was. We wanted such a complete specimen for our lab back in Ohio, so we wrapped it in trash bags and stored it in our lunchmeat cooler.
Once you get the chance, go check out the Outer Banks! But whatever you do, don’t feed the Laughing gulls! They will stalk you forever if you do.
Thursday, April 29, 2010
I was partially right. They can swim away from the spill, and their skin allows the oil to just run off them as they swim so it doesn’t cause any permanent harm.
However, they do need to breathe sometime. When they come up to the surface, if they happen to take in oil in their mouths or blowhole, it can cause serious damage to their airways, mucous membranes, or digestive tract (like a poison). Oil can also cause eye damage if it gets in their eyes.
Things only get worse from there because panicking or stressed dolphins will surface more often because they are breathing harder and need to breathe more often, which will expose them to more oil floating on the surface.
Wednesday, April 28, 2010
Tuesday, April 27, 2010
The aquarium was very fun to walk around and enjoy. Despite the massive crowd, I was able to touch the manta rays. They had an interesting feel to them (soft, squishy). It was enjoyable, as I had not touched a manta ray since the old Sea World tanks.
I had a great trip, hope you all did too.
Learning about hydrothermal vents in class piqued my interest and when I came across this news article I was especially interested. They have found a very deep vent in the Cayman Trough in the Caribbean; this vent being the deepest known hydrothermal vent. This vent is 3 miles below the ocean surface. The article called these vents black-smoker vents because of the dark color of the water and other substances being forced out of the vents.
Now that researchers have located this vent, they plan to characterize the organisms that are living there and compare them to the organisms which are living near vents that are not so deep. They also want to study the chemicals and minerals that are being released into the water by this and other vents. Hopefully there will be more information to come about this vent. This article was just introducing the fact that researchers have discovered a vent deeper than any other previously discovered vent. Very interesting research.
Monday, April 26, 2010
Drilling for oil can be a complicated procedure. First, you have to find oil and then you have to drill to get it out of the ground. Before, during, or after drilling for oil, oil spills may occur. Oil spills can have massive affects on the surrounding environment as well as decreasing the profit for companies. In order to help save the environment and make more money, a company called Biota Guard is utilizing the blue mussel. The blue mussel, Mytilus edulis is being used to help alert oil companies to oil spills. The mussel has been observed to react differently to different pollutants such as oil spills. The reaction of the blue mussel along with other mechanical sensing equipment can be used to help identify and stop oil leaks as soon as possible. After learning about M. edulis in class I thought this was an interesting article to read and was excited to see it being used by humans to help protect the environment. The article can be found at http://www.sciencedaily.com/releases/2010/04/100423210008.htm
Sea lice have been a big problem in the ocean lately. The sea lice have had a major impact on important fishing industries and have become a major problem in the Norwegian aquaculture industry. Researchers have been trying to find many different ways to fight these sea lice and to try to save the industry. They have been trying to develop vaccines and other chemical treatments to fight the sea lice. Unfortunately, some of the lice have developed resistance to the current means of defense. Researchers have now found a possible solution to the problem. “[A] cleaner fish called the Ballan wrasse is being enlisted to eat mass quantities of sea lice directly off infected salmon.”
Now that they have come up with a possible solution to this problem, the new problem has become how to produce enough of these fish to keep the parasite in check in all of the industry hotspots. They also need to figure out a place to keep all of these Ballan wrasse. They have come up with a few possible places that they could use to hold these fish including empty cod tanks which are not currently being used.
They have also run into the problem that these wrasse do not just feed on the sea lice, they can feed on algae and mollusks as well. The problem with this is how to control the wrasse to feed mostly on the wrasse and not its other food sources.
This fish could become a very important part of the effort to save the Norwegian aquaculture industry; researchers just need to find a way to sort of perfect the use of it. The use of animals to help other animals, especially for industrial purposes is a very interesting topic. For more information see the full article.
Sunday, April 25, 2010
Scientist know very little about evolution within the Marine environment. New studies with Hamlet Fish may shine light on the process of how new species arise. Hamlet fish are a species of coral fish found in the Caribbean. So far, there are ten known species of Hamlet fish each with unique color patterns. Each species is found in their own regions of the Caribbean. Scientists use to believe that these species arose from geographical isolation, but new studies are not finding evidence of this. Using SCUBA methods, researchers are analyzing the distribution patterns of these Hamlet fish. They are finding that there are "hot spots" for each of the ten species. Some species have more than one hot spot, and many of these hot spots overlap which is not evidence for evolution by geographical isolation. These studies are also helping to understand how competition for space and food influence how these species exist together. These studies are finding that ecology, instead of geographical separation, may better explain the evolution of Hamlet fish. Many scientists also believe that Hamlets are in the process of evolving into a new species. These studies may help us understand this process.
Friday, April 23, 2010
Throughout evolutionary history, animals have been evolving to better adapt to their environments. They have changed in ways that will better allow them to hide from and escape from predators, hide from and attack prey, and ways that have made reproduction more efficient. Marine animals are no exception.
Sea lilies have adapted to the fact that they are preyed on by sea urchins. If they sense a predator in the area, they can “shed their stalk ends like lizards’ tails and scoot away.” This is a very interesting find because it was originally thought that sea lilies were sessile and that they could not move from where they were anchored to the substrate. In studying fossils of crinoids, which is what a sea lily is, researchers found that similar marks from sea urchin “mouths” were found on the fossils that they found in current research. They concluded that this escape mechanism was derived from predation pressures and that it is a development that probably occurred only about 150 million years ago. Evolution is interesting! If you would like to read the full article click here.
Going to the Outer Banks was the most amazing trip. It was my first time to the beach and in the ocean. I had a lot of fun looking and collecting shells that we learned in class. I found it very interesting that all the shells that were washing up on the beach were actually old, since the Outer Banks is being eroded toward mainland. In this first picture the black clump being held is salt mash soil from the salt marshes that have been moved inward (I like to call it Spartina poop or marsh muffin).
The second pictures shows some class mates kayaking. This was also the first time i have ever kayaked. It was very fun to kayak through the salt marsh and look for Geukensia, Spartina, Juncus, and Littoraria, which we also learned about in class. This trip reinforced many concepts that we learned about in class and it was very interesting to actually see everything in the natural environment interacting with each other. This trip strengthened marine knowledge, friendship, and camping experience.
Thursday, April 22, 2010
The Thin-Billed Prion spends its molting season in two different areas, which are very different from each other. It is suggested that this is an adaption, that these seabirds can change their habitat based on the harsh and differing conditions of the oceans.
During their molting season, it appears as if they either travel to the Antarctica, or on the coast of Brazil. The vast majority of the birds tend to molt in the Antarctic waters, but a few individual birds will go to Brazil. Genetically the same, these are not different species of birds going their own way, they are the same species picking two different spots. This demonstrates that there is flexibility in the marine birds behavior.
To learn more click here
Wednesday, April 21, 2010
Tomorrow, April 22 is Earth Day. Last year on this day, Disney released a movie titled "Earth" which paid homage towards wildlife across the globe. This year they have done it once again however, focused their efforts upon the ocean. The film titled "Oceans" explores five of the Earth's oceans and the wide variety of life which inhabit these ecosystems. Extensive effort has be invested towards this film; over the past seven years the directors Jacques Perrin and Jacques Cluzaud have gathered footage of truly amazing marine life. For example, it took 28 weeks before footage of a blue whale was captured on film. The duo has previous experience working together on the Oscar nominated documentary "Winged Migration. The main message of this film is to educate viewers of the amazing yet fragile life which inhabit the ocean. To promote preservation, a portion of ticket sales will be donated towards coral reef rehabilitation.
A more detailed review may be found at: http://news.yahoo.com/s/ap/20100419/ap_en_mo/us_film_review_oceans
I found this great video of dolphins playing with bubble rings on Youtube.
You also hear stories every now and then about dolphins playing near cruise ships, and doing jumps for the tourists.
On the west coast of South Africa microbial mats have been recently discovered. These mats are the size of Greece and are a large source of food. This census was one of the largest global collaborations ever done, which included 2,000 scientists from more than 80 nations. Many new species have been identified during the census and each collected species genome was sequenced too. Microbes are the main source of respiration in the oceans; they turn dissolved atmospheric carbon dioxide in to usable carbon for other organisms. Microbes are also recycling other nutrients in the water such as nitrogen, sulfur, and iron.
The census also found abundant patches of zooplankton in various location in the ocean. The amount of identified zooplankton species has doubled with the census. Zooplankton are very important contributors to the food chain. This study also looked at burrowers in the abyss. With current technology an abundance of burrower species were also identified.
You can read more about these finding in this science daily article.
Marine Census finds huge Microbial Flats
The final reports of the ocean census will be presented in London in October.
That was why I was surprised to find this video from National Geographic’s “Critter cam” called Sea Lion Attacks Octopus: An Epic Battle.
I had thought that it would show an octopus attack a sea lion pup, with an adult sea lion coming to the rescue. What it does show is a sea lion repeatedly attacking an octopus, trying to eat it. Ignoring the ink-spraying defense mechanism, the sea lion keeps dragging the octopus to the surface to gain the advantage in the fight.
Sea Lion Attacks Octopus: An Epic Battle
This video proves the cold fact that nature is not always cute and cuddly. Sometimes it is a cold, indifferent battle to the death for survival, where only the fittest comes out on top.
Source: National Geographic’s “Critter cam”
Tuesday, April 20, 2010
It sounds crazy, but it actually worked with only 50 gallons of gas!
The “Algaeus” (a tricked-out hybrid Toyota Prius) gets 150 mpg because it runs on an algae-based biofuel.
Sapphire Energy says it will soon be producing green fuel that can compete with fossil fuels cost-wise.
Sources:  http://www.inhabitat.com/2009/09/09/first-algae-powered-car-attempts-to-cross-us-on-25-gallons/
Reading the full article will give more information on the new model and how the researchers at Cornell University are continuing their research.
- Coral Deaths
- Picture: Partially bleached coral at Looe Key Reef in Florida Keys National Marine Sanctuary. Credit to Eric Bartels
Monday, April 19, 2010
Wednesday, April 14, 2010
Sea snakes evolved from venomous land snakes that reinhabited the oceans about 5 million years ago. Recent research is finding the coloring of a sea snake can influence its vulnerability to algal fouling, which can significantly reduce their swimming speed (by about 20%). Their new life in water forced them to evolve traits that would allow them to survive better in aquatic environments: a paddle-shaped tail for swimming efficiency, valves to close their nostrils, and larger longs for oxygen. Most sea snakes are banded rather than one color, spotted, or stripy. To test whether or not color influenced algal fouling, scientist looked at sea snakes in the tropical Pacific Ocean. In this population, members of the same species could be any color form jet black to black and white banded. Over four years, researchers found that black snakes supported more algal cover than the black and white banded snakes. Next, they had to determine if this color really was the cause of higher algal levels. They suspended models (black, white, and white and black) in the middle water range. The results showed that color does directly influence that amount of algae that grew. They found that the black surfaces had the most algae, while white had the least. The consequence of having high algal growth is decreased swimming speed for the snake, with locomotor trials revealing a 20% decrease. At the same time, the algae may benefit the snake by providing more oxygen levels through photosynthesis. Apparently, the costs of being black is outweighed by some benefits.
Monday, April 12, 2010
Eels have many traits that suggest intelligence. They are known to hunt cooperatively with groupers in the wild, and go on hunger strikes when in captivity. They are also famous for being spontaneously aggressive. Moray eels have two sets of jaws; oral jaws and pharyngeal jaws (in their throat). The pharyngeal jaws serve to aid the eel in sending their prey down their throats. Each set of jaws has a set of rear facing fangs. When eels feed, they actually bite their prey twice. Joshua Reece, a graduate student at Washington University, decided to research eels for his dissertation when he saw seven species of eel occupying the same niche and eating the same diet. Upon discovering this he said "species don't do that; if they exploit the same niche they don't diversify, and if they diversify they don't exploit the same niche." This study involves two species of eel: the undulated moray (Gymnothorax undulatus) and the yellow-edged moray (G. flavimarginatus), sampled at a dozen different locations across the Indo-Pacific ocean. The are searching for genetic variations that might indicate a past or recent interruption among the gene flow in the eel populations. Reece and colleagues have found that both species of eel are genetically homogeneous across the entire ocean, despite the vastness of the Indo-Pacific. This proves that eels are the most "cosmopolitan of reef fish" and raises many questions as to how and why the 150 species of moray eel formed separate species at all. One hypothesis stems from a proposed "rule of thumb" that the longer the larvae live pelagically, the more genetically homogeneous the species is likely to be. Moray eels will be great to test this idea. As juveniles, they are poor swimmers, and adults only stick to a few square meters of reef. Eel have extremely long-lived pelagic larvae (several months or even years). These larvae (leptocephalus) is the simplest of the self-sustaining vertebrate forms. It has a slender body that is only one cell thick, and it has relatively no digestive tract. Their simplicity means that they cannot digest plankton, so they feed on the shed exoskeleton or the waste products of plankton. A second hypothesis is that their may be barriers in the ocean that the larvae cannot cross such as the Eastern Pacific Barrier and the Sunda Shelf. This hypothesis didn't seem to hold up when tested. Genetic analysis showed that where the eels were living didn't seem to have anything to do with their genetic makeup. These questions are still under investigation.
Picture from: http://jeroenarendsen.nl/pics/giant-moray-eel.jpg
Thursday, April 8, 2010
Roberto Danovaro, of the Polytechnic University of Marche, Ancona, Italy, and his research team have found an animal that can live and reproduce in anoxic environments. These animals are multicellular and belong to the group Loricifera. They took sediment samples from a deep hypersaline anoxic basin which are also known as DHABs from the Mediterranean sea. These environments were believed to be habitats to only viruses, Bacteria, and Archaea. This is not the first time these animals have been found. Before, it was just believed they they had fallen from the water column and fell to the benthos. However these animals are alive, metabolically active, and reproducing. Many were found to contain eggs.
Electronmicroscopy shows that these animals posses organelles that resemble they hydrogenosomes that were previously found in unicellular protozoans that inhabited anaerobic environments instead of aerobic mitochondria.
This finding has opened up possibilities of other metazoan life that could be found in other anoxic environments. It also opens up some light in past evolutionary history.
The full article can be found here http://www.sciencedaily.com/releases/2010/04/100407094450.htm
Monday, April 5, 2010
In the past, marine biologists relied on sound waves to locate schools of fish and map the ocean floor. A sound wave was emitted from the surface, and as it traveled deeper into the ocean and made contact with an object, the sound wave would scatter. This information from the scattered wave was then used to determine the size and shape of the object. Unfortunately a single sound wave would rarely consist of more than one frequency and data from different frequencies vary. The inaccuracy of sound wave interpretation increases with seawater turbulence; scientists may not be certain if the small scatterings of sound waves are tiny zooplankton or interference of turbulent waters.
Recently, the researchers at WHOI published details surrounding a new and improved methodology which relies upon broadband systems to measure an array of frequencies, resulting in the broadband acoustic spectra. By incorporating a wider range of frequencies this novel method is also able to determine the population density of fish as well as individual size. Being able to gather such information is crucial for the commercial fishing industry. In regard to zooplankton, this device has the ability to distinguish between zooplankton and ocean turbidity. This new technique is such an advancement in the field, it is being compared to the switch from black and white to color T.V.
Reading the full article gives more information on the study and what researchers are doing to monitor the sea otters.
- Sea Otters
- Picture: A Washington State Sea Otter, credit of the NOAA
Saturday, April 3, 2010
The physical and chemical makeup of the byssal threads was determined using a microscopic technique. It revealed the center of each thread was composed of stretchy collagen – like material coated in hard material made of proteins linked together with iron ions. The coating (Figure 1) is compared to having a sandpaper – like texture. This outer coating selectively manages where any damage will occur. As waves crash against the mussels, small cracks develop in the threads however; they will only occur between the iron ions. This spreads out the damage along the byssal thread and prevents breakage.
The researchers from this study hope to apply this new found knowledge to engineering materials to be both stretchy and hard.
Full text of this article may be found at: http://www.npr.org/templates/story/story.php?storyId=124319594