Our planet has lots of different biomes, the fresh water biome, marine biome, desert biome, tundra biome, forest biome and grassland biome. A biome is an area with similar climate and species. For instance, both the Sahara desert and the Gobi desert are part of the desert biome. They are different continents and some different species, but similar climate. The living species in both deserts are well adapted to dry climate. On my trip around the world, I have been to many of these different biomes, and my study is centered on the three that I find the most interesting. I have visited the blistering winds of the Sahara desert in Tunisia (the desert biome), the fish filled ocean of the tropical Atlantic in Brazil (the marine biome) and the mighty tree filled South American cloud forest in Peru (the forest biome). I have also studied the animals in these different biomes and the ways they have adapted to their habitat. Many species are competing against each other, and the species that is better adapted to their habitat will rise and the other will fall. In my studies, I also unexpectedly found that some species have found a way to cooperate with other species in order to have a better chance of survival.
I explored the marine biome in Brazil, snorkeling in coral reefs along the beach. Coral reefs are packed with fish, which makes them some of the most important marine habitat. Only 8% of our planet’s waters are sustainable for coral reefs, but most of earth’s fish thrive there. Coral reefs can only be found in shallow waters, usually near the equator in tropical regions of the world (Hawaii, Brazil, Indonesia, etc.).
Coral reefs are usually found between 10° and 25°C (50° to 77°F). According to the dictionary, a coral reef is a formation, at or near the surface of tropical waters, formed by skeletal deposits of corals. The creatures that live among the coral reefs can range from sharks to microscopic plankton to whales.
Coral reefs are usually found between 10° and 25°C (50° to 77°F). According to the dictionary, a coral reef is a formation, at or near the surface of tropical waters, formed by skeletal deposits of corals. The creatures that live among the coral reefs can range from sharks to microscopic plankton to whales.
Corals are “polyps.” The first Polyp is a small, 1 cm circumference animal. But it multiplies. Soon one polyp is two, and then two become four. The only problem is that polyps grow slowly, so it could take 30 years for the circumference of a coral to grow over a foot. They get carbon dioxide and calcium that is dissolved in the water, and absorb them to make a shell-like cup that they can retreat into. When the polyps die, they leave behind their shells, and other polyps grow over them, making a living skin around the dead coral or limestone. Polyps eat algae by shooting a harpoon-like spear to grab the algae. Then, like a fishing pole, they reel the algae in by a fiber that in connected to the “harpoon.” They reel it into a small chamber, their stomach, to eat the algae.
Coral offers protection to small fish from bigger fish, although some predators have a very good strategy for getting the small fish out of the cracks and crevices of the coral. In Indonesia there are sea snakes that are too slow to catch the fish while they are swimming, but they can wiggle into the coral to corner the fish and eat them. The big fish and the sea snakes work together. First the big fish scare the smaller fish into the coral. Then the snakes can capture the small fish in the cracks of the coral. If any fish escape unnoticed from the sea snakes, they run (more like swim) right into the waiting big fish. I think that it is amazing that the fish and sea snakes work together that way.
Shrimp and gobies in Red Sea coral reefs also cooperate. While the gobies (small fish) watch for predators, the shrimp shovel sand out of the tunnel they share. The shrimp are mostly blind so they can’t see the predators. The shrimp keep track of the gobies by periodically putting antennae on them to make sure they are there. When the gobies dive into the tunnel, they warn the shrimp that predators are coming. The gobies are glad to have a tunnel for protection that they don’t have to dig themselves, so it works out for the two of them.
Some interesting adaptations of coral reef species include the squirrel fish that is nocturnal and has big eyes to see better in the dark. There are also some lobsters and crabs that are nocturnal. Not many sea creatures are nocturnal so this is an advantage because there are both less competition and fewer predators. The flounder, a flat fish, is camouflaged to blend into the sand. Limpets, oysters, barnacles etc. are armored against the waves and are anchored to rocks and coral as to not be swept away by the waves. They also can be in the sunshine and out of the water for long periods of time when it is low tide. Gobies (fish) can jump from pool to pool until they reach the ocean.
My favorite sea creature is the radical mimic octopus. The mimic octopus “mimics” sea predators such as the sea snake and the lionfish by changing its attitude and shape. This scares other predators away.
Some types of urchin bunch together to avoid predators that don’t mind the urchin’s spikes. The blue triggerfish blows urchins over so they can eat the softer part inside.
The bright colors of coral reef fish seems more like a curse than an adaptation. Wouldn’t you want to bring the least amount of attention to yourself as possible? Actually, the bright fish blend into the type of coral their species lives in. The saw-tooth blennies and other species of fish attack the eyes of their prey, so some fish have stripes over their eyes and dots to trick those predators. Some fish change color to communicate with other fish.
Anemones are poisonous, so not many fish can get near their tentacles without getting hurt, although the anemone fish can. Anemone fish live in anemones and clean the anemones off. In turn, the anemones protect the fish. Anemone fish also scare the anemone’s predators away.
Some coral reef fish store an oil inside of themselves as to not sink into the depths of the ocean and can float without swimming. All species of coral reef creatures have adaptations to their unique habitat.
Did you know that without parrot fish many coral reefs would be dead? The parrot fish eats seaweed like a cow in a field of grass, and if there is too much seaweed in a coral reef ecosystem the seaweed would suffocate the coral (although too little seaweed is bad also because seaweed is one of the main producers in the coral reef biome). Coral reefs depend on parrot fish the same way sea snakes depend on big fish, and big fish depend on the sea snakes, and shrimp depend on gobies, and gobies depend on shrimp. All coral reef species are interdependent.
When we went to Brazil, we had snorkeling gear and snorkeled in the Atlantic Ocean a lot. There was a great variety of tropical fish there. There were lots of different species of coral and sea creatures. I saw puffer fish, colorful eels, octopi and even a four foot long sea turtle. When I first went snorkeling, it was very cloudy and I couldn’t see very well, but when the sun came out, it was like someone opened a curtain. It was very clear, just like above water. There was a whole world under water at this crowded beach and no one knew it except me.
Sadly, coral reefs are being destroyed worldwide. Some scientists believe that in 2050, only 1% of coral reefs will be in good condition. This is because oil, gas and pesticides are being spilled into the oceans and killing the corals and sea creatures. Also, people are over-collecting coral and many corals are extinct or endangered. Parrot fish are also endangered because their habitat is disappearing and lion fish are coming into their habitat. Lion fish eat lots of other fish, including parrot fish. Without parrot fish, many reefs will be destroyed. Erosion is also bad for coral reefs because it can bury coral and suffocate it. Mangroves are good for coral reefs because they hold back erosion. Sadly, mangroves are being cut down all over the world. Boats are also destroying coral reefs because coral is very sensitive and if you drop an anchor on coral, you will destroy it. It could take a hundred years for the coral to grow back. Propellers can also harm coral. Global sea temperatures are increasing due to global warming, and coral is very temperature sensitive. As temperatures are increasing, corals are dying. Some coral reef areas are being protected. I hope that they are saved in time so other people can enjoy my colorful experience.
The desert is one of the harshest biomes in the world. Deserts can be hot, sunny and dry like the Sahara desert or cold and icy like Antarctica. That’s right, Antarctica is a desert. In fact, it is the biggest desert in the world, and is also the continent that receives the least amount of precipitation (snow, rain, hail, sleet) in the world. The sun melts the ice, so Antarctica is only seven million square miles in the summer, but it stretches about fourteen million square miles in the winter. The Sahara is the 2nd largest desert in the world. It stretches all across northern Africa, over three million, two hundred fifty thousand square miles.
The temperature in the Sahara desert can be as high as one hundred thirty-six degrees Fahrenheit in the day and as low as thirteen degrees at night. Despite the harsh conditions of the Sahara (sand storms, drought, extreme heat etc.), it houses over two million people.
Ten thousand five hundred years ago the Sahara was just as hot and dry as today but from then to five thousand five hundred years ago it was green and populated. Ten thousand five hundred years ago rains turned the Sahara into a livable place for humans, elephants, rhinos, hippos, crocodiles, giraffes and thirty different species of fish more than 6 feet long. People from the crammed Nile valley populated the area which is now the Sahara. They lived there for five hundred years until it stopped raining so much. As it turned back into a desert, many people went back to the Nile valley, but some stayed there and their decedents still live there today. They are known as Berbers. They are well adapted to the conditions of the Sahara.
Plants in the Sahara also have to be very well adapted to the heat and drought. Euphorbia is the Saharan equivalent to cacti. They save water they get from rare rainstorms in their stems or leaves that have evolved into spines to retain moisture. They aren’t really cacti. The only true cacti are found in the Americas. Euphorbia is more like ice plant or aloe. Saharan grasses have shallow roots, so when rain comes they can absorb as much water as possible. Drought is the number one problem for plants in the Sahara because it only gets about four inches of rain per year, about the same amount the southern U.S. gets in one thunderstorm.
The animals in the Sahara also have to be well adapted to the heat, sun and dryness. The sand cat has wide paws to keep it from sinking into the sand and also has fur to keep it warm on the cold nights. The long tailed scorpion lives in the south of the Sahara and is eight inches long, making it the largest scorpion in the world. It hides under rocks in the day to escape the heat and hunts in the night. The myth that the ostrich buries its head in the sand comes from the fact that when it hides it puts it’s head on the sand as to avoid being seen from predators. The ostrich lives in the Sahara and is 2nd fastest animal in the world after the cheetah, which also can be found in the Sahara desert.
The camel stores fat in its hump, not water, and is the only animal that can turn fat into water. Camels can drink 30 gallons of water in 10 minutes! This is important because there might be competition in between the animals of the desert and an animal needs to drink lots of water before other animals arrive. We rode camels in the Northern Sahara, and when we came to some water for them to drink, boy were they thirsty! They slurped thirstily for a few minutes and then didn’t drink again after that.
When we went to the Sahara desert in Tunisia, we once came to a concrete tub filled with water and from it lead a plastic pipe. When our guide turned a valve on the pipe, water came gushing out. The camels drank and the tub filled up and overflowed. Soon the water made a small ravine, (which shows how well the sand resists erosion), and all of a sudden, two toads came out of the sand and got swept away in the water. These toads bury themselves in the sand, and when water comes they have a drink and a swim.
Sadly, the Saharan animals are dying because of humans. Tortoises are being killed for their shells and snakes and scorpions to be sold to tourists. Roads are bad for the animals because they get run over, especially tortoises. It is bad when people bring their livestock to a certain area to graze and stay there because the animals can wipe out all the plants there. When the goats and camels take too many leaves off one plant the plant dies. If plants in an area it is hard for plants to start growing there again because plants hold back wind erosion. If farmers keep moving with their herd, it is better for the plants.
People are also using a lot of water and are making it a lot harder for aquatic animals in the desert. The Saharan gazelle is being hunted and only a dozen or so remain in the wild in the northern Sahara.
The Saharan animals are dying but the Sahara is growing. Scientists believe this desert is moving north toward Europe. In 2003 a massive heat wave took fifteen thousand lives in France and three thousand in Italy with temperatures over 100° F. The temperature of the hottest two weeks in Europe could become the coldest and the highest temperature would be unbearable. If the Sahara does move to Europe, many people will have to travel to other parts of the world because of water loss like the people five thousand five hundred years ago moved to the Nile valley.
Cloud forests are one of the liveliest ecosystems in the world. They are also one of the most threatened.
The last biome that I will tell you about is the Peruvian cloud forest. The elevation where a cloud forest is usually situated is between two thousand and three thousand meters (six thousand six hundred to nine thousand nine hundred feet) above sea level. They are in the clouds, which is why they are called “cloud” forests and they get most of their water from the clouds and the rest from the rain. There are over seven hundred different species of trees in the cloud forest, several hundred species of ferns (some large enough to be considered trees) and thousands of different types of other plants.
Enormous numbers of epiphytes (moss, orchids, ferns, bromeliads etc.) live on the trunks and branches of trees in the cloud forest. Epiphytes are plants that live on other plants, normally trees although some plants have ways of keeping them off. Epiphytes get their nutrients from grabbing water drops from the clouds.
There are many animals and insects in the cloud forest such as the cock of the rock, a rare, beautiful, endangered bird. The cock of the rock is also the national bird of Peru. There were also many types of shiny, colorful beetles. The monkeys that live in the rain forest swing and leap through the trees to avoid predators that may be on the ground.
Hummingbirds migrate to the cloud forests and rain forests part of each year. They are the only birds that can hover, like a helicopter, and fly backwards so they can stay in the air when drinking nectar from flowers. Their beaks are shaped long and thin so that they can insert them into trumpet shaped flowers to lick the nectar with their long tongues. Hummingbirds are also the smallest birds discovered.
Species of insects in the cloud forest are camouflaged like the fish in coral reefs, but color is not the only way camouflage is used. Many insects look like leaves and plants, in color, shape and texture. The most dangerous thing for one of these insects to do is move. If they do, they will probably be detected and eaten. If one of these insects moves, they will probably do it avoiding attention. The stick bug would do so as if moving in the wind. A moth that looks like a leaf will fall off a tree like a leaf getting blown off a tree in the wind.
The spectacled bear is the largest native bear and carnivore in South America. They can grow over five feet in length and can weigh up to three hundred pounds. They are omnivorous, so they can eat both meat and plants. These bears are called “spectacled” bears because the fur around their eyes looks like glasses or spectacles. Spectacled bears are black with light brown fur around their eyes. When we were in an eco lodge in the cloud forest, our guide Hector told us that two police men shot a bear not knowing it was endangered and ate it! Hector has the bear paw claws and all hanging on his wall.
These bears are mostly vegetarian, eating fruit, orchid bulbs, cacti and honey. Being great climbers, spectacled bears sit for sometimes days in trees waiting for fruit to ripen. Spectacled bears also might eat small rodents, birds, insects and, if hunger drives them, small cows. Farmers shoot them when they get close to their animals, which is one reason why they are endangered. Logging and clearing land for cattle grazing, destroys their habitat and food source/s.
The cloud forests and rain forests are being destroyed for cattle grazing and coca plantations. They are logged to provide fuel for both heating and cooking and paved over for roads. Forest covered mountain sides are blown up to get at precious metals. Only three percent of cloud forests remain, and some scientists believe that in ten years from now, all the cloud forests will be utterly destroyed. Only time will tell.
I have enjoyed all of the natural wonders of the places that I have been to. Some of the most ecosystems are the most threatened or disappearing off the face of the earth. Many species of animals and plants are extinct. In the cloud forest and rain forest, there have been many cures found in plants for human diseases. A plant that was the cure for some incurable disease might be extinct or maybe it is still out there. Most of our commercial fish (tuna, salmon etc.) have spent the young years of their life in coral reefs and mangrove swamps. Without them, there would be a low drop in the amount of fish in the world’s oceans and a high raise in the price of fish. Some of these places are being protected by governments and non-profit groups like Ecoan, but there are some things you can do to help.
Finally, a list of things YOU can do to save these biomes:
v When driving in any desert, don’t drive to fast or you might hit an animal.
v NEVER think dumping waste in the desert is a good idea, there are animals out there too.
v Buy organic fruits and vegetables. Pesticides can be harmful to you and can get to the ocean, harming sea life.
v NEVER take plants from any desert.
v Never buy a pet that is caught from the wild including cloud forest and rain forest birds and tropical fish.
v Try to buy “Huatusco” coffee or another brand of coffee that is shade grown coffee and grown in the cloud forest. Shade grown means that they
planted the coffee under the trees and did not cut them down.
v If you go to any beach for vacation, be aware! Don’t touch any coral and be careful! Remember how long it took it to grow. Don’t take any animals from tide pools or coral reefs.
v Last but not least, control what you buy. Stay local. Goods produced in other countries may be cheap, but they cause lots of international damage. Don’t buy beef from Peru. Buy local fast food. International fast food companies buy cheap beef from South America, usually raised on cleared land that used to be rain forest or cloud forest. Don’t buy endangered fish.
Websites about the cloud forest:
http://animals.nationalgeographic.com/animals/mammals/spectacled-bear.html
http://www.earthwatch.org/europe/downloads/Get_Involved/Ecuador_casestudy.pdf
Websites about coral reefs:
http://marinebio.org/species.asp?id=260
http://inchinapinch.com/hab_pgs/marine/coral_%20reef/index.htm
http://en.wikipedia.org/wiki/Coral
http://dsc.discovery.com/convergence/planet-earth/planet-earth.html
http://www.marinereef.org/reports.php?reportid=4
http://books.google.com/books?id=jp4uAYEx_goC&pg=PA190&lpg=PA190&dq=coral+reef+fish+bright+colors+adaptation&source=bl&ots=YPSqOzefkx&sig=8wCLHwS5R02LP3WXctOi9su9odg&hl=en&ei=Wck7SpO7DdKZjAfy-4UY&sa=X&oi=book_result&ct=result&resnum=2
http://library.thinkquest.org/17456/camouflage3.html
Websites about the Sahara desert:
http://articles.glenns-garden.com/Art/1655/93/Plant-Life-of-the-Sahara.html
http://www.livescience.com/history/060720_sahara_rains.html
http://inchinapinch.com/hab_pgs/terres/desert/desert.htm
http://www.africanculturalcenter.org/3_2_1endangered_detail.html
Tags: adaptation · Brazil · Cloud Forest · Coral · Coral reef · Peru · Tunisia
