This summer, follow along as 4 UA students (Maddie, Morgan, Mary Ann and Marissa) journey through Brazil on a scientific expedition accompanied by their professor, Dr. Philip Scott and their two UA chaperones, Ms. Karen Haley (UA Social Studies Faculty) and Ms. Cecilia Nipp (aka the DODGE).
Saturday, July 31, 2010
Projecto TAMAR - Save the turtles!!!
Friday, July 30, 2010
Adao, Bahian artist
You can watch Adao create a special painting in the video below...
Oi Bahia!! The Red Fish Hotel in Salvador
Wilson, the best guide ever!!
It was also nice to learn more about Wilson on this trip. He is currently finishing his studies in Computer Science but will likely stay working at the agency for a while since tourism is the main industry in Iguassu. Wilson is married and has a four year old son, Julio Alberto. The students were CRAZY about Julio and found him to be the most adorable child ever. Marissa kept saying "his voice is like chocolate."
Now that we are in Bahia, we are missing Wilson but treasure the great times that we shared - Thanks a million for everything, Wilson! We want you to visit us in Dallas so we can be your tour guides!!
Our last stop: The Iguassu Bird Park
Thursday, July 29, 2010
More adventure at Iguassu...
During our visit to Argentina, we stopped at a Gem workshop and store. It had MASSIVE stones in front of the store which we admired. Mary Ann had previously presented information about geology and specifically about gemstones in Brazil and about which stones are most common in Brazil. We loved the store because it gave us a chance to see and compare amethyst, aquamarine, citrine, garnet and more. Everything was really beautiful (and sparkly) and we most enjoyed watching one of the artisans re-size and clean a lovely butterfly ring purchased by one of the members of our group (you can guess which one).
Invasive Species !!!! by Dr. Scott
Trails in Iguassu park cover a range of altitudes and vegetation types.
Some of these plants are true marvels of form, function and color, such as this beautiful green and yellow bamboo plant easily to be seen along the trails. Bamboos come in hundreds of species and are appreciated world-wide not only for their decorative potential in landscaping but also as true building materials in housing. They can also be attached to form scaffolding structure used in construction work, something commonly seen in China. They grow very fast and are a good source of celulose. Some varieties are planted for use in baby diapers.
Ferns can be seen along the park trails.
This special clover-like species thrives in dark, wet corners, over rocks, where other species are unable to adapt...Not only do they thrive on acid soils, but have in their leaves calcium oxalate crystals which make them unpalatable and tough to digest... a sure way to deter those herbivores!
The park's trails are well marked and have important plant species signaled with their common name such as this Guava-related tree the Uvaia, as well as with its ' Linnaean' scientific name (see binomial nomenclature) usually involving roots of words in Latin or/and Greek, which in someway describe the species... It is fun trying to guess details about the species, just reading its name which in many cases will describe color, size, chape or some other peculiarity about the individual.
Among the several exotic species in the park are ferns. Ferns are very 'happy' in humid, shady environments, such as along the parks trails on the forest floor, and many times indicate soils conditions. They are resistant to acid soils containing high levels of aluminium, toxic to most other plants...! Could we use this and other traits shown above to improve our crops through genetic manipulation?
Symbiosis
Even where there is practically not much in the way of nutrients available from the soil, such as over rock surfaces, the high air humidity allows for lichens (a symbiotic association of algae and fungi) to proliferate over large surfaces, successfully competing with ferns and mosses. Lichens will eventually erode rock surfaces obtaining a few nutrients.
Zebrina, a very common decorative household potted plant, is to be found everywhere along the park trails... An African species, specially well adapted to the local tropical rainforest conditions prevalent in Iguassu. Park rangers and erradication squads are continually harvesting Zebrina and other exotic plants from the park area in order to keep ecological balance in check... The local species of wild pigs, are actually quite happy to feed on it!
These little yellow rods are the beginnings of a wild 'black pepper' fruit. The plant is a very important food source for many species of seed eating birds.
We have enjoyed exploring and discovering these diverse life forms and we hope that you have learned something new along with us!
Wednesday, July 28, 2010
The Brazil side of Iguassu
Tuesday, July 27, 2010
COATIS !!!
Visit to Argentina: Iguazu National Park
This morning began with the thrill of crossing the border between Argentina and Brazil. There is a wall on a bridge which is is painted green and yellow on one side (Brazil) and light blue and white on the other (Argentina). As you can see, we had lots of fun posing in two countries at the same time!!
Monday, July 26, 2010
Plant Growth at Iguassu by Dr. Philip Scott
Perhaps you are asking yourself... What are the students learning as they walk through Iguassu? or What is Dr. Scott pointing to in all of these photos??? Well, our traveling science professor has graciously published some of what we learned today here on the blog so that our readers can learn as well. Please enjoy the informative blog entry below written by Dr. Philip Scott.....
Such is the case of this set of healthy bromeliads happily growing on a falling branch close to the waterfall spray rising from Dos Hermanos. Bromeliads come in a variety of forms and sizes and are part of decoration in modern cities and shopping malls around the world. They are able to collect water between their leaves and gradually absorb it as needed in times of less rainfall. However, this characteristic provides and ideal place for mosquito larvae development. As so, they have been torn down in many tropical countries so as to diminish mosquito populations.
Begonias, also very present around waterfalls, are delicate plants living among rocks and forest litter (dead leaves, branches and decomposing organic matter present on the forest floor). Their characteristic shiny ear-shaped leaves are easily recognized. The larger size of its leaves help the plant 'collect' sunlight, by exposing more area. Their shape allows for an 'easy drip' system which gets rid of excess water present in such places as close to the waterfalls.
These small epiphytes have lens-like shapes, which 'concentrate' the suns rays, compensating for their position in shaded areas... The 'lens' is made of water stored in the leaf. Other epiphytes found during the course of our trip included delicate ferns and many types of orchids.
Another way of overcoming the general lack of sunlight in the lower levels of the tropical rainforest, is to climb/scramble to the forest canopy, as exemplified by these intertwined branches of a vine or liana. Once the vine have reached the tree tops, it will spread its leaves and develop fully. These vines can store significant quantities of water, and so be used by travelers to quench their thirst in case of need.
All of the above examples show genetic plasticity, which is Nature's way of ' moulding' life forms to adapt to different and sometimes difficult environments.