We are starting this series of listening and comprehension in English (of course), intented to help students interested on practising their knowledge on English by watching and listening videos exploring themes as ecology and environment in general. In this first attempt we are posting a video on the Atlantic Forest, specially on adaptation of plants to energy (sun radiation). The text below is a reproduction of the "written words of what was spoken" in the video here enclosed.I suggest some readers (the beginners) to watch and listen the video and afterwards read the text below:
We are in a remnant of the Atlantic Forest situated in the campus of the Federal University of Paraíba, in João Pessoa, Northeastern Brazil.
Three main ecological factors determine the structure and functioning of the components of this forest. They are: 1) Sun energy (or sun light); 2) Biogeocycling; 3)Biodiversity.
SUN ENERGY. Visible radiation (or sun light) has been a powerful factor in the evolution of forest plants. In the Atlantic Forest the sun radiation strikes the canopy with high intensity. Due to high density of plants the competition for the sun light stimulates a rapid elongation of tree stems. Ramification of stems is rare except on the apex (or top) of trees.
The leaves on top of trees are small and of light-green colour with low conentration of chlorophyll; both features because of high intensity of sun radiation on top of trees.
For compensating the lower radiation in the understory of the forest, the leaves tend to become larger and darker green. They also form drip-tips that lessen the impact of rain drops on soil.
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