1. why do we (as scientists) bulid food webs?
Scientists need to find the balance of the food web to build it they need to know how one animal can affect the whole ecosystem. we build them to know what way is the energy going from animal to animal, we also build them to know what is the start of the food web, what is the main source of energy.
2. give an example of how one change might affect many other parts of the ecosystem.
if you remove a part of the ecosystem it collapses, for example lets say we remove a snake the snake eats mice so the mice don't have a predator any more so they over populate if the mice over populates what they eat, plants will be very low populated and mice will eventually die because they don't have what to eat any more, and what eats the snake the eagle the eagle will starve and die.
3. give an example on how one change in La Quebrada might affect the rest of the ecosystem
one change in la quebrada is in like any other ecosystem it collapses.
lets say we take out a fish out that swims in the creek bigger fishes might die because they feed of of that fish, and what does that fish eat aquatic insects and smaller fish the smaller fish and the aquatic insects over populate if that happens what the insects and the smaller fish will eat all theyr food and die.
Wednesday, September 24, 2014
The creek is a beautiful place full of life, and having the chance to study it is a great learning experience ,we get to measure there types of living organisms such as plants, trees, and animals. People are planing to build over there and that will destroy the whole ecosystem up at the creek.
I am going to talk about three plant species. First the feijoa plant it gives a fruit called feijoa, there was an abundance of 3 feijoa plants. The second is called the African hemp there was an abundance 1 of them. And the third is called the eucalipus but it's scientific name is eucalypus globulus there was an abundance of 1 .
There are lots of different species of trees. One of them is the acacia mimosa or acacia there is an abundance of 1 in my quadrant, it's hight is 7.45 meters. The other tree called callinandra trinervina or carboneo mesured 7.57 meters and there was one. And last of the trees the magnolia grandiflora or manglolia there was 3 of them, it had a hight of 9.23 meters.
We found lots of animals, here are three:
One that we found was a black spider hanging of its spider web it was about 2 cm squared. The second animal was a gray fish, swimming against the current of the creek, it measured 21 centimeter. And then third animal was a fast mosquito with stripes, it was very small around 1cm squared.
The creek is a wonderful place and full of living organisms if we break it down to build we will be killing lot of life. Animals use it as home we saw a birds nest up at a tree it's not fare to kill that family and all animal families up in the creek.