1
00:00:01,179 --> 00:00:07,599
Hello buddies, this is the last video of unit number 5, Relationships in an Ecosystem.

2
00:00:08,320 --> 00:00:12,460
And this time we are talking about the beneficial and harmful relationships.

3
00:00:13,320 --> 00:00:19,059
Living things in an ecosystem interact with each other, and depending on the type of interaction,

4
00:00:19,519 --> 00:00:22,940
there are different types of relationships. There are four of them.

5
00:00:22,940 --> 00:00:31,039
For example, mutualism, commensalism, parasitism, and competition.

6
00:00:31,839 --> 00:00:34,000
Let's start with mutualism.

7
00:00:36,020 --> 00:00:40,979
Mutualism is the relationship between two species when both benefits.

8
00:00:41,420 --> 00:00:42,759
And I'm giving you an example.

9
00:00:45,479 --> 00:00:50,579
Bees obtain nectar from flowers, and the flowers are pollinated by the bees.

10
00:00:52,820 --> 00:01:00,039
Commensalism is the relationship between two species when one benefits and the other remains unaffected.

11
00:01:00,780 --> 00:01:08,040
For example, Grimoras live around sharks and feed on the bits of food sharks leave behind.

12
00:01:09,180 --> 00:01:13,239
This relationship benefits Grimoras but does not affect sharks.

13
00:01:15,239 --> 00:01:20,599
Parasitism is the relationship between two species when one benefits and the other suffers.

14
00:01:21,500 --> 00:01:23,980
The species that benefits is called parasite.

15
00:01:24,739 --> 00:01:32,680
And as an example, here you are a very annoying or irritating parasite, fleas.

16
00:01:33,659 --> 00:01:36,900
Fleas live on the skin of dogs and suck their blood.

17
00:01:36,900 --> 00:01:47,439
The last relationship is competition, which is the relationship between different species that have the same needs.

18
00:01:47,439 --> 00:01:55,439
And as an example of competition, we can talk about squirrels and doe mice.

19
00:01:55,439 --> 00:02:03,439
They both compete for the same shelters in trees, and they need the same food.

20
00:02:03,439 --> 00:02:07,439
And this is the end of the video. Bye bye, students!