Saltar navegación

Activa JavaScript para disfrutar de los vídeos de la Mediateca.

Ecology - Trophic levels - Contenido educativo

Ajuste de pantalla

El ajuste de pantalla se aprecia al ver el vídeo en pantalla completa. Elige la presentación que más te guste:

Subido el 18 de enero de 2021 por Jose Manuel R.

104 visualizaciones

Más información Transcripción

Descargar la transcripción

Hello! In this video we are going to see and study the traffic levels in ecology. 00:00:01
So as you have already studied in this unit and for sure you did the 00:00:08
first task, you know that the ecosystems are formed by several parts. 00:00:21
So, for example, it is formed by living things, organisms, such as animals or plants, but are formed also by the biotope, which is the environmental conditions, but also the soil, okay? 00:00:31
So, then this is the biotope and this is the biosynosis, okay? 00:00:50
so now we are going to see that biosynostics might be divided in different trophic levels 00:00:54
what is a trophic level trophic levels as your book says is a group of organisms which share 00:01:03
the same kind of food okay so during this classification we can discern three different 00:01:10
trophic levels. Producers, consumers and decomposers and mineralizers. 00:01:20
All these different trophic levels might be divided 00:01:27
into another categories. For example, producers which are autotrophic 00:01:35
organisms might be photosynthesizers or chemosynthesizers. Consumers which are 00:01:41
Our heterotrophic organisms might be primary consumers, secondary consumers, and tertiary consumers. 00:01:48
The primary consumers, due to their herbivores, they feed from producers that are mainly, for example, mainly plants. 00:01:55
The secondary consumers might be some of this extensive list, or tertiary consumers. 00:02:05
okay but secondary and tertiary consumers are more or less the same so the primary consumers 00:02:14
feed from the producers secondary feed from primary and tertiary feed from secondary or even 00:02:21
primary okay and finally we have the decompositional mineralizer which are also 00:02:28
So heterotrophic organisms, okay, that decompose the organic matter once the producer or the consumer has just died, okay? 00:02:34
Remember, this is very, very important, that an autotrophic organism is the one that converts inorganic matter into organic nutrient, okay? 00:02:50
Or into organic matter. 00:03:01
The heterotrophic organisms convert organic matter into another type of organic matter. 00:03:03
The same that, well, and, sorry, and decomposer are the kind of heterotrophic organisms that take organic matter and convert them into inorganic matter. 00:03:13
Yeah? 00:03:27
This is very important. 00:03:28
let's see in detail the producers okay when we talk about photosynthesis you know that we are 00:03:30
talking about organisms that carry out photosynthesis okay we are talking about plants 00:03:38
what are chemosynthesizers? chemosynthesizers among other organisms are mainly bacteria okay 00:03:45
Yeah, we're going to study now the basic chemical reactions related with energy and ecology. 00:03:52
Okay, so focus firstly in these producers, in photosynthesizers and chemosynthesizers. 00:04:03
If you think about photosynthesis, yeah, this is the photosynthesis reaction 00:04:12
in which you fix the plants mainly plants but also another organism such as algae 00:04:19
can take carbon dioxide from the environment yeah plus water and convert this inorganic matter 00:04:26
into glucose the organic matter and release oxygen okay that is the reason by which now 00:04:36
as you know in on earth we have oxygen in our atmosphere photosynthesizers can do that 00:04:46
because they can use the light as the energy shares okay they use the sunlight 00:04:55
for producing this reaction this is photosynthesis so every photosynthesizer carry out this 00:05:03
this reaction. What about chemosynthesizers? It's more or less the 00:05:12
same with some variation in the reactions. The 00:05:18
chemosynthesizers are much more diverse than photosynthesizers in terms of 00:05:26
chemical reactions and mainly the difference are this kind of molecule 00:05:31
this molecule from which they take the the electrons for obtaining the final 00:05:41
organic matter yeah in the case of chemosynthesizers one example of 00:05:50
chemosynthesizing are the ones that consume and these this compound of a 00:05:57
sulfur okay and the other difference regarding chemosynthesizers and related 00:06:06
to photosynthesis is the molecule that they use for obtaining energy in case of 00:06:14
photosynthesis for example this energy might be obtained from oxygen or nitrate 00:06:22
which is another another chemical compound with nitrogen okay another 00:06:29
basic chemical reaction created with energy is this one I'm sure that you 00:06:40
remember this important reaction which is called cellular respiration in the 00:06:49
cellular respiration the organism take glucose yeah and with the with the with 00:06:56
by adding sorry by adding oxygen they can produce energy yeah they release 00:07:07
energy producing water and carbon dioxide so if you think in a plan that 00:07:13
carry out both photosynthesis and respiration, cellular respiration, you can 00:07:20
see why plants can eat without... can produce their own food, okay, and 00:07:27
their own energy without need it without need it without need sorry any other 00:07:48
organism okay because if you think about this reaction yeah they can they take 00:07:57
this carbon dioxide and water producing glucose and oxygen and after that this 00:08:04
glucose and this oxygen might be used in cellular respiration obtaining water and 00:08:10
carbon dioxide and releasing this energy okay remember that the cellular respiration takes 00:08:16
place in the mitochondria okay why a plant or another organism needs this energy need this 00:08:24
energy just to build or for building structures such as leaves hair or another cells for growing 00:08:31
okay? So you eat mainly for obtaining energy through the cellular respiration for growing, 00:08:40
okay? Finally, I would like you to know that producers are essential in every ecosystem 00:08:48
and we are going to study why. You have to know that consumers, as you know, 00:08:59
consumers and the composer are heterotrophic, okay? As we have said just some slides before. 00:09:06
so this means that they need another sorry they need other organisms to obtain energy okay 00:09:12
however produces can produce its own fruit this means that only produces put energy into the 00:09:23
system this is very important so producers can take this of the solar energy yeah producing 00:09:31
producing organic matter, producing energy, and this energy is used by, for example, plants 00:09:40
for building new structures such as leaves. 00:09:50
After that, the primary consumers, for example herbivores, take these leaves, taking the 00:09:54
energy for them. 00:10:02
So that is the reason by which an ecosystem without producers is going to disappear. 00:10:05
Okay, so this is the end of this presentation, if you have any other questions just write 00:10:15
me an email. 00:10:24
Valoración:
  • 1
  • 2
  • 3
  • 4
  • 5
Eres el primero. Inicia sesión para valorar el vídeo.
Idioma/s:
en
Autor/es:
José M Ramos
Subido por:
Jose Manuel R.
Licencia:
Reconocimiento - No comercial - Compartir igual
Visualizaciones:
104
Fecha:
18 de enero de 2021 - 20:37
Visibilidad:
Público
Centro:
IES MARIE CURIE Loeches
Duración:
10′ 28″
Relación de aspecto:
16:10 El estándar usado por los portátiles de 15,4" y algunos otros, es ancho como el 16:9.
Resolución:
768x480 píxeles
Tamaño:
18.29 MBytes

Del mismo autor…

Ver más del mismo autor

Comentarios

Para publicar comentarios debes entrar con tu nombre de usuario de EducaMadrid.

Comentarios

Este vídeo todavía no tiene comentarios. Sé el primero en comentar.


EducaMadrid, Plataforma Educativa de la Comunidad de Madrid

Plataforma Educativa EducaMadrid