Ecosystems Table of contents 01. What is an ecosystem? 02. Types of ecosystems 03. Characteristics of an ecosystem 04. Examples of ecosystems 01. What is an ecosystem? An ecosystem is a system formed by a set of organisms, the physical environment in which they live (habitat) and the relationships between living organisms and the physical space established between them. The species of living beings that inhabit a given ecosystem interact with each other and with the environment, determining the flow of energy and matter that occurs in that environment. How are the organisms of an ecosystem classified? In an ecosystem there are a large number of organisms with many different functions. There are 3 categories of organisms in ecosystems: producers, consumers and decomposers. Classification of organisms 01. Producers They are autotrophic organisms, that is, they are capable of generating their own food from simple substances with the help of sunlight. They are the basis of the food chain. Classification of organisms 02. Consumers These are heterotrophic organisms, which means that they do not have the capacity to manufacture their own food, so they feed on other beings. They can be classified as: ● Primary consumers or herbivores ● Secondary consumers or carnivores ● Tertiary and quaternary consumers or super carnivores Classification of organisms 03. Decomposers These are organisms that feed on decomposing organic matter from other living organisms. 02. Types of ecosystems Types of ecosystems Terrestrial ecosystem They occur on the earth's crust and out of water in various types of relief: mountains, plains, valleys, deserts. There are important differences between them in temperature, oxygen concentration and climate, so the biodiversity of these ecosystems is large and varied. For example: Forests, deserts or jungles. Types of ecosystems Aquatic ecosystem They are characterized by the presence of water as the main component and are the most abundant type of ecosystem: they constitute almost 75% of all known ecosystems. This group includes the ecosystems of the oceans and those of fresh or salty inland waters. For example: rivers, lakes and lagoons. Types of ecosystems Mixed ecosystem These are ecosystems located in areas of "intersection" of different types of terrain, for example, in which aquatic and terrestrial environments are combined. Mixed ecosystems, also called hybrids, share characteristics of both terrestrial and aquatic ecosystems, and are considered transition zones between both types of ecosystems. 03. Characteristics of an ecosystem Characteristics of an ecosystem 1. They vary in size and structure according to their type. 2. They can be terrestrial (in reliefs such as desert, mountain, prairie), aquatic (fresh or saltwater) or mixed (such as those found in wetlands). 3. They can be natural or artificial (created and/or intervened by humans). 4. They are dynamic and variable environments that experience natural or artificial changes and a constant flow of energy and nutrients between the factors that constitute them. 5. They are complex systems due to the interactions among their members. The greater the biodiversity, the greater the complexity of the ecosystem. 6. They can be altered naturally (such as natural catastrophes) or by human action (such as deforestation, pollution and indiscriminate fishing). 04. Examples Examples Polar ecosystems Coral reefs Rainforest / forest ecosystems Examples Forest / woodland ecosystems Lentic ecosystems / lagoons Wetland ecosystems Thanks Do you have any questions? yourmail@freepik.com +34 654 321 432 yourwebsite.com CREDITS: This template has been created by Slidesgo, and includes icons by Flaticon, infographics & images by Freepik and content by Eliana Delacour Please keep this slide for attribution Alternative resources This is a selection of alternative resources whose style fits that of this template: Vectors ● ● ● ● ● ● ● ● ● ● 3d rendering of ecosystem I 3d rendering of ecosystem II 3d rendering of ecosystem III 3d rendering of ecosystem IV 3d rendering of ecosystem V 3d rendering of ecosystem VI 3d rendering of ecosystem VII 3d rendering of ecosystem VIII 3d rendering of ecosystem IX 3d rendering of ecosystem X Resources Did you like the resources used in this template? 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