Biology Presentation

Hi Guys!!!

We are :

Ingrid Elvina (17)

Nurul Rosyidah (25)

ECOSYSTEM

Chapter 7

Hierarchy of Life

1. Individual, a single organism.2. Population, a group of members of speciesin a

prescribed area at the same time.3. Community, an assembly of all populations which

are potentially interacting in a particular area.4. Ecosystem, a system consist of communities and

its abiotic components with their own characteristic.

5. Biome, ecosystem in certain area.6. Biosphere, the entire portion of the earth

inhabited by living organisms

Ecosystem Consist of

Abiotic Components

Biotic Components

Ecosystem Components

A. Abiotics ComponentsAbiotics components consist of non-living thing

B. Biotic ComponentsBiotic component are made up from organisms. Biotic component comprise into producers, consumers, and decomposer.

In an ecosystem, there are relationships between its components :

1. Food relationship : the relationship to find foods.

2. Symbiotics relationship : a close association between organisms of two or more species that live together in direct contact.

There are 3 main types of symbiotics relationship :

Mutualism Symbiotic

Comensalism Symbiotic

Parasitism Symbiotic

Types of Ecosystem

AquaticEcosystem

Types of Ecosystem

Aquatic Ecosystema) Freshwater ecosystem

Freshwater ecosystem is distinguished as lotik freshwater ecosystem and lentik freshwater ecosystem.

Lotic Ecosystem

Lentic Ecosystem

b) Marine ecosystem

marine ecosystem is subdivided in the litoral zone (intertidal), which includes estuaries and shores; oceans floor that is coral reefs area and pelagic zone (deep oceans).

Terestrial Ecosyste

m

Tropical

RainForest

Savana

Meadow

DesertDecidiousForest

TAIGA

Tundra

Terrestial Ecosystem 1. Tropical Rain Forest

Tropical rain forest occurs in equatorial area where the average temperature is 25° C with high rainfall in average of 200 – 452 cm per year.

2. Savanasavana occurs in an area around the equator with low rainfall average of 90 – 150 cm per year.

3. Meadow meadow occurs in area where the temperature is warm with low rainfall average of 25 – 27 cm per year.

4. Desert

Desert are located in the position of 20 – 30° N and S, with low rain falls average (around 25 cm per year)

5. Decidious Forest

temperate decidious forest are mostly located in the substropics with hot summer and clod winter .

6. Taiga Taiga is located in the north area of temperate decidiuous forest and on tropical mountains.

7. Tundra

The Tundra located close to the North Pole (60°N) is called artic tundra. Whereas the tundra located in the top of mountain is called alpin tundra.

Artifical Ecosystem Artifical Ecosystem is the kind of ecosystem which is made of intentionally by human

Energy Flow and Biogeochemical Cycles

1. Energy FlowThe energy usage passes one way through several processes, from producer to consumer I, consumer II, consumer III, and to the next ecosystem component in sequence, and ends in decomposition process. However, a part of the energy is lost as heat, and this phenomenon agrees with The Thermodynamics law.

a) Ecosystem ProductivityThe ability to take and keep energy in the body in an ecosystem is called ecosystem productivity. Ecosystem productivity is divided into primary and secondary productivity.

b) Food Chain and Food Web

food Chain is relation between organisms of eating and being eaten in certain order. A certain producer can make up several food chains which are interconnected, forming a food web.

c) Ecological PyramidThe trophic structure of an ecosystem forms an ecological pyramids. Some pyramids can be recognized in ecosystem are a pyramid of number, the pyramid of biomass, and energy pyramid.

2. Biogeochemical Cyclesa) Water Cycle

Is the movement process of water from atmosphere to the earth.

b) Oxygen CycleIt is the main gas in life, necessary for the respiration process.

c) Carbon Cycle in photosyntesis process CO₂ and water from complex organic molecule C₆H₁₂O₆

d) Nitrogen CyclePlants can use nitrogen if it is in the form of nitric ion

Relationship between Human Activities and Environmental Problems

1. Human activities which cause the environmental problems.

Logging (Deforestation) Energy resources

exploitation Environmental pollution Wastes

Types of Pollution Soil pollutionAir pollution, consist of :

Smoke Sulfur Dioxide Nitrogen Oxide Carbon Monoxide Carbon Dioxide Lead

Water Pollution, consists of :1. Water wastes

2. Inorganic poisonous

3. Pesticide

4. Oils

Efforts in Environmental Conservation

a) Environmental Conservation, Conservation is an effort to protect, manage, and renew natural resources. The method are :

Life source Conversation Soil Conservations Forest conservations Water Conservations Energy Conservations

b) Waste RecyclingIs the reprocess of materials, which have been used to obtain new products.

1. Benefits of Waste Recycling It reduces the needs of raw

materials For energy used conversation For reducing the pollution It can save costs

2. Recycling ProcessReuse is to use again the wastes without changing its character. Recycle is to use again the wastes after being processed. The materials that can be recycled are :

a) Glass Recyclingb) Metal Recyclingc) Plastic Recyclingd) Paper Recyclinge) Organic waste Recyclingf) Water Recycling

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