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Page 1: Ecosystems 1 Introduction
Page 2: Ecosystems 1 Introduction

What is an What is an Ecosystem?Ecosystem?Ecosystems are interdependent Ecosystems are interdependent

communities of plants and animals communities of plants and animals together with the habitat to which they together with the habitat to which they have adapted – a natural unit with biotic have adapted – a natural unit with biotic and abiotic components that interact.and abiotic components that interact.

Page 3: Ecosystems 1 Introduction

It is like a tapestry.It is like a tapestry.

The Bayeux Tapestry

WHY?

Page 4: Ecosystems 1 Introduction

Biotic and Abiotic FactorsBiotic and Abiotic Factorsplants

reliefclimate

lightnutrients

mineralsair

waterfungi

bacteria soilanimals geology

Biotic FactorsBiotic Factors Abiotic FactorsAbiotic Factors

Page 5: Ecosystems 1 Introduction

Ecosystems exist Ecosystems exist at a range of scalesat a range of scales

Page 6: Ecosystems 1 Introduction

Small Scale – Micro - EcosystemsSmall Scale – Micro - Ecosystems

Under a rock

A pond

A hedgrow

Page 7: Ecosystems 1 Introduction

Large Scale – Macro - EcosystemsLarge Scale – Macro - Ecosystems

The Tropical Rainforest Biome

The Desert Biome

The largest scale ecosystems can be considered as BIOMES – a major

subdivision of the earths biosphere identified by a shared, characteristic

plant community, adapted to the environmental conditions of the region.

Page 8: Ecosystems 1 Introduction

The Worlds Biomes

Page 9: Ecosystems 1 Introduction

The Systems ApproachThe Systems Approach

• Ecosystems are complex natural systems that exist in a state of dynamic equilibrium.

• They are resilient to change.

• However they can also be very vulnerable to change.

Page 10: Ecosystems 1 Introduction
Page 11: Ecosystems 1 Introduction

It can get It can get pretty pretty complex!complex!

Page 12: Ecosystems 1 Introduction

Don’t forget the basic Don’t forget the basic components of an ecosystemcomponents of an ecosystem

Page 13: Ecosystems 1 Introduction

Key Terms SummaryKey Terms Summary BiomassBiomass HabitatHabitat CommunityCommunity Biotic / abioticBiotic / abiotic Organic / inorganicOrganic / inorganic BiomeBiome Systems approachSystems approach FeedbackFeedback BiodiversityBiodiversity Biosphere (ecosphere)Biosphere (ecosphere)

Page 14: Ecosystems 1 Introduction

BUTBUTWhy do we study ecosystems?Why do we study ecosystems?

Page 15: Ecosystems 1 Introduction

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