'Trophic levels' diaporamas de présentation

B. Diversity 3. Relationships with Productivity a. Productivity increases diversity b. Diversity increases productivity B. Diversity 3. Relationships with Productivity a. Productivity increases diversity b. Diversity increases productivity - Sampling Effects

Energy flow in ecosystems Lecture 6 Chap. 6 What is an ecosystem? System = regularly interacting and interdependent components forming a unified whole Ecosystem = an ecological system; = a community and its physical environment treated together as a functional system OR, MORE SIMPLY

Ecosystems Reading: Freeman Chapter 54 An ecosystem is the unit composed of all the living things in a single place at a given time, in addition to , the important non-living components of the system.

ECOLOGY 2. Case Study: Black and white and spread all over. Small, black and white shellfish Introduced to Lake St. Clair, Canada, in 1988, in discharged ballast water Within 2 years, the zebra mussels invaded all 5 Great Lakes Populations grew exponentially

Multitrophic interactions. Interactions across trophic levels, or involving more than two “players”. Multitrophic interactions.

45. Ecological Communities. Chapter 45 Ecological Communities. Key Concepts 45.1 Communities Contain Species That Colonize and Persist 45.2 Communities Change over Space and Time 45.3 Trophic Interactions Determine How Energy and Materials Move through Communities.

Human Impact in Aquatic Systems: Fish Catching vs. Fish Raising. What are human impacts?. Fish and aquatic invertebrates (clams, crabs, squid, etc.) currently supply 16% of world protein, higher in developing countries

Biological Communities and Species Interactions. Outline. Critical Factors and Tolerance Limits Adaptation Natural Selection Speciation Ecological Niche Species Interactions Community Properties Succession Introduced Species and Community Change. Critical Factors and Tolerance Limits.

Chapter 3 The Biosphere. Section 3 – 2 Energy Flow. Energy Flow. Energy flows through Ecosystems. Energy In: . Consumers Convert to Heat. Producers Convert to Carbohydrates. Producers - Photoautotrophs. Key Concept: Sunlight is the main source of energy for most life on earth.

Energy flow in ecosystems. Lecture 6 Chap. 6. What is an ecosystem?. System = regularly interacting and interdependent components forming a unified whole Ecosystem = an ecological system; = a community and its physical environment treated together as a functional system. OR, MORE SIMPLY.

Chapter 3. Ecology, ecosystems and food webs. Ecology. Groupings Organism – single living thing Species – several of same type of organism Population – several of same species interacting Community – several populations interacting in a certain area

Ecosystem. F.6 geography . Biosphere. The biosphere is made up of the living organisms of the earth , and their environments Ecology - Ecology is the study of the relationship between organisms and their environment . The Ecosystem and the food chain .

Ecosystems: Basic Concepts. NRM Class 6. What we will learn?. What is meant by an ecosystem The biotic and abiotic community Food chains, trophic levels, ecological pyramid Water and carbon cycles (skip) Benefits from ecosystem services. Some definitions.

Ecosystems. Reading: Freeman Chapter 54. An ecosystem is the unit composed of all the living things in a single place at a given time, in addition to , the important non-living components of the system.

Environmental Science: Toward a Sustainable Future Richard T. Wright. Chapter 2. Ecosystems: What They Are PPT by Clark E. Adams. The Organization of Ecosystems. A description of ecosystems The structure of ecosystems The relationship between ecosystems and biomes

Chapter 28. Energy Flow and Nutrient Cycling in Ecosystems. 0. How Do Nutrients and Energy Move Through Ecosystems?. All ecosystems consist of two components Biotic - living organisms in a given area —bacteria , fungi, protists , plants, and animals

Ecological Pyramids. Energy Loss in Ecosystems I. Energy flow through an ecosystem is based on the laws of thermodynamics (physics) First Law : Energy cannot be created or destroyed, it can only change forms

Species – a group of similar organisms whose members interbreed and produce viable offspring. Population – members of the same species that live together in the same area at the same time.

Stewardship of Soil Ecosystem Services. Howard Ferris Department of Nematology University of California, Davis November, 2010. Carbon is respired by all organisms in the food web The amounts of Carbon and Energy available limit the size and activity of the web. Carbon and energy transfer.

Chapter 51. Ecosystems. Ecosystems. Population: all the individuals of a certain species that live in a particular area Community: all the different species that interact together within a particular area