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Teacher notes. Students should take notes from slides 1-25
Teacher notes. Students should take notes from slides 1-25

... Create a line graph that shows the Population Growth of bacteria over a 3 hour and 20 minute period. Assume that the population starts with 1 bacteria and there are unlimited resources. ...
ch4BioRoche14
ch4BioRoche14

... then emitted in a different form. Since Earth is much cooler than the Sun, it emits weaker radiation with longer wavelengths, in the infrared range. Some of this infrared radiation passes through the atmosphere unimpeded, but the majority is absorbed by GHGs and then reemitted in all directions-towa ...
no fungi
no fungi

... * Animals lack digestive enzymes for cellulose and lignin * Plants often have "anti-grazing" defenses * Land plant material is poor in nutrients compared to animal tissue * This results in lower consumption of primary productivity by herbivores on land than by herbivores in aquatic systems ...
teacher - Houston ISD
teacher - Houston ISD

... can change populations and species diversity 12E Describe the flow of matter through the carbon, nitrogen cycles and explain consequences of cycle disruptions ...
Higher Prelim Checklist
Higher Prelim Checklist

... I can describe how to measure related abiotic factors and their effects on the frequency and distribution of organisms in the context of one aquatic and one terrestrial ecosystem ...
Principles of Ecology
Principles of Ecology

... Rephrase mutualism, commensalism, and parasitism in your own words. Provide an example of each term. 1. mutualism: Certain types of bacteria in our intestines help digest our food. ...
environment test
environment test

... 90. Minamata disease was caused by pollution of water by a) mercury b) lead c) tin d) methyl iso cyanate 91. BOD stands for a) biotic oxidation demand b) biological oxidation demand c) biological oxygen demand d)biochemical oxygen demand 92. A river with high BOD value is a) highly polluted b) highl ...
A-3
A-3

... (IUCN) compared the death toll from two villages in Sri Lanka that were hit by the devastating giant waves. Two people died in the settlement with dense mangrove and scrub forest, while up to 6,000 people died in the village without similar vegetation. Mangroves have very similar functions as seagra ...
2.3 Effect of Bioaccumulation on Ecosystems
2.3 Effect of Bioaccumulation on Ecosystems

... Chemicals like PCBs and DDT & other insecticides are called persistent organic pollutants (POPs).  POPs contain carbon, & remain in water & soil for many years (like all organic comp)  DDT, even at low levels (5 ppm) causes nervous, immune & reproductive system disorders in animals.  ppm = parts ...
Ecological Succession Worksheet
Ecological Succession Worksheet

... 5. Some amphibians and crayfish can withstand periods of dryness by burying themselves in mud. In which pond(s) would they survive? 6. Dragonfly nymphs spend their early stages clinging to submerged plants. Then, they climb to the surface, shed their skins, and fly away as dragonflies. Which pond is ...
Topic 7 Habitats and Sampling Learning Objectives 7.1.1
Topic 7 Habitats and Sampling Learning Objectives 7.1.1

...  Know that a stable community is one where all the species and environmental factors are in balance so that population sizes remain fairly constant. Examples include tropical rainforests and ancient oak woodlands.  Be able to record first-hand observations of organisms. 7.1.2 Abiotic factors Stude ...
FACTS (Forage fish interactions) project
FACTS (Forage fish interactions) project

... The methods have a combination of ecosystem models, of process studies aimed at feeding into the models, of economical models, and of data-analysis of existing data sources. The project covers four ecosystems in detail; Norwegian-Barents Sea, Baltic Sea, North Sea and Bay of Biscay. FACTS has brough ...
Urban Development, Biodiversity and Ecosystems
Urban Development, Biodiversity and Ecosystems

... areas, who have fewer resources to adapt to changes, and who depend to a large extent on local ecosystem service for their livelihoods and well-being. Urbanisation is an inevitable trend, and the economic development that accompanies urbanisation can have major negative implications and impacts. How ...
The Indian Ocean Tuna Commission (IOTC), Convinced that the
The Indian Ocean Tuna Commission (IOTC), Convinced that the

... Convinced that the proper management of all marine resources should be based on scientific finding and on the principle of sustainable use as reflected in the UN Convention on the Law of the Sea, 1982, the Kyoto Declaration and FAO's International Plans of Action and Code of Conduct for Responsible ...
Study Guide for Exam
Study Guide for Exam

... 58. Give two examples of how carbon dioxide can be released during the carbon cycle? Burning of fossil fuels, respiration of organisms, eruptions of volcanoes, weathering of limestone 59. Name 2 ways that nitrogen in the atmosphere can be “fixed” or changed into a form that is usable. Lightning or n ...
ecology-notes-and
ecology-notes-and

... live in a particular area, along with their nonliving surroundings. The levels of an ecosystem start with – A single organism which belongs to a population that includes other members of its species. The population belongs to a community of different species. The community and abiotic factors togeth ...
Ecological Succession - Dayton Independent School District
Ecological Succession - Dayton Independent School District

... Definition: • Natural, gradual changes in the types of species that live in an area; can be primary or secondary • The gradual replacement of one plant community by another through natural processes over time ...
Food Webbing Activity
Food Webbing Activity

... Select two of your food chains, and identify the producer and three levels of consumers. Identify three organisms that are at the top of their food chains. What is the technical term for these top consumers? Speculate about what would happen if all of the primary consumers in the ecosystem became ex ...
INTRODUCTION
INTRODUCTION

...  Total soil depth and depth of all major soil horizons show significant increase from pioneer community.  In addition, organic content, moisture, and N concentrations all increased.  Physical and biological systems are inseparable. ...
CHAPTER 15
CHAPTER 15

... Sunlight, temperature, air, water and the soil are among the most important abiotic environmental factors. However, it is not only these apparently non-living factors that influence the life on living organisms in a community. Populations that live in the same habitat are in a web of relationships t ...
Nature of Life Study Guide
Nature of Life Study Guide

... o Compare how organic compounds are built and broken down o Explain the role of ATP in cellular activities Enzymes (section 3.2) o Know the structure and function of enzymes o Know how enzymes are affected by changing conditions in their environment. o Explain the effect of a catalyst on activation ...
Sandy, Standard Assessment-Ecosystems and
Sandy, Standard Assessment-Ecosystems and

... A. are free-floating organisms B. are unicellular C. live only in saltwater environments D. are fed on by zooplankton 6. Ecologists group Earth’s diverse environments into: A. Niches B. Biomes C. Classes D. Lands 7. An organism’s _________________ is described as the ability to survive and reproduce ...
food chain
food chain

... and store it in food • Primary Consumers (herbivores) - Animals that receive their energy directly from plants • Secondary Consumers (carnivores) Consumers that feed on primary consumers • Energy flows from the sun to the producer, then to the primary consumer, then to the secondary consumer, third ...
Chapters • Lesson 17
Chapters • Lesson 17

... between members of differing species. Predation is a feeding relationship in which one animal kills and eats another. Parasitism is a symbiotic relationship in which one animal benefits at the expense of another. All three of these limiting factors can have a greater effect in a dense population in ...
Chapter 7 Climate and terrestrial biodiversity
Chapter 7 Climate and terrestrial biodiversity

... • Poor mining, logging, and grazing practices • Water and air pollution • Unsustainable commercial and residential development • Community meetings led to • Weed-pulling parties • Nesting structures for waterfowl • Developed sustainable grazing systems • What Can You Do? Sustaining Terrestrial Biodi ...
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Ecosystem



An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water and mineral soil), interacting as a system. These biotic and abiotic components are regarded as linked together through nutrient cycles and energy flows. As ecosystems are defined by the network of interactions among organisms, and between organisms and their environment, they can be of any size but usually encompass specific, limited spaces (although some scientists say that the entire planet is an ecosystem).Energy, water, nitrogen and soil minerals are other essential abiotic components of an ecosystem. The energy that flows through ecosystems is obtained primarily from the sun. It generally enters the system through photosynthesis, a process that also captures carbon from the atmosphere. By feeding on plants and on one another, animals play an important role in the movement of matter and energy through the system. They also influence the quantity of plant and microbial biomass present. By breaking down dead organic matter, decomposers release carbon back to the atmosphere and facilitate nutrient cycling by converting nutrients stored in dead biomass back to a form that can be readily used by plants and other microbes.Ecosystems are controlled both by external and internal factors. External factors such as climate, the parent material which forms the soil and topography, control the overall structure of an ecosystem and the way things work within it, but are not themselves influenced by the ecosystem. Other external factors include time and potential biota. Ecosystems are dynamic entities—invariably, they are subject to periodic disturbances and are in the process of recovering from some past disturbance. Ecosystems in similar environments that are located in different parts of the world can have very different characteristics simply because they contain different species. The introduction of non-native species can cause substantial shifts in ecosystem function. Internal factors not only control ecosystem processes but are also controlled by them and are often subject to feedback loops. While the resource inputs are generally controlled by external processes like climate and parent material, the availability of these resources within the ecosystem is controlled by internal factors like decomposition, root competition or shading. Other internal factors include disturbance, succession and the types of species present. Although humans exist and operate within ecosystems, their cumulative effects are large enough to influence external factors like climate.Biodiversity affects ecosystem function, as do the processes of disturbance and succession. Ecosystems provide a variety of goods and services upon which people depend; the principles of ecosystem management suggest that rather than managing individual species, natural resources should be managed at the level of the ecosystem itself. Classifying ecosystems into ecologically homogeneous units is an important step towards effective ecosystem management, but there is no single, agreed-upon way to do this.
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