Chapter 6: Populations and Community Ecology
... The different growth models used to explain changes in population size are exponential and logistic. Some populations experience cycles of overshoots and die-offs that oscillate around the carrying capacity. Predators play an important role in limiting population growth. The two reproductive strateg ...
... The different growth models used to explain changes in population size are exponential and logistic. Some populations experience cycles of overshoots and die-offs that oscillate around the carrying capacity. Predators play an important role in limiting population growth. The two reproductive strateg ...
Commensalism, Mutualism, Parasitism
... agree, one benefits, they both do not benefit, etc.) Each student should have some prior knowledge about examples of species interactions (Types of predators, prey, etc.) NGSS Standard: HS-LS2-6: “Evaluate the claims, evidence, and reasoning that the complex interactions in ecosystems maintain relat ...
... agree, one benefits, they both do not benefit, etc.) Each student should have some prior knowledge about examples of species interactions (Types of predators, prey, etc.) NGSS Standard: HS-LS2-6: “Evaluate the claims, evidence, and reasoning that the complex interactions in ecosystems maintain relat ...
Species Interactions: Competition
... communities fossil fuels are accumulating at a negligible rate compared to the amount of photosynthesis occurring world-wide. If decomposing plant material is not accumulated, then it is being used up. Decomposers, as a trophic level, are limited by their food resources. If that's true, then species ...
... communities fossil fuels are accumulating at a negligible rate compared to the amount of photosynthesis occurring world-wide. If decomposing plant material is not accumulated, then it is being used up. Decomposers, as a trophic level, are limited by their food resources. If that's true, then species ...
Ecology Review from 7th Grade PowerPoint
... • An ecosystem truly is an “ecological system” consisting of many different parts with different members, each one fulfilling its own role. • An organism’s role can be thought of as a “job description” and is often referred to as its ecological niche (e.g. herbivore, top ...
... • An ecosystem truly is an “ecological system” consisting of many different parts with different members, each one fulfilling its own role. • An organism’s role can be thought of as a “job description” and is often referred to as its ecological niche (e.g. herbivore, top ...
Supporting Native Fish - Home Enviro Data SA
... modification and destruction of aquatic habitat have led to a decline in the distribution and abundance of native fish since European settlement. Alarmingly, around 8% of Australia's freshwater fishes are threatened with extinction, and 25% have declined significantly in population or only occur in ...
... modification and destruction of aquatic habitat have led to a decline in the distribution and abundance of native fish since European settlement. Alarmingly, around 8% of Australia's freshwater fishes are threatened with extinction, and 25% have declined significantly in population or only occur in ...
Chapter 38
... The secondary production of an ecosystem is the amount of chemical energy in consumers’ food that is converted to their own new biomass during a given period of time. ...
... The secondary production of an ecosystem is the amount of chemical energy in consumers’ food that is converted to their own new biomass during a given period of time. ...
2013 Training Handout
... primary producers at the base and the other levels above Most of the food eaten by organisms is converted to biomass, or used to maintain metabolic functions, or lost as heat, only about 10% of the energy makes it to the next level This massive energy loss between trophic levels explains why food ...
... primary producers at the base and the other levels above Most of the food eaten by organisms is converted to biomass, or used to maintain metabolic functions, or lost as heat, only about 10% of the energy makes it to the next level This massive energy loss between trophic levels explains why food ...
APES - Lemon Bay High School
... • Food Web: much more realistic representation of how energy moves thru systems- ...
... • Food Web: much more realistic representation of how energy moves thru systems- ...
Food Chains
... ↓ in population of Sea urchins and smaller herbivores fishes/invertebrates (sea stars increased predation pressure on these species due to the removal of one food source) ↓ in population of sea stars, larger crabs and larger fish/octopi (sea otter increased predation pressure on these species due to ...
... ↓ in population of Sea urchins and smaller herbivores fishes/invertebrates (sea stars increased predation pressure on these species due to the removal of one food source) ↓ in population of sea stars, larger crabs and larger fish/octopi (sea otter increased predation pressure on these species due to ...
Primary Succession
... These organisms produce as many offspring as possible. Invest little in each offspring. In good conditions, populations explode Good strategy for unpredictable environments ...
... These organisms produce as many offspring as possible. Invest little in each offspring. In good conditions, populations explode Good strategy for unpredictable environments ...
Populations
... Logistic growth is population growth that starts with a minimum number of individuals and reaches a maximum depending on the carrying capacity of the habitat. When a population is small, the growth rate is fast because there are plenty of resources. As the population approaches the carrying c ...
... Logistic growth is population growth that starts with a minimum number of individuals and reaches a maximum depending on the carrying capacity of the habitat. When a population is small, the growth rate is fast because there are plenty of resources. As the population approaches the carrying c ...
Students will be introduced to the effect an invasive species has on
... Each fish starts off with three lives represented by bingo chips. At the end of the round each fish needs 5 pom-poms to survive the round For every three pom-poms beyond the first five the fish produces one offspring which counts as an extra life. i.e. after round one the perch has collected 9 pom-p ...
... Each fish starts off with three lives represented by bingo chips. At the end of the round each fish needs 5 pom-poms to survive the round For every three pom-poms beyond the first five the fish produces one offspring which counts as an extra life. i.e. after round one the perch has collected 9 pom-p ...
Biology 1409 Class Notes - Ecology Ch 34, 37
... temperature, moisture available, availability of nutrients, etc. - secondary productivity - rate (biomass per time and area) that consumers and decomposers (the heterotrophs) convert biomass (their food) into new biomass (their growth and reproduction). - animals are about 10% efficient at secondar ...
... temperature, moisture available, availability of nutrients, etc. - secondary productivity - rate (biomass per time and area) that consumers and decomposers (the heterotrophs) convert biomass (their food) into new biomass (their growth and reproduction). - animals are about 10% efficient at secondar ...
Invasive Species Game
... Each fish starts off with three lives represented by bingo chips. At the end of the round each fish needs 5 pom-poms to survive the round For every three pom-poms beyond the first five the fish produces one offspring which counts as an extra life. i.e. after round one the perch has collected 9 pom-p ...
... Each fish starts off with three lives represented by bingo chips. At the end of the round each fish needs 5 pom-poms to survive the round For every three pom-poms beyond the first five the fish produces one offspring which counts as an extra life. i.e. after round one the perch has collected 9 pom-p ...
Habitat loss - College of Forestry, University of Guangxi
... One local scale human influence on ecosystems is that human activity Like logging can influence what much leaching occurs, and thus How much of the nutrients of an ecosystem are lost (flow out with water). ...
... One local scale human influence on ecosystems is that human activity Like logging can influence what much leaching occurs, and thus How much of the nutrients of an ecosystem are lost (flow out with water). ...
6_comm ecology overview
... a) Species occupying the same niche cannot coexist. b) Exploitation - indirect competition b) The more similar the species (the greater the niche overlap ), the greater the likelihood of competitive exclusion, leading to local extinction of one species. ...
... a) Species occupying the same niche cannot coexist. b) Exploitation - indirect competition b) The more similar the species (the greater the niche overlap ), the greater the likelihood of competitive exclusion, leading to local extinction of one species. ...
Climate Change Task Force Natural Systems
... 2. Analyze impacts on coastal ecosystems from climate change. Evaluate strategies to minimize stressors and pollutants. 3. Identify values of natural areas and restore natural areas. 4. Develop a “Vital Signs” monitoring program, following the model of the National Park Service, to serve as a mul ...
... 2. Analyze impacts on coastal ecosystems from climate change. Evaluate strategies to minimize stressors and pollutants. 3. Identify values of natural areas and restore natural areas. 4. Develop a “Vital Signs” monitoring program, following the model of the National Park Service, to serve as a mul ...
- The Art of Flick Ford
... Loach’s fascinating and often clownish behavior make it well worth the expense and time. Hobbyist breeding of this species is unreported at this time. Though Clown Loaches are not listed on the IUCN Red List, floodplain swamp forests where they spawn are undergoing reclamation for land use, so much ...
... Loach’s fascinating and often clownish behavior make it well worth the expense and time. Hobbyist breeding of this species is unreported at this time. Though Clown Loaches are not listed on the IUCN Red List, floodplain swamp forests where they spawn are undergoing reclamation for land use, so much ...
The Economics of Marine Resources: Ecological
... Course Description: Natural resources are central in our lives. As human population grows and people aspire to better living standards, there are more people chasing fewer resources. All of us are affected by the availability of water, minerals, forests, oil, coal and many other natural resources, i ...
... Course Description: Natural resources are central in our lives. As human population grows and people aspire to better living standards, there are more people chasing fewer resources. All of us are affected by the availability of water, minerals, forests, oil, coal and many other natural resources, i ...
2012 Training Handout - Overview
... primary producers at the base and the other levels above Most of the food eaten by organisms is converted to biomass, or used to maintain metabolic functions, or lost as heat, only about 10% of the energy makes it to the next level This massive energy loss between trophic levels explains why food ...
... primary producers at the base and the other levels above Most of the food eaten by organisms is converted to biomass, or used to maintain metabolic functions, or lost as heat, only about 10% of the energy makes it to the next level This massive energy loss between trophic levels explains why food ...
Food Web Game
... away and some types of trees reseed well after a fire. The teacher defines what happens and who is affected; the students then reveal what would happen. New species could also move into the area at any time disrupting the web. 7. Discuss what would happen if all of the predators were removed. Some ...
... away and some types of trees reseed well after a fire. The teacher defines what happens and who is affected; the students then reveal what would happen. New species could also move into the area at any time disrupting the web. 7. Discuss what would happen if all of the predators were removed. Some ...
Keystone Species Reading and Qstns
... “The keystone species concept was coined, in 1969, by the zoologist Robert T. Paine, professor emeritus of the University of Washington, to explain the relationship between Pisaster ochraceus, a species of starfish, and Mytilus californianus, a species of mussel.”[1] What is a Keystone Species? A ke ...
... “The keystone species concept was coined, in 1969, by the zoologist Robert T. Paine, professor emeritus of the University of Washington, to explain the relationship between Pisaster ochraceus, a species of starfish, and Mytilus californianus, a species of mussel.”[1] What is a Keystone Species? A ke ...
Overexploitation
Overexploitation, also called overharvesting, refers to harvesting a renewable resource to the point of diminishing returns. Sustained overexploitation can lead to the destruction of the resource. The term applies to natural resources such as: wild medicinal plants, grazing pastures, game animals, fish stocks, forests, and water aquifers.In ecology, overexploitation describes one of the five main activities threatening global biodiversity. Ecologists use the term to describe populations that are harvested at a rate that is unsustainable, given their natural rates of mortality and capacities for reproduction. This can result in extinction at the population level and even extinction of whole species. In conservation biology the term is usually used in the context of human economic activity that involves the taking of biological resources, or organisms, in larger numbers than their populations can withstand. The term is also used and defined somewhat differently in fisheries, hydrology and natural resource management.Overexploitation can lead to resource destruction, including extinctions. However it is also possible for overexploitation to be sustainable, as discussed below in the section on fisheries. In the context of fishing, the term overfishing can be used instead of overexploitation, as can overgrazing in stock management, overlogging in forest management, overdrafting in aquifer management, and endangered species in species monitoring. Overexploitation is not an activity limited to humans. Introduced predators and herbivores, for example, can overexploit native flora and fauna.