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Keystone species is a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.

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Commensalism is an association between two organisms in which one benefits and the other derives neither benefit nor harm. For example birds that live in the hollows of trees are commensal

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Symbolic Relationships Among Organisms: List 3 competition 

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Symbolic Relationships Among Organisms: List 3 competition 

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Resources are components of the environment that are required for survival and reproduction such as food, water, shelter, light, and territory.

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Symbolic Relationships Among Organisms: Competition 

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Symbolic Relationships Among Organisms: Competition 

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Competition is the activity or condition of competing. For example Predators of different species might compete for the same prey.

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Symbolic Relationships Among Organisms: Predation 

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Symbolic Relationships Among Organisms: Predation 

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Predation is the preying of one animal on others. For example is when one animal consumes another.

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Disease Can Disrupt Ecosystems : Influenza 

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Disease Can Disrupt Ecosystems : Influenza 

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Influenza is a highly contagious viral infection of the respiratory passages causing fever, severe aching, and catarrh, and often occurring in epidemics.

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Symbolic Relationships Among Organisms: Parasitism 

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Symbolic Relationships Among Organisms: Parasitism 

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Parasitism is the practice of living as a parasite in or on another organism. For example is fleas or ticks that live on dogs and cats are parasites.

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Galveston County Master Gardener's Home - Galveston County Master Gardeners

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Winners of the 2023 Galveston County Pecan Show; click here! Galveston County Master Gardener Association (GCMGA) is a voluntary, nonprofit, educational, literary and charitable association organized to support Texas A&M... Read More →

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Symbolic Relationships Among Organisms: Mutualism 

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Symbolic Relationships Among Organisms: Mutualism 

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Mutualism is the doctrine that mutual dependence is necessary to social well-being. For example a  oxpeckers get food and the beasts get pest control.

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Disease Can Disrupt Ecosystems : Tuberculosis

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Disease Can Disrupt Ecosystems : Tuberculosis

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Tuberculosis is an infectious bacterial disease characterized by the growth of nodules (tubercles) in the tissues, especially the lungs.

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Disease Can Disrupt Ecosystems : Pfiesteria 

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Disease Can Disrupt Ecosystems : Pfiesteria 

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Pfiesteria is a genus of dinoflagellates including one found in waters especially along the middle and southern Atlantic coast of the United States that produces a toxin which causes skin lesions in fish.

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Disease Can Disrupt Ecosystems : Dutch Elm Disease 

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Disease Can Disrupt Ecosystems : Dutch Elm Disease 

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Dutch Elm Disease is a fungal disease of elm trees that is spread by elm bark beetles. A virulent strain of the fungus that arose in North America in the early 20th century has destroyed the majority of American elms in many areas.

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AIDS is disease in which there is a severe loss of the body's cellular immunity, greatly lowering the resistance to infection and malignancy.

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Carrying Capacity of Populations: Limited factor 

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Carrying Capacity of Populations: Limited factor 

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water

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* Migration is when animals travel relatively short distances to find food or more favorable living or breeding conditions. For example is geese flying south for the winter.
* Excretion is the process by which animals rid themselves of waste products and of the nitrogenous by products of metabolism. For example the process of expelling waste matter, or the waste matter expelled by this process.
* Camouflage is an adaptation that helps an organism blend in with its surroundings.For example animals use coloring, texture and markings to blend into their environments.
* Unique movement with animals locomotion, in ethology, is any of a variety of methods that animals use to move from one place to another. For example a rabbit hopping and running to get away from whatever is about to attack it.

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Carrying Capacity of Populations: Limited factor 

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Carrying Capacity of Populations: Limited factor 

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habits

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Carrying Capacity of Populations: Limited factor  

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Carrying Capacity of Populations: Limited factor  

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food

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Estivation is a prolonged dormancy of an animal during a hot or dry period

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*Animals identify the territory by sniffing, marking it with their territory and scent rubbing.
*Animal defend their territory by fighting with other animals, spraying urine, and rubbing scent glands around the borders of the territory.
*A niche is an organisms functional role that it plays within an ecosystem.
For example: Wolves help to keep the prey animals from becoming too populated and a white oak tree grows a dominate force canopy turning sunlight into food.

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In this image the birds are utilizing their wings to attract one another and they are displaying an attempt to engage in communicating with each other.
* Pheromones are chemicals capable of acting like hormones outside the body of the secreting individual.
* Animals send out pheromones in hopes to attract other animals of the opposite sex and is used for matting

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Carrying Capacity of Populations: Limited factor 

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Carrying Capacity of Populations: Limited factor 

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space

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Hibernation is a state of minimal activity and metabolic depression mostly occurring in winter months

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* Carrying capacity the number of people, other living organisms, or crops that a region can support without environmental degradation.
* Limiting factors is food and water supply, habitat space, and competition with other species are some of the limiting factors affecting the carrying capacity.

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* Instinct is typically a fixed patterns of behavior in animals in response to certain stimuli. For example a spider spinning a web
* Learned behaviors is something that organisms develops as a result and can be preformed with any prior experience or training. For example teaching a dog how to roll over by giving a treat.
* Imprinting is a form of learning which a very young animal fixes its attention on the first object with which it has visual auditory or tactical thereafter follows that object. An example of imprinting is baby ducks following the momma duck.
* Classical conditioning is a learning process that occurs when two stimuli are repeatedly paired. For example when trying to train  animals with a bell or whistle.
*   Trail or error is a problem solving methods in which multiple attempts are made reach a solution. For example moving a large objet through a large opening and trying to figure out how to get through without getting stuck.
* Habituation is a decrease in response to after a stimulus repeated presentation. For example when organism cautiously repeats a certain behavior and eventually become used to that type of behavior.