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Community Ecology
Community Ecology

... • Multiple populations (different species) • Share same general area/space ...
Coevolution
Coevolution

... 3. Ants that did not defoliate the host plant would be able to continue nesting there. In addition, if they attacked neighboring plants of other species, the host acacia would benefit and so would the ants. 4. Ants would be predisposed to definding their nest sites. This behavior could easily be ext ...
Parasitism
Parasitism

... two organisms that are using the same limited resource. • Competition can be within the same species (intraspecific) or between different species (interspecific). • Two species share a requirement for a limited resource  reduces fitness of one or both species ...
16 Coevolution Mutualism 2009
16 Coevolution Mutualism 2009

... • Limited to a pair of species • May be rare and limited to very ...
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Lesson 5 Interations in Ecosystems

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Jeopardy

... The role of an organism in it’s habitat. ...
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Chapter 5 Review

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Patterns Of Evolution
Patterns Of Evolution

... look and function similar but do not share a common evolutionary history. These structures are called analagous. Ex. Dolphin’s fluke and a fish tail ...
environmental_studies_community_ecology_2
environmental_studies_community_ecology_2

... When two or more similar species coexist, such as these varieties of warbler, each species only uses part of the available resources. This is called resource partitioning. (species sharing resources) ...
Co-evolution and the Red Queen
Co-evolution and the Red Queen

... • Co-evolution is frequently seen in pairs of species that interact frequently or closely. Examples include herbivores and plants, pollinators and plants, predators and their prey, and parasites and their hosts • The co-evolutionary ‘arms race’ between a parasite and host is known as the Red Queen H ...
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How Species Interact with Each Other

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Natural Selection and Speciation PP

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Name Class Date Species Interactions Vocabulary Define each

... underlined word or words to make the statement true. Write your changes on the line. 1. Organisms with wide tolerance ranges, able to use a wide array of habitats or resources, are called specialists. 2. Zebra mussels have demonstrated competitive exclusion by outcompeting all the native mussels in ...
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Threatened Plants of the British Virgin Islands Poke-me-boy Acacia anegadensis

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Week 2-3 Notes File

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Pollination by desert bees Morphological, physiological and

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Study guide 3

... Unit 3: Evolution, Biodiversity and Ecology (Chapters 13-20) Below are a list of the major topics that we focused on. Other topics from the text and videos we saw could appear on the exam, but the majority of questions will focus on these topics: Micro-Evolution: -Darwin’s ideas of descent with modi ...
Coevolution Power Point
Coevolution Power Point

... tip. You remember learning in science class that some moths feed on nectar. Draw a picture of what you think a moth may look like that feeds on this plant. How might natural selection bring about the evolution of this orchid and the moth? ...
Homologous Structures Vestigial Structures Co
Homologous Structures Vestigial Structures Co

... • When two species affect each other’s evolution • Ex: Acacia ants and acacia trees ...
Population Ecology
Population Ecology

... B. Health Conditions - crowding and disease. C. Predation by another species. 1. Predator-prey relationships a. __________________ - organism killed and eaten by another organism. b. __________________ - organism that eats all or part of another organism after killing it. D. ______________________ 1 ...
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An EMu based electronic monograph of the Brazil nut

... largest seed in can of mixed nuts ...
Dec 11 - University of San Diego
Dec 11 - University of San Diego

... Coevolution has affected herbivore evolution ...
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Coevolution



In biology, coevolution is ""the change of a biological object triggered by the change of a related object"". In other words, when changes in at least two species' genetic compositions reciprocally affect each other’s evolution, coevolution has occurred.There is evidence for coevolution at the level of populations and species. Charles Darwin briefly described the concept of coevolution in On the Origin of Species (1859) and developed it in detail in Fertilisation of Orchids (1862). It is likely that viruses and their hosts coevolve in various scenarios.However, there is little evidence of coevolution driving large-scale changes in Earth's history, since abiotic factors such as mass extinction and expansion into ecospaces seem to guide the shifts in the abundance of major groups. One proposed specific example was the evolution of high-crowned teeth in grazers when grasslands spread through North America - long held up as an example of coevolution. We now know that these events happened independently.Coevolution can occur at many biological levels: it can be as microscopic as correlated mutations between amino acids in a protein or as macroscopic as covarying traits between different species in an environment. Each party in a coevolutionary relationship exerts selective pressures on the other, thereby affecting each other's evolution. Coevolution of different species includes the evolution of a host species and its parasites (host–parasite coevolution), and examples of mutualism evolving through time. Evolution in response to abiotic factors, such as climate change, is not biological coevolution (since climate is not alive and does not undergo biological evolution).The general conclusion is that coevolution may be responsible for much of the genetic diversity seen in normal populations including: blood-plasma polymorphism, protein polymorphism, histocompatibility systems, etc.The parasite/host relationship probably drove the prevalence of sexual reproduction over the more efficient asexual reproduction. It seems that when a parasite infects a host, sexual reproduction affords a better chance of developing resistance (through variation in the next generation), giving sexual reproduction viability for fitness not seen in the asexual reproduction, which produces another generation of the organism susceptible to infection by the same parasite.Coevolution is primarily a biological concept, but researchers have applied it by analogy to fields such as computer science, sociology / international political economy and astronomy.
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