PPT-Parasitism (ii):

Transmission and virulence CfE Advanced Higher Biology Unit 2 Organisms and Evolution SQA mandatory key information Transmission is the spread of a parasite to a host Virulence is the potential of a parasite to cause harm to a host A higher rate of transmission is linked to higher virulence Factors that increase transmission rates include the overcrowding of hosts at high density or mechanisms that allow the parasite to spread even when infected hosts are incapacitated Vectors and waterborne dispersal stages are examples of the latter . Here we review experiments that suggest a co evolutionary process between the great spotted cuckoo Clamator glandarius and its magpie Pica pica host We focus on different stages of establishment of the rela tionship from cuckoos selecting individ 3 Macroparasites:platyhelminth worms (tapeworms, trematodes)(intestinal) nematodeslice, fleas, ticks, mites, fungi1.Directly transmitted from host to host 2.Indirectly transmitted via some other speci Can you think of examples of relationships where both people/ organisms benefit?. Can you think of examples of relationships where one organism benefits while the other is harmed?. Symbiotic Relationships. An organisms role in its environment…. An organisms . habitat. is the area where it lives.. In any environment, every species fills a unique niche.. A . niche. includes the conditions and resources a species’ needs for survival and how it obtains these resources.. Define . sym. :. _____________________ . Define . bio. :. _____________________. Define . symbiosis. : __________________________________. With, together. Life. Symbiosis means life together.. The different forms of symbiosis describe the relationships between organisms that live together.. Predation. The capturing of prey as a . means of maintaining life. One organism benefits . One organism is killed. Competition. Competition. – A rivalry between organisms for the same resources; The fitness of one of the organisms is lowered by the presence of another.. 3 Macroparasites:platyhelminth worms (tapeworms, trematodes)(intestinal) nematodeslice, fleas, ticks, mites, fungi1.Directly transmitted from host to host 2.Indirectly transmitted via some other speci Affect . Mayfly Drift Behavior and. Susceptibility to Stonefly Predation. Jasmine Hamilton, CSU Sacramento. Kara Cromwell & Bobbi Peckarsky, UW Madison. Biological Consequences. Photos: Coalcreek.org. th. 2016. Shape of the Day. . 10 – 15 minutes. – Run through lecture at breakneck speed. . Rest of Block. – Organism Research . in . Library . Learning Objectives . . Define symbiosis . Define . (. Homoptera. : . Psyllidae. ) Instar on Level of Parasitism, Sex Ratio, and Size of . Tamarixia radiata. (Hymenoptera: Eulophidae. ). Christopher . Kerr. Entomology and Nematology Department. University of Florida. Parasite. A parasite lives on or in a host, getting food . from, . or at the expense . of, . its . host . Parasitoid relationship. When a parasite actually kills its host. Parasitoid relationship. When a parasite actually kills its host. Abiotic Factors. Topography. Temperature. Water. Abiotic Factors. Soil Content. Sunlight. Communities and Populations. Communities . Assemblage of different populations that live together in a defined area.. According to Elton, the union of parasite and host is usually an elaborate compromise between extracting sufficient nourishment to maintain and propagate itself and not impairing too much the vitality or reducing the number of its host which is providing it with a home and free ride.. Science. Challenge answer. Investigate and make note of other examples of commensalism in animals and plants and why they are considered commensal. . Tree frogs use plants as protection.. Plants that live on other plants and do not harm them..