Biotic vs. Abiotic Factors - Weebly



Name:Period:What Shapes an Ecosystem?Biotic vs. Abiotic FactorsWhat is the definition of a biotic factor?______________________________________________________________________________What is the definition of an abiotic factor?4838700352996500______________________________________________________________________________Enter the items from the following list into a Venn diagram.5105400457200000-47625413385000In the center, place what contains both biotic and abiotic factors.? whale? sand? tree? hair? mushroom? clouds? rocks? ocean? water? snail? dirt? coral? desert? Athlete’s foot? oxygen? paper? temperature? steak? tundra? grass? glass? mold? ants? predator08361045005238750837501500-4762550622600027717755562600Both00Both36195015257800Abiotic00Abiotic18478505286375Biotic00Biotic2971165139065000-13970139065000List the biotic and abiotic factors in both pictures. What other factors may relate but cannot be seen in the pictures?Biotic FactorsAbiotic FactorsAll biotic and abiotic factors are interrelated. In nature, you will find that if one factor is changed or is removed, it impacts the availability of other resources within the system. Knowing this, give an example of what might happen given the following situations.In the empty spaces, place either a B for Biotic or an A for Abiotic to identify what the object is.1. All of the rocks (_____) are removed from a desert ecosystem. What would happen to the population of rock dwelling lizards (_____) and in turn the animals that eat them?__________________________________________________________________________________________________________________________________________________________________________2. A ten mile area of trees (_____) is removed from the tropical rainforest. How will this affect the amount of oxygen (_____) in the area?__________________________________________________________________________________________________________________________________________________________________________Ecological NicheAn?ecological niche?is the role and position a species has in its environment - how it meets its needs for food and shelter, how it survives, and how it reproduces. A species' niche includes all of its interactions with the biotic?and?abiotic?factors of its environment. It is advantageous for a species to occupy a unique niche in an ecosystem, because it reduces the amount of competition for resources that species will encounter.Every living thing on Earth has a role to play in its environment. In fact, you are filling a niche right now as you read this lesson. Your niche also includes where and how you obtain food and all of the things you do in order to survive.Describe your niche. Consider biotic (family, the “living things” you eat, other living things in your home…) and abiotic factors (location, transportation, neighborhood, community, resources you receive…). How is your niche different from other family members? ______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________Community InteractionsTrue or False_____ 1. The group of trees that a monkey lives in is its habitat._____ 2. Fungi need a moist, humid climate in which to grow. This need for moisture is part of their niche._____ 3. When two populations try to share the same niche or use the same resource, competition occurs and one of the populations will go extinct._____ 4. If two organisms are competing, that means predation is occurring._____ 5. If you get a tapeworm and it ends up living in your intestines, feeding off of every meal you eat, that means you and your tapeworm have a parasitic relationship._____ 6. An example of commensalism would be you and the bacteria living in your intestines, because you give them a home, and they break down food and synthesize vitamins for you._____ 7. Mutualism is where both organisms in the relationship benefit from the relationship.Define each of these in 5 words or less, then give an example in nature and an two examples in your family, community, or in society.Intraspecific competitionDef:Nature:Your example 1:Example 2:Interspecific competitionDef:Nature:Your example 1:Example 2:PredationDef:Nature:Your example 1:Example 2:SymbiosisDef:Nature:Your example 1:Example 2:MutualismDef:Nature:Your example 1:Example 2:CommensalismDef:Nature:Your example 1:Example 2:ParasitismDef:Nature:Your example 1:Example 2:Ecological Succession1. Any change in plant communities over time is called a(n) _________________________.2. A common pioneer organism in a succession is the ___________________________.3. The final stable state of a succession is called the ___________________________ community.4. The first organism in a succession is called the ____________________________.5. Several years after some ground was cleared, grasses began to grow in an area. After 10 years, small bushes replaced the grasses. This pattern of plant growth is known as(1.) cover cropping (2.) evolution (3.) ecological succession (4.) biological control6. Which organisms would most likely be the pioneer organisms on a newly formed volcanic island? (1.) conifers (2.) lichens (3.) deciduous trees (4.) tall grassesBase your answers to questions 7 through 9 on the chart and your knowledge of biology.StageDominant FloraANone (freshly plowed land)BAnnual grassesCVarious shrubsDBirch and cherry treesEBeech-maple forest7. Which stage represents a pioneer community? (1.) A (2.) B (3.) C (4.) D (5.) E8. The replacement of stage B by stage C and the replacement ofstage C by stage D in a particular location is known as (1.)exploitation (2.) cover cropping (3.) ecological succession (4.) punctuated equilibrium9. Which stage would best represent a climax community? (1.) A (2.) B (3.) C (4.) D (5.) E10. Starting on bare rock, what is the usual ecological succession of organisms?(1.) lichens → grasses → shrubs → trees (2.) grasses → shrubs → lichens → trees(3.) lichens → shrubs → grasses → trees (4.) shrubs → grasses → lichens → trees11. The stable stage that is established in an area as a result of the process of ecological succession is known as the (1.) pioneer organism (2.) climax community (3.) biotic stage (4.) heterotrophic communityPosition of edge of glacier 100 years agoShrubs and young treestundra grassesmossesalgae and lichensbare rockPosition of edge of glacier at present time?????—————movement of glacier————→-47625-6731012. The diagram represents a map showing different zones in an area once covered by a glacier. This diagram best represents (1.) nutritional relationships (2.) a pyramid of energy (3.) a food chain (4.) ecological successionUse the diagram below and your knowledge of succession to answer questions 13 through 15.50196751381125IVIV35528251390650IIIIII20764501400175IIII6953251400175I00IFour Stages of a Biological Process13. What would most likely be the predominant life-form found in stage 1? (1.) ferns (2.) pioneer species (3.) trees (4.) mushrooms14. Stage IV will persist until it is altered by (1.) a major change in an abiotic factor (2.) seasonal dieback of vegetation (3.) the reappearance of lichens and mosses (4.) the growth in diameter of the trees15. What is a major limiting biotic factor for animal succession in each stage? (1.) plant species (2.) sunlight (3.) soil minerals (4.) moisture16. In a pond, which change would most likely lead to terrestrial succession? (1.) a decrease in the number of suspended particles in the pond water(2.) an increase in current velocity of the pond water(3.) an increase in sediment, fallen leaves, and tree limbs accumulating on the bottom of the pond(4.) a decrease in the number of diverse organisms in the shallow water of the pond17. Which statement concerning the climax stage of an ecological succession is correct? (1.) It is the first community to inhabit an area. (2.) It consists entirely of plants.(3.) It persists until the environment changes. (4.) It changes rapidly. ................
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