AP Biology F10 West 7 - l’ruiator’Prm Lab Simulation...

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Unformatted text preview: l’ruiator’Prm Lab Simulation and Owl Pellet Dissection I. R \\.M. \r. Fm imnntcnmi Suit-nee [.1th (Wolf-‘8)" 125011117) 1’3 rt 1: l’rcdntori'l’rm Graphing ‘ V- "V “ i It W‘r “Quick H079“ (WNW-"H In PrQLcct WHQ. The Council for Environmental Education. 1992. L Ll.:| ~KL k .¢ __ ,__.__....._._ i 7 Population of ‘ Population of Background Information ‘ rune elapsed E rodents : iLCOiog} 25 the stud). of cm’imnmcnlul systems. tnore specifically the I Years (hundreds) OWIS , relationships organisms have with each other and the abiotic factors r—“"‘“H'—"""“ “fl” 20 _‘i'—"‘ 10 that make up their environment. Within this system, ecologists may i i t stud} one or more component in order to better understand the 2 55 15 * cotttplexit} ot‘ the system as a whole. On a very basic level, for I i i i instance. all organisms must have food to survive. Producers 4 tautotrophs) make their own food, while all consumers (herbivores, ‘ I l carnivores, omnivores, scavengers, detn'tivores, and decomposers) 6 l 95 60 must ingest organic matter created by other organisms. All of these ,i . are forms of exploitation, in which one organism benefits and i 3 l 55 20 another is harmed. Predators kill and eat other organisms, referred ' I to as prey. Predator/prey relationships are important in ecology ‘ 10 5 . l5 ‘ ‘ because they give insight into: life cycles, populatiou dynamics, and - r i = evolutionary changes in both predator and prey that make them more i 12 l 15 t. 10 i efficient in their roles. Thought Questions In what ways can predators become more efficient? In what ways can preys become more efficient? How do predator and prey coevolve? Directions: The data table below shows the population sizes of each species in an area over 28 years. Either draw the graph OR use excel to make the graph. Be sure to: Label your axes O 0 Include units 0 Label the series. I I Include a Title Include'a Figure Legend Analysis 1. Describe the relationship between the population of Barn Owls and rodents. (Analyze your graph here). . . . . . 9 . 2. What do you think would happen to the WI populatloi‘ if a‘LilElfde’ilf.t‘l‘3dt°§§i§°a33el§a lcfzaldfl‘et REG-é: OWIS .1 A ~ tl_‘ w‘ I; up. ELI, “q m / Iii-Lo}, t \, "ix-t 1 k 3. What are some other adaptations used by prey 3r preda ors. ’t’ M Pas-m . - > \ {xu'ps \_-- ,,‘z_a.r._:_;‘i 4. Explain how predators and prey are limiting factors for one another. How do thciy help to maintain ax“EJ n“ b 9‘ 7 CM) M at; (we w rim F strata} my H v; t - balanced eCOSyStemZ/ri "t (15”? (3‘ m.‘ (C "t ‘ \v (x a i “\' “"1 (Q . ' "*" * x l - p} '3'; «CC. Hf Q: if?!- 1 Ct“ ti 'li‘u. EM, _ f ftp. “a 1A0 3i" i grip f‘ “ IL. “ i C %.&t’ ng’ESc u M r‘t‘LJJ‘ MAC; \ r he} remains through the esophagus. The pellets are regurgitated at a rate of about one to two pellets imp. (approximately 20 hours after feeding). Imperative rials wl l’ellclslllpalr) l )isseeting tray i Dissecting probes ) Dissection Scopes t l’rey Identification Keys l'rogeglgzg l. Unwrap your owl pellet. 2. Measure the approximate length and width of your owl Pellet (in Cm)’ 3. Take the mass of your owl pellet in grams (to the nearest tenth)- 4. Make observations about the surface of your owl pellet. 5. Carefully twist the pellet. being careful not to break or lose any small bones, o. Use a probe and tweezers to pick out the bones. '7. Place all bones aside to be used later. , 8. When you think you have all the bones out. rub the remainder between Your finge’s- “you feel anythmg hard’ and break the pellet into pieces. it‘s a bone. You need them all. 9. Separate and arrange similar bones. 10. Answer data and observation questions. ll. Use the identification sheets to identify and reconstruct skeletons of the prey. 12. Properly dispose of materials. Data and Observations (Italicized questions will need to be answered using a class average). 1. Length of your owl pellet C [33 Average length a . a: and 2. Width of your owl pellet Q cm Average width 2 ‘ Q8 :l' S On? 3. Mass of your owl pellet R Average mass 5 3 Z 5 R I} 4. Qualitative observations of your pellet (8% Et, smell, touch, etc.). m , h / WSl/CY/ .5771? 5. Total number of prey animals found in your pellet a. Average number of prey per pellet 4 . 8 5 b. Number of pellets dissected fl. 6. Total number secies were reresented in our eIlet T c “Organism Yours Rats —-. W e 8 z -6-_ S h rows Other Prc Analysis 1 . How much food does an adult B Owl consume during a year? Show our calculations wring fl». : tf‘lr aépf‘d‘Q'rT’iq’ fl I 7 q 2. Use the Following information to answer the questions below: ’ - One pair of adult barn owls produces 6 owlets during a mating Season. -‘ \ W . ‘ ' ' - Eacnowlet consumes two mice per day. Q ,4, ’ 3 l \ \ l, ‘I -. .» w r, ; \ . ‘ V . 2- d) J} rt 1 -.. r t . hf) tr 1|, F1” ’7 t) (It WE) VI}! ( in Odell perjklgagktm ,L I ‘F l " -“,"h r' r r‘ 1 l l ' :’_ _ l ‘ ’ [Tl “0133". (ll-“A {COR Ex, is ONQ afickfflon {Sr-“fl; "(l LGJJ Cari s. new ' ;:s,3,,-.,_,§W_.:iflt__f1'_‘mj‘sts 9;” " Mr"; rt Kory ll... ,,-,\‘,,-.CL\»:91:£J:LQL ,.__ r ‘ l“ t . t a. t it t“ l \ituu Jr“ \i‘lil \'.ll\\“5.|llt‘l‘i\ it“ th‘. ‘1‘“ I“ 1“ Ll‘ ‘ its“ mam Hlu‘t‘ it ill the adult mils need to bring to the owlets durin l‘cctl llh‘lti tit liit‘ ttt‘fill' f " " g the two months they r. Hm 1mm mug “ill the mxl tirinin consume during one year? \QI‘N‘I‘L- J mm 1 “m3.” um “ch m the space below that includes all the prey items discovered in the owl pellets_ 1 Hi my in tin llltlL‘ other organisms to malte- the web complete. Label the organisms (at least 15) and ttlc‘lll‘le‘ lllt‘tl mlc as a producer and consumer (primary! secondaryf tertiary and quaternary). Remember that .m m gmll‘lll can act at Illml} trorihic levels in the food web. t ML l\‘§i'\\ -~ " swim kind of ecologienl impact does the presenceof an owl family have on the surrounding populations of tittientsantlhmls‘? .t i Mi C{\ “it; deG’lU ,L OW” “from our PcPLléw long. the it!“ 0 rule: Only about ten percent of the energy on a no ' as one organism consumes another. The remainder is lost ' The Food Chain: Grass- Grasshopper ~ Shrew u The Barn owl is a tertiary consumer The grass assimilated 10,000 calories of energy via photosynthesis «Calculate the amount of energy transferred to the Barn Owl. How does your calculated number compare with the assimilated energy at the level of the producers? Gross ‘ ’10, 003 - Graseqaper: 4000 -§htew."lcv. Bern owl: 40 mm.Whyisthat?Explain. 7.1‘here is typically no trophic level above the owls in The us are no precipitant cf- one am. shrew move 904mb l k i . it” 1 anib’ 9 l l S RWS woven; ow» ltmod Gm!“ Wm (Roam not“ \il‘ 2 (P Mal {9&9} HVQUCQT\ (06m) i?rm\ m ...
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