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Transcript
1 What was Charles Darwin’s idea about evolution called? A) Competiton B) Natural Selection C) Survival D) Complete Evolution 2 What are the two steps of speciation? A) Geographic Isolation and Reproductive Isolation B) Adaptive radiation and geographic isolation C) Reproductive isolation and adaptive radiation D) None of the above 3 What is adaptive radiation? A) Differences in isolated groups become so great, they can no longer interbreed B) When a population becomes divided by a natural barrier C) survival of the fittest D) When one species splits into many species to fill open habitats 4 What was Jay Gould’s theory? A) Punctuated equilibrium B) Popularized evolution C) Gradualism D) Neodarwinism 5 Which of these is a Prokaryote? A) bacteria B) fungi C) protista D) plants 6 What is taxonomy? A) the epithet for the species B) the genus name of the species C) method to name and classify species D) a two-part Latin name 7 Layering occurs in which type of rock? A) igneous B) sedimentary C) metamorphic 8 Evolution is: A) rapid change B) complete change C) gradual change D) extreme change 9 Which is not a cause of evolutionary change? A) genetic drift B) speciation C) mutation D) founder effect 10 Genetic drift involves: A) isolation accumulate mutations B) Mutations accumulate isolation C) founder effect D) isolation 11 When a new species evolves during the recovery period following mass extinction A) Mass extinction B) Background extinction C) Adaptive radiation D) Emergent Species 12 Which island would have the most species diversity? A) bigger islands B) small islands C) islands close to mainland D) islands farther from mainland 13 The Galapagos Islands are located – Near Europe – Near Australia – Below North America – Below South America A.In the Atlantic Ocean 14 What was interesting about the finches beaks? A. They all got fatter due to the tropical climate B. They got narrower since the seeds were harder here C. They were the same as on the mainland D. They all adapted individually to different situations. E. They fell off within 5 months of adult life. 15 The current species on the island A. Separated into different species over time as their beaks and characteristics adapted B. Killed each other, leaving only the species seen now- a result of survival of the fittest and competition. C. All were replaced by new finches/birds the settlers brought over D. Were partially replaced by finches/birds the settlers brought over 16 According to Darwin, what made up natural selection? A. Competition B. Variance C. Competition and Variance D. Competition and Instinct 17 Being “fit” means ? A. Being the strongest in the species B. Being the strongest in the population C. Being the fastest and strongest in the species D. Being the fastest and strongest in the population E. Surviving to reproduce 18 Fossils are formed when: A. Sedimentary rock compress against each other with the bones of dead organisms in them B. Dead animals bones are weathered by natural wind processes C. The sun burns away flesh and imprints dead animal bones into rock and sand\ 19 Limbs that share similar bone structure but have different function are called A. Homogenous B. Synonymous C. Homology D. Forelimbs E. Homologous 20 What is not a type of competition? A) Resource competition B) Preemptive competition C) Mating competition D) Interference competition 21 Why do insecticides not work completely? A.Companies purposely make the products weaker so customers have to buy more B.Government regulates their power to protect the environment under the FIFRA C.They target only adults in the insect population so those hatched do not get killed D.The stronger survive and reproduce genetically resistant offspring E.Insecticide has a very short half-life, so it wears off before the job is done a lot of times. 22 How do we get Biodiversity? 23 Evolution, Biodiversity, and Community Processes APES 24 Biodiversity 25 26 Biodiversity • Biodiversity – increases with speciation – decreases with extinction • Give-and-take between speciation and extinction changes in biodiversity • Extinction creates evolutionary opportunities for adaptive radiation of surviving species 27 Interpretations of Speciation Two theories: 1.Gradualist Model (NeoDarwinian): Slow changes in species overtime 2.Punctuated Equilibrium: Evolution occurs in spurts of relatively rapid change 29 Adaptive Radiation Emergence of numerous species from a common ancestor introduced to new and diverse environments Example: Hawaiian Honeycreepers Convergent Evolution Species from different evolutionary branches may come to resemble one another if they live in very similar environments Example: 1. Ostrich (Africa) and Emu (Australia). 2. Sidewinder (Mojave Desert) and Horned Viper (Middle East Desert) 32 Coevolution • Evolutionary change – One species acts as a selective force on a second species – Inducing adaptations – that act as selective force on the first species Example: 1. Wolf and Moose 2. Acacia ants and Acacia trees 2. Yucca Plants and Yucca moths 3. Lichen 34 Extinction • Extinction of a species occurs when it ceases to exist; may follow environmental change - if the species does not evolve • Evolution and extinction are affected by: – large scale movements of continents – gradual climate changes due to continental drift or orbit changes – rapid climate changes due to catastrophic events 35 36 Extinction • Background extinction - species disappear at a low rate as local conditions change • Mass extinction - catastrophic, widespread events --> abrupt increase in extinction rate • Five mass extinctions in past 500 million years • Adaptive radiation - new species evolve during recovery period following mass extinction 37 http://www.geog.ouc.bc.ca/physgeog/contents/9h.html Mass Extinctions Date of the Extinction Event Percent Species Lost 65 mya (million years ago) 85 213 mya 44 Dinosaurs, plants (except ferns and seed bearing plants), marine vertebrates and invertebrates. Most mammals, birds, turtles, crocodiles, lizards, snakes, and amphibians were unaffected. Marine vertebrates and invertebrates 248 mya 380 mya 450 mya 75-95 70 50 Marine vertebrates and invertebrates Marine invertebrates 38 Marine invertebrates Species Affected Equilibrium Theory of Biodiversity 1. Diversity is a balance of factors that increase diversity and factors that decrease diversity 2. Production of new species (speciation), and influx can increase diversity 3. Competitive exclusion, efficient predators, catastrophic events (extinction) can decrease diversity 4. Physical conditions a. variety of resources b. Predators 39 c. environmental variability Species Diversity Def: the variety of species in an area Two subcomponents: species richness 40 species evenness Species Richness vs. Evenness Species Richness: measurement of the number of species in a given area Species Evenness (: measurement of how evenly distributed organisms are among Species (also called Species Abundance) Community A species species species species species 1 2 3 4 5 25 0 25 25 25 Community B 1 1 1 1 96 41 Determining Species Diversity Scientists may want to: * get an estimate of # of species in an area * compare species diversity of two communities To be accurate, need to: * take both species evenness and species richness into account 42 Species Diversity Indices Shannon-Weiner (Shannon-Weaver) Index Diversity = H1=- ∑p1 {lnp1} (p sp 1 ln(p sp 1)) + (p sp 2 ln(p sp. 2) + … (p sp N ln(p sp. N) Measures: Species Richness and Species Abundance. Likelihood that the next indiv will be same species as previous species. 43 What does this graph tell you about species richness? 44 Shannon Weiner Values • Values-higher # higher biodiversity. • Value near 0 = every species is the same. • Value near close to the number of species = evenly distributed between the # of species. 45 Simpson Index of Diversity SID=1-D or 1-Diversity • D=n1(n1-1) + n2(n2-1)….nx(nx-1) • N(N-1) • Measures species richness • And eveness in habitat. 46 Simpson’s Diversity Index • Measure that accounts for both richness & % of each species. • The index first developed by Simpson in 1949. • Useful tool in terrestrial and aquatic ecologists for many yrs. 47 Simpson’s Values • The higher the SID, the more diverse your sample is. 48 Why should we care about measuring biodiversity (species diversity)? 49 Biodiversity Factoids ~ 2,000,000 spp. have been described ~ 10-30,000,000 species actually exist (est.) ~ 8,000,000 – 22,000,000 spp. unidentified ~ 40 – 60% of all spp. occur in two areas: * tropical rainforests * coral reefs 50 Comparison of Two Communities • Richness (number of species) • Relative abundance • How do we describe these differences? 51 Biogeographical Changes • Richness declines from equator to pole • Due to: –Evolutionary history –Climate 52 Fig 53.23 Bird species numbers Geographic (Sample) Size • Species-area curve • The larger the geographic area, the greater the number of species Fig. 23.25 North American Birds 53 Species Richness on Islands • Depends on: –Rate of immigration to island –Rate of extinction on island • These in turn depend on: –Island size –Distance from mainland 54 How do species move? • • • • • Humans (accidental and intended) Animals (sticky seeds and scat) Wind and ocean currents (+ or -) Land bridges Stepping stone islands – affected by climactic changes (glaciation) – ocean levels – short-term weather patterns 55 What allowed colonization? • Niche opening • No competition • Endemics not utilizing resources • Accessibility to colonists 56 Theory of Island Biogeography 1. Immigration rate decreases as island diversity increases 2. Extinction increases as island diversity increases 3. Species equilibrium on islands is a balance of immigration and local extinction 57 58 Theory of Island Biogeography 1.Smaller islands have lower total populations 2.Probability of extinction increases with lower population 3.Smaller islands have lower species diversity 59 60 Theory of Island Biogeography 1.Islands further from mainland have lower immigration rates 2.More distant islands have lower species diversity 61 62 Wilderness Act of 1964 • Wilderness Act of 1964: directed the Secretary of the Interior, within 10 years, to review every roadless area of 5,000 or more acres and every roadless island (regardless of size) within National Wildlife Refuge and National Park Systems and to recommend to the President the suitability of each such area or 63 Roosevelt • T. Roosevelt also tripled the size of the forest reserves and transferred administration from Department of the Interior (USDOI) to Department of Agriculture (USDA. 64 Roosevelt • 1905, Congress created the US Forest Service to manage and protect forest reserves. Roosevelt appointed Gifford Pinchot as its first chief. • 1907, Roosevelt reserved 16 million acres of land. Congress was trying to ban Executive orders for forest reservation. Roosevelt did this defiantly the day before Congress’ ban became law! 65 Pinchot • (1905) Pinchot pioneered scientific management of forest resources on public lands, using the principles of sustainable yield and multiple use. 66 US National Park Service • 1912, Congress created the US National Park Service. • 1916, Congress passed the National park System Organic Act – declared that the parks were to be maintained in a manner that leaves them unimpaired for future generations and established the National 67 Community Relationships 68 Niche is the species’ occupation and its Habitat location of species (its address) 69 Niche A species’ functional role in its ecosystem; includes anything affecting species survival and reproduction 1. Range of tolerance for various physical and chemical conditions 2. Types of resources used 3. Interactions with living and nonliving components of ecosystems 4. Role played in flow of energy and matter cycling 70 Niche Fundamental niche: set of conditions under which a species might exist in the absence of interactions with other species Realized niche: more restricted set of conditions under which the species actually exists due to interactions with other species 71 Types of Species • Generalist –large niches –tolerate wide range of environmental variations –do better during changing environmental conditions • Specialist –narrow niches – more likely to become endangered – do better under consistent environmental conditions 72 r and k strategists • Depending upon the characteristics of the organism, organisms will follow a biotic potential or carrying capacity type reproductive strategy The r-strategists 1. High biotic potential – reproduce very fast 2. Are adapted to live in a variable climate 3. Produce many small, quickly maturing offspring = early reproductive maturity 4. “Opportunistic” organisms The K-strategists 1. Adaptations allow them to maintain population values around the carrying capacity 2. They live long lives 3. Reproduce late 4. Produce few, large, offspring 73 Types of Species • Native species normally live and thrive in a particular ecosystem • Nonnative species are introduced - can be called exotic or alien • Indicator species serve as early warnings of danger to ecosystem- birds & amphibians • Keystone species are considered of most importance in maintaining their ecosystem 74 Nonnative Species • Nonnative plant species are invading the nation's parks at an alarming rate, displacing native vegetation and threatening the wildlife that depend on them • At some, such as Sleeping Bear Dunes National Lakeshore in Michigan, as much as 23 percent of the ground is covered with alien species, and the rate of expansion is increasing dramatically. 75 Indicator Species • a species whose status provides information on the overall condition of the ecosystem and of other species in that ecosystem • reflect the quality and changes in environmental conditions as well as aspects of community composition 76 Keystone Species • A keystone is the stone at the top of an arch that supports the other stones and keeps the whole arch from falling – a species on which the persistence of a large number of other species in the ecosystem depends. • If a keystone species is removed from a system – the species it supported will also disappear – other dependent species will also disappear • Examples – top carnivores that keep prey in check – large herbivores that shape the habitat in which other species live – important plants that support particular insect species that are prey for birds – bats that disperse the seeds of plants 77 Species Interaction 78 Competition Any interaction between two or more species for a resource that causes a decrease in the population growth or distribution of one of the species 1. Resource competition 79 Competition 80 Resource Competition 81 Competition Any interaction between two or more species for a resource that causes a decrease in the population growth or distribution of one of the species 1. Resource competition 2. Preemptive competition 82 83 Competition Any interaction between two or more species for a resource that causes a decrease in the population growth or distribution of one of the species 1. Resource competition 2. Preemptive competition 3. Competitive exclusion 84 Competitive Exclusion 85 Competition Any interaction between two or more species for a resource that causes a decrease in the population growth or distribution of one of the species 1. Resource competition 2. Preemptive competition 3. Competition exploitation 4. Interference competition 86 Competition 87 PREDATION 88 Predator Adaptations • Prey detection and recognition –sensory adaptations –distinguish prey from non-prey 89 90 91 92 Predator Adaptations • Prey detection and recognition –sensory adaptations –distinguish prey from non-prey • Prey capture –passive vs. active –individuals vs. cooperative 93 94 95 96 97 98 Predator Adaptations • Prey detection and recognition –sensory adaptations –distinguish prey from non-prey • Prey capture –passive vs. active –individuals vs. cooperative • Eating prey –teeth, claws etc. 99 100 101 102 103 Prey Adaptations • Avoid detection – camouflage, mimics, – diurnal/nocturnal 104 105 106 107 108 Prey Adaptations • Avoid detection – camouflage, mimics, – diurnal/nocturnal • Avoid capture – flee – resist – escape 109 110 111 112 Prey Adaptations • Avoid detection – camouflage, mimics, – diurnal/nocturnal • Avoid capture – flee – resist – escape • Disrupt handling (prevent being eaten) – struggle? – protection, toxins 113 114 Herbivory Herbivore needs to find most nutritious –circumvent plant defenses 115 116 Herbivory Herbivore needs to find most nutritious –circumvent plant defenses Herbivory strong selective pressure on plants –structural adaptations for defense –chemical adaptations for defense 117 118 119 Herbivory 120 Herbivory 121 Herbivory 122 Symbiosis: Mutualists, Commensalists and Parasites 123 • Symbiosis and symbiotic relationship are two commonly misused terms • Translation of symbiosis from the Greek literally means “living together” • Both positive and negative interactions 124 Mutualism DEFINITION: An interaction between two individuals of different species that benefits both partners in this interaction 125 Mutualism • Increase birth rates • Decrease death rates • Increase equilibrium population densities, Raise the carrying capacity 126 Pollination • Animals visit flowers to collect nectar and incidentally carry pollen from one flower to another • Animals get food and the plant get a pollination service 127 Yucca and Yucca Moth • Yucca’s only pollinator is the yucca moth. Hence entirely dependent on it for dispersal. • Yucca moth caterpillar’s only food is yucca seeds. • Yucca moth lives in yucca and receives shelter from plant. 128 Lichen (Fungi-Algae) • Symbiotic relationship of algae and fungae…results in very different growth formas with and without symbiont. • What are the benefits to the fungus? 129 Nitrogen Fixation Darkest areas are nuclei, the midtone areas are millions of bacteria Gram -, ciliate 130 Commensalists • Benefit from the host at almost no cost to the host • Eyelash mite and humans • Us and starlings or house sparrows • Sharks and remora 131 Parasites and Parasitoids • Parasites: draw resources from host without killing the host (at least in the short term). • Parasitoids: draw resources from the host and kill them swiftly (though not necessarily consuming them). 132 Parasitic wasps • Important parasites of larvae. • In terms of biological control, how would this differ from predation? ovipositor 133 Ecological Processes 134 Ecological Succession Primary and Secondary Succession gradual & fairly predictable change in species composition with time •some species colonize & become more abundant; •other species decline or even disappear. 135 Ecological Succession Gradual changing environment in favor of new / different species / communities 136 137 Primary Succession Glacier Retreat 138 139 140 Disturbance Event that disrupts an ecosystem or community; • Natural disturbance •tree falls, fires, hurricanes, tornadoes, droughts, & floods • Human–caused disturbance •deforestation, erosion, overgrazing, plowing, pollution,mining • Disturbance can initiate primary and/or secondary succession 141 Ecological Stability Carrying Capacity – maximum number of individuals the environment can support 142 Ecological Stability - Stress 1. Drop in Primary Productivity 2. Increased Nutrient Losses 3. Decline or extinction of indicator species 4. Increased populations of insect pests or disease organisms 5. Decline in Species diversity 6. Presence of Contaminants 143 Which law directed the Secretary of the Interior to review every roadless area of 5,000 or more acres and every roadless island within National Wildlife Refuge and National Park Systems? A. Endangered Species Act B. Wilderness Act C. Lacey Act D. National Park Act E. Wild and Scenic Rivers Act 144 What are keystone species? A. existing in such small numbers that it is in danger of becoming extinct B. introduced to an environment where it is not native, and that has since become a nuisance C. likely to become an endangered species within the foreseeable future throughout all or a significant portion of its range D. serve as early warnings of damage to a community E. presence and role within an ecosystem has a disproportionate effect on other organisms within the system 145 Who did Roosevelt appoint to head the newly created US Forest Service to protect and manage the world’s forests? A. E.O. Wilson B. Aldo Leopold C. Robert MacArthur D. Stephen Mather E. Gifford Pinchot 146 Mutualism benefits: A) one of the organisms & hurts the other B) neither of the organisms C) both of the organisms D) benefits one & doesn’t hurt the other E) only one of the organisms 147 Commensalism: A) benefits only one of the organisms B) benefits both organisms C) benefits one, doesn’t harm the other D) benefits neither of the organisms 148 Biodiversity: A) decreases with speciation and extinction B) decreases with speciation and increases with extinction C) increases with speciation and extinction D) increases with speciation and decreases with extinction 149 What is not a pre-zygotic barriers? A) behavioral isolation B) habitat isolation C) mechanical isolation D) hybrid isolation 150 Which of the following does species richness not depend on? A) rate of immigration B) island size C) distance from mainland D) types of species 151 Which is a species on which the persistence of a large number of other species in the ecosystem depends? A) r-strategists B) k-strategists C) nonnative D) keystone 152 What is not characteristic of a k-strategists? A) long life B) bigger bodies C) produce a lot of offspring D) produce late in life 153 What is not a predator adaptation? A) prey detection B) prey capture C) eating prey D) avoid detection E) mass numbers 154 Bibliography 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. Miller 11th Edition http://abandoncorporel.ca/medias/evolution.jpg http://www.ne.jp/asahi/clinic/yfc/fetus.html rob.ossifrage.net/images/ http://www.mun.ca/biology/scarr/Five_Kingdoms_Three_Domains.htm http://www.gpc.peachnet.edu/~ccarter/Millerlec5/Millerlec5.PPT http://www.dnr.state.md.us/education/horseshoecrab/lifecycle.html http://www.falcons.co.uk/mefrg/Falco/13/Species.htm http://www.sms.si.edu/irlspec/NamSpecies.htm http://www.falcons.co.uk/mefrg/Falco/13/Species.htm http://www.globalchange.umich.edu/globalchange1/current/lectures/complex_life/complex_life.html http://nsm1.nsm.iup.edu/rwinstea/oparin.shtm http://www.angelfire.com/on2/daviddarling/MillerUreyexp.htm http://exobiology.nasa.gov/ssx/biomod/origin_of_life_slideshow/origin_of_life_slideshow.html http://www.geo.cornell.edu/geology/classes/Geo104/HistoryofEarth.html http://astrobiology.arc.nasa.gov/roadmap/objectives/o2_cellular_components.html http://pubs.usgs.gov/gip/fossils/ http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/halfli.html http://www.accessexcellence.org/AE/AEPC/WWC/1995/teach_rad.html http://biology.usgs.gov/s+t/SNT/noframe/pi179.htm http://www.npca.org/magazine/2001/march_april/nonnative_species.asp http://www.bagheera.com/inthewild/spot_spkey.htm Biology, 2003, Prentice Hall http://www.nearctica.com/ecology/habitats/island.htm 155 http://www.valdosta.edu/~grissino/geog4900/lect_1.htm