Ppt on extinct species of plants and animals

Chapter 7: Biodiversity and Conservation Mr. Manskopf Notes also are at

weak some strong U.S. law Endangered Species Act (ESA) U.S. law Endangered Species Act (ESA) ESA Endangered Species Act Passed 1973 Passed 1973 Protect plant and animals in danger of extinction Protect plant and animals in danger of extinction List created of those threatened and endangered List created of those threatened and endangered Currently 1,300+ listed Currently 1,300+ listed ESA Forbids governments and citizens from harming listed species and habitats Forbids trade in products made from/


A Changing Landscape About 1600 years ago, people from Polynesia began settling in the islands of Hawaii These island people were accustomed to limited.

A Changing Landscape Even though they respected the land, these early settlers changed Hawaiis ecology They cleared forests for farmland and introduced nonnative crop plants, along with animals such as pigs and rats Eventually, as a result of the Polynesian settlers activities, many native plants and animals became extinct A Changing Landscape Beginning in the late 1700s, new settlers began to arrive in Hawaii These new settlers, who eventually/


Sustaining Biodiversity: The Species Approach Chapter 9.

people, over time, the loss of the rainforest can lead to the extinction of plants and animals as well as contribute to global climate change. http://serc.carleton.edu/eyesinthesky2/week11/using_imageJ_detect_change.html  Conservative estimates of extinction = 0.01-1.0% Growth of human population will increase this loss Rates are higher where there are more endangered species Tropical forests and coral reefs, wetlands and estuaries—sites of new species—being destroyed  Speciation crisis/


Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Slides prepared by Jay Withgott and Heidi Marcum Copyright © 2008.

The IUCN Red List (International Union for the Conservation of Nature) = an updated list of species facing high risks of extinctionsThe IUCN Red List -23% of mammal species -12% of bird species -31 - 86% of all other species Since 1970, 58 fish species, 9 bird species, and 1 mammal species has gone extinct -In the U.S., in the last 500 years, 236 animal and 17 plant species are confirmed extinct -Actual numbers are undoubtedly higher Copyright © 2008 Pearson Education/


Chapter 11 Sustaining Biodiversity: The Species Approach.

Denali plants. Anchorage Daily News, June 26, 2006.  Union of Concerned Scientists: Invasive Species  PBS: Strange Days on Planet Earth  USGS: Nonindigenous Aquatic Species Core Case Study: The Passenger Pigeon - Gone Forever  Once the most numerous bird on earth.  In 1858, Passenger Pigeon hunting became a big business.  By 1900 they became extinct from over- harvest and habitat loss. Figure 11-1 Animation: Humans Affect Biodiversity PLAY ANIMATION SPECIES EXTINCTIONSpecies/


UNIT 3 ECOSYSTEMS. Ecosystem Definition: The living community of plants and animals (Biotic) in any area together with the non-living components of the.

to the extinction of species of plants and animals that can live only in the different natural ecosystems. Some species if eliminated seriously affect the ecosystem. These are called ‘keystone’ species. Mountain ecosystems are extremely fragile as degradation of forest cover leads to severe erosion of soil and changes in river courses. Island ecosystems are easily affected by any form of human activity which can lead to the rapid extinction of several of their unique species of plants and animals. Evergreen/


Chapter 10: Biodiversity. Chapter 10 Biodiversity Big Ideas The huge diversity of life on Earth is critical to all species. The huge diversity of life.

Some weak Some weak Some strong Some strong U.S. law Endangered Species Act (ESA) one of the strongest U.S. law Endangered Species Act (ESA) one of the strongest ESA Endangered Species Act Passed 1973 Passed 1973 Protect plant and animals in danger of extinction Protect plant and animals in danger of extinction List created of those threatened and endangered List created of those threatened and endangered Currently ~1400 listed Currently ~1400 listed 2000 total worldwide 2000 total/


Biodiversity and Endangered Species. Chapter Overview Questions How do scientists account for the development of life on earth? What is biological evolution.

: SPECIES EXTINCTION Species can become extinct: – __________: A species is no longer found in an area it once inhabited but is still found elsewhere in the world. – ____________: Occurs when so few members of a species are left they no longer play its ecological role. – ________________Species is no longer found on the earth. Global Extinction Some animals have become __________ extinct because of ______ activities. Figure 9-2 Endangered and Threatened Species: Ecological/


Chapter 5 Population Ecology Populations Growth Population Growth Three factors can affect population size:  number of births  the number of deaths.

(1973)  Protection for endangered and threatened plant and animal species & their habitats Effectiveness??? Exemptions are often granted if No alternatives to the project National or regional significance of project Benefits outweigh those of any alternatives CITES (late 1970s)-prohibits trade and commerce of threatened and endangered species  By 1998: signed by 144 countries 112 Niche is the species’ occupation and its Habitat location of species (its address) 113 Niche A species’ functional role in its/


Geologic Time and Earth’s Biological History Designed to meet South Carolina Department of Education 2005 Science Academic Standards.

, whether through an extinction or creation of new traits for adaptation to already existing plants and animals. 28 Table of Contents Standard 8-2.7Standard 8-2.7: Summarize the factors, both natural and man-made, that can contribute to the extinction of a species. Why Extinction?  Extinction of a species occurs when no more members of a particular species remains. Extinction through time is very common, and, in fact, nearly 90 percent of all species that ever lived on/


Final Review LCHS 2013. Which type of rock listed below covers the majority of the Earth’s land surface? I. Igneous II. Metamorphic III. Sedimentary A.

1.6 million, there are about 10,000 different species of bacteria, 250,000 different species of protists, 100,000 different species of fungi, 250,000 different species of plants, and about 1,000,000 different species of animals known at this time. More than half of all animal species are insects (800,000 species), and beetles (300,000 species) comprise the largest order of insects (one-fifth of all species on Earth). Which groundwater contaminant listed below does NOT result from/


© 2011 Pearson Education, Inc. CHAPTER 6 Wild Species and Biodiversity.

, Inc. According to Fig. 6-5, what percentage of U.S. species of plants and animals are considered to be at risk of extinction? a.approximately 33% b.approximately 55% c.approximately 67% d.approximately 92% Interpreting Graphs and Data-1 © 2011 Pearson Education, Inc. According to Fig. 6-5, what percentage of U.S. species of plants and animals are considered to be at risk of extinction? a.approximately 33% b.approximately 55% c.approximately 67/


Biodiversity and Endangered Species. ORIGINS OF LIFE 1 billion years of chemical change to form the first cells, followed by about 3.7 billion years of.

Present 65 million years ago 225 million years ago Climate Change and Natural Selection Changes in climate throughout the earth’s history have shifted where plants and animals can live. Figure 4-10 SPECIATION, EXTINCTION, AND BIODIVERSITY Speciation: when a new species forms. A new species can arise when member of a population become isolated for a long period of time which is called geographic isolation. – Genetic makeup changes, preventing/


Extinction: Lights Out Extinction occurs when the population cannot adapt to changing environmental conditions.  The golden toad of Costa Rica’s Monteverde.

: SPECIES EXTINCTION Species can become extinct: – Locally: A species is no longer found in an area it once inhabited but is still found elsewhere in the world. – Ecologically: Occurs when so few members of a species are left they no longer play its ecological role. – Globally (biologically): Species is no longer found on the earth. Global Extinction Some animals have become prematurely extinct because of human activities. Figure 11-2 Endangered and Threatened Species/


______________ and __________ __________ 1. ___________ OF LIFE ________years of _______ change to form the first cells, followed by about ________years.

commercially traded as live specimens or wildlife products because they are in danger of extinction and ________ species of animals and __________of plants whose international trade is monitored because they are at risk of becoming threatened. 89 Species to Know ______________ 90 Fig. 10-30 Adopt a forest. Plant trees and take care of them. Recycle paper and buy recycled paper products. Buy sustainable wood and wood products. Choose wood substitutes such as bamboo furniture/


Dd.  Bio means ‘life’ and diversity means ‘variety’, hence, biodiversity refers wide variety of life on the earth.  Our planet-earth (biosphere) contains.

macaque, capped monkey, golden monkey. 5.PlantsA large number of medicinal plants (like rauvol fia serpentina), sandal wood tree (like santalum, cycas bed donei). RED - data book: RED - data book: RED - data book contains the list of endangered species of plants and animals. The RED – data gives the warning signal for those species which are endangered and if not protected they become extinct in near future. 1. Pollution 1. Pollution: Humans/


SAVING SPECIES AND ECOSYSTEM SERVICES Chapter 8. WHAT ROLE DO HUMANS PLAY IN THE LOSS OF SPECIES AND ECOSYSTEMS  Extinctions are natural but sometimes.

% of the country’s endangered and threatened species  The pesticide DDT can be biomagnified about 10 million times in a food chain, causing animals such as the osprey, brown pelican, and bald eagle to die  Projected climate change could help drive a quarter to half of all land animals and plants to extinction by the end of the century  1/3 of the United States food supply comes from insect-pollinated plants, and honeybees/


Biodiversity. Biodiversity Big Ideas The huge diversity of life on Earth is critical to all species. The huge diversity of life on Earth is critical to.

Some weak Some weak Some strong Some strong U.S. law Endangered Species Act (ESA) one of the strongest U.S. law Endangered Species Act (ESA) one of the strongest ESA Endangered Species Act Passed 1973 Passed 1973 Protect plant and animals in danger of extinction Protect plant and animals in danger of extinction List created of those threatened and endangered List created of those threatened and endangered Currently ~1600 listed Currently ~1600 listed 2258total worldwide 2258total worldwide ESA/


Sustaining Wild Species Chapter 22. Human impact on Biodiversity  Factors favoring an increase in biodiversity  Physically diverse habitat  Moderate.

via storage compartments on aircraft, in the ballast water of tankers and cargo ships, and on imported products such as wooden packing crates.  After habitat loss and degradation, deliberate or accidental introduction of nonnative species into ecosystems is the biggest cause of plant and animal extinctions. Extinction threats from hunting and poaching  Poaching is the illegal hunting of endangered animals and the illegal taking of endangered plants.  Bush meat: meat from non traditional sources, such as/


Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Enger & Smith Environmental Science A Study of Interrelationships.

migratory species. 11.2 The Value of Biodiversity  Genetic Resources If an organism goes extinct, we have lost the ability to use it for our own needs. Wild ancestors of our food grains are thought to be extinct. 50% of our common drugs come from plants and animals.  Soil Formation Weathering of rock, aided by bacteria, fungi, tiny animals, and plants roots build soil. Our food supply depends on the protection and management of soil/


Biodiversity and Extinctions. Biodiversity Biodiversity is the variation of organisms in an area. This includes: – Species diversity - # of different.

evidence to show that we are in the middle of the sixth mass extinction. – WWF found that 34%fish, 25%amphibians, 24%mammals, 20%reptiles, 14% plants, 12%birds are under threat of extinction – 11,046 plant and animal species are at risk of becoming extinct. – In the US 539 species have become extinct and 33% are threatened – At a 1% extinction rate 1/5 of the species will be gone by 2030 – Many scientists believe it/


Survival of Species By: Cammie Goodman. Survival of Species You already know that every kind of living thing has adaptations that help it survive. But.

than they can produce offspring.  The number of animals of that kind will get smaller and smaller, until the species is extinct.  An endangered species is one that is in danger of disappearing, or becoming extinct.  Events in nature can cause a species to become endangered or extinct. So can human activities. Events in Nature Affect Species Long before people lived on Earth, species of plants and animals become extinct. Events in nature caused them to die faster/


Chapter 11: Biodiversity Issues 11.1 Biodiversity Loss and Extinction 11.2 The Value of Biodiversity 11.3 Threats to Biodiversity 11.4 What Is Being Done.

. Habitat/Refuges  Refuges protect species, serve as nursery sites, and provide temporary stopping places for migratory species. Genetic Resources  If an organism goes extinct, we have lost the ability to use it for our own needs.  Wild ancestors of our food grains are thought to be extinct.  50% of our common drugs come from plants and animals. Soil Formation  Weathering of rock, aided by bacteria, fungi, tiny animals, and plants roots build soil.  Our/


Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings PowerPoint ® Slides prepared by Jay Withgott and Heidi Marcum Copyright © 2008.

The IUCN Red List (International Union for the Conservation of Nature) = an updated list of species facing high risks of extinctionsThe IUCN Red List -23% of mammal species -12% of bird species -31 - 86% of all other species Since 1970, 58 fish species, 9 bird species, and 1 mammal species has gone extinct -In the U.S., in the last 500 years, 236 animal and 17 plant species are confirmed extinct -Actual numbers are undoubtedly higher Copyright © 2008 Pearson Education/


UNIT III: BIODIVERSITY & BIOTIC RESOURCES Introduction Definition Genetic, Species and Ecosystem diversity Value of biodiversity Hot-spots of biodiversity.

and vulnerable species of plants and animals is kept From time to time, this database is translated into popular form and published as Red Data Books‘ The red data symbolizes the warning signal for those species which are endangered and if not protected are likely to become extinct in near future In India, nearly 450 plant species have been identified in the categories of endangered, threatened or rare Existence of about 150 mammals and 150 species of/


Entire Year Environmental Review. SUSTAINABLE To use resources in such a way as to meet needs now and provide for needs in the future. Without depleting.

of millions of plant and animal specimens. The trade is diverse, ranging from live animals and plants to a vast array of wildlife products derived from them, including food products, exotic leather goods, wooden musical instruments, timber, tourist curios and medicines. Levels of exploitation of some animal and plant species are high and the trade in them, together with other factors, such as habitat loss, is capable of heavily depleting their populations and even bringing some species close to extinction/


 Our planet-earth (biosphere) contains more than 20 million species of organisms. But, of which only 1.4 million species have been identified so far.

macaque, capped monkey, golden monkey. 5. PlantsA large number of medicinal plants (like rauvol fia serpentina), sandal wood tree (like santalum, cycas bed donei). RED - data book: RED - data book: RED - data book contains the list of endangered species of plants and animals. The RED – data gives the warning signal for those species which are endangered and if not protected they become extinct in near future. 1. Pollution 1. Pollution: Humans/


Table of Contents – pages iii

living organisms. Natural resources include sunlight, water, air, and plant and animal resources. Section 5.2 Summary – pages 121-125 Section 5.2 Summary – pages 121-125 Legal protections of species In response to concern about species extinction, the U.S. Endangered Species Act became law in 1973. This law made it illegal to harm any species on the endangered or threatened species lists. Section 5.2 Summary – pages 121-125/


Evolution and Biodiversity

65 Cretaceous: up to 80% of ruling reptiles (dinosaurs); many marine species including many foraminiferans and mollusks. Cretaceous Mesozoic Jurassic Extinction Triassic: 35% of animal families, including many reptiles and marine mollusks. 180 Triassic Extinction Permian: 90% of animal families, including over 95% of marine species; many trees, amphibians, most bryozoans and brachiopods, all trilobites. 250 Permian Carboniferous Extinction 345 Figure 4.12 Fossils and radioactive dating indicate that five/


Biodiversity and Changes in the Ecosystems: Consequences to Sustainable Development Hamdallh Zedan Conference on Environmental Economics and Sustainable.

week More than 31,000 plant animal species are threatened with extinction Some 75 % of the genetic diversity found in agricultural crops have been lost over the last century Of 6300 animal breeds, 1350 are endangered or already extinct Forests and ecosystems are being destroyed at the rate of over 10 million hectares every year If current destruction rate in forests and coral reefs is maintained, 50% of plant and animal species will be gone by/


Extinction Is Forever.

endangered in the near future In 2007, the Red List included 16,306 plants and animals in danger of extinction; 60% higher than 1995; may greatly underestimate the number as many species have not been classified Endangered Species Percentage of Various Species Threatened with Premature Extinction If Species Become Extinct? Instrumental value: usefulness to us in providing many of the ecological and economical services Use Value: benefits all from economic goods to science Ecotourism/


Chapter 9 Sustaining Biodiversity: The Species Approach The last word in ignorance is the person who says of an animal or plant: “What good is it?”… If.

world’s plant and animal species Conservative estimates of extinction = 0.01-1.0% Growth of human population will increase this loss Rates are higher where there are more endangered species Tropical forests and coral reefs, wetlands and estuaries—sites of new species—being destroyed Extinction Rates Are Rising Rapidly Endangered and Threatened Species Are Ecological Smoke Alarms Endangered species So few members that the species could soon become extinct Threatened species (vulnerable species) Still enough/


Chapter 9 Sustaining Biodiversity: The Species Approach

½ of the world’s plant and animal species Extinction Rates Are Rising Rapidly (2) Conservative estimates of extinction = 0.01-1.0% Growth of human population will increase this loss Rates are higher where there are more endangered species Tropical forests and coral reefs, wetlands and estuaries—sites of new species—being destroyed Speciation crisis Endangered and Threatened Species Are Ecological Smoke Alarms (1) Endangered species So few members that the species could soon become extinct Threatened species/


Chapter 7 Sustaining Biodiversity: The Species Approach.

extinct per year 14,000 extinct per year Number of species existing Effects of a 0.1% extinction rate 5,000 extinct per year 100 million 50 million 14 million IMPORTANCE OF WILD SPECIES  We should not cause the premature extinction of species because of the economic and ecological services they provide.  Some believe that each wild species has an inherent right to exist. Some people distinguish between the survival rights among various types of species (plants vs. animals/


Sustaining Biodiversity: The Species Approach Chapter 9.

0.04 ppm Recovery  Bald eagle recovered  Factors leading to recovery Ban on DDT Crackdown on hunting Prevention of habitat destruction Climate Change and Extinction  More rapid compared to the past  Expected to eliminate >25% of land animal and plant species  Polar bears and penguins threatened Illegal Killing and Trading of Wildlife  Poaching endangers many larger animals, rare plants  Over two-thirds die in transit  Illegal trade $6–$10 billion per year  Wild/


Sustaining Biodiversity: The Species Approach

year, and threaten about 20% of the country’s endangered and threatened species. Population growth, overconsumption, pollution, and climate change can cause species extinctions The pesticide DDT can be biomagnified about 10 million times in an estuary food chain, causing animals such as the osprey, brown pelican and bald eagles to die. Projected climate change could help drive a quarter to half of all land animals and plants to extinction by the end of this/


Life Boot Camp 5.9C Predict the effects of changes in ecosystems caused by living organisms including humans such as the overpopulation of grazers or the.

in energy provided for producers C. lack of habitat areas for plants and animals D. gain of habitat areas for new species of animals and plants 41. What is an effect of cutting down forests for the development of land and cities? A. increase in amount of oxygen B. decrease in energy provided for producers C. lack of habitat areas for plants and animals D. gain of habitat areas for new species of animals and plants 42. The Texas Blind Salamander lives in the/


Threatened, Endangered and Extinct Species Standard 4.7.

(PABS) –Helps to maintain state’s biodiversity –Tracks and monitors plants and animals –Coordinates programs, surveys and research on PA wildlife –Developing bio-reserves throughout PA Help conserve ecosystems throughout the state Endangered Species Act  ESA – US law that governs the protection of species whose populations are in decline and could be in danger of extinction  The law forbids hunting, killing, collecting or harming of species listed as endangered or threatened.  3 categories/


Endangered species ONLY WHEN THE LAST TIGER HAS BEEN KILLED ONLY WHEN THE LAST TREE HAS BEEN CUT DOWN ONLY WHEN THE LAST SPECIES HAS BEEN EXTINCT ONLY.

because the climate became cooler--maybe because an asteroid collided with the earth and caused a big cloud of dust that blocked out the sun. Some species of plants and animals die out naturally because newer species are more successful at competing for food and living space. Others have become extinct because of changes in the planet or because of natural disasters. Dinosaurs, for example, may have died out because the climate/


Chapter 7: Biodiversity and Conservation

Some weak some strong U.S. law Endangered Species Act (ESA) ESA Endangered Species Act Passed 1973 Protect plant and animals in danger of extinction List created of those threatened and endangered Currently 1,300+ listed ESA Forbids governments and citizens from harming listed species and habitats Forbids trade in products made from listed species ESA Protects listed species from harm No development that harms listed species Can a Shopping Mall be built where listed/


ANNOUNCEMENTS.

in this category. Data Deficient (DD) – Not enough data to make an assessment of its risk of extinction. Not Evaluated (NE) – Has not yet been evaluated against the criteria.[6] Why are species endangered? Endangered animals are animals that are in danger of becoming extinct. Causes include: Habitat destruction / population pressure Collection and hunting / poaching New plants and animals being introduced that don’t belong there Pollution See HIPPO H.I.P/


Sustaining Biodiversity: The Species Approach

? 0.1% to 1% seen as conservative estimate: Likely to increase due to population and footprint “Hot Spots” under attack Simplifying ,many ecosystems… monoculture Estimates 20% of world’s plants and animals gone by 2030 and 50% by end of century How are humans affecting extinction rates? Habitat fragmentation and disturbance leads to more opportunistic species like weeds, cockroaches, rodents etc. Numbers based on limited data Precautionary Principle “To keep/


ENVIRONMENTAL SCIENCE 13e CHAPTER 8: Sustaining Biodiversity: The Species Approach.

rhinoceros, rare plants and birds Low /extinction of species and to protect overall biodiversity by using laws and treaties, protecting wildlife sanctuaries, and making greater use of the precautionary principle. Animation: Species Diversity By Latitude PLAY ANIMATION Animation: Area and Distance Effects PLAY ANIMATION Animation: Humans Affect Biodiversity PLAY ANIMATION Animation: Resources Depletion and Degradation PLAY ANIMATION Animation: Biodiversity Hot Spots PLAY ANIMATION Animation: Habitat Loss and/


Endangered Species The rare scare….

for the endangerment of many animal species. Elephant poachers have been the cause of many endangered and extinct species of elephants. Elephants have long been hunted and killed for their valuable ivory tusks Why Save Endangered Species? “Plants and animals hold medicinal, agricultural, ecological, commercial and aesthetic/recreational value. Endangered species must be protected and saved so that future generations can experience their presence and value.” Medicinal About 40% of all prescriptions written/


Chapter 9 Sustaining Biodiversity: The Species Approach.

is s widely recognized as the most comprehensive, objective, global approach for evaluating the conservation status of plant and animal species. The goals are to: Identify and document those species most in need of conservation attention if global extinction rates are to be reduced; and Provide a global index of the state of change of biodiversity. The percentage of species in several groups which are listed as critically endangered, endangered, or vulnerable on the 2007/


Biodiversity Describe the diversity of species types on Earth, relating the difference Between known and estimated numbers. List and describe 3 levels.

destroy habitat that is necessary for plants and animals to survive. What is Biodiversity? Every day somewhere on Earth a species becomes extinct. Extinction is when the last member of a species dies. Biodiversity – refers to the number and variety of different species in a given area. The study of diversity starts with cataloging all of the species on Earth. About 1.7 million species are known and of those many of then are insects. Many scientist estimate/


ENDANGERED SPECIESENDANGERED SPECIES P RESENTED BY :- AMANPREET S INGH www.powerpointpresentationon.blogspot.com.

examples of threatened species. ENDANGERED SPECIES – a specie, plant or animal, that is in immediate danger of becoming extinct. Its numbers are usually low, and it needs protection in order to survive. The Siberian tiger, the southern sea otter, the snow leopard, the green pitcher plant, and thousands of other plants and animals are endangered worldwide. EXTINCT SPECIES – an extinct species is one that is no longer living. The passenger pigeon, the dodo, and the Stegosaurus are examples of extinct species/


Sustaining Biodiversity: The Species Approach

, and Selling of Wild Species Threatens Biodiversity Poaching and smuggling of animals and plants Animal parts Pets Plants for landscaping and enjoyment Prevention: research and education White Rhinoceros Killed by a Poacher Individuals Matter: Jane Goodall Primatologist and anthropologist 45 years understanding and protecting chimpanzees Chimps have tool-making skills Rising Demand for Bush Meat Threatens Some African Species Indigenous people sustained by bush meat More hunters leading to local extinction/


Evolution, Extinction, Maintaining Biodiversity

and resource consumption People have hunted species to extinction for millennia Extinctions followed human arrival on islands and continents Current extinction rates are higher than normal The Red List = an updated list of species facing high risks of extinctions 23% of mammal species 12% of bird species 31 - 86% of all other species Since 1970, 58 fish species, 9 bird species, and 1 mammal species has gone extinct In the U.S., in the last 500 years, 236 animal and 17 plant species are confirmed extinct/


1 Biological Evolution. 2 Evolutionary Bush -- thousands of earlier and later branches.

breeding of domesticated plants and animals by man.The selective breeding of domesticated plants and animals by man. Question: What’s the ancestor of the domesticated dog?Question: What’s the ancestor of the domesticated dog? 53 Biodiversity 54 55 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 Interpretations of/


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