Biodiversity and Conservation – CBSE Notes for Class 12 Biology. View Notes - Power Notes 16.4 Typed from SCIENCE 1 at Mcarthur High School. Terrestrial biodiversity is usually greater near the equator, which is the result of the warm climate and high primary productivity. This includes deforestation for wood for cooking food. Habitat fragmentation, the loss of large units of habitat, is also a serious threat to biodiversity. The picture below shows an example of habitat fragmentation in the Amazon rainforest. Describe the threats to biodiversity from human activity in a given natural area of biological significance or conservation area. Crops livestock, fishery, and forests are a rich source of food. The second of the top two threats to Southeast Asian biodiversity identified by Hughes in the study is hunting and the illegal wildlife trade. Huge pressure from the World’s rapidly increasing population. Module: Human Geography. Explain which types of threats are having the largest impact on bio- diversity. Wild plants such as Cinchona and Foxglove plant are used for medicinal purposes. Threats to Biodiversity. THREATS TO BIODIVERSITY Reinforcement KEY CONCEPT The impact of a growing human population threatens biodiversity. BSCI 124 Lecture Notes ... LECTURE 37 - BIODIVERSITY & SPECIES EXTINCTION REQUIRED READING I. Biodiversity. Biodiversity – Threats Weston W Sechrest,University of Virginia, Charlottesville, Virginia, USA Thomas M Brooks, Center for Applied Biodiversity Science – Conservation International, Washington DC, USA Any direct or indirect human activity that threatens the planet’s biological diversity in the Human Activities and Loss of Habitat, 2. Threats to Biodiversity | WWF. Discuss the conflict between exploitation, sustainable development and conservation in tropical biomes. The third results from increased mobility and trade. Explain. - Habitat fragmentation - From human activity. Biodiversity Notes Short for Biological Diversity What does this mean? To correctly identify life forms, consideration should be given to the differences within various environments and ecosystems. Human population growth at a high level without balancing natural resource consumption and human living space with nature's requirements. CBSE Notes CBSE Notes Biology NCERT Solutions Biology. Let’s look at the devastating threats to the world’s biodiversity. Biodiversity on land is highly concentrated in the tropical rainforests. v Extinction is a natural event and, from a geological perspective, routine.. v In last century, human impact has been so severe that thousands of species and varieties are becoming extinct annually.. v Some of the main causes are:. Some ecosystems such as grasslands and freshwater systems are more affected than others, but pollution has modified even the poles and the atmosphere. 1. Deforestation, 3. • The Endangered Species Act works to protect individual species from extinction. What is Biodiversity? Threats of Biodiversity 1. All types of ecosystems are showing rapid change. Human activities also causes threats to the biodiversity. Threats to Antarctica - notes. Homework 6 – Siovhan Tan Referring to examples, discuss the threats to biodiversity hotspots and why these threats could prove critical (15 marks) Biodiversity hotspots are areas in the natural environment that contain some of the biggest concentration of flora and fauna in the world, often containing many rare and endangered species. o Biodiversity is defined as the variety and variability of life on Earth. The damage to these ecosystems is negatively impacting the species and habitats contained within them. The rare whale shark, a highly endangered species, is being killed off the coast of Gujarat. Habitat loss, pollution, resource exploitation, climate change, and introduction of non-native species are among the greatest threats to biodiversity. direct threat, contributing to reserve establishment) and the actors proposing reserves were studied for a random sample of 84 nature reserves with forest in southern Sweden, established 1926–1996. Overexploitation. Infertility poses major threat to biodiversity during climate change, study warns Date: May 24, 2021 Source: University of Liverpool Summary: … Yet note that nature is more than just animals. In north eastern states, the jhum cultivation is a major threat to biodiversity - … Climate change a bigger threat to landscape biodiversity than emerald ash borer. Overharvesting of fish, especially by trawling is leading to serious depletion of fish stocks. Threats to diversity - an essay by E.O. Threats to biodiversity -Habitat destruction - Important to protect habitat in order to protect biodiversity within it. Sample Questions: 1. T ourist number s ha ve gr own fr om 9000 in 1992-93 t o ov er 50,000 In 2012-13. Threats to Biodiversity 1 Habitat Fragmentation. Ecosystem conversion and ecosystem degradation contribute to habitat fragmentation. ... 2 Exotic Species Introductions. Infestation by alien species, such as the Codling Moth, is also a major threat to BC ecosystems. ... 3 Pollution. ... 4 Global Climate Change. ... 5 Corridors and Connectivity. ... climate change. Rainforests have been studied for their role as a carbon sink, absorbing copious amounts of this greenhouse gas emission. Objective: Students will be able to (SWBAT) describe the biodiversity crisis with 80% accuracy. Pollution, in the many forms it takes, is a major threat to biodiversity. Disease is what we diagnose with symptoms, trying to understand underlying cause Medicine is a primitive applied process Need to look at ecology and evolution as a part of that paradigm Even harder to understand disease in wildlife Fishing Expedition Not hypothesis driven Happens on human health side. Genetic pollution:- genetic pollution occurs by … However, a lot of man-made activities impose huge impacts on biodiversity. Below, we discuss six of the major threats to biodiversity: climate change, habitat loss and degradation, pollution, invasive species, over-exploitation and epidemics. Learn how serious these threats are in contributing to the loss of biodiversity in our planet. 1. So, as a report for the World Economic Forum notes, the steep decline in biodiversity “will inevitably impact bottom lines—for example, through reduced fish stocks disrupting commodity supply chains, economic losses from disasters such as flooding, and … ADVERTISEMENTS: Biodiversity, besides its ecological significance provides a socio-economic and monetary asset to the nation. So, biodiversity means diversity of life. THREATS TO BIODIVERSITY. Threat before re- serve acquisition (i.e. Biodiversity Notes Short for Biological Diversity What does this mean? Section 16.4 Threats to Biodiversity KEY CONCEPT The impact of a growing human population threatens biodiversity. The growth of human populations, consumption levels, and mobility is the root of most of the serious threats to biodiversity today. In these power point lecture notes, Earth/Environmental Science students will be introduced to the issues that affect the biodiversity in our oceans. Bios in Ancient Greek means life. 9. Turtles are being massacred off the coast of Orissa. Habitat loss. Learn More Wilson Biodiversity is the biological variety and variability of life on Earth.Biodiversity is a measure of variation at the genetic, species, and ecosystem level. SECTION 16. Even though India is one of the 17 identified mega diverse countries of the world, it faces lots of threats to its biodiversity. Global Warming. An increase in average temperature in the Altai-Sayan Ecoregion since the mid 1970’s is proved to be risen by 1.5°C in Russia. A fish native to Texas, eliminated by hybridization with introduced mosquito fish. T ourist number s ha ve gr own fr om 9000 in 1992-93 t o ov er 50,000 In 2012-13. The growth of human populations, consumption levels, and mobility is the root of most of the serious threats to biodiversity today. Rapid industrialization, urbanization, and growth in population have resulted in massive de… Log into your account. Ø Global warming is one of the major threat to global biodiversity. Notes. Biodiversity and Conservation Habitat Destruction or Loss Cause: Poisoning lakes, destroying forests for wood, clearcutting land. Biodiversity is not distributed evenly on Earth, and is richer in the tropics. Biodiversity Lecture Notes What we will discuss: o What is Biodiversity o Importance of Biodiversity o Types of Biodiversity o Threats to Biodiversity What is Biodiversity? What is Biodiversity? Biodiversity is fast depleting. The third results from increased mobility and trade. Threats to Biodiversity: An Overview. Topics include the threats from climate change and habitat loss, forms of industrial fishing, overfishing, and solutions for the problems that have co Diversus is Latin for various, or many. While learning about the negative impacts of humans on biodiversity, please keep a few things in mind. Syllabus. 4. Human demands on the world’s resources have led to one-third to one-half of the terrestrial planet being substantially altered by human activity. Describe several ways that species are being threatened with extinc- tion globally. ADVERTISEMENTS: Disturbance of any type in an ecosystem tend to reduce its biodiversity. Threats to biodiversity Even though India is one of the 17 identified mega diverse countries of the world, it faces lots of threats to its biodiversity. 5 the final driver of biodiversity loss is pollution. It is typically a measure of variation at the genetic, species and ecosystems level. Biggest threats today are the same as the biggest threats of the past. THREATS TO BIODIVERSITY. Some of the major causes that have resulted in the loss of biodiversity are mentioned below: The natural habitat of the ecosystem plays a major role in maintaining the ecological balance. FREE & DOWNLOADABLE Biology revision notes on Biodiversity. Topic: Threats to Biodiversity and Conserving Biodiversity. Chapter 16 Power Notes Answer key Section 16.1 Graph should be similar to that shown in Figure 16.1. Avg rating:3.0/5.0. Of these, 15 rain forests have been identified as hot spots. The term Biodiversity is made up of two words biological and diversity. More than 50 percent are estimated to exist in these areas. Biodiversity: 1. o What does this mean? Biodiversity may be defined as the variety and variability of living organisms and the ecological complexes in which they exist. 40% of the world’s amphibians; one-quarter of its mammals; and 14% of its birds are threatened with extinction. Presentation Summary : BIOMAGNIFICATION. Threats to biodiversity. Another major threat to biodiversity is climate change. Habitat destruction/Deforestation: Introduced and invasive species, Genetic pollution, Over exploitation, Hybridization, Climate change, Diseases and Human over-population. Invasion of alien species. Skeleton Notes: https://drive.google.com/open?id=0B8skq2Td9-KsZ2VzWTE0M0dZTUU Biological = Living organisms (plants and animals) Diversity = variety Species diversity number of species in a given area. asked Sep 17, 2016 in Environmental & Atmospheric Sciences by Chukuchuku. Biodiversity: concept, hotspots, threats to biodiversity by Biodiversity is defined as the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are a part; this includes diversity within species, between species, and of ecosystems. Lecture Notes: 2/8/02- Biodiversity Biodiversity - values • Economic – “direct” – e.g,. Man has begun to overuse or misuse most of these natural ecosystems. The IUCN Red List (2004) documents the extinction of 784 species in the last 500 years. Taking Nature’s Pulse concluded that of the six major stresses that threaten biodiversity in BC, the three most significant ones are ecosystem conversion, ecosystem degradation and alien species. Pollution, in particular from nutrients, such as nitrogen and phosphorus, is a growing threat on both land and in aquatic ecosystems. Habitat Loss and Deforestation. Specifically, it means the numerous different species in existence on our planet. The three main causes of threats to biodiversity namely, socio-economic, natural and anthropogenic are described as … 10 Some specific local issues for consideration in contextual lesson planning 11 5. Today, major loss to biodiversity in the world has been done by man. Learn more: Lecture Note in Threats to Biodiversity. All tour oper a tors pro viding visits to An tar ctica ar e member s of the IA TTO. excessive use of fertilisers --> pollution. Threats to Antarctica - notes. The first two of these are a direct result of human population growth and resource use. Ø … Biodiversity-Definition, types, importance, hotspots, threats and conservation The term biodiversity was coined as a contraction of biological diversity by E.O. Some of the main threats to biodiversity are: 1. There are various threats to biodiversity around the world. Lesson 6 - Threats to biodiversity: Effects of Habitat Destruction. Activities like deforestation such as kaingin, cutting down immature trees, throwing garbage on parts of water, killing endangered animals on the forest for selling purposes, are just few examples of … Advertisement Remove all ads. 16.4 Threats To Biodiversity Conservation practices focus on a few species but benefit entire ecosystems. BSCI 124 Lecture Notes ... LECTURE 37 - BIODIVERSITY & SPECIES EXTINCTION REQUIRED READING I. Biodiversity. A direct threat was recorded for about 40% of these reserves before they were acquired. Notes, Summer ... natives and invasives and impacts on and threats to biodiversity. Others (16-20) Another threats toward aquatic biodiversity, Tsunami : Different natural disaster has a different impact. Biodiversity is a positive thing. Threats to Biodiversity: Biodiversity is considered as a reservoir of resources to be used for the manufacture of food, medicine, industrial products, etc. Subject: Biology. The very existence of human being is threatened due to continuous loss of biodiversity. How biodiversity is threatened by the following? The pressure of human demand and pollution of environment damages the biotic components of natural systems. There are many threats to biodiversity that are prevailing today and one should know about them. Effect: Threatens native species and upsets the balance of nature; GREATEST threat to biodiversity clearing of tropical rain forests cutting forests for real estate 5.2 Threats to Biodiversity Chapter 5 Student Resource 6.1 Panther Problem and Quick Write 65-66 Student Resource 6.3 HIPPO Matrix 67-68 Student Resource 6.4 HIPPO Threats to Biodiversity 69-70 Student Resource 6.5 HIPPO Video Notes 71-72 Student Resource 6.6 Jigsaw Matrix for Invasive Species 73-74 Biological = Living organisms (plants and animals) Diversity = variety Species diversity number of species in a given area. An island with 2 bird species and 1 lizard species is more diverse than an island with 3 bird species. Unlike strom, tsunami also create a huge impact toward the aquatic biodiversity. Biodiversity is a reservoir of resources for the manufacture of food, cosmetic products and pharmaceuticals. Download Email Save Set your study reminders We will email you at these times to remind you to study. Wilson in 1985. 4 THREATS TO BIODIVERSITY Power Notes Why Biodiversity is Important: Decrease in an ecosystems biodiversity The following list provides a rundown of some of the main causes of biodiversity loss. The first two of these are a direct result of human population growth and resource use. Threats to Biodiversity. The greatest threat leading to the loss of biodiversity is the human race. Threats To Biodiversity. Climate change. Module: Human Geography. But with an increased demand of rapid population growth, biodiversity is gradually depleting. Biological magnification is when the concentration of a toxin increases in food chains from one level to the next. Introduced mallards, for instance, are driving the native Hawaiian duck to a sort of genetic extinction by breeding with them. v Extinction is a natural event and, from a geological perspective, routine.. v In last century, human impact has been so severe that thousands of species and varieties are becoming extinct annually.. v Some of the main causes are:. Biological means living and Diversity means variety and variability among living organisms. Threats to Biodiversity in the CFR 9 Want to know more? Major threats to biodiversity Though the problems of threats to biodiversity have been identified, the root causes of the problems will remain the same unless the problems are properly addressed. Designed by Save My Exams teachers for the 2019-21 CIE A Level (9700) exam. Disease as a Threat to Biodiversity. Biodiversity can be defined as the occurrence of different types of genes, gene pools, species, habitats and ecosystem in a given region. Description: Threats to Biodiversity Habitat Loss Happens when either natural disasters or human activities change the ecosystem so much that many species can no longer survive. Threats to the biodiversity of a region-. Bios in Ancient Greek means life. In fact, the rain forest covers only 7% of the earth’s geographical area but supports more than half of the world’s identified species. Considering the degree of threat to biodiversity around the world and the vital importance of biodiversity for living beings of which mankind is a major part, there is an urgent need to conserve biodiversity … Fragmentation of habitat. This means that a conflict exists between human needs and the conservation of biodiversity. Wilson Define and give examples of endangered and threatened species. Diversus is Latin for various, or many. 1. Number of Views: 1989. While learning about the negative impacts of humans on biodiversity, please keep a few things in mind. Advertisement Remove all ads. Landslides: When the mass of soil from mountain or cliff is sliding down to the ocean it is called as landslides. Major Threats to Biodiversity Soil erosion has been one of the factors which lead to the desertification and low productivity. * Human Activities. Threats to biodiversity: habitat loss and degradation of the environment. Genetic pollution:- genetic pollution occurs by uncontrolled hybridization. • Genetic pollution is detrimental to rare species that come into contact with more abundant ones. • Abundant species immediately colonize the new area, vanishing the rare species. What Schools can do: Biodiversity in Life Sciences 18 Activity 5.1 - A Biodiversity quiz 22 Activity 5.2 - A Biodiversity survey 23 By removing this habitat, human also threaten the survival of many different species of plants, animals, and other organisms. general-geography. Climate change is the recent rapid warming of the earth due in large part to the burning of fossil fuels which is creating too much carbon in the atmosphere. Threats to diversity - an essay by E.O. The three greatest proximate threats to biodiversity are habitat loss, overharvesting, and introduction of exotic species. Desertification, 4. But, it is under threat. – the habitat in which the species lives must be protected – other species are protected Overexploitation and agriculture are the biggest threats to wildlife. SWBAT describe how the decline of a single species can affect an entire ecosystem with 80% accuracy. A closer look at the drivers of biodiversity loss. Extinction of many species: The biodiversity of earth’s… And over all these threats is climate change which is already seriously impacting British Columbia and is the foremost threat to biodiversity. Threat s to Ant arctic a. T ourism and Scien tific Resear ch. Topics. Tropical deforestation will be the … Hunting of the wild animals for commercialization of their products has been a … 4.4 biodiversity at global, national and local levels 88 4.5 india as a mega diversity nation 89 4.6 hotspots of biodiversity 90 4.7 threats to biodiversity: habitat loss, poaching of wildlife, man-wildlife conflicts 91 4.8 endangered and endemic species of india 94 4.8.1 … A number of plants” and ani­mal species have already become extinct and many are endan­gered. Tropical rain forests have been the focal point of the debates on biodiversity conservation. Thus, major causes of threats to biodiversity as are follows: Related posts: Here is your short essay on Biodiversity Notes on Causes of Depletion of Biodiversity […] Apart from natural causes, human activities, both directly and indirectly are today’s main reason for habitat loss and biodiversity loss. alien species invasion on native species. - Global climate change - Change in a biotic elements of ecosystems leading to biotic change. Poaching: Specific threats to certain animals are related to large economic benefits. Note- Promotion of Vegetarianism is not a threat to biodiversity. Human society depends on biological resources, their diversity and the ecosystems that sustain them to provide essential goods and services. Threats of Biodiversity 1. Threats to biodiversity Even though India is one of the 17 identified mega diverse countries of the world, it faces lots of threats to its biodiversity. SECTION 2 - BIODIVERSITY AT RISK. Loss of Biodiversity. 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