the population of the species falls below a critical level; Biodiversity. The cell cycle including G1 (in which some organelles are replicated), S phase (in which DNA is replicated) and G2 then mitosis. Genetic engineering involves the transfer of genes from one organism to (usually) an unrelated species. Read first: Gaston, K.J. What is biodiversity? But when it loses too much, it hits a tipping point and falls off a cliff. Documenting spatial patterns in biodiversity is difficult because taxonomic, functional, trophic, genetic, and other dimensions of biodiversity have been relatively poorly quantified. This of it like this. There is a growing recognition that the level of biodiversity is an important factor in influencing the resilience of ecosystems to disturbance. Understanding how biodiversity evolved and is evolving on Earth and how to correctly use and interpret biodiversity data is important for all students interested in conservation biology and ecology, whether they pursue careers in academia or as policy makers and other professionals (students graduating from our programs do both). Biodiversity, also called biological diversity, the variety of life found in a place on Earth or, often, the total variety of life on Earth. It is a very broad and diverse field. We have moved all content for this concept to for better organization. It may not be clear why biologists are concerned about biodiversity loss. An example would be certain types of moss since they can indicate the level of nutrition in the soil and the acidity. Indirect use (1). ‘Biodiversity’ comes from two words: ‘biological’, which means relating to biology or living organisms, and ‘diversity’, meaning a range of different things or variety. A common measure of this variety, called species richness, is the count of species in an area. I would aim to include the following: 1. Please update your bookmarks accordingly. Both processes often make use of bacteria because of their ability to make complex molecules (eg. Biodiversity or biological diversity is a term that describes the variety of living beings on earth. Human activities like changing land use, deforestation and peat bog destruction reduce this. It … So you want to study biology…Duh! Biodiversity is variation at … The more biodiversity, the stronger the ecosystem, the better it functions, and the better it can adapt to changes. It enables the population to adapt to its environment and respond to natural selection. Both species diversity and genetic diversity are important within a habitat, because they make it more likely that the habitat can adapt successfully to changing conditions. Module 23: Ecology. Biodiversity is a broad term for biological variety, and it can be measured at a number of organizational levels. Biodiversity. In fact, I consider it as the science of the 21st century. ecosystem that they are in and are extremely important in the function and structure of that ecosystem. Biodiversity is important, more than just the 'I want my children to enjoy it' reason. Productive use: Ø Products commercially harvested from biodiversity for exchange in market. Best CBD Oil for Anxiety We provide detailed revision materials for A-Level Biology students and teachers. Biodiversity is often a topic used in A level biology to introduce ecology, providing ample opportunities to undertake practical investigations, compile results which can be analysed using species diversity index and subsequently interpreted to compare particular habitats. Biodiversity is a measure of how many different species live in an ecosystem. Biodiversity is increased by genetic change and evolutionary processes and reduced by habitat destruction, population decline and extinction. It is important in natural as well as artificial ecosystems. The current high rates will cause a precipitous decline in the biodiversity of the planet in the next century or two. Biodiversity is a broad term for biological variety, and it can be measured at a number of organizational levels. Uses of biodiversity: Ø Biodiversity, besides its ecological significance, provides a socio-economic asset to the nation. This is a fully editable PowerPoint presentation designed specifically for the new Edexcel A Level Biology B Specification for first teaching in 2015. We value biodiversity for many reasons, some utilitarian, some intrinsic. Biodiversity is important to most aspects of our lives. Traditionally, ecologists have measured biodiversity by taking into account both the number of species and the number of individuals in each of those species. Traditionally, ecologists have measured biodiversity by taking into account both the number of species and the number of individuals in each of those species. Biology II. A-Level Biology does pretty much what it says on the tin. * Biodiversity also refers to number of different species living in a particular region. A threat to biodiversity poses a threat to humankind. It covers the whole of Topic 3 which is Classification and Biodiversity. Without biodiversity, life would not sustain. Biodiversity is good for the economy. 5.3 Importance of Biodiversity The Biodiversity Crisis. means having as wide a range of different species in an ecosystem as possible. The number of tigers has plunged by 97% in the last century. Biodiversity is also considered by many to have intrinsic value—that is, each species has a value and a right to exist, whether or not it is known to have value to humans. Altogether, the food, commercial forestry and ecotourism industries could lose US$ 338 billion per year if the loss of biodiversity continues at its current pace. Cycles occur all over biology and this is a good example of a question where you should be able to mention an extensive range of subjects. Even knowledge of taxonomic diversity, the best known dimension of biodiversity, is incomplete and strongly biased toward the species level, megafauna, temperate systems, and components used by people. Having a low biodiversity isn’t necessarily an issue. Each specification objective is covered in just the right amount of detail with clear diagrams and clever slide animations. Ecological diversity (or biodiversity) is the total amount of variety within life on earth. This means we value biodiversity both for what it provides to humans, and for the value it has in its own right. They are present abundantly in every living cell. Biology is the study of life. How does biodiversity vary spatially across the globe? Why not? Ø Uses related to biodiversity can be grouped into three categories: (1). Proteins are the most abundant organic molecules present on earth. Genetic diversity: It refers to the variation in gene within a species. These three levels work together to create the complexity of life on Earth. An example of a keystone species is a shark. Diversity in marine habitats Where is biodiversity highest and lowest? proteins) and their […] Genetic diversity is the variety of genes within a species. The natural disaster prevention mechanisms in most ecosystems and other free services we all get from the surrounding environment are not easily replaceable or replicable, so maintaining biodiversity is important. What is biodiversity and why does it matter to us? Consumptive use (3). Biodiversity refers to the variety and variability of life on Earth. Over 22,000 learners have used our materials to pass their exams. This A-Level Biology section of Revision Science explains biodiversity classification including examples. That would be ridiculous. So really, the important shift here is to stop thinking of the planet as a physical system but as a linked biological and physical system. That’s why an ecosystem that’s losing biodiversity only declines slowly at first. Without biodiversity, all humans would basically be clones of each other. Biological diversity or biodiversity refers to the variety of organisms that exist on the earth, their interrelationships as well as their relationship with the environment. It is a natural science. Long chains of amino acids known as polypeptides fold around themselves in several ways to form complex structures called proteins. It can be the cause of various grave problems like pollution, habitat loss, resource exploitation, climate change, species extinction, disease outbreak, and so on. Also, it boosts the productivity of ecosystems because each organism has a specific job.. A bunch of different organisms all having different abilities is more effective than having a group of identical organisms wandering around and only having the ability to do one job. 2000, Global patterns in biodiversity, Nature, 405, 220-227 The paper by Gaston (2000) is an excellent place to start researching the spatial patterns of biodiversity, and some of the theories proposed to explain these patterns. Biodiversity is important to humans for many reasons. The number of animals living on the Earth has plunged by half since 1970. At least 40 percent of the world’s economy and 80 percent of the needs of the poor are derived from biological resources. Productive use (2). Why Biodiversity is Essential for Sustainable Development. Search for: The Importance of Biodiversity to Human Life. For economic and various life support reasons, it is very important to protect and preserve biodiversity. There are three levels of biodiversity: 1. 20.1) Biotechnology and genetic engineering Biotechnology is the application of biological organisms, systems or processes to manufacturing and service industries. The term biodiversity was coined in 1985. Biologists estimate that species extinctions are currently 500–1000 times the normal, or background, rate seen previously in Earth’s history. Proteins are the polymers made up of thousands of amino acids linked via peptide bonds. It is the most complex and important feature of our planet. Genetic diversity. Discusses the benefits of biodiversity. An indicator species is a species that serves as a measure to the abiotic and biotic factors of the ecosystem. Biodiversity is usually explored at three levels - genetic diversity, species diversity and ecosystem diversity. For example deserts and arctic regions naturally have low a biodiversity due to the harsh environment. Biodiversity describes the richness and variety of life on earth. 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