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Keystone species | What is keystone species ? | 2020

Welcome to biogalaxy online #ecology#communityecology#biology This video explains following topics: 1.What is keystone species ? 2.Define keystone species. 3.Examples of keystone species. 4.Explanation of the concept of keystone species. 5.Robert T.Paine's research based explanation of keystone species. 6.Why starfishes act as keystone species ? 7.Why sea otters are called keystone species? 8.Why African elephants are called keystone species ? Keystone species are those that have a disproportionately large impact on their community or ecosystem relative to their abundance (Power et al., 1996). An alternative form of the same idea is that some species are strong interactors. The term keystone species has been used loosely in the ecological literature, so claims that a species is a keystone species should be viewed with caution. Identifying keystone species requires knowledge of the particular system of study and the organisms found in it. The entire ecosystem is defined by the term Keystone species. In other words, we can say these species have played very important role in maintaining the structure of an ecological community. The concept of the keystone species was introduced in 1969 by the zoologist Robert T. Paine. He develops the concept to explain his observations and experiments on the relationships between marine invertebrates of the intertidal zone (between the high and low tide lines), including starfish and mussels. For Example- The starfish Pisaster ochraceus is a keystone species in the rocky marine intertidal communities off the northwest coast of North America. This predatory starfish feeds on the mussel Mytilus californianus and is responsible for maintaining much of the local diversity of species within certain communities. If starfish removed from the coast of North America then think about it on the mussel populations. The over populated mussel will covered the rocky intertidal shores which will disturbed the other species to grow. Hence, we can say that the concept of the Keystone species describes particularly strong interspecies interactions, and for allowing easier communication between ecologists and conservation policy-makers. All the interactions are likely to work simultaneously and their combinations give rise to well-defined indirect interactions such as the tropics cascades that result from the loss of a keystone predator. Sea otters are a keystone species, meaning their role in their environment has a greater effect than other species. As top predators, sea otters are critical to maintaining the balance of nearshore ecosystems, such as kelp forests, embayments and estuaries. Without sea otters, sea urchins can overpopulate the sea floor and devour the kelp forests that provide cover and food for many other marine animals. By maintaining healthy kelp forests, sea otters also indirectly help to reduce levels of atmospheric carbon dioxide, a prevalent greenhouse gas, as kelp absorbs and sequesters carbon. Elephants also function as a keystone species. The ecological processes and interactions within ecosystems are dependent on keystone species such as elephants. Elephants play an invaluable role in their ecosystem, shaping the landscape in front of them and allowing others to thrive. ???????????????? About this channel- This channel is built for biology enthusiasts or students like you with dreams to pursue.We provide world-class free biology lectures related to multiple biology fields like microbiology,marine biology, molecular biology, ecology,biotechnology, forensic science, zoology, botany,life science and so on. If you are a biology student ,biology enthusiast or studying in high school or a college undergraduate in life sciences(studying zoology,botany,physiology,microbiology etc.), preparing for civil services or competitive exams (NEET,NTSE, KVPY, RAILWAY,IELTS,CLAT,DSSSB,HSSC,SSC etc.),this channel is just an one stop destination for all your biology lectures.?????????????????? Benefits of Subscribing to Our Channel ??Teachers with More than 10 years+ Teaching Experience. ??Exam Preparation Tips & tricks. ??High quality video lectures to develop crystal clear conception. ??Motivational videos for students ??Success tips for competitive examinations. ??Career counselling. ?????????????????????????? Disclaimer :- This video is for educational purpose only.Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use. ????????????????Follow our facebook page

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Ecology:   |  biodiversity  |  habitat  |  niche  |  niche construction  |  biome  |  biosphere  |  individual ecology  |  population ecology  |  ecosystem  |  keystone species
Pollution:   |  air pollution  |  light pollution  |  littering  |  noise  |  radioactive  |  water pollution
Sustainability:   |  social  |  economic  |  environment  |  organizations  |  sustainable development  |  sustainable life
Environment:   |  environmental education  |  recycling  |  environmental health  |  conservation  |  animals  |  forests  |  ecosystems  |  clean energy
Climate-change:   |  atmosphere  |  cfcs  |  greenhouse gases  |  NASA  |  glaciers  |  carbon emission  |  solar output