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- Biodiversity: Values & Threats 1. In terms of the number of species in various taxonomic groups, what types of organisms represent thegreatest diversity on our planet? And how do we know we’re not “done” cataloging all of life on earth? 2. When scientists try to estimate the number of species that actually exist on earth today, why is thefigure so variable? 3. Describe the global biodiversity patterns found in relation these parameters:Latitude Precipitation Elevation 4. In a well-crafted paragraph (5-7 descriptive sentences) specifically describe 4 key ways thatbiodiversity benefits mankind. Use examples to support each of your statements.Explain how the three major types of deserts differin their climate and vegetation. Why are desert ecosystems vulnerable to long-term damage? How dodesert plants and animals survive? Explain how thethree major types of grasslands differ in their climateand vegetation. What is a savanna? Explain howsavanna animals survive seasonal variations in rainfall (Core Case Study). Why is the elephant an important component of the African savanna? DescribeTuy Sereivathana’s efforts to prevent elephants frombecoming extinct in Cambodia. Why have manyof the world’s temperate grasslands disappeared?Describe Arctic tundra and define permafrost?Explain how the three major types of forests differin their climate and vegetation. Why is biodiversityso high in tropical rain forests? Why do most soils intropical rain forests hold few plant nutrients. Whydo temperate deciduous forests typically have a thicklayer of decaying litter? What are coastal coniferousor temperate rain forests? How do most species…A large percentage pf living species on earth live in tropical rainforests of the world. Why are so many organisms able to inhabit the rainforest biome.
- Extinction is a natural phenomenon. It is estimated that 99% of all species that ever lived are now extinct. Why then do we say that we are now experiencing an extinction (loss of biodiversity) crisis? O Humans have greater medical needs than at any other time in history, and many potential medicinal compounds are being lost as plant species become extinct. Scientists have finally identified most of the species on Earth and are thus able to quantify the number of species becoming extinct. Most biodiversity hot spots have been destroyed by recent ecological disasters. The current rate of extinction is high and human activities threaten biodiversity at all levels. Humans are ethically responsible for protecting endangered species.please explain A drawback of the time hypothesis to explain the variation in species richness is that 1. Cannot account for algal diversity. 2. Fossils do not preserve well in the oceans. 3. Geological activity may interfere with species richness measurements. 4. It is not applicable to marine ecosystems because there was no glaciation in oceans. 5. Humans significantly modified marine environments.Which of the following best describes the trend of biodiversity on the Earth's surface? * O It decreases towards the equator It increases towards the equator O It remains the same throughout the planet O It is not affected by the change in latitude Which is NOTa characteristic of a biodiversity hotspot? * O High species biodiversity High urban development O High endemic species population O High susceptibility to habitat destruction
- Around Wisconsin we see six types of prairie communities (Short grass, Mesic tall grass etc.). This is an example of what type of biodiversity? O Functional Diversity O Ecosystem Diversity O Genetic Diversity O Species DiversityCA least tern ENDANGERED ANIMAL is CA least tern questionbases on the bird CA least term Reasons for Endangerment Explain the various factors that have led to this species’ current plight. Expand on these points individually, based on your species’ unique story. Domino Effects As we’ve learned, species are not islands unto themselves; they are integrated with many other organisms in trophic relationships, mutualisms, competition, etc. How is the absence of this species (or its lowered population size) likely to impact the other members of its habitat? (If findings specific to this point are available, please include them – otherwise, I’m asking you to speculate based on what you’ve learned about the biology of this organism.) Conservation Efforts Discuss past, current, and proposed efforts to conserve this species. Are these strategies effective? Are they realistic? What is the outlook for this organism?Why do you think Costa Rica (Core Case Study) hasset aside a much larger percentage of its land for biodiversity conservation than the United States has?Should the United States reserve more of its land forthis purpose? Explain
- Mass extinction has never been documented to occur before occurs often, with rapid recovery of species diversity has occurred five times in the past, but is occurring more quickly this time O has occurred once before due to human activities cannot be distinguished from background extinction ratesQuestion 4 How would fire suppression in western states impact habitat diversity? O habitat diversity would increase because fire destruction is being limited O habitat diversity would increase because fire kills resistant species O habitat diversity would decrease because less fire disturbance means higher levels of colonizer species O habitat diversity would decrease because the forest would all be at the same level of succession A Moving to another question will save this response. ts fe 12 米 esc 23 24 & 4. 8 Q W E tab F G H caps lock A B # M と不Nature is declining globally at rates unprecedented in human history – and the rate of species extinctions is accelerating, with grave impacts on people around the world. Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. (i) Greater species diversity ensures natural sustainability for all life forms. Discuss. (ii) How can the loss of biodiversity be prevented?