1. Describe the various ways extinction rates are measured, in other words how do we estimate...

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Biology

1. Describe the various ways extinction rates aremeasured, in other words how do we estimate the loss ofbiodiversity on our planet.
2. What are the principal threats to biodiversity?Describe the decline of two species in which multiple threats havecontributed to their decline.

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Answer for question 1An indirect method used to measure biodiversity loss isspeciesarea relationshipThis is by estimating the number of species found in a givenarea and how the number of species is increasing as the areaexpands By this method and conservation scientists h estimatedhow species will remain and disappear during habitat lossother methods is by measuring Species richness andevenness Simpsons index and ShannonWeiner Index beforeand after habitat lossSpecies Richness measure of the number ofdifferent kinds of organisms present in a particular areaEach species contributes one count to the total regardless ofwhether the species population is 1 or 1 millionSpecies Evenness measure of the relativeabundance of the different species making up the richness of anareaEvenness can be calculated as Relative abundance number See Answer

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