Concept explainers
To fill:
The blanks in the given figure.
Introduction:
Extinction vortex is a model that helps the ecologists, biologists, and geneticists to determine the reason for the extinction of the species. This model reveals the causes that lead to the vulnerability of the small populations, as they spiral toward the extinction. This model was developed by M. E. Gilpin and M. E Soule in 1986.
Answer to Problem 1LTB
The figure below is labeled as:
Explanation of Solution
The given figures are the depiction of a graph which determines the amount of biomass of grass population transferred to mountain lions. The grass is an autotroph and makes its own food by the help of photosynthesis. When deer eat this grass, then only 10% of the energy in the grass is transferred to the deer. Further, when the lion eats the deer, then again, only 10% of the energy taken by the deer is transferred to the mountain lion.
The figure below is labeled as:
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Chapter 16 Solutions
BELK SCIENCE F/LIFE-MASTRG. BIOL.AC+EBK
- Which of the following methods will provide information to an ecologist about both the size and density of a population? a. mark and recapture b. mark and release c. quadrat d. life tablearrow_forwardComplete the following graph by labeling each bar (a-e) with a cause of extinction, from the most influential to the least influential. а. b. C. d. е. O 20 40 60 80 100 % Species Affected by Threatarrow_forwardUse the Shannon-Weiner Diversity equation to calculate diversity (H). Which treatment (predator enclosure, no predator enclosure) is more diverse? Why do you think this is the case? Predator Enclosure: Species Number A 5 B 1 C 4 D 2 E 12 No Predator Enclosure: Species Number A 7 B 9 C 17 D 3arrow_forward
- Suggest some possible reasons for the changes in beetle populations shown in the graph. Explain why these interpretations are not as reliable as the data itself.arrow_forwardA population of 300 fairy wrens colonizes a cloud forest without any other wrens in it. The cloud forest has a carrying capacity of 500 wrens. Fairy wrens have a maximum potential growth rate of 80%. How large will the fairy wren population be in two years (rounded to the nearest whole wren)? ***note that the current time frame is year 0. You will have to calculate years 1, and 2. 462 429 405 492arrow_forwardPlot survivorship curves for all three species illustrated in Table 1 on a single graph. Label the axes and provide a clear legend convert it and make use of legend, so for the first species it would be 6months=1unit, then for the second species 1yr=1unit, and the third species would be 50yrs=1unitarrow_forward
- what is background extinction ratearrow_forwardChange in Rabbit Population 1850-2000 100 90 80 70 60 50 40 30 20 10 white gray white gray 1850 2000 In 1850 there was a large snowshoe rabbit population in Manitoba, Canada. Over the years, the winter coloration (the color of the rabbit's fur) of the surviving rabbit population changed. The graph shows the change in winter coloration of rabbits between 185 to 2000. Based on the data, we could hypothesize that A) the winters are longer in length. B) the snowshoe rabbit has migrated to another area. the amount of snow cover varied over the years. D) more snowshoe rabbit predators have moved into Manitoba. % Populationarrow_forwardHumans are beginning to fragment populations more and more: which population structure is most useful in highly fragmented habitats that used to represent one large habitat? A. Source and sink modelsB. MetapopulationsC. Linear Stepping StoneD. Two dimensional stepping stone Which is typically the most appropriate population structure model when you are focusing on a remote, single island? A: Source and sink modelsB: MetapopulationsC: Linear Stepping StoneD: Two dimensional stepping stonearrow_forward
- Examine the statements below and score them as true or false. 1. According to the MacArthur-Wilson theory of island biogeography, the immigration curve starts out steep but gets progressively shallower. 2. The extinction curve also starts out steeply but quickly declines. 3. Extinction rates are lower on larger islands. 4. The numbers of species should increase with increasing distance from the mainland. (Click to select) v (Click to select) (Click to select) (Click to select) v 5. There should be considerable turnover of species on islands. (Click to select)arrow_forwardBeetle populations is shown in the graph. Explain why these interpretations are not as reliable as the data itself.arrow_forwardExtinction Match the following items. NOTE: If you want to change your selection, you'll need to delete the one you already chose. After you delete it, the list of choices will pop back up and you can make a different choice. Sudden, dramatic loss of biodiversity mass extinction Routine loss of biodiversity; about 1 per million species years background extinctionarrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College