You are a conservation biologist and have just completed a conservation review p
ID: 178764 • Letter: Y
Question
You are a conservation biologist and have just completed a conservation review project focused on a single mammal species. You are taking your research in a new direction, looking for a study system with diverse species. You begin by evaluating four groups of potential study species, using data from the 2008 IUCN (International Union for Conservation of Nature) Red List of Threatened Species, shown in Table 1 below.
4. Complete Table 3 (your completed table will be referred to as Table 4). First, calculate the proportion of evaluated species that are threatened in each group. Next, calculate the estimated number of described species that are potentially threatened, based on the number of described species and the proportion of evaluated species that are threatened in each group. Round your estimated number of potentially threatened species to the nearest whole integer
Table 1 IUCN Red List of Threatened Species Number of species Number of species Number of species Group described evaluated threatened Vertebrates 61,259 5,966 26,604 6,161 2,496 Invertebrates 1,232,384 8,448 11,995 Plants 288,468 3 3 Lichen /Fungi 47,000 Source: Data from the 2008 IUCN Red List of Threatened Species, as reported in Vie et al. (2009).Explanation / Answer
Group
NO. of species described
No of species evaluated
No of species threatened
Proportion o species threatened
Proportion of evaluated species threatened
Vertebrates
61,259
26,604
5,966
9.7%
22.4% = 22%
Invertebrates
1,232,384
6,161
2,496
0.2%
40.5% = 41%
Plants
288,468
11,995
8,448
2.9%
70.4% = 70%
Lichens/Fungi
47,000
3
3
0.006%
100%
Group
NO. of species described
No of species evaluated
No of species threatened
Proportion o species threatened
Proportion of evaluated species threatened
Vertebrates
61,259
26,604
5,966
9.7%
22.4% = 22%
Invertebrates
1,232,384
6,161
2,496
0.2%
40.5% = 41%
Plants
288,468
11,995
8,448
2.9%
70.4% = 70%
Lichens/Fungi
47,000
3
3
0.006%
100%
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