Biodiversity and populations — Question 12

12a)

$•\,\mathrm{s}\mathrm{h}\mathrm{o}\mathrm{w}\mathrm{s}\,\mathrm{s}\mathrm{u}\mathrm{b}\mathrm{s}\mathrm{t}\mathrm{i}\mathrm{t}\mathrm{u}\mathrm{t}\mathrm{i}\mathrm{o}\mathrm{n}\,\mathrm{c}\mathrm{o}\mathrm{r}\mathrm{r}\mathrm{e}\mathrm{c}\mathrm{t}\mathrm{l}\mathrm{y}\,\mathrm{p}\mathrm{e}\mathrm{r}\mathrm{f}\mathrm{o}\mathrm{r}\mathrm{m}\mathrm{e}\mathrm{d}$

$[1\,\mathrm{m}\mathrm{a}\mathrm{r}\mathrm{k}]$

$•\,\mathrm{d}\mathrm{e}\mathrm{t}\mathrm{e}\mathrm{r}\mathrm{m}\mathrm{i}\mathrm{n}\mathrm{e}\mathrm{s}\,\mathrm{S}\mathrm{D}\mathrm{I}\,=\,0.19\,[1\,\mathrm{m}\mathrm{a}\mathrm{r}\mathrm{k}]$

12b)

Area 2 has lower SDI than Area 1. While the communities’ total populations are similar (94 to 98), Area 2 has a species that is dominant (Yellow mangroves) which causes the SDI in Area 2 to be much lower than Area 1.

• states a relevant similarity [1 mark]

• states a relevant difference [1 mark]

• states the significance of the identified differences [1 mark]