Answer :
To describe how the relative Thomson's gazelle density changes over time in relation to the changes in the relative wildebeest density and grass height, we can consider the following scenario:
1. **Initial State**:
- Initially, let's say there is an abundance of grass, which supports a high density of both Thomson's gazelles and wildebeests.
- The relative densities of both species are high as there is plenty of food available.
2. **Grass Height Decreases**:
- If the grass height decreases due to seasonal changes or overgrazing, it might impact the wildebeests more significantly than the Thomson's gazelles.
- Wildebeests are bulk grazers and require more grass to sustain themselves compared to Thomson's gazelles.
- As the grass height decreases, the wildebeest population might decline due to food scarcity, leading to a decrease in their relative density.
3. **Thomson's Gazelle Response**:
- Thomson's gazelles, being more selective grazers and able to survive on shorter grass, may not be as severely affected by the decrease in grass height.
- Their relative density might remain stable or even increase as they can adapt to the changes better than wildebeests.
4. **Inter-Species Competition**:
- With a decrease in wildebeest density, there might be less competition for food resources among Thomson's gazelles.
- This reduced competition could also contribute to the stability or increase in the relative density of Thomson's gazelles.
5. **Overall Impact**:
- Therefore, over time, the relative Thomson's gazelle density may show either stability or an increase in relation to the changes in wildebeest density and grass height.
In conclusion, the relative Thomson's gazelle density can be influenced by the interplay between changes in wildebeest density and grass height. Their ability to adapt to varying food availability and competition dynamics can lead to different patterns in their relative density compared to wildebeests.
