Figure 52.8
-Park Grass study in Rothamstead,UK is the longest-running biological experiment.A series of plots (~1/3 ha each)with uniform soil and vegetation have been treated either with fertilizer,lime,or left as controls.Annually,researchers record plant species present.Based on the graphs above,which species increased and maintained high population size?

Question

Figure 52.8 
-Park Grass study in Rothamstead,UK is the longest-running biological experiment.A series of plots (~1/3 ha each)with uniform soil and vegetation have been treated either with fertilizer,lime,or left as controls.Annually,researchers record plant species present.Based on the graphs above,which species increased and maintained high population size?

Quizplus · Accepted Answer

According to the graph,Trifolium pratense shows an increase in population size over time (around 40 individuals/m2 in the 1950s to over 200 individuals/m2 in the 1990s) and maintained high population size throughout the observation period. Tragopogon pratensis and Conopodium majus populations show fluctuations over time, but do not have a clear increasing trend.

Figure 52.8 -Park Grass Study in Rothamstead,UK Is the Longest-Running Biological Experiment.A