Final answer:
Tansley's experiments showed that the bedstraw species adapted to acidic soils could exclude those adapted to calcareous soils when grown on acidic soils, illustrating the importance of species adaptation to specific environmental conditions.
Step-by-step explanation:
The experiments by Tansley with bedstraw plants is an example of how different species are adapted to different soil conditions. The finding from these experiments is that the species restricted to acidic soils excluded the species that was adapted to calcareous soils when grown on acidic soils. This implies a competition where one species has an advantage in a specific environment, which leads to the exclusion of the other species not adapted to those conditions. The planting of the same species on its non-native soil where it is not adapted did not typically result in successful growth, indicating that the species that grew on calcareous soils was not physiologically capable of growing on acidic soils, and vice versa.
It's important to understand the adaptations different plants have made to survive in various environments. For example, bryophytes are limited in their ability to transport water and nutrients due to their lack of vascular tissue, and carnivorous plants, which typically grow in nutrient-poor soils, have adapted by obtaining nutrients from trapping and digesting insects and other small creatures. Similarly, the soil preference of crickets has led to speciation due to their different habitat preferences, resulting in genetic isolation even when populations are in close proximity.