This significant reduction in aquatic-to-terrestrial adaptive morphological constraints indicates that tetanocerine phylogenesis likely tracked some ecological pressures (e.g., increased aquatic predation and/or increased terrestrial food availability) more accurately than did more constrained lineages.
In summary, floodwaters faced by terrestrial plants invoke some common constraints of restricted gas exchange and lower light availability, but conditions (O2, CO2, light and temperature) differ between locations and times, posing variable challenges to plant functioning during submergence.
The influence of the number of control points (CPs) is analysed to confirm the performance and usability of the geometric constraints in real live terrestrial projects where far from ideal setups can exist across the survey.
The STEP method deals with the acquisition artefacts of point clouds from terrestrial LiDAR which include three important constraints: a varying sampling rate, signal occlusion, and the presence of noise.
One explanation for the high pinniped disparity is that evolution of an aquatic lifestyle released certain constraints acting on the terrestrial carnivoran skull.
Their results suggest that the cetacean Hr gene has experienced a significant relaxation of functional constraints during its evolution from terrestrial mammals and subsequent diversification, and probably lost its function, whereas the FGF5 was under a positive selection regime.
Thus, the shorter-wavelength near-surface anomalies from terrestrial, shipborne, and airborne magnetic surveys provide important constraints to augment lithospheric studies of the satellite magnetic data.
Among animals, only whales grow to a body mass larger than sauropods, but a direct comparison between these two groups is not very meaningful because of the fundamentally different constraints of the aquatic versus the terrestrial environment.
At one point, the ringworld Halo featured dinosaur-like terrestrial creatures, but these were dropped due to gameplay constraints.
Unlike terrestrial environments, where physical barriers and geography often put constraints on movement, most oceanic environments are less obstructed.
