The keyboard can type letters, numbers and punctuation, and also lets you control the computer, using special keys like the START button, and the arrow keys. A Dvorak keyboard is an alternative layout. A keyboard is most commonly attached to a computer via USB port.
3.0 Effects of temperature on aquatic biota. Temperature has long been recognized as an important environmental factor in both terrestrial and aquatic ecosystems in regard to its pivotal role over biological activity (development, growth and reproduction).emperature reductions to stream environments in winter may result from the loss of insulation of the forest canopy under clear-cut conditions in combination with increased radiant cooling; accelerated freezing may lead to anchor ice formation and minimize interstitial habitat for juvenile fish (Hicks et al.
Water temperature is one of the most important characteristics of an aquatic system, affecting: 1  Dissolved oxygen levels. 2  Chemical processes. 3  Biological processes. 4  Species composition of the aquatic ecosystem. 5  Water density and stratification. 6  Environmental cues for life-history stages.ater Quality Indicators: Temperature and Dissolved Oxygen. Water temperature is one of the most important characteristics of an aquatic system, affecting: 1  Dissolved oxygen levels. 2  The solubility of oxygen decreases as water temperature increases. 3  Chemical processes.