Idea: there is variation in climate from place to place: sunlight, wind, there is annual (year to year) and geographical (place to place) variation. Why are species not evenly distributed over the earth: a number of abiotic factors shape the ecological patterns we observe, the earth is round, some parts closer to sun, water, temperature, wind, salt concentration, ph. Seasonal variations: what causes seasonal change on earth, the earth"s i(cid:374)(cid:272)li(cid:374)atio(cid:374) (cid:272)auses the seaso(cid:374)al (cid:448)ariatio(cid:374)s i(cid:374) te(cid:373)perature, 23. 5 angle, variation in seasons will increase with latitude, ex. Ecological consequences of seasonal variability: change alters opportunity and success of species present, ex. Cold water freezes so wind cannot stir up nutrients for plants and stuff as much. Coriolis effect: deflection of winds clockwise in the. Precipitation mountain influences: moisture rich air is deflected upwards by mountains, air cools and moisture condenses on the west slopes, dry air moves over eastern slopes creating arid conditions.