Grant (1986) proposed a three-step process to speciation to explain the adaptive radiation of the group: (i) The ancestral species arrives in the archipelago; (ii) the species spreads to other islands and as a result of this, there will probably be some selection and hence differentiation in size because the islands are different; and (iii) members of the original and derived populations encounter each other, and as a result of competition for food and selection against intermediates ...
Manitoba Geography. Known by sportsmen as the Province of Lakes, Manitoba is mostly flat land, with some hills and small mountains southwest.he Duck Mountains include Manitoba's highest point, Baldy Mountain, 831 m (2,727 ft.). Manitoba is blanketed by rivers and hundreds of lakes, especially central and south. At 24,514 sq km (9,465 sq mi) Lake Winnipeg is the fifth-largest lake in Canada, larger in fact than Lake Ontario of Great Lakes fame.
For other uses, see Winnipeg (disambiguation). Winnipeg (/ËwÉªnÉªpÉÉ¡/) is the capital and largest city of the province of Manitoba in Canada. It is located near the longitudinal centre of North America and is 110 kilometres (68 mi) from the U.S. border. It is also the place of the confluence of the Red and Assiniboine Rivers.