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.
Spanning the border from Minnesota into the Canadian provinces of Ontario and Manitoba, Lake of the Woods is an enormous body of water over 68 miles long, 59 miles wide, with 25,000 miles of shoreline-the world's longest lake shoreline.