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<br /> <br />CHAPTER 3: MODlPICATlONS OF UPPER MISSISSIPPI RIVER AND EFFECTS ON FLOODPLAIN FORESTS 37 <br /> <br /> <br />1989 <br /> <br />1891 <br /> <br />2 0 <br />I ~ ~' <br /> <br />,~~, , <br />101 <br /> <br />Figure 3-(i. Changes in land cover/land use, Pool 26. upper Mississippi River, 1891-1989. <br /> <br />0 ""'"w_ <br />. WoodyTr:rreetriIl <br />D .......'" <br />.. <br />. """"""- <br />!Ill ..... <br />fi9 """"""'" <br />~ """"" <br /> <br />-+- <br /> <br />KILOMElERS <br />2 4 <br />, , <br /> <br />, , <br />234 <br />MIUlS <br /> <br />, <br />7 <br /> <br />newly deposiled areas will become farmland. others will <br />likely be colonized wilh forests, We predicI thaI changes <br />occuning in the Missouri River will similarly occur within <br />the open-river reach of the UMR. While existing cotton- <br />wood-willow-sycamore stands are changing toward transi- <br />tional silver maple-box elder forests. few new stands of <br /> <br />collonwood-willow-sycamore will be created through natu- <br />ral regeneralion. The end result will be a probable draslic <br />reduction of pioneer collonwood-willow-sycamore slands, <br />while the IOlal acres of forests may increase slightly. <br />Because the impounded reaches of the UMR with their <br />levees. wing dams. and revetments have less extensive lat- <br />