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A Natural Areas Inventory of the - Kansas Natural Heritage Inventory ...

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green ash seedlings, and silver maple (Acer saccharinum L.) seedlings. Tree seedlings have<br />

since grown into thickets <strong>of</strong> young saplings, which in many instances shade out most herbaceous<br />

cover. While no pecan saplings were recorded in plots ei<strong>the</strong>r during <strong>the</strong> 1995–1996 or 2003 field<br />

seasons, younger pecan trees do occur in areas southwest <strong>of</strong> <strong>the</strong> older forest. Thus, it appears<br />

some recruitment <strong>of</strong> this co-dominant may be occurring. It is not clear if <strong>the</strong> dramatic increase in<br />

<strong>the</strong> amount <strong>of</strong> bare ground in 2003 as compared to <strong>the</strong> 1995–1996 field seasons was <strong>the</strong> result <strong>of</strong><br />

phenological differences, recent drought conditions that affected <strong>the</strong> survival <strong>of</strong> understory<br />

species, or some o<strong>the</strong>r factor. It was observed in all forest types.<br />

TABLE 2.5. Average cover (%) <strong>of</strong> understory species in <strong>the</strong> Pecan-Hackberry Floodplain Forest<br />

in 1995–1996 and 2003. Empty cell indicates species not recorded. Total average covers are<br />

approximate due to rounding.<br />

Genus Species Common Name<br />

1995-‘96<br />

Cover (%)<br />

(n = 24)<br />

2003<br />

Cover (%)<br />

(n = 12)<br />

Acalypha virginica Virginia copperleaf 0.2<br />

Acer negundo boxelder 14.6<br />

Acer saccharinum silver maple 4.2<br />

Agastache nepetoides catnip giant-hyssop 0.3<br />

Ageratina altissima tall snakeroot

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