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2007-12-31_REPORT - M1988044
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2007-12-31_REPORT - M1988044
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Last modified
8/24/2016 3:20:26 PM
Creation date
1/4/2008 10:56:35 AM
Metadata
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Template:
DRMS Permit Index
Permit No
M1988044
IBM Index Class Name
REPORT
Doc Date
12/31/2007
Doc Name
Annual Report
From
Southwestern Ecological Services
To
DRMS
Permit Index Doc Type
Annual Fee/Report
Media Type
D
Archive
No
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provides chazacterization of each species on each transect as well as over the entire exclosure and, <br />finally, for all woody plants over the entire exclosure. This nested results helps provide a useful look <br />at what contributes to the overall chazacter of the protected area. <br />The second part of the table shows a comparison of 2006 and 2007 results using the same <br />nested pattern. For this, the 2006 data was examined again to produce values that are consistent with <br />the 2007 analysis so they could be compared on a valid basis. Where the 2006 and 2007 sampling <br />methods differed, the 2006 data was adjusted to simulate the 2007 sampling method. Although direct <br />comparison of 2006 and 2007 results could be done, the results of a direct compazison are not <br />actually valid where sampling techniques differed. That is, where alternating square meter quadrats <br />were taken in 2006 and a continuous transect was used in 2007, the simple results from each are <br />actually not comparable because of the great difference in the actual azea sampled. With statistical <br />corrections though, comparison is valid if the corrected data from 2006 and the raw data from 2007 <br />are examined using the same formulas. <br />This year, cover values are based on that portion of each transect where woody vegetation is <br />encountered. Density is stated for both the woody vegetation portion of the transect as well as the <br />entire transect. This distinction is made this yeaz because in most of the exclosures, a significant part <br />of the transects would not generally be considered woody plant habitat. This mainly includes the <br />slopes that rise above the primary portions of the riparian comdor. As has been demonstrated many <br />times before at this site and other sites, often a change in elevation of just a few inches in these <br />riparian corridors can result in dramatic changes in the potential vegetation that can exist there at this <br />point in time. That can change as conditions change, but at this point in time side banks that are <br />included in the transects should not be considered in calculating cover or density as that is not <br />actually habitat for the species of interest. Nevertheless, side slopes must still be included in the data <br />analysis for two reasons. First, often the woody vegetation habitat starts at or very near the bottom of <br />the side slope. And second, these slopes should be included to monitor any changes in the point <br />where strictly bottomland species (woody or herbaceous) first occur. If this shifts in either direction <br />then it could be indicative of a change in the groundwater hydrology that is supporting the riparian <br />woody and herbaceous vegetation. Such changes, because of the high sensitivity of this vegetation to <br />hydrologic conditions, aze important to note especially if there is a sudden and unexpected change in <br />the desired vegetation. Suffice it to say, at this point, no changes have been noted in the boundary <br />between the strictly riparian and the adjacent, more elevated riparian habitats. But these boundaries <br />are noted with each sampling just in case there is a change. <br />Although other patterns are evident in these data, most of them, at this point, are of only a <br />general interest. One of these is the table row showing the "height SSD" which can be interesting and <br />quite revealing. This value is the sample standard deviation from the mean for the plant heights. <br />Where there is a wide range of heights as indicated in the table rows showing maximum and <br />minimum heights, the sample standard deviation can be quite large. But that situation can also <br />2007 Annual Report Coal Creek Wetland Mitigation Permit DA 198811488 Page 6 <br />
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