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DTIC ADA056000: A Comparison of Plant Succession and Bird Utilizati... |
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by Defense Technical Information Center |
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This project consisted of a comparison of plant |
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succession and bird utilization on diked and undiked |
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dredged material islands in North Carolina estuaries. |
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After a site is diked, deposition of dredged material may |
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be delayed for several years or it may occur immediately. |
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Unfilled diked islands that were studied had a complex |
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topographic zonation. Plant succession was highly |
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variable on these unfilled sites, with topography, |
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substrate particle size, and availability of water being |
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major causative factors. Plant succession on diked and |
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filled sites was similar to that on undiked islands |
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except that dikes tended to vegetate more quickly than |
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did the deposits on outer portions of undiked sites. Only |
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the least and gull-billed terns were found nesting |
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predominantly on diked sites, with most nesting gulls and |
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terns locating the majority of their breeding colonies on |
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undiked sites. Fifteen to 30 years will be required for |
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thickets suitable for wading bird colonies to develop on |
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diked islands in North Carolina. Based on observations in |
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New Jersey, it is expected that wading birds will use |
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diked sites when appropriate habitat becomes available. |
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No positive values of dikes relative to nesting colonial |
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birds were discovered. One hundred forty-two species of |
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shorebirds, waterfowl, and land birds were recorded on |
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diked islands, while 94 species were found on undiked |
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sites. Heaviest use was during fall migration. The |
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increased avian diversity of diked over undiked sites |
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paralleled the increased temporary diversity of habitats |
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on diked sites. |
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Date Published: 2017-06-06 07:24:25 |
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Identifier: DTIC_ADA056000 |
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Item Size: 198761571 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; Parnell, James F ; NORT... |
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