Full document / COSOC-W-86-002 - the National Sea Grant Library

Full document / COSOC-W-86-002 - the National Sea Grant Library Full document / COSOC-W-86-002 - the National Sea Grant Library

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708 these projects. Our criteria for success must therefore be defined after the fact, and may not be the same as those envisioned by the contractor or regulatory agency. It is unlikely that a particular restoration project could meet all possible criteria for success, such as increasing productivity, providing habitat for particular species, controlling erosion, and improving water quality, without studies of conditions existing before the projects and a knowledge of natural population variability, it is difficult to evaluate habitat replacement—which is the goal usually suggested or Implied for restoration projects. Success can be defined in terms of plant survival of the species planted and how this provides for in-kind replacement of the plant species lost. However, even these criteria pose difficulties in defining success unless:

Table 2. Susaary of Information on selected e4tigatlon/r**tor4tlOn projecta In Taapa Bay. project Huw Habitat type called for In reatoratlon Pels Stiver Mangrove and Spartlna Roesono for reetoration erosion •itlqatlon Tine of reato ratlon Site of planted plot tha) wetland habitat loss thai Perma nent loop tha) Survival after 1 yr 1979 0.012 Unknown f 19 7 Archie Creek Spartlna Hitlostion 19JB 1.82 1.5 0 n 210 Fantasy Island and Spoil Island 2-o Hanqrove and Spartlna Sunkon Island Spartlna Habitat Mltlqation 1979 enhaneeeent Apollo Beach Hanqrove enforced oltlqatlon Branches Bexaaock Jnncqa oarsh Feather Cove Spartina enforced nltigation Harbor Island Hanqrove enforced oltlqatlon and I9«1 % Averaqe density at tlee of study per a? 2.11 2.1 f 7J.J« I 1978 1.64 a e 93.4 101 1974 1.6 110* 1 adnlnal 10-17 Mtlqatlon 1930 2.32 2.06 1.9 1981 and 1984 0.6 2.S 9 4 90 110 Soc -? 0 or 10 1974 10 10 0 9or ainlnal 0 Placido Bayou Spartlna Rltlqation 1981 1.0 1.0 0 » 70 31 Lasainq Park Gubtldal mi % survival for mangroves only D natural recruitment occurring slowly c « survival after 22 ao d % survival for 1984 planting Safety 198J 9.9 n/a n/a n/a n/a 163. * n/m Is not applicable ' pernenaat losses secured but areas can not be determined with existing data "• cannot be determined with existing data 0 S

708<br />

<strong>the</strong>se projects. Our criteria for success must <strong>the</strong>refore be defined<br />

after <strong>the</strong> fact, and may not be <strong>the</strong> same as those envisioned by <strong>the</strong><br />

contractor or regulatory agency. It is unlikely that a particular<br />

restoration project could meet all possible criteria for success,<br />

such as increasing productivity, providing habitat for particular<br />

species, controlling erosion, and improving water quality, without<br />

studies of conditions existing before <strong>the</strong> projects and a knowledge<br />

of natural population variability, it is difficult to evaluate<br />

habitat replacement—which is <strong>the</strong> goal usually suggested or Implied<br />

for restoration projects.<br />

Success can be defined in terms of plant survival of <strong>the</strong><br />

species planted and how this provides for in-kind replacement of <strong>the</strong><br />

plant species lost. However, even <strong>the</strong>se criteria pose difficulties<br />

in defining success unless:

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