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043 a| n-us-ca;

049 a| ERE#;

050 14 a| TC203b| .U581mr no. 78-3;

074 a| 334-A-20 (microfiche);

086 0 a| D 103.42/8:78-3;

100 1 a| Johnson, G. F.=| ^A1058737;

245 10 a| Ecological effects of an artificial island, Rincon Island, Punta Gorda, California /c| by G.F. Johnson and L.A. deWit ; prepared for U.S. Army Corps of Engineers, Coastal Engineering Research Center.;

300 a| 108 pages :b| illustrations ;c| 27 cm.;

336 a| text2| rdacontent;

337 a| unmediated2| rdamedia;

338 a| volume2| rdacarrier;

490 1 a| Miscellaneous report ;v| no. 78-3;

500 a| Cover title.;

500 a| "September 1978.";

504 a| Bibliography: p. 64-65.;

506 a| APPROVED FOR PUBLIC RELEASE;

520 a| This study documents marine ecological conditions at Rincon Island, located approximately 0.8 kilometer offshore between Ventura and Santa Barbara, California, in a depth of 14 meters. The island, which was constructed between 1957 and 1958 to serve as a permanent platform for oil and gas production, is particularly suitable for ecological study. Habitat features associated with the armor rock and concrete tetrapods surrounding the island support a 'microecosystem' which differs in biotic composition from surrounding natural bottom areas. A major part of the study was devoted to analysis of seasonal dynamics in biotic composition. Permanent transects extending from the high intertidal to natural bottom were established normal to each of the four cardinal sides of the island. All macrobiota were censused in duplicate 1-square meter quadrats along each transect during each of the four seasons. Data analysis indicated that many species exhibit significant variability in abundance from one season to the next. In general, the findings indicate a rich and varied fauna and flora associated with the high-relief solid substrate of Rincon Island which differs substantially from the more depauperate natural bottom habitats in the area.;

650 0 a| Offshore structures.=| ^A90597;

650 0 a| Marine sedimentsz| Californiaz| Ventura.=| ^A19926;

650 0 a| Ecologyz| Californiaz| Ventura.=| ^A164;

650 17 a| Geography.2| scgdst;

650 27 a| Ecology.2| scgdst;

650 17 a| Manmade.2| dtict;

650 17 a| California.2| dtict;

650 17 a| Islands.2| dtict;

650 17 a| Ecology.2| dtict;

650 27 a| Shallow water.2| dtict;

650 27 a| Platforms.2| dtict;

650 27 a| Ecosystems.2| dtict;

650 27 a| Marine biology.2| dtict;

650 27 a| Aquatic organisms.2| dtict;

650 27 a| Sediments.2| dtict;

653 2 a| Rincon Island;

653 2 a| LPN-DAG-31532;

700 1 a| DeWit, L. A.=| ^A1067287;

710 2 a| Coastal Engineering Research Center (U.S.)=| ^A46903;

830 0 a| Miscellaneous report (Coastal Engineering Research Center (U.S.)) ;v| no. 78-3.=| ^A132932;

949 a| D 103.42/8:78-3w| SUDOCh| JOYNER38o| jmpli| 30372016456763;

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999 a| D 103.42/8:78-3w| SUDOCc| 1i| 30372016456763l| JDOSm| JOYNERr| Ys| Yt| JDOSBKu| 2/8/2012x| BOOKz| JFEDDOCSo| .STAFF. jmpl;

Ecological effects of an artificial island, Rincon Island, Punta Gorda, California / by G.F. Johnson and L.A. deWit ; prepared for U.S. Army Corps of Engineers, Coastal Engineering Research Center.

Author/creator	Johnson, G. F.
Other author	DeWit, L. A.
Other author	Coastal Engineering Research Center (U.S.)
Format	Book
Publication Info	Fort Belvoir, Va. : The Center ; Springfield, Va. : Available from National Technical Information Service, [1978]
Description	108 pages : illustrations ; 27 cm.
Subjects	Offshore structures. Marine sediments--California. --Ventura. Ecology--California. --Ventura.

Series	Miscellaneous report ; no. 78-3 Miscellaneous report (Coastal Engineering Research Center (U.S.)) ; no. 78-3. ^A132932
Abstract	This study documents marine ecological conditions at Rincon Island, located approximately 0.8 kilometer offshore between Ventura and Santa Barbara, California, in a depth of 14 meters. The island, which was constructed between 1957 and 1958 to serve as a permanent platform for oil and gas production, is particularly suitable for ecological study. Habitat features associated with the armor rock and concrete tetrapods surrounding the island support a 'microecosystem' which differs in biotic composition from surrounding natural bottom areas. A major part of the study was devoted to analysis of seasonal dynamics in biotic composition. Permanent transects extending from the high intertidal to natural bottom were established normal to each of the four cardinal sides of the island. All macrobiota were censused in duplicate 1-square meter quadrats along each transect during each of the four seasons. Data analysis indicated that many species exhibit significant variability in abundance from one season to the next. In general, the findings indicate a rich and varied fauna and flora associated with the high-relief solid substrate of Rincon Island which differs substantially from the more depauperate natural bottom habitats in the area.
General note	Cover title.
General note	"September 1978."
Bibliography note	Bibliography: p. 64-65.
Access restriction	APPROVED FOR PUBLIC RELEASE
GPO item number	334-A-20 (microfiche)
Govt. docs number	D 103.42/8:78-3

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Joyner	Fed Docs Stacks	D 103.42/8:78-3	✔ Available	Place Hold

Ecological effects of an artificial island, Rincon Island, Punta Gorda, California / by G.F. Johnson and L.A. deWit ; prepared for U.S. Army Corps of Engineers, Coastal Engineering Research Center.

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