| Main Title |
Effects of El Nino and La Nina on Seabird Assemblages in the Equatorial Pacific. |
| Author |
Ribic, C. A. ;
Ainley, D. G. ;
Spear, L. B. ;
|
| CORP Author |
Corvallis Environmental Research Lab., OR. ;Point Reyes Bird Observatory, Stinson Beach, CA. ;Washington Univ., Seattle. Center for Quantitative Science in Forestry, Fisheries, and Wildlife.;National Science Foundation, Washington, DC.;National Geographic Society, Washington, DC. |
| Publisher |
c1992 |
| Year Published |
1992 |
| Report Number |
EPA/600/J-92/290; NSF-OCE-8515637 ;NSF-OCE-8911125; |
| Stock Number |
PB92-217405 |
| Additional Subjects |
Ocean currents ;
Waterfowl ;
Equatorial Pacific Ocean ;
Biological surveys ;
Aquatic ecosystems ;
Species diversity ;
Climatic changes ;
Birds ;
Seasons ;
Statistical data ;
Marine biology ;
Abundance ;
El Nino ;
La Nina
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB92-217405 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
18p |
| Abstract |
Spring and autumn cruises in Equatorial and Subtropical Surface waters were conducted 1984-1989 in the eastern equatorial Pacific. Three genera predominated, but the relative contribution of each to species assemblages differed markedly depending on season and water mass. During autumn, on the basis of biomass, Pterodroma dominated assemblages in both water masses; on the basis of abundance, Pterodroma shared dominance with Oceanodroma but only in Equatorial Surface Water. During spring, in either water mass, no one genus could be considered dominant. Assemblage composition varied from year to year, but changed the most during El Nino 1986-87 and La Nina 1988. The impact of either event was manifested by a decrease or disappearance of genera and species that were normally of medium-abundance. Generally, the common genera and species were not affected. For El Nino, assemblages changed more during autumn compared to spring. The effect of La Nina was strongest during spring. |
| Supplementary Notes |
Also pub. as Point Reyes Bird Observatory, Stinson Beach, CA. rept. no. CONTRIB-499. Pub. in Marine Ecology Progress Series, v80 p109-124 Mar 92. Prepared in cooperation with Point Reyes Bird Observatory, Stinson Beach, CA., and Washington Univ., Seattle. Center for Quantitative Science in Forestry, Fisheries, and Wildlife. Sponsored by National Science Foundation, Washington, DC., and National G |
| NTIS Title Notes |
Journal article. |
| Category Codes |
47D; 57H |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/02 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
226928019 |
| Origin |
NTIS |
| Type |
CAT |
