IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Warm oceanographic anomalies and fishing pressure drive seabird nesting north
Velarde, E.; Ezcurra, E.; Horn, M.H.; Patton, R.T. (2015). Warm oceanographic anomalies and fishing pressure drive seabird nesting north. Science Advances 1(5): e1400210. hdl.handle.net/10.1126/sciadv.1400210
In: Science Advances. AAAS: New York. ISSN 2375-2548, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine

Authors  Top 
  • Velarde, E.
  • Ezcurra, E.
  • Horn, M.H.
  • Patton, R.T.

Abstract
    Parallel studies of nesting colonies in Mexico and the United States show that Elegant Terns (Thalasseus elegans) have expanded from the Gulf of California Midriff Island Region into Southern California, but the expansion fluctuates from year to year. A strong inverse relationship between nesting pairs in three Southern California nesting areas [San Diego saltworks, Bolsa Chica Ecological Reserve, and Los Angeles Harbor (1991 to 2014)] and Isla Rasa in the Midriff (1980 to 2014) shows that terns migrate northward when confronting warm oceanographic anomalies (>1.0°C), which may decrease fish availability and hamper nesting success. Migration pulses are triggered by sea surface temperature anomalies localized in the Midriff and, secondarily, by reductions in the sardine population as a result of intensive fishing. This behavior is new; before year 2000, the terns stayed in the Midriff even when oceanographic conditions were adverse. Our results show that terns are responding dynamically to rapidly changing oceanographic conditions and fish availability by migrating 600 km northwest in search of more productive waters.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors