 |
| Titel |
Disentangling the effects of El Niño on a population of the polychaete Sigambra bassi in the Bay of Ancón, Peru |
| VerfasserIn |
T. S. Peña, K. Johst, V. Grimm, W. E. Arntz, J. Tarazona |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7340
|
| Digitales Dokument |
URL |
| Erschienen |
In: 1st Alexander von Humboldt International Conference ; Nr. 6 (2006-01-31), S.161-166 |
| Datensatznummer |
250003253
|
| Publikation (Nr.) |
 copernicus.org/adgeo-6-161-2006.pdf |
|
|
|
|
|
| Zusammenfassung |
| The macrobenthic community in shallow soft-bottom areas in the Bay of
Ancón, Peru, is characterized by low biodiversity due to low oxygen
concentrations. During El Niño (EN) events, higher water temperature and
higher concentrations of dissolved oxygen induce a temporary increase in
biodiversity. However, the structure and dynamics of the emerging
macrobenthic community and populations, especially the polychaete Sigambra bassi, vary
strongly among events. The reasons for this variation are poorly understood,
in particular the relative influence of abiotic versus biotic factors. To
disentangle how abiotic and biotic factors influence the different responses
of the population of S. bassi, population models were developed based on detailed
long-term monitoring data, which include four El Niño events. The
results show that S. bassi abundances are favored by abiotic environmental
conditions during EN, namely high temperature and dissolved oxygen
concentration, but these abiotic effects are modulated by different biotic
processes. In two EN events with relatively similarly high temperature
anomalies (EN 1982-1983 and 1997-1998) different biological interactions
(competition, predation, facilitation) and different species composition of
the community resulted in different responses of the population of S. bassi. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|