Differential response of distinct copepod life history types to spring environmental forcing in Rivers Inlet, British Columbia, Canada

PeerJ

article

Desiree Tommasi¹  Brian P.V. Hunt²  Evgeny A. Pakhomov² 

[1] Institute of Marine Sciences, University of California Santa Cruz;Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia;Institute for the Oceans and Fisheries, University of British Columbia;Hakai Institute

关键词: Copepod;    Life history;    Functional traits;    Phenology;    Demography;    Fjord;   

DOI  :  10.7717/peerj.12238

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

The temporal dynamics of five copepod species common to coastal waters of the Pacific Northwest were examined in relation to variability in spring temperature and phytoplankton dynamics in 2008, 2009, and 2010 in Rivers Inlet, British Columbia, Canada. The five species were differentiated by life history strategies. Acartia longiremis, Metridia pacifica, and Paraeuchaeta elongata remained active over most of the year. By contrast, the reproductive effort of Eucalanus bungii and Calanus marshallae was concentrated over the spring period and they spent most of the year in diapause as C5 copepodites. A delay in the timing of the spring bloom was associated with a shift in the phenology of all species. However, following the delay in spring bloom timing, recruitment to the G1 cohort was reduced only for E. bungii and C. marshallae. Recruitment successes of E. bungii and C. marshallae was also drastically reduced in 2010, an El Niño year, when spring temperatures were highest. Reasons for the observed differential response to spring environmental forcing, and its effect on upper trophic levels, are discussed.

【 授权许可】

CC BY