Early life stages of Calanus pacificus are neither exposed nor sensitive to low pH waters

McLaskey, Anna K; McElhany, Paul; Busch, D Shallin; Maher, Michael; Winans, Amanda K; Keister, Julie E

doi:10.1093/plankt/fbz059

i

Early life stages of Calanus pacificus are neither exposed nor sensitive to low pH waters

2019
By McLaskey, Anna K ; McElhany, Paul ; Busch, D Shallin ; ...

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Journal Title:

Journal of Plankton Research
Personal Author:

McLaskey, Anna K ; McElhany, Paul ; Busch, D Shallin ; Maher, Michael ; Winans, Amanda K ; Keister, Julie E
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; OAR (Oceanic and Atmospheric Research) ; NWFSC (Northwest Fisheries Science Center) ; OAP (Ocean Acidification Program)
Description:

We characterized the vertical distribution of Calanus pacificus eggs and larvae and the carbonate chemistry that they are exposed to in Puget Sound, WA. We found that, under stratified conditions, more than 90% of eggs and nauplii stages 1–4 were distributed above the pycnocline, in seawater with pH higher than 7.7. In addition, eggs and larvae from 101 females were reared for 5 days under a range of pH conditions (7.2–8.0) to investigate how pH sensitivity varies among individuals. We observed a slight increase in naupliar survival at pH 7.3 in Individual Brood experiments, while in Mixed Brood experiments, exposure to pH 7.3 led to a small decline in hatching success. In a Split Brood experiment, inter-individual variability among different females’ broods masked pH effects. These results indicate that C. pacificus early life stages are generally tolerant to short-term direct effects of ocean acidification.
Keywords:

Aquatic Science Ecology Ecology, Evolution, Behavior And Systematics Ecology, Evolution, Behavior And Systematics Ecology, Evolution, Behavior And Systematics
Source:

Journal of Plankton Research, 41(6), 893-896
DOI:

https://doi.org/10.1093/plankt/fbz059
ISSN:

0142-7873 ; 1464-3774
Format:

PDF
Publisher:

Oxford University Press (OUP)
Document Type:

Journal Article
Funding:

Grant no. NA10OAR4170057
Rights Information:

Other
Compliance:

Library
Main Document Checksum:

urn:sha256:b72e67bd7a29a7daf9032acfdd7753606f2ea0812d0b10f070c43aa5454faef5
Download URL:

https://repository.library.noaa.gov/view/noaa/59987/noaa_59987_DS1.pdf
File Type:

[PDF - 35.81 MB ]

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