Natural intrusions of hypoxic, low pH water into nearshore marine environments on the California coast

Booth, J. Ashley T.; McPhee-Shaw, Erika E.; Chua, Paul Lester; Kingsley, Eric; Denny, Mark W.; Phillips, Roger; Bograd, Steven J.; Zeidberg, Louis D.; Gilly, William F.

doi:10.1016/j.csr.2012.06.009

Cited by 108 publications

(101 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We investigated how fluctuating exposure to low-pH and low-oxygen waters affects the mortality and growth of juvenile abalone using a pulse exposure experiment mimicking upwelling conditions. Booth et al (2012) reported that the mean duration of upwelling nearshore water (17 m in depth) with pH 7.6 and DO 4.6 mg L −1 off Monterey CA is 2.4 h, with a maximum duration of 40 h. Moreover, pH can drop dramatically by ca. 0.4 units within an hour.…”

Section: Introductionmentioning

confidence: 99%

The effects of intermittent exposure to low-pH and low-oxygen conditions on survival and growth of juvenile red abalone

2013

View full text Add to dashboard Cite

Abstract. Exposure of nearshore animals to hypoxic, lowpH waters upwelled from below the continental shelf and advected near the coast may be stressful to marine organisms and lead to impaired physiological performance. We mimicked upwelling conditions in the laboratory and tested the effect of fluctuating exposure to water with low-pH and/or low-oxygen levels on the mortality and growth of juvenile red abalone (Haliotis rufescens, shell length 5-10 mm). Mortality rates of juvenile abalone exposed to low-pH (7.5, total scale) and low-O 2 (40 % saturation, mg L −1 ) conditions for periods of 3 to 6 h every 3-5 days over 2 weeks did not differ from those exposed to control conditions (O 2 : 100 % saturation, 12 mg L −1 ; pH 8.0). However, when exposure was extended to 24 h, twice over a 15-day period, juveniles experienced 5-20 % higher mortality in the low-oxygen treatments compared to control conditions. Growth rates were reduced significantly when juveniles were exposed to lowoxygen and low-pH treatments. Furthermore, individual variation of growth rate increased when juveniles were exposed simultaneously to low-pH and low-O 2 conditions. These results indicate that prolonged exposure to low-oxygen levels is detrimental for the survival of red abalone, whereas pH is a crucial factor for their growth. However, the high individual variation in growth rate under low levels of both pH and oxygen suggests that cryptic phenotypic plasticity may promote resistance to prolonged upwelling conditions by a portion of the population.

show abstract

Section: Introductionmentioning

confidence: 99%

The effects of intermittent exposure to low-pH and low-oxygen conditions on survival and growth of juvenile red abalone

2013

View full text Add to dashboard Cite

show abstract

“…Considerable environmental variation in upwelling ecosystems regularly exposes coastal fishery species to varying levels of pH, and [O 2 ] through space and time [1][2][3][4][5][6][7]. Environmental fluctuations in seawater properties, including low levels of pH and [O 2 ], can cause sublethal and lethal effects in loliginids (nearshore squid; [8]).…”

Section: Introductionmentioning

confidence: 99%

Environmental pH, O2 and Capsular Effects on the Geochemical Composition of Statoliths of Embryonic Squid Doryteuthis opalescens

Navarro

Bockmon

Frieder

et al. 2014

Water

View full text Add to dashboard Cite

show abstract

“…Similarly, McClatchie et al (2010) reported decreases in DO content of , 24% and shoaling of the hypoxic zone of , 65 m over the same period. Observed DO declines are not limited to deeper water, as oxygen-depleted offshore waters episodically intrude on the coast through seasonal upwelling, tides, and coastally trapped waves Booth et al 2012;Crawford and Peñ a 2013).…”

mentioning

confidence: 99%

Patterns and potential drivers of declining oxygen content along the southern California coast

Booth¹,

Woodson

Sutula

et al. 2014

Limnology & Oceanography

View full text Add to dashboard Cite

Here we examine a 50+ yr data set from a regionally coordinated southern California water quality monitoring program to assess temporal trends and determine whether nearshore waters are exhibiting changes in dissolved oxygen (DO) content similar to those reported offshore. DO in sub-mixed layer nearshore waters (, 10 km from shore) have declined up to four times faster than reported for offshore waters over the last 15 yr. These trends were evident over depth, and along isopycnals. They have no precedent over the past 50 yr and do not appear to be attributable primarily to large-scale climate variability in ocean DO. Coastal biophysical processes, including increased phytoplankton biomass in surface waters, are likely contributing to the recent elevated rate of DO decline in nearshore waters, as evidenced by higher rates of increase in apparent oxygen utilization. It is unclear whether these processes result from upwelling-derived or anthropogenic nutrient inputs.

show abstract

Natural intrusions of hypoxic, low pH water into nearshore marine environments on the California coast

Cited by 108 publications

References 32 publications

The effects of intermittent exposure to low-pH and low-oxygen conditions on survival and growth of juvenile red abalone

The effects of intermittent exposure to low-pH and low-oxygen conditions on survival and growth of juvenile red abalone

Environmental pH, O2 and Capsular Effects on the Geochemical Composition of Statoliths of Embryonic Squid Doryteuthis opalescens

Patterns and potential drivers of declining oxygen content along the southern California coast

Contact Info

Product

Resources

About