Settlement patterns of red and purple sea urchins [Strongylocentrotus franciscanus and S. purpuratus) in California, USA

Ebert, TA; Sc, Schroeter; Dixon, John D.; Kalvass, Peter

doi:10.3354/meps111041

Cited by 104 publications

(108 citation statements)

References 21 publications

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“…Regional variability (10-100 km) in settlement and recruitment has been explained in the same terms, as due to regional variability in internal motions (Pineda, 1996) and in winddriven upwelling (Ebert and Russell, 1988;Ebert et al, 1994;Connolly and Roughgarden, 1998). Shanks and Wright (1987) also explained barnacle settlement variability at small scales, 50-300 m, as a result of variability in internal wave transport.…”

Section: Introductionmentioning

confidence: 77%

Temperature, stratification and barnacle larval settlement in two Californian sites

Pineda

López

2002

Continental Shelf Research

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Barnacle settlement was monitored in two sites 100 km apart along the coast of Alta and Baja California. In five periods of observations completed between 1991 and 1996, Chthamalus spp., Pollicipes polymerus, and Balanus glandula settlement was consistently higher in the northern site, La Jolla (LJ), than in the southern site, La Salina (LS). For Chthamalus, the most abundant settler, settlement was higher in LJ in 58 out of 60 paired dates, by a mean factor of 141. In 1996, time series of temperature in about 15 m of water showed that the stratification was 72% higher, on average, and that the thermocline was shallower in LJ than in LS. Spectra of temperature showed that internal motions of tidal and higher frequencies were more energetic and closer to the surface in LJ compared to LS. In LJ changes in settlement were positively correlated with changes in stratification. These results suggest that high-frequency internal motions are important in the onshore transport of larvae. Low-frequency cooling events recorded in LJ apparently caused the energetic semidiurnal temperature variability to migrate from the bottom towards the surface, leading to the surface manifestation of the internal tide and surface internal tidal bores, which indicates that the surface nearshore bores occur in response to the shallowing of the thermocline. Tidal and higher frequency internal motions were more energetic when the thermocline was shallow during the low-frequency cooling events, than when it was deep and relatively weak during ordinary conditions. The major cooling event in LJ correlated with the local wind, suggesting local wind-driven upwelling. On the other hand, correlation of LS temperature with LJ temperature, winds, and sea level suggest propagation from the South. These results suggest that the low-frequency drops in temperature that modulate the nearshore internal tidal bores are caused by a combination of the local wind and events that propagate poleward, possibly as coastally trapped waves. r

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Section: Introductionmentioning

confidence: 77%

Temperature, stratification and barnacle larval settlement in two Californian sites

Pineda

López

2002

Continental Shelf Research

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“…survivorship after settlement), rather than spatial differences in settlement (but see Pineda 1994b for a study with daily measurements). Studies of larval settlement and recruitment at larger scales (100s of meters to kilometers) have yielded mixed results (Ebert et al 1994, Jenkins et al 2000, Connolly et al 2001, O'Riordan et al 2004. Spatial coherence in settlement over larger scales has been interpreted in terms of mesoscale patterns of retention/advection associated with coastal upwelling (Ebert et al 1994), or spatially-consistent onshore winds across a large area (Bertness et al 1996, Jeffery & Underwood 2000.…”

Section: Discussionmentioning

confidence: 99%

Spatially heterogeneous, synchronous settlement of Chthamalus spp. larvae in northern Baja California

Ladah¹,

Tapia²,

Pineda³

et al. 2005

Mar. Ecol. Prog. Ser.

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We evaluated the spatial variability in barnacle settlement at scales of 10s to 100s of meters (among-sites: 300 m; within-site: 30 m) along 1 km of coastline in the Bay of Todos Santos, northern Baja California, Mexico. Settlement of the intertidal barnacles Chthamalus spp. was monitored daily from April 1 to May 10, 2002, and thereafter every other day to September 18, 2002. Concurrently, temperature of the water column was measured every 15 min, and hourly wind speed and direction data were acquired from a nearby site. We identified 12 settlement pulses during our study, with all but 2 pulses showing significant differences in mean settlement at either or both spatial scales. Despite a high variability in numbers, settlement pulses were synchronous between sites. The occurrence of settlement pulses was significantly correlated with a rapid increase in the stratification of nearshore waters, but not correlated with sudden fluctuations in the direction of winds perpendicular to the shore. Sudden changes in the stratification of nearshore waters have been associated with the occurrence of internal tidal bores. Our results suggest that internal motions, more specifically internal tidal bores, could be an important mechanism for the onshore transport of larvae in the Bay of Todos Santos. KEY WORDS: Synchronous settlement · Spatial variability · Intertidal barnacle · Chthamalus · Baja CaliforniaResale or republication not permitted without written consent of the publisher

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“…Therefore, it is expected that El Niño would cause major and clearly detectable changes in patterns of recruitment of benthic and pelagic invertebrates and fish. Indeed, several studies have attributed increased or decreased recruitment of different species to El Niño (Paine 1986;Ebert et al 1994;Moreno et al 1998;Davis 2000). However, the strength of the evidence for El Niño effects on recruitment is limited by the temporal and spatial scope of the studies; most studies are short in duration and limited to one or a few sites.…”

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confidence: 99%

Recruitment of intertidal invertebrates in the southeast Pacific: Interannual variability and the 1997–1998 El Niño

Navarrete

Broitman

Wieters

et al. 2002

Limnology & Oceanography

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We evaluated interannual variability and the effect of the 1997-1998 El Niño event on recruitment of intertidal mussels and barnacles along the coast of central Chile in the southeast Pacific. Monthly monitoring of recruitment at 11 sites spread over 900 km (29-34ЊS) during the 1997-1998 El Niño and over the same months in 1998-1999 and 1999-2000 allowed us to assess geographic patterns in interannual recruitment variation. The geographically most consistent interannual trend was observed for the mussel Perumytilus purpuratus, which showed overall lower recruitment rates during the 1997-1998 El Niño year. However, the magnitude of the effect at any given site was small. Interannual variation in recruitment rates of the other two intertidal mussel species, as well as two chthamaloid barnacles, were not consistent across the region, and overall, few sites exhibited significant differences among years. Differences between two and three orders of magnitude in mean annual recruitment of mussels and barnacles were observed among sites, yet the relative ranking of sites was fairly similar among years for most species. Contrary to the large positive effect that the 1997-1998 El Niño had on barnacle recruitment along the coast of central and northern California, our results show that recruitment of dominant intertidal barnacles along central Chile were not significantly altered by this strong oceanographic event. Lack of consistent trends among sites emphasizes the need to study several sites when looking at large-scale oceanographic anomalies and shows that El Niño effects on interannual recruitment variation are not predictable.

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Settlement patterns of red and purple sea urchins [Strongylocentrotus franciscanus and S. purpuratus) in California, USA

Cited by 104 publications

References 21 publications

Temperature, stratification and barnacle larval settlement in two Californian sites

Temperature, stratification and barnacle larval settlement in two Californian sites

Spatially heterogeneous, synchronous settlement of Chthamalus spp. larvae in northern Baja California

Recruitment of intertidal invertebrates in the southeast Pacific: Interannual variability and the 1997–1998 El Niño

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