Plankton carbon budget in a coastal wind-driven upwelling station off A Coruña (NW Iberian Peninsula)

Teira, Eva; Abalde, Julio; Alvarez-Ossorio, M. T.; Bode, Antonio; Carino, Carlos; Cid, Ángeles; Fernández, Emilio; González, Nieves López; Lorenzo, Jorge; Valencia, Joaquín; Varela, Manuel

doi:10.3354/meps265031

Cited by 30 publications

(29 citation statements)

References 49 publications

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“…As previously observed in the sampling sites (Teira et al 2001b(Teira et al , 2003a) the slopes of the log-log linear regressions (Model II) between volumetric DOCp and POCp were significantly less than 1 (Fig. 6E,F), which implies that PER tends to increase with decreased POCp.…”

Section: Differences In Planktonic Carbon Dynamicssupporting

confidence: 55%

“…In the present study, the DOC supply by phytoplankton was insufficient to support BCD (Table 2), contributing on averagẽ 30% of BCD at both sampling sites, suggesting a moderate coupling between phytoplankton and bacteria, according to the criteria used by Fouilland & Mostajir (2010). Similar or even lower values have been measured in oligo-to meso-trophic oceanic and coastal areas (Lignell 1990, Baines & Pace 1991, Morán et al 2002, Teira et al 2003a,b, Alonso-Sáez et al 2008, López-Sandoval et al 2011, although in most of these studies BR was estimated rather than measured, which may have significantly affected the corresponding BCD estimates. By contrast, higher values can be found in highly productive systems (Fouilland & Mostajir 2010, Morán et al 2013.…”

Section: Phytoplankton and Heterotrophic Bacteria Couplingmentioning

confidence: 58%

“…Differences in phytoplankton dynamics may drive changes in the carbon fluxes through the microbial communities along the seasonal cycle. Despite the seasonal variation in carbon flow through the microplanktonic communities that has been previously studied in shelf waters north of Cape Fisterra (Teira et al 2003a), a similar study has not been conducted so far in shelf waters off the Rías Baixas.…”

Section: Introductionmentioning

confidence: 96%

“…Although we do not have direct supporting data for this possibility during the sampling period, the significantly higher DOC concentration and FDOM-T values observed off A Coruña than off Vigo (Table 1) could be indicative of a higher influence of allochthonus DOM at that site. Several authors have observed that the DOCp/BCD ratio is higher during high compared to low productivity periods (Teira et al 2003a, Alonso-Sáez et al 2008) and suggested a lag-phase between DOC release and bacterial consumption. The fact that the present study included more samples belonging to the unproductive (downwelling) than to the productive (upwelling) period would explain in part the mean low DOCp/BCD ratios measured at the sampling locations.…”

Section: Phytoplankton and Heterotrophic Bacteria Couplingmentioning

confidence: 99%

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Local differences in phytoplankton-bacterioplankton coupling in the coastal upwelling off Galicia (NW Spain)

Teira

Hernando-Morales²,

Fernández³

et al. 2015

Mar. Ecol. Prog. Ser.

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We simultaneously studied microbial-mediated carbon fluxes at 2 contrasting sites within the coastal upwelling system off Galicia, near A Coruña and Vigo, Spain, over an annual cycle in order to compare the fraction of primary production released as dissolved organic carbon (DOC) and the degree of coupling between bacteria and phytoplankton. A significant fraction of primary production was released as DOC at both sites, averaging ~30%. DOC release ac counted for, on average, 30% of the total bacterial carbon demand, which is indicative of a moderate trophic dependence of bacteria on phytoplankton in these coastal ecosystems. Nevertheless, differences in hydrographic conditions associated with stronger upwelling pulses off Vigo, and deeper upper mixed layers during the downwelling period off A Coruña, led to significant differences in phytoplankton dynamics and the subsequent direct coupling with heterotrophic bacteria. Strong direct coupling between phytoplankton extracellular release and bacterial production (BP) was found off Vigo, which could be related to the quality of the DOC produced by actively growing phytoplankton. By contrast, DOC release and BP rates were decoupled off A Coruña, likely due to unaccounted DOC associated with indirect trophic processes or to the low availability of freshly produced exudates associated with overflow or photoinhibition mechanisms.

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Section: Differences In Planktonic Carbon Dynamicssupporting

confidence: 55%

Section: Phytoplankton and Heterotrophic Bacteria Couplingmentioning

confidence: 58%

Section: Introductionmentioning

confidence: 96%

Section: Phytoplankton and Heterotrophic Bacteria Couplingmentioning

confidence: 99%

See 2 more Smart Citations

Local differences in phytoplankton-bacterioplankton coupling in the coastal upwelling off Galicia (NW Spain)

Teira

Hernando-Morales²,

Fernández³

et al. 2015

Mar. Ecol. Prog. Ser.

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“…Protozooplankton are also an important link between bacterial production and mesozooplankton grazing . Upwelling areas are undoubtedly autotrophic, but it is still unclear whether the organic matter produced photosynthetically is channeled to higher trophic levels through the classical or microbial food webs (Teira et al 2003;Vargas and Gonzá lez 2004b). Legendre and Rassoulzadegan (1995) suggest that most productive situations involve a multivorous food web, where classical and microbial food webs both play significant roles.…”

mentioning

confidence: 99%

The relative importance of microbial and classical food webs in a highly productive coastal upwelling area

Vargas

Martínez

Cuevas

et al. 2007

Limnology & Oceanography

150

102

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We present an analysis of seasonal variations in the trophic pathways of carbon in a highly productive coastal upwelling region in the Humboldt current system off Chile. Seasonal changes in phytoplankton, protozooplankton, and bacteria biomass, along with rates of primary production (PP), bacterial growth, secondary production, vertical particle fluxes, and feeding by protozooplankton, omnivorous mesozooplankton, and carnivorous gelatinous zooplankton were determined from July 2004 to June 2005. Phytoplankton biomass and PP were maximal during spring/summer months, associated with upwelling episodes. Heterotrophic nanoflagellates (HNF) were the principal consumers of bacteria, removing .100% of their biomass daily. During autumn/winter, the protozooplankton grazed down a large fraction of HNF production (56% to 96% d 21 ). The mesozooplankton consumed 1-6% of the PP d 21 ; the different size fractions of copepods were omnivorous mostly during autumn/winter months, and ctenophores preyed most strongly on small copepods (0.5% to 5% d 21 ). A large part of the PP was channeled through the microbial food web, and only a small part AcknowledgmentsWe thank the captains and crew of the RV Kay Kay (Universidad de Concepció n, Chile) and the many undergraduate and graduate students who participated in our cruises (L. Lizá rraga, V. Aguilera, C. Aparicio, E. Menschel, and A. Araneda). We also thank José Luis Acuñ a and Albert Calbet for their valuable suggestions that substantially improved an earlier version of the manuscript and two anonymous reviewers for their critical and helpful comments.

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Environmental forcing on the interactions of plankton communities across a continental shelf in the Eastern Atlantic upwelling system

et al. 2013

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Plankton carbon budget in a coastal wind-driven upwelling station off A Coruña (NW Iberian Peninsula)

Cited by 30 publications

References 49 publications

Local differences in phytoplankton-bacterioplankton coupling in the coastal upwelling off Galicia (NW Spain)

Local differences in phytoplankton-bacterioplankton coupling in the coastal upwelling off Galicia (NW Spain)

The relative importance of microbial and classical food webs in a highly productive coastal upwelling area

Environmental forcing on the interactions of plankton communities across a continental shelf in the Eastern Atlantic upwelling system

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