Temporal and spatial variability in Pseudo-nitzschia spp. in Alabama coastal waters: A “hot spot” linked to submarine groundwater discharge?

Liefer, Justin D.; MacIntyre, Hugh L.; Novoveská, Lucie; Smith, William L.; Dorsey, Carol P.

doi:10.1016/j.hal.2009.02.003

Cited by 67 publications

(44 citation statements)

References 39 publications

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“…delicatissima and P. cf. pungens) are generally reported to occur at low temperatures in early spring (<18°C) (Türkoğlu & Koray, 2002;Lundholm et al, 2005;Liefer et al, 2009). In the present study, Pseudo-nitzschia species were observed to be more abundant in the lower and middle estuary in January and May, but they were also observed in June and August.…”

Section: Discussionsupporting

confidence: 55%

Potentially harmful microalgae and algal blooms in a eutrophic estuary in Turkey

Taş

Yılmaz

2015

Medit. Mar. Sci.

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Distribution of potentially harmful microalgae and algal blooms were investigated at monthly and weekly time scales between October 2009 and September 2010 in the Golden Horn, a eutrophic estuary in the Sea of Marmara (Turkey). Several physical and chemical parameters were analysed together with phytoplankton composition and abundance. A total number of 23 potentially harmful and/or bloom-forming microalgae (14 dinoflagellates, 4 diatoms and 5 phytoflagellates) were identified throughout this study period, of which nine taxa have been confirmed to be toxic elsewhere in the world. Most harmful species and algal blooms were observed in late spring and summer particularly in the middle and upper estuaries, and nine taxa formed dense and successive algal blooms causing water discoloration. Nutrient concentrations increased significantly from the lower to the upper estuary. Additionally, high organic matter loads in the upper estuary could also have benefited by mixotrophic species. The increasing number of potentially harmful and bloom-forming species and algal blooms indicated that the GHE is a potential risk area for future HABs.

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Section: Discussionsupporting

confidence: 55%

Potentially harmful microalgae and algal blooms in a eutrophic estuary in Turkey

Taş

Yılmaz

2015

Medit. Mar. Sci.

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“…Low levels of DA have been detected in menhaden (Table 1) and seawater samples off the Louisiana coast (Del Rio et al, 2010), where P. pseudodelicatissima, P. pungens, P. americana and P. calliantha are the dominant Pseudo-nitzschia species. High Pseudo-nitzschia abundance (>10 6 cells l À1 ) has been associated with submarine ground discharge of nutrients off the coast of nearby Alabama (Liefer et al, 2009;MacIntyre et al, 2011). Toxic Pseudo-nitzschia spp.…”

Section: Homo Sapiensmentioning

confidence: 99%

Pseudo-nitzschia physiological ecology, phylogeny, toxicity, monitoring and impacts on ecosystem health

et al. 2012

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“…A growing body of evidence suggests that there is a relationship between SGD and algal blooms in coastal regions. Indirect measurements, for example, have shown that SGD affects coastal biological communities through different path ways: varying nutrient cycling in the coastal zone, changing the character of nutrient limitation by altering stoichiometric relationships, increasing primary production and altering phytoplankton community composition (Gobler & Sanudo-Wilhelmy 2001, Hu et al 2006, Lee & Kim 2007, Liefer et al 2009, Lee et al 2010. However, obtaining direct evidence of the effects of SGD in coastal communities has been more challenging.…”

Section: Introductionmentioning

confidence: 99%

Changes in microbial communities in response to submarine groundwater input

Garcés

Basterretxea²,

Tovar-Sánchez³

2011

Mar. Ecol. Prog. Ser.

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The effects of submarine groundwater on the native plankton populations of a coastal area were examined through a series of in situ groundwater addition experiments carried out during the summer in a Mediterranean embayment. Different percentages (4, 8, 10 and 12%) of groundwater extracted from 2 intertidal coastal localities subjected to different land uses were added to picoplankton-dominated natural populations. The responses of the phytoplankton and bacterioplankton biomass were analyzed. The biomass of the phytoplankton community increased by as much as 96% above the mean initial value in ammonium-enriched groundwater and by a maximum of 400% in groundwater enriched in nitrate. Groundwater additions were followed by an enhancement in the biomass of all major autotrophic groups, with the most notable response in picophytoplankton, whereas bacterioplankton abundance increased only slightly. The abundance of diatoms was initially low although their growth rates increased faster than those of dinoflagellates, thus shifting the community composition towards a higher relative microphytoplankton proportion. An initial dinoflagellate community dominated by small naked dinoflagellates shifted to one characterized by a high abundance of Prorocentrum minimum. Our results demonstrate that, even in areas with low anthropogenic activity, groundwater discharges to the coast can effectively stimulate autotrophic plankton growth, thereby producing shifts in the microbial food-web structure of coastal waters. This, in turn, increases the possibility of outbreaks of opportunistic species, which can eventually result in harmful algal bloom episodes.

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Temporal and spatial variability in Pseudo-nitzschia spp. in Alabama coastal waters: A “hot spot” linked to submarine groundwater discharge?

Cited by 67 publications

References 39 publications

Potentially harmful microalgae and algal blooms in a eutrophic estuary in Turkey

Potentially harmful microalgae and algal blooms in a eutrophic estuary in Turkey

Pseudo-nitzschia physiological ecology, phylogeny, toxicity, monitoring and impacts on ecosystem health

Changes in microbial communities in response to submarine groundwater input

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