Contribution of Groundwater Discharge to the Coastal Dissolved Nutrients and Trace Metal Concentrations in Majorca Island: Karstic vs Detrital Systems

Tovar-Sánchez, Antonio; Basterretxea, Gotzon; Rodellas, Valentí; Sánchez-Quiles, David; García-Orellana, Jordi; Masqué, Pere; Jordi, Antoni; López, José María Botana; García-Solsona, Ester

doi:10.1021/es502958t

Cited by 66 publications

(39 citation statements)

References 36 publications

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“…A measured offshore value of 1.7 Bq 228 Th m −3 (n = 4) was subtracted from all surface water samples to determine excess 224 Ra. Because nearshore residence times were anticipated to be short, we used the activity ratios of 224 Ra and 223 Ra in surface-water and pore-water to calculate the surface-waters apparent radium water age (Moore, 2000;Tovar-Sanchez et al, 2014) as:…”

Section: Calculating Sgd Apparent Water Ages and Residence Timesmentioning

confidence: 99%

Identification and quantification of diffuse fresh submarine groundwater discharge via airborne thermal infrared remote sensing

Tamborski

Rogers

Bokuniewicz

et al. 2015

Remote Sensing of Environment

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Section: Calculating Sgd Apparent Water Ages and Residence Timesmentioning

confidence: 99%

Identification and quantification of diffuse fresh submarine groundwater discharge via airborne thermal infrared remote sensing

Tamborski

Rogers

Bokuniewicz

et al. 2015

Remote Sensing of Environment

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“…In the Mediterranean Sea, which is an oligotrophic basin characterized by limited surface water inputs, groundwater discharge is a major source of nutrients to coastal systems and may thus affect the primary production in the ecosystems (Herrera-Silveira, 1998;Basterretxea et al, 2010;Tovar-Sánchez et al, 2014;Rodellas et al, 2015). However, the impacts of groundwater discharge are not limited to nutrient loading: a wide range of organisms also respond to changes in water salinity, light penetration into water column, pH and turbulence (Short and Burdick, 1996;Troccoli-Ghinaglia et al, 2010;Lee et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Growth Rates of the Mediterranean Mussel in a Coastal Lagoon Driven by Groundwater Inflow

et al. 2019

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Groundwater discharge is today recognized as an important pathway for freshwater, nutrients and other dissolved chemical substances to coastal systems. While its effect on supporting primary production in coastal ecosystems is increasingly recognized, its impact on growth of animals at higher trophic level (primary and secondary consumers) is less well documented. Here, we investigate the impact of groundwater discharge on the growth of the Mediterranean mussel (Mytilus galloprovincialis) in a coastal lagoon. Growth rates and condition index (tissue weight/shell weight) of mussels growing at groundwater-exposed sites and at a control site in Salses-Leucate lagoon (France) were measured. The mussels in this lagoon produce circadian (daily rhythm) growth increments in their shell, as opposed to semi-diurnal increments in tidally influenced systems. Mussels from groundwater-influenced sites have higher growth rate and condition index compared to those from a control site. Importantly, growth rates from groundwater-influenced sites are amongst the highest rates reported for the Mediterranean region (41 ± 9 µm d −1 ). The higher growth rates at groundwaterinfluenced sites are likely a consequence of both the higher winter temperatures of lagoon water as a result of groundwater discharging with relatively constant temperatures, and the groundwater-driven nutrient supply that increase the food availability to support mussel growth. Overall, this study demonstrates that groundwater discharge to Mediterranean lagoons provides favorable environmental conditions for fast growth of mussels of high commercial-quality.

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“…In the Balearic Islands, available nitrogen concentrations are frequently higher than those of other elements, as result of human activities, and the low concentrations of P i limit coastal productivity (Basterretxea et al, 2007(Basterretxea et al, , 2010Tovar-Sánchez et al, 2014). Consequently, the use of alternative P sources becomes a fundamental factor for understanding phytoplankton growth and community composition along the Mediterranean coasts.…”

Section: Introductionmentioning

confidence: 99%

Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary

et al. 2015

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We investigated the species-specific phosphorus (P) nutritional strategies in the microphytoplankton community in the Mahon estuary (Minorca, Western Mediterranean) in 2011, under two contrasting hydrographic scenarios. Estuarine flow, nutrient concentrations, phytoplankton community composition, and enzyme-labeled fluorescence (ELF) were measured in June and October, corresponding to the beginning and the end of summer. Dissolved inorganic nitrogen (DIN) and inorganic phosphate (P i ) exhibited enhanced concentrations in the inner estuary where N:P molar ratios suggested P-limitation in both surveys. P i was low and variable (0.09 ± 0.02 µmol L −1 in June and 0.06 ± 0.02 µmol L −1 in October), whereas organic phosphorus remained a more readily available P source. Even though ambient P i concentrations were slightly higher on June, when the microphytoplankton assemblage was dominated by dinoflagellates, the percentage of ELF labeled cells was notably higher (65 ± 9% of total cells) than in October (12 ± 10%), when the presence of diatoms characterized the microphytoplankton community. Alkaline phosphatase activity (AP) was mainly expressed by dinoflagellate taxa, whereas diatoms only displayed significant AP in the inner estuary during the June survey. A P-addition bioassay in which response of AP to P i enrichment was evaluated showed marked reduction in AP with increasing P i . However, some dinoflagellate species maintained AP even when P i was supplied in excess. We suggest that in the case of some dinoflagellate species AP is not as tightly controlled by ambient P i as previously believed. AP activity in these species could indicate selective use of organic phosphorus, or slow metabolic response to changes in P forms, rather than physiological stress to low P i availability. We emphasize the importance of identifying the species-specific phosphorus requirements and their capability for P assimilation in order to understand the contribution of microphytoplankton to the whole community response to biogeochemical perturbations.

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Contribution of Groundwater Discharge to the Coastal Dissolved Nutrients and Trace Metal Concentrations in Majorca Island: Karstic vs Detrital Systems

Abstract: Submarine groundwater discharge (SGD) derived nutrient (NO 2-, NO 3-, NH 4 + , PO 4 3-, and

Cited by 66 publications

References 36 publications

Identification and quantification of diffuse fresh submarine groundwater discharge via airborne thermal infrared remote sensing

Identification and quantification of diffuse fresh submarine groundwater discharge via airborne thermal infrared remote sensing

Enhanced Growth Rates of the Mediterranean Mussel in a Coastal Lagoon Driven by Groundwater Inflow

Species-specific variation in the phosphorus nutritional sources by microphytoplankton in a Mediterranean estuary

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