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Antonio Mazzola - One of the best experts on this subject based on the ideXlab platform.
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The Effect of Temporal Changes and Environmental Trophic Condition on the Isotopic Composition (omega13C and omega15N) of Atherina boyeri (Risso, 1810) and Gobius niger (L., 1758) in a Mediterranean Coastal Lagoon (Lake of Sabaudia): Implications for
Marine Ecology, 2020Co-Authors: Gianluca Sara, Salvatrice Vizzini, Antonio MazzolaAbstract:δ13C and δ15N of organic matter sources and consumers were employed to analyse Trophic differentiation between a benthic consumer, Gobius niger (L., 1758) (Pisces, Osteichthyes), and a pelagic consumer, Atherina boyeri (Risso, 1810) (Pisces, Osteichthyes) in a Mediterranean coastal lagoon (Lake of Sabaudia) in winter and summer 1999. Trophic differences between the two species throughout the two sampling periods were related to the environmental Trophic Condition (i. e. nutrient and phytopigment concentrations). Although these two fish have different habitats, they both exploited benthic organisms, above all in summer. When the nutrient and phytopigment concentrations were higher (summer), the most abundant benthic organisms were the main food sources for both species. In winter A. boyeri apparently shifted its feeding preferences to include zooplankton, confirming its opportunistic feeding strategy. Particulate organic matter and algae seemed to play the main Trophic role in the food web structure. Benthic invertebrates used both sources, while zooplankton seemed to rely exclusively on the particulate fraction. The overlapping and very depleted signatures of sedimentary and particulate organic matter highlights a strong link between sediments and water column, rarely observed in other aquatic ecosystems using stable isotopes. Such a finding further substantiates the importance of particulate organic matter as a food source in the study area. © 2002 Blackwell Verlag, Berlin
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the effect of temporal changes and environmental Trophic Condition on the isotopic composition omega13c and omega15n of atherina boyeri risso 1810 and gobius niger l 1758 in a mediterranean coastal lagoon lake of sabaudia implications for food web st
Marine Ecology, 2002Co-Authors: Gianluca Sara, Salvatrice Vizzini, Antonio MazzolaAbstract:. ω13C and ω15N of organic matter sources and consumers were employed to analyse Trophic differentiation between a benthic consumer, Gobius niger (L., 1758) (Pisces, Osteichthyes), and a pelagic consumer, Atherina boyeri (Risso, 1810) (Pisces, Osteichthyes) in a Mediterranean coastal lagoon (Lake of Sabaudia) in winter and summer 1999. Trophic differences between the two species throughout the two sampling periods were related to the environmental Trophic Condition (i. e. nutrient and phytopigment concentrations). Although these two fish have different habitats, they both exploited benthic organisms, above all in summer. When the nutrient and phytopigment concentrations were higher (summer), the most abundant benthic organisms were the main food sources for both species. In winter A. boyeri apparently shifted its feeding preferences to include zooplankton, confirming its opportunistic feeding strategy. Par-ticulate organic matter and algae seemed to play the main Trophic role in the food web structure. Benthic invertebrates used both sources, while zooplankton seemed to rely exclusively on the particulate fraction. The overlapping and very depleted signatures of sedimentary and particulate organic matter highlights a strong link between sediments and water column, rarely observed in other aquatic ecosystems using stable isotopes. Such a finding further substantiates the importance of particulate organic matter as a food source in the study area.
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The Effect of Temporal Changes and Environmental Trophic Condition on the Isotopic Composition (ω13C and ω15N) of Atherina boyeri (Risso, 1810) and Gobius niger (L., 1758) in a Mediterranean Coastal Lagoon (Lake of Sabaudia): Implications for Food We
Marine Ecology, 2002Co-Authors: Gianluca Sara, Salvatrice Vizzini, Antonio MazzolaAbstract:. ω13C and ω15N of organic matter sources and consumers were employed to analyse Trophic differentiation between a benthic consumer, Gobius niger (L., 1758) (Pisces, Osteichthyes), and a pelagic consumer, Atherina boyeri (Risso, 1810) (Pisces, Osteichthyes) in a Mediterranean coastal lagoon (Lake of Sabaudia) in winter and summer 1999. Trophic differences between the two species throughout the two sampling periods were related to the environmental Trophic Condition (i. e. nutrient and phytopigment concentrations). Although these two fish have different habitats, they both exploited benthic organisms, above all in summer. When the nutrient and phytopigment concentrations were higher (summer), the most abundant benthic organisms were the main food sources for both species. In winter A. boyeri apparently shifted its feeding preferences to include zooplankton, confirming its opportunistic feeding strategy. Par-ticulate organic matter and algae seemed to play the main Trophic role in the food web structure. Benthic invertebrates used both sources, while zooplankton seemed to rely exclusively on the particulate fraction. The overlapping and very depleted signatures of sedimentary and particulate organic matter highlights a strong link between sediments and water column, rarely observed in other aquatic ecosystems using stable isotopes. Such a finding further substantiates the importance of particulate organic matter as a food source in the study area.
João Carlos Marques - One of the best experts on this subject based on the ideXlab platform.
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Applying quality status criteria to a temperate estuary before and after the mitigation measures to reduce euTrophication symptoms
Estuarine Coastal and Shelf Science, 2020Co-Authors: Ana I. Lillebø, Heliana Teixeira, Miguel A. Pardal, João Carlos MarquesAbstract:The Mondego estuary is a well-described polyhaline type of transitional water located at the North Atlantic Ocean Ecoregion, where cultural euTrophication progressed over the last decades of the 20th century. Consequently, and due to huge productivity of Ulva spp. Zostera noltii meadows were severely reduced causing the whole ecosystem to become impoverished in terms of macrofaunal abundance, biomass and species richness with a concomitant lowering of secondary production. In 1998, experimental mitigation measures were implemented, via changes in hydrology to increase circulation and diversion of nutrient rich freshwater inflow, to reverse the process in the most affected area of the estuary – its south arm. Thus, the system quality status was assessed before and after 1998, over a ten year period. The OSPAR comprehensive procedure, the first phase of the US-NEEA procedure and the proposed EU-WFD physicochemical status criteria were applied to the data before and after the modifications and all show that the system health has improved. Nonetheless, the annual means of the oxidised forms of nitrogen and of phosphate were not reduced. In fact, applying criteria used in classifying the nutrient levels in transitional waters and the Baltic sea Trophic Condition, the system has not improved. Meaning that, to look forward to a “higher” quality status, future measures should also consider longer term solutions such as improved agriculture practices in the Mondego River valley through environmental friendly technological solutions that will reduce the nutrient loads to this systemhttp://dx.doi.org/10.1016/j.ecss.2006.10.01
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Applying quality status criteria to a temperate estuary before and after the mitigation measures to reduce euTrophication symptoms
Estuarine Coastal and Shelf Science, 2007Co-Authors: Ana I. Lillebø, Heliana Teixeira, Miguel A. Pardal, João Carlos MarquesAbstract:The Mondego estuary is a well-described polyhaline type of transitional water located at the North Atlantic Ocean Ecoregion, where cultural euTrophication progressed over the last decades of the 20th century. Consequently, and due to huge productivity of Ulva spp. Zostera noltii meadows were severely reduced causing the whole ecosystem to become impoverished in terms of macrofaunal abundance, biomass and species richness with a concomitant lowering of secondary production. In 1998, experimental mitigation measures were implemented, via changes in hydrology to increase circulation and diversion of nutrient rich freshwater inflow, to reverse the process in the most affected area of the estuary – its south arm. Thus, the system quality status was assessed before and after 1998, over a ten year period. The OSPAR comprehensive procedure, the first phase of the US-NEEA procedure and the proposed EU-WFD physicochemical status criteria were applied to the data before and after the modifications and all show that the system health has improved. Nonetheless, the annual means of the oxidised forms of nitrogen and of phosphate were not reduced. In fact, applying criteria used in classifying the nutrient levels in transitional waters and the Baltic sea Trophic Condition, the system has not improved. Meaning that, to look forward to a “higher” quality status, future measures should also consider longer term solutions such as improved agriculture practices in the Mondego River valley through environmental friendly technological solutions that will reduce the nutrient loads to this system.
Gianluca Sara - One of the best experts on this subject based on the ideXlab platform.
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The Effect of Temporal Changes and Environmental Trophic Condition on the Isotopic Composition (omega13C and omega15N) of Atherina boyeri (Risso, 1810) and Gobius niger (L., 1758) in a Mediterranean Coastal Lagoon (Lake of Sabaudia): Implications for
Marine Ecology, 2020Co-Authors: Gianluca Sara, Salvatrice Vizzini, Antonio MazzolaAbstract:δ13C and δ15N of organic matter sources and consumers were employed to analyse Trophic differentiation between a benthic consumer, Gobius niger (L., 1758) (Pisces, Osteichthyes), and a pelagic consumer, Atherina boyeri (Risso, 1810) (Pisces, Osteichthyes) in a Mediterranean coastal lagoon (Lake of Sabaudia) in winter and summer 1999. Trophic differences between the two species throughout the two sampling periods were related to the environmental Trophic Condition (i. e. nutrient and phytopigment concentrations). Although these two fish have different habitats, they both exploited benthic organisms, above all in summer. When the nutrient and phytopigment concentrations were higher (summer), the most abundant benthic organisms were the main food sources for both species. In winter A. boyeri apparently shifted its feeding preferences to include zooplankton, confirming its opportunistic feeding strategy. Particulate organic matter and algae seemed to play the main Trophic role in the food web structure. Benthic invertebrates used both sources, while zooplankton seemed to rely exclusively on the particulate fraction. The overlapping and very depleted signatures of sedimentary and particulate organic matter highlights a strong link between sediments and water column, rarely observed in other aquatic ecosystems using stable isotopes. Such a finding further substantiates the importance of particulate organic matter as a food source in the study area. © 2002 Blackwell Verlag, Berlin
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the effect of temporal changes and environmental Trophic Condition on the isotopic composition omega13c and omega15n of atherina boyeri risso 1810 and gobius niger l 1758 in a mediterranean coastal lagoon lake of sabaudia implications for food web st
Marine Ecology, 2002Co-Authors: Gianluca Sara, Salvatrice Vizzini, Antonio MazzolaAbstract:. ω13C and ω15N of organic matter sources and consumers were employed to analyse Trophic differentiation between a benthic consumer, Gobius niger (L., 1758) (Pisces, Osteichthyes), and a pelagic consumer, Atherina boyeri (Risso, 1810) (Pisces, Osteichthyes) in a Mediterranean coastal lagoon (Lake of Sabaudia) in winter and summer 1999. Trophic differences between the two species throughout the two sampling periods were related to the environmental Trophic Condition (i. e. nutrient and phytopigment concentrations). Although these two fish have different habitats, they both exploited benthic organisms, above all in summer. When the nutrient and phytopigment concentrations were higher (summer), the most abundant benthic organisms were the main food sources for both species. In winter A. boyeri apparently shifted its feeding preferences to include zooplankton, confirming its opportunistic feeding strategy. Par-ticulate organic matter and algae seemed to play the main Trophic role in the food web structure. Benthic invertebrates used both sources, while zooplankton seemed to rely exclusively on the particulate fraction. The overlapping and very depleted signatures of sedimentary and particulate organic matter highlights a strong link between sediments and water column, rarely observed in other aquatic ecosystems using stable isotopes. Such a finding further substantiates the importance of particulate organic matter as a food source in the study area.
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The Effect of Temporal Changes and Environmental Trophic Condition on the Isotopic Composition (ω13C and ω15N) of Atherina boyeri (Risso, 1810) and Gobius niger (L., 1758) in a Mediterranean Coastal Lagoon (Lake of Sabaudia): Implications for Food We
Marine Ecology, 2002Co-Authors: Gianluca Sara, Salvatrice Vizzini, Antonio MazzolaAbstract:. ω13C and ω15N of organic matter sources and consumers were employed to analyse Trophic differentiation between a benthic consumer, Gobius niger (L., 1758) (Pisces, Osteichthyes), and a pelagic consumer, Atherina boyeri (Risso, 1810) (Pisces, Osteichthyes) in a Mediterranean coastal lagoon (Lake of Sabaudia) in winter and summer 1999. Trophic differences between the two species throughout the two sampling periods were related to the environmental Trophic Condition (i. e. nutrient and phytopigment concentrations). Although these two fish have different habitats, they both exploited benthic organisms, above all in summer. When the nutrient and phytopigment concentrations were higher (summer), the most abundant benthic organisms were the main food sources for both species. In winter A. boyeri apparently shifted its feeding preferences to include zooplankton, confirming its opportunistic feeding strategy. Par-ticulate organic matter and algae seemed to play the main Trophic role in the food web structure. Benthic invertebrates used both sources, while zooplankton seemed to rely exclusively on the particulate fraction. The overlapping and very depleted signatures of sedimentary and particulate organic matter highlights a strong link between sediments and water column, rarely observed in other aquatic ecosystems using stable isotopes. Such a finding further substantiates the importance of particulate organic matter as a food source in the study area.
J Trejo - One of the best experts on this subject based on the ideXlab platform.
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Trophic Status In Coastal Waters Of The Yucatan Peninsula (SE, Mexico) Using Water Quality Indicators.
2002Co-Authors: Jorge A. Herrera-silveira, I Medina-gómez, N Aranda-cirerol, A Zaldivar, J Ramírez, J TrejoAbstract:Yucatan Peninsula Coastal ecosystems are being subjected to increasing anthropogenic stresses such as recreational tourism, port development, overfishing, aquiculture as well as population growth, which are affecting coastal water quality. In order to establish a base-line of the Trophic status of different zones along the Yucatan littoral, several seasonal surveys were conducted between 2000 and 2001 in 12 localities, four coastal zones, five bays or coastal lagoons and three ports. Water quality variables analysed were salinity, dissolved oxygen, transparency, dissolved inorganic nitrogen, silica and phosphorus, Chlorophyll-a (Chl-a) as well as various indexes were determined. Results indicate different expression of symptoms, The ports and some coastal lagoons are in euTrophic Conditions as shown by high Chl-a concentrations (>20 mg/m-3) and the levels of dissolved oxygen (c2 mgfl), while other areas with low urban development the symptoms of low Chl-a ( 5 mg/1) suggesting oligoTrophic Condition. These results highlight the need for a comprehensive regional strategy to address this potential problem. We recommend a study of Trophic Condition together with information on nutrient sources and land use as a tool to provide a basis for setting regional priorities for management, monitoring and research.
Salvatrice Vizzini - One of the best experts on this subject based on the ideXlab platform.
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The Effect of Temporal Changes and Environmental Trophic Condition on the Isotopic Composition (omega13C and omega15N) of Atherina boyeri (Risso, 1810) and Gobius niger (L., 1758) in a Mediterranean Coastal Lagoon (Lake of Sabaudia): Implications for
Marine Ecology, 2020Co-Authors: Gianluca Sara, Salvatrice Vizzini, Antonio MazzolaAbstract:δ13C and δ15N of organic matter sources and consumers were employed to analyse Trophic differentiation between a benthic consumer, Gobius niger (L., 1758) (Pisces, Osteichthyes), and a pelagic consumer, Atherina boyeri (Risso, 1810) (Pisces, Osteichthyes) in a Mediterranean coastal lagoon (Lake of Sabaudia) in winter and summer 1999. Trophic differences between the two species throughout the two sampling periods were related to the environmental Trophic Condition (i. e. nutrient and phytopigment concentrations). Although these two fish have different habitats, they both exploited benthic organisms, above all in summer. When the nutrient and phytopigment concentrations were higher (summer), the most abundant benthic organisms were the main food sources for both species. In winter A. boyeri apparently shifted its feeding preferences to include zooplankton, confirming its opportunistic feeding strategy. Particulate organic matter and algae seemed to play the main Trophic role in the food web structure. Benthic invertebrates used both sources, while zooplankton seemed to rely exclusively on the particulate fraction. The overlapping and very depleted signatures of sedimentary and particulate organic matter highlights a strong link between sediments and water column, rarely observed in other aquatic ecosystems using stable isotopes. Such a finding further substantiates the importance of particulate organic matter as a food source in the study area. © 2002 Blackwell Verlag, Berlin
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the effect of temporal changes and environmental Trophic Condition on the isotopic composition omega13c and omega15n of atherina boyeri risso 1810 and gobius niger l 1758 in a mediterranean coastal lagoon lake of sabaudia implications for food web st
Marine Ecology, 2002Co-Authors: Gianluca Sara, Salvatrice Vizzini, Antonio MazzolaAbstract:. ω13C and ω15N of organic matter sources and consumers were employed to analyse Trophic differentiation between a benthic consumer, Gobius niger (L., 1758) (Pisces, Osteichthyes), and a pelagic consumer, Atherina boyeri (Risso, 1810) (Pisces, Osteichthyes) in a Mediterranean coastal lagoon (Lake of Sabaudia) in winter and summer 1999. Trophic differences between the two species throughout the two sampling periods were related to the environmental Trophic Condition (i. e. nutrient and phytopigment concentrations). Although these two fish have different habitats, they both exploited benthic organisms, above all in summer. When the nutrient and phytopigment concentrations were higher (summer), the most abundant benthic organisms were the main food sources for both species. In winter A. boyeri apparently shifted its feeding preferences to include zooplankton, confirming its opportunistic feeding strategy. Par-ticulate organic matter and algae seemed to play the main Trophic role in the food web structure. Benthic invertebrates used both sources, while zooplankton seemed to rely exclusively on the particulate fraction. The overlapping and very depleted signatures of sedimentary and particulate organic matter highlights a strong link between sediments and water column, rarely observed in other aquatic ecosystems using stable isotopes. Such a finding further substantiates the importance of particulate organic matter as a food source in the study area.
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The Effect of Temporal Changes and Environmental Trophic Condition on the Isotopic Composition (ω13C and ω15N) of Atherina boyeri (Risso, 1810) and Gobius niger (L., 1758) in a Mediterranean Coastal Lagoon (Lake of Sabaudia): Implications for Food We
Marine Ecology, 2002Co-Authors: Gianluca Sara, Salvatrice Vizzini, Antonio MazzolaAbstract:. ω13C and ω15N of organic matter sources and consumers were employed to analyse Trophic differentiation between a benthic consumer, Gobius niger (L., 1758) (Pisces, Osteichthyes), and a pelagic consumer, Atherina boyeri (Risso, 1810) (Pisces, Osteichthyes) in a Mediterranean coastal lagoon (Lake of Sabaudia) in winter and summer 1999. Trophic differences between the two species throughout the two sampling periods were related to the environmental Trophic Condition (i. e. nutrient and phytopigment concentrations). Although these two fish have different habitats, they both exploited benthic organisms, above all in summer. When the nutrient and phytopigment concentrations were higher (summer), the most abundant benthic organisms were the main food sources for both species. In winter A. boyeri apparently shifted its feeding preferences to include zooplankton, confirming its opportunistic feeding strategy. Par-ticulate organic matter and algae seemed to play the main Trophic role in the food web structure. Benthic invertebrates used both sources, while zooplankton seemed to rely exclusively on the particulate fraction. The overlapping and very depleted signatures of sedimentary and particulate organic matter highlights a strong link between sediments and water column, rarely observed in other aquatic ecosystems using stable isotopes. Such a finding further substantiates the importance of particulate organic matter as a food source in the study area.
