Salinity as a Major Driver for Submerged Aquatic Vegetation in Coastal Lagoons: a Multi-Year Analysis in the Subtropical Laguna de Rocha

Rodríguez-Gallego, Lorena; Sabaj, Viveka; Masciadri, Silvana; Kruk, Carla; Arocena, Rodrigo; Conde, Daniel

doi:10.1007/s12237-014-9842-1

Cited by 22 publications

(12 citation statements)

References 54 publications

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“…Thus, aquatic vegetation is distributed with species adapted to higher salinity in the lower estuarine portion and species adapted to freshwater in the upper estuarine portion. In fact, salinity has been considered the main variable that determines the distribution of aquatic vegetation in coastal ecosystems (Burgos-Léon et al, 2013;Ribeiro et al, 2015;Rodríguez-Gallego et al, 2015). However, according to these same authors, other abiotic factors in addition to salinity such as sediment nutrient availability, variation in water level and light intensity are responsible for the distribution of aquatic plants in coastal environments (Burgos-Léon et al, 2013;Rodríguez-Gallego et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…In fact, salinity has been considered the main variable that determines the distribution of aquatic vegetation in coastal ecosystems (Burgos-Léon et al, 2013;Ribeiro et al, 2015;Rodríguez-Gallego et al, 2015). However, according to these same authors, other abiotic factors in addition to salinity such as sediment nutrient availability, variation in water level and light intensity are responsible for the distribution of aquatic plants in coastal environments (Burgos-Léon et al, 2013;Rodríguez-Gallego et al, 2015). Biotic interactions may also be important factors in the zonation of aquatic macrophytes in estuarine areas (Barbour, 1978;Crain et al, 2004;Engels & Jensen, 2010;Guo & Pennings, 2012), and the importance of these interactions can vary along the salinity gradient (Greenwood & MacFarlane, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Do interspecific competition and salinity explain plant zonation in a tropical estuary?

Nunes

Camargo

2016

Hydrobiologia

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Environmental gradients and competition influence aquatic macrophyte distribution in estuaries. The competition-to-stress hypothesis states that some species are excluded from lower estuaries (high salinity) due to abiotic stress and others from upper estuaries (low salinity) by competition. The growth of Crinum americanum L. and Spartina alterniflora Loisel. in monoculture (10:0/0:10) and mixed culture (5:5) under different salinity levels (4/12/26) was analysed by a laboratory experiment (3 cultures 9 3 sediment types 9 3 replicate) to understand the role of competition and salinity on the distribution of these species in a tropical estuary as well as to verify whether the competition-to-stress hypothesis explains their zonation. We tested the hypothesis that S. alterniflora is not established in the upper estuary due to the effect of competition with C. americanum, whereas the latter presents restrictions to high salinity and has greater competitive ability in the upper estuary. Our data confirm the competition-to-stress hypothesis but not as proposed originally. We conclude that abiotic stress (low nutrient availability) is responsible for the absence of S. alterniflora in the upper estuary and that the competition between the two species is responsible for the absence of C. americanum in the lower estuary.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Do interspecific competition and salinity explain plant zonation in a tropical estuary?

Nunes

Camargo

2016

Hydrobiologia

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“…Experimental studies have shown that Prorocentrum spp can grow over a broad salinity range [ 10 ]. The wide variation of salinity resulted in a highly dynamic submerged aquatic vegetation community [ 11 ]. The adaptability of algae to salinity and alkalinity is different because of the physiological difference in some species [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Saline-Alkaline Conditions on the Characteristics of Phytoplankton Communities in the Lakes of Songnen Plain, China

et al. 2016

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Many lakes located in the Songnen Plain of China exhibit a high saline-alkaline level. 25 lakes in the Songnen Plain were selected as research objects in this study. Water samples in these lakes were collected from June to August in 2008. Total Dissolved Solids (TDS) and Total Alkalinity (TA) were measured to assess the saline-alkaline level, and partial canonical correspondence analysis (CCA) was conducted as well. The results show that the majority of these lakes in the study area could be categorized into HCO3−-Na+-I type. According to the TDS assessment, of the total 25 lakes, there are 14 for freshwater, 7 for brackish water and 4 for saltwater; and the respective range of TA was from 0.98 to 40.52. The relationship between TA and TDS indicated significant linear relationship (R2 = 0.9292) in the HCO3−-Na+-I type lakes in the Songnen Plain. There was a general trend that cell density, genera richness and taxonomic diversity decreased with the increase of saline-alkaline gradient, whereas a contrary trend was observed for the proportion of dominant species. When the TDS values were above 3×103mg/L and the TA values were above 15mg/L, there was a significant reduction in cell density, genera richness and biodiversity, and their corresponding values were respectively below 10×106 (ind/L), 15 and approximately 2.5. Through the partial canonical correspondence analysis (CCA), 10.7% of the genera variation was explained by pure saline-alkaline variables. Cyclotella meneghiniana, Melosira ambigua and Melosira granulate were found to become the dominant species in most of these lakes, which indicated that there may be rather wide saline-alkaline niches for common dominant species. About one-quarters of the genera which have certain tolerance to salinity and alkalinity preferred to live in the regions with relatively higher saline-alkaline levels in this study.

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“…affecting other processes like solid particles and nutrient resuspension by wind. Moreover, sudden salinity changes driven by frequent sandbar openings may promote a highly fluctuating SAV community, with plants and macroalgae proliferation that could also alternate with phytobenthos and phytoplankton blooms (Rodríguez-Gallego et al, 2015).…”

Section: Introduction Coastal Lagoons and Sandbar Dynamicsmentioning

confidence: 99%

Solutions for Sustainable Coastal Lagoon Management

et al. 2015

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Salinity as a Major Driver for Submerged Aquatic Vegetation in Coastal Lagoons: a Multi-Year Analysis in the Subtropical Laguna de Rocha

Cited by 22 publications

References 54 publications

Do interspecific competition and salinity explain plant zonation in a tropical estuary?

Do interspecific competition and salinity explain plant zonation in a tropical estuary?

Effects of Different Saline-Alkaline Conditions on the Characteristics of Phytoplankton Communities in the Lakes of Songnen Plain, China

Solutions for Sustainable Coastal Lagoon Management

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