Influence of hydrology on phytoplankton species composition and life strategies in a subtropical coastal lagoon periodically connected with the Atlantic Ocean

Bonilla, Sylvia; Conde, Daniel; Aubriot, Luis; Pérez, Montserrat Lastras

doi:10.1007/bf02696017

Cited by 86 publications

(61 citation statements)

References 36 publications

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“…Schreurs (1992) stressed the features of the lake bottom and the location of the lakes in a windy place as an important factors for appearance of filamentous Cyanophyceae (Oscillatoriales) in the water column. The importance of wind-induced resuspension of bottom sediments on phytoplankton is well recognized in shallow ecosystems (McQuoid and Godhe, 2004;Bonilla et al, 2005), and the shallowness of these lakes certainly makes them susceptible to sediment resuspension. Submerged macrophytes may also have an effect on the phytoplankton taxonomic composition.…”

Section: Discussionmentioning

confidence: 99%

Phytoplankton response to high salinity and nutrient limitation in the eastern Adriatic marine lakes

Carić¹,

Jasprica²,

Čalić³

et al. 2011

Sci. Mar.

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SUMMARY: Phytoplankton and physical-chemical parameters were investigated for the first time in the only natural hyperhaline marine lakes (salinity >40) along Croatia's Adriatic coast, Mala Solina and Velika Solina. Two periods were recognized during the one-year investigation: one euhaline-mesotrophic from December to May and one hyperhalineeutrophic from June to November. Nutrient limitation appears to have been important in defining the lakes' seasonal phytoplankton composition. Phosphate was most likely limiting from October to December, silicate from January to April, and nitrogen from June to September when nitrate was depleted. Diatoms were most abundant in November to January, when temperature and salinity were low and nitrate and ammonium were high. They collapsed in March when silicate was depleted. Amphora, Navicula, and other naviculoid diatoms were the most frequent genera. Nitzschia longissima was the most abundant species. Dinoflagellate dominance began in June in Mala Solina and in March in Velika Solina. It continued while temperature, salinity, phosphate, and silicate were high. Oxyrrhis marina was the most abundant dinoflagellate (3.2 × 10 6 cells L -1 ). Nanophytoplankton was the dominant size fraction. Chroococoid cyanobacteria were most abundant from May to October, reaching 2.9 × 10 7 cells L -1 in July. Both nanophytoplankton and small microphytoplankton, such as Oxyrrhis, Scrippsiella, and Tetraselmis, were most abundant under hyperhaline, N-depleted conditions. Toxic and harmful taxa (e.g. Alexandrium, Dinophysis), expanding in Mediterranean waters, were not recorded in the lakes.Keywords: phytoplankton, hydrography, nutrients, eutrophication, marine lakes, Adriatic Sea. RESUMEN: Respuesta del fitoplancton a la limitación de nutrientes y salinidad elevada en lagunas hipersalinas en el Adriático oriental. -El fitoplancton y diversos parámetros físico-químicos fueron estudiados por primera vez en dos lagunas hiperhalinas naturales (salinidad >40) de la costa de Croacia, Mala Solina y Velika Solina. El estudio se llevó a cabo durante 1 año, y pudieron distinguirse dos períodos: uno euhalino -mesotrófico, de diciembre a mayo, y el otro hiperhalino -eutrófico, de junio a noviembre. La limitación por nutrientes resultó ser un factor determinante para las variaciones estacionales en la composición del fitoplancton de las lagunas. El fosfato fue limitante de octubre a diciembre, el silicato de enero a abril, y el nitrógeno de junio a septiembre, una vez consumido el nitrato. Las diatomeas fueron especialmente abundantes entre noviembre y enero, cuando la temperatura y la salinidad eran bajas y la concentración de nitrato y amonio eran altas. El número de diatomeas disminuyó en marzo, tras el agotamiento del silicato. Amphora, Navicula y otras diatomeas naviculares fueron el género más frecuente, y Nitzschia longissima fue la especie más abundante. La dominancia de dinoflagelados comenzó en junio en Mala Solina y en marzo en Velika Solina, y se mantuvo mientras la temperatura, la salinidad, y la...

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Section: Discussionmentioning

confidence: 99%

Phytoplankton response to high salinity and nutrient limitation in the eastern Adriatic marine lakes

Carić¹,

Jasprica²,

Čalić³

et al. 2011

Sci. Mar.

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“…On the other hand, every part of the river flow simultaneously differs from every other part and, so, is quite counterintuitive: "Flowing" does not necessarily mean either "mixed" or "uniform" [58]. Bonilla et al [4] found that differences in phytoplankton biomass, main taxonomic groups, and strategies were more relevant to hydrological dynamics than seasonal and spatial differences. Many field studies have demonstrated that the biomass of diatoms depend on the change of hydrological regimes in the lotic waters [20,35,41].…”

Section: Photosynthetic Parameters and Cellular Chl A Concentrationmentioning

confidence: 99%

Can Hydrodynamics Change Phosphorus Strategies of Diatoms?—Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems

2011

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Diatom blooms occur in many water bodies worldwide, causing significant ecological and social concerns. In order to understand the mechanisms of diatom blooms formation, the effects of varying phosphorus (P) concentration and hydrodynamics on the growth of diatoms were studied by combining results from field observations and laboratory experiments. The field investigation showed that spring diatom blooms (Cyclotella meneghiniana and Stephanodiscus hantzschii) occurred in Lake Taihu and Hanjiang River with similar environmental factors such as water temperature, pH, and dissolved oxygen in 2008. Concentrations of total phosphorus (TP), total nitrogen, and ammonia nitrogen (NH 4 -N) in Lake Taihu were significantly higher than the concentrations in the Hanjiang River. Laboratory experiments were conducted to evaluate growth and physiological responses of four lotic diatoms (Cyclotella atomus, Fragilaria crotonensis, Nitzschia palea, and S. hantzschii, isolated from the Hanjiang River) and three lentic diatoms (C. meneghiniana, Melosira varians, and Stephanodiscus minutulus, isolated from Lake Taihu, Lake Donghu, and Guanqiao Pond, respectively) to various P concentrations under smallscale turbulent and standing conditions. Our results showed that, with turbulence, lotic diatoms C. atomus, F. crotonensis, N. palea, and S. hantzschii demonstrated a significant increase in affinity for P compared with lentic diatoms C. meneghiniana, M. varians, and S. minutulus. Moreover, lotic diatoms C. atomus, F. crotonensis, and N. palea had higher growth rates and photosynthetic efficiencies with small-scale turbulence than with standing conditions both in P-limited and P-replete conditions. Lotic species S. hantzschii and three lentic diatoms (C. meneghiniana, M. varians, and S. minutulus) grew well under standing conditions. Our results may explain our field observation that the occurrence of diatom blooms in lakes is often associated with higher TP concentrations whereas in rivers, diatom blooms occur at a wide range of TP concentrations under flows. Therefore, different hydrodynamics and nutrient concentrations determined the dominant diatom species, according to their habitat-dependent physiological characteristics.

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“…Traditionally, phytoplankton assemblages were described at the level of main phylogenetic groups (Bonilla et al 2005). However, such an approach cannot accurately reflect the functioning of an ecosystem (Padisa´k et al 2006;Costa et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Seasonal dynamics of phytoplankton functional groups and its relationship with the environment in river: a case study in northeast China

Yu¹,

Wu²,

Ma³

et al. 2012

Journal of Freshwater Ecology

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In this study, the concept of functional groups was applied for the first time to the seasonal dynamics of the phytoplankton community of Mudanjiang River (northeast China). The environmental variables as well as the phytoplankton communities were determined in 2007. The river showed strong seasonal fluctuations in water physical and chemical condition. A total of 11 phytoplankton functional groups (C, D, E, J, MP, P, T, T B , W1, X2 and Y) were identified that included 30 species. Groups C (Asterionella formosa and Cyclotella meneghiniana), MP (Cocconeis placentula, Cymatopleara solea, Diatoma vulgare, Ochromonas fragilis, Pinnularia major and Ulothrix variabilis), P (Fragilaria capucina, Fragilaris sp., Aulacoseira granulate and Aulacoseira granulate var. angustissima), T B (Aulacoseira varians and Navicula exigua, Navicula radiosa), X2 (Chlamydomonas sp.) and Y (Chroomonas acuta, Cryptomonas ovata, and Cryptomonas sp.) were the dominant groups during the study period. Mudanjiang River phytoplankton functional groups exhibited a noticeable seasonality in which group Y was predominant in the winter and spring associated with greater soluble reactive phosphorus availability, group MP in the summer associated with ammonium-nitrogen availability, and group P in autumn associated with greater transparency. This study underscores the usefulness of functional groups in studying phytoplankton dynamics in this river, in which phytoplankton dynamics can be significantly affected by tourism.

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Influence of hydrology on phytoplankton species composition and life strategies in a subtropical coastal lagoon periodically connected with the Atlantic Ocean

Cited by 86 publications

References 36 publications

Phytoplankton response to high salinity and nutrient limitation in the eastern Adriatic marine lakes

Phytoplankton response to high salinity and nutrient limitation in the eastern Adriatic marine lakes

Can Hydrodynamics Change Phosphorus Strategies of Diatoms?—Nutrient Levels and Diatom Blooms in Lotic and Lentic Ecosystems

Seasonal dynamics of phytoplankton functional groups and its relationship with the environment in river: a case study in northeast China

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