Effects of warming on a Mediterranean phytoplankton community

Pulina, Silvia; Brutemark, Andreas; Suikkanen, Sanna; Padedda, Bachisio Mario; Grubisic, Lorena M.; Satta, Cecilia Teodora; Caddeo, Tiziana; Farina, Pasqualina; Sechi, Nicola; Lugliè, Antonella Gesuina Laura

doi:10.5194/we-16-89-2016

Cited by 17 publications

(12 citation statements)

References 19 publications

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“…Moreover, numerous studies have similarly reported a positive correlation between cyanobacteria abundance and temperature (Maugendre et al 2015;Chen and Laws 2017;Trombetta et al 2019), even during a fall bloom in the St. Lawrence Estuary (Bénard et al 2018). In addition, previous studies have reported higher abundances of pico-and nanophytoplankton under warmer temperatures (Pulina et al 2016;Trombetta et al 2019). In the present investigation, this trend was also observed for nanophytoplankton over the course of the experiment, but not for picoeukaryotes.…”

Section: Nanophytoplankton Cyanobacteria Bacteria and Virus Abundanmentioning

confidence: 88%

“…For instance, an experimental increase in water temperature was reported to affect the relative abundance of phytoplankton, favouring small phytoplankton cells in the community, such as pico-and nanophytoplankton (Pulina et al 2016). Additionally, using in situ mesocosms, Vidussi et al (2011) reported a significant decrease in bacterial abundance, noting that trophic cascades led to this change.…”

Section: Introductionmentioning

confidence: 99%

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Effects of experimental warming on small phytoplankton, bacteria and viruses in autumn in the Mediterranean coastal Thau Lagoon

et al. 2021

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To investigate the responses of a natural microbial plankton community of coastal Mediterranean waters to warming, which are still poorly known, an in situ mesocosm experiment was carried out in Thau Lagoon during autumn 2018. Several microorganisms, including virio-, bacterio-, and phytoplankton < 10 µm in size, were monitored daily and analysed using flow cytometry for 19 consecutive days in six mesocosms. Three mesocosms (control) had the same natural water temperature as the lagoon, and the other three were warmed by + 3 °C in relation to the control temperature. The cytometric analyses revealed an unexpected community dominated by picophytoplanktonic cells, including Prochlorococcus-like and Picochlorum-like cells, which had not previously been found in Thau Lagoon. The experimental warming treatment increased the abundances of nanophytoplankton, cyanobacteria, bacteria and viruses during the experiment and triggered earlier blooms of cyanobacteria and picoeukaryotes. Only the abundance of Picochlorum-like cells was significantly reduced under warmer conditions. The growth and grazing rates of phytoplankton and bacterioplankton estimated on days 2 and 8 showed that warming enhanced the growth rates of most phytoplankton groups, while it reduced those of bacteria. Surprisingly, warming decreased grazing on phytoplankton and bacteria at the beginning of the experiment, while during the middle of the experiment it decreased the grazing on prokaryote only but increased it for eukaryotes. These results reveal that warming affected the Thau Lagoon plankton community from viruses to nanophytoplankton in fall, inducing changes in both dynamics and metabolic rates.

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Section: Nanophytoplankton Cyanobacteria Bacteria and Virus Abundanmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Effects of experimental warming on small phytoplankton, bacteria and viruses in autumn in the Mediterranean coastal Thau Lagoon

et al. 2021

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“…Depth, transparency, temperature, salinity, dissolved oxygen (DO) and pH were directly measured in situ using portable equipment (Secchi disk, WTW multi 340i/SET, Wissenschaftlich-Technische Werkstätten, Dr-Karl-Slevogt-Straße 1, 82362, Weilheim, Germany). Discrete surface water samples were collected in 1 L polyethylene bottles and preserved at 4 • C for laboratory analysis of the following nutrients: NH 4 + -N, NO 2 − -N, NO 3 − -N, PO 4 −3 -P. Water samples for dissolved nutrients analyses were filtered using 0.45 µm pore size filters and immediately frozen (T = −20 • C) until analysis, while Chlorophyll-a (Chl-a; µg/L) extraction was conducted in 90% acetone for 24 h. All concentrations were measured according to American Public Health Association (APHA) [41]. For total phosphorus (TP), water samples were collected before filtering.…”

Section: Sampling Design Of Water Quality and Aquatic Macrophytesmentioning

confidence: 99%

“…Therefore, they represent an ecotone between marine, fresh-water, and terrestrial ecosystems showing some typical characteristics of all these types [1]. These characteristics often result in considerable seasonal changes of environmental variables (e.g., temperature, salinity) and large fluctuations in chemical parameters with consequences to many resident species [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Environmental Variability and Macrophyte Assemblages in Coastal Lagoon Types of Western Greece (Mediterranean Sea)

Christia

Giordani

Papastergiadou

2018

Water

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Coastal lagoon types of Western Greece were allocated to a spectrum of meso to polyhaline chocked lagoons; poly to euhaline restricted lagoons; and euhaline restricted lagoons along the Ionian Sea coast. This diversity comprises wide ranges of physical, chemical and environmental parameters in a seasonal and annual scale, which explains the variability in the distribution of benthic macrophytes. Four different macrophyte assemblages were distinguished, characterized by annual or perennial species. Extensive statistical analysis showed that salinity and nitrate concentrations had a great impact on the composition and distribution of macrophyte assemblages into lagoon types that also changed their abundance on a seasonal and annual scale. During the monitoring period, an important salinity shift in a chocked lagoon might cause the gradual loss of Zostera noltii and its replacement by Ruppia cirrhosa. Restricted lagoons were characterized by higher species diversity, while the other three identified macrophyte assemblages were dominated by the angiosperms Ruppia cirrhosa and Cymodocea nodosa. This integrated study of coastal lagoons is likely to be broadly applicable, since it was based on important parameters affecting such ecosystems, and the provided links between macrophyte assemblages and abiotic factors are of critical importance to improve management and environmental policies.

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“…Both global warming and eutrophication can mutually reinforce the symptoms and problems connected with them (Moss et al 2011). The abundance of relatively small-sized taxa, which also includes cyanobacteria, can increase significantly, while large-sized diatoms decrease because of climate warming (Pulina et al 2016). Consequently, cyanobacteria species become phytoplankton dominants, and since they are less edible for zooplankton, this can diminish energy flow to higher trophic levels (Elliott 2012).…”

Section: Introduction Phytoplankton Growth Patterns and Dominance Shiftsmentioning

confidence: 99%

Phytoplankton response to fish-induced environmental changes in a temperate shallow pond-type lake

Napiórkowska‐Krzebietke

2017

Archives of Polish Fisheries

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Since 1967, the temperate, shallow, pond-type Lake Warniak has been subjected to different biomanipulation methods including the introduction of common carp,Cyprinus carpioL., grass carp,Ctenopharyngodon idella(Val.), silver carp,Hypophthalmichthys molitrix(Val.), and bighead carp,Hypophthalmichthys nobilis(Richardson) and then their removal in an effort to control macrophytes and phytoplankton. Recently, pilot stocking with predatory fish, particularly pike,Esox luciusL., has also been conducted. Hence, an examination of the long-term response patterns of phytoplankton to multiple fish-induced stressors was undertaken. In recent years,Charadomination (2000-2004) has helped to stabilize a clear-water state, high/good ecological status, and meso-eutrophic conditions. After the disappearance of Charales in 2004, the rapid, unstable changes in phytoplankton biomass, structure, and biodiversity suggested a shift toward a turbid-water state. As a result, the phytoplankton assemblages changed from those dominated by cryptophytes Y+X2+X1+LO(2000-2004) through those dominated by cyanobacteria K (2005-2008), dinoflagellates LO+Y (2009-2011), and cryptophytes Y+LO+F+X2 (2012), to those dominated by diatoms D+K+P+A (2013-2014) with representative taxa that occur in nutrient-rich and/or nutrient-poor water bodies. The 1967-2014 changes indicated that four periods, two with clear-water state and two with turbid-water state, alternately, one after the other, resulted from different fish pressure. Higher autochthonous fish biomass was usually accompanied by lower phytoplankton biomass. In contrast, the introduction of Cyprinidae fish had a stimulating effect on summer phytoplankton dominated by cyanobateria. Among the nutrients, only phosphorus played an important role.

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Effects of warming on a Mediterranean phytoplankton community

Cited by 17 publications

References 19 publications

Effects of experimental warming on small phytoplankton, bacteria and viruses in autumn in the Mediterranean coastal Thau Lagoon

Effects of experimental warming on small phytoplankton, bacteria and viruses in autumn in the Mediterranean coastal Thau Lagoon

Environmental Variability and Macrophyte Assemblages in Coastal Lagoon Types of Western Greece (Mediterranean Sea)

Phytoplankton response to fish-induced environmental changes in a temperate shallow pond-type lake

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