Clonal expansion behind a marine diatom bloom

Ruggiero, Maria Valeria; D’Alelio, Domenico; Ferrante, Maria Immacolata; Santoro, Mariano; Vitale, Laura; Procaccini, Gabriele; Montresor, Marina

doi:10.1038/ismej.2017.181

Cited by 39 publications

(63 citation statements)

References 51 publications

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“…It will also be necessary to systematically understand the mechanisms by which microbes affect each other in diverse populations. This is particularly important as it is still challenging to resolve these processes in natural populations with commonly used methods, and intraspecific diversity is often too high to identify such patterns (e.g., Godhe et al, 2016;Ruggiero et al, 2017;Rynearson & Armbrust, 2005).…”

Section: Ecological Implicationsmentioning

confidence: 99%

Company matters: The presence of other genotypes alters traits and intraspecific selection in an Arctic diatom under climate change

Wolf

Romanelli

Rost

et al. 2019

Global Change Biology

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Arctic phytoplankton and their response to future conditions shape one of the most rapidly changing ecosystems on the planet. We tested how much the phenotypic responses of strains from the same Arctic diatom population diverge and whether the physiology and intraspecific composition of multistrain populations differs from expectations based on single strain traits. To this end, we conducted incubation experiments with the diatom Thalassiosira hyalina under present‐day and future temperature and pCO2 treatments. Six fresh isolates from the same Svalbard population were incubated as mono‐ and multistrain cultures. For the first time, we were able to closely follow intraspecific selection within an artificial population using microsatellites and allele‐specific quantitative PCR. Our results showed not only that there is substantial variation in how strains of the same species cope with the tested environments but also that changes in genotype composition, production rates, and cellular quotas in the multistrain cultures are not predictable from monoculture performance. Nevertheless, the physiological responses as well as strain composition of the artificial populations were highly reproducible within each environment. Interestingly, we only detected significant strain sorting in those populations exposed to the future treatment. This study illustrates that the genetic composition of populations can change on very short timescales through selection from the intraspecific standing stock, indicating the potential for rapid population level adaptation to climate change. We further show that individuals adjust their phenotype not only in response to their physicochemical but also to their biological surroundings. Such intraspecific interactions need to be understood in order to realistically predict ecosystem responses to global change.

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Section: Ecological Implicationsmentioning

confidence: 99%

Company matters: The presence of other genotypes alters traits and intraspecific selection in an Arctic diatom under climate change

Wolf

Romanelli

Rost

et al. 2019

Global Change Biology

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“…6) in samples collected at LTER-MC over four consecutive years (Tesson et al 2014). This result, further confirmed in two subsequent years (Ruggiero et al 2018), has been interpreted as the outcome of genetic recombination regularly occurring in this species (D'Alelio et al 2009a(D'Alelio et al , 2010 coupled with the rapid diversification during vegetative growth (Tesson et al 2013). Interestingly, during the autumn bloom in 2013, a 'clonal expansion' event took place, with the sudden increase of diversification by mutation and the subsequent dominance of a single genotype.…”

Section: Plankton Diversity At Lter-mcmentioning

confidence: 52%

Time series and beyond: multifaceted plankton research at a marine Mediterranean LTER site

Zingone¹,

D’Alelio²,

Mazzocchi³

et al. 2019

Self Cite

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Plankton are a pivotal component of the diversity and functioning of coastal marine ecosystems. A long time-series of observations is the best tool to trace their patterns and variability over multiple scales, ultimately providing a sound foundation for assessing, modelling and predicting the effects of anthropogenic and natural environmental changes on pelagic communities. At the same time, a long time-series constitutes a formidable asset for different kinds of research on specific questions that emerge from the observations, whereby the results of these complementary studies provide precious interpretative tools that augment the informative value of the data collected. In this paper, we review more than 140 studies that have been developed around a Mediterranean plankton time series gathered in the Gulf of Naples at the station LTER-MC since 1984. These studies have addressed different topics concerning marine plankton, which have included: i) seasonal patterns and trends; ii) taxonomic diversity, with a focus on key or harmful algal species and the discovery of many new taxa; iii) molecular diversity of selected species, groups of species or the whole planktonic community; iv) life cycles of several phyto- and zooplankton species; and v) interactions among species through trophic relationships, parasites and viruses. Overall, the products of this research demonstrate the great value of time series besides the record of fluctuations and trends, and highlight their primary role in the development of the scientific knowledge of plankton much beyond the local scale.

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“…To this latter respect, the presence of Long Term Ecological Research sites (LTER, [84]) in the waterfront of urbanized areas hosting open-water aquacultures, such as in the Gulf of Naples (Naples, Italy, [85]), guarantees the collection of data useful to track the passive transportation of HAB species, their demography and also the contribution of these organisms to the aquatic food webs [86][87][88]. These data can feed systems ecology by allowing the integration of ecosystem modelling into aquaculture management [89].…”

Section: Road-mapping the Costal Management: Systems Ecology And Citimentioning

confidence: 99%

Combining Marine Ecology and Economy to Roadmap the Integrated Coastal Management: A Systematic Literature Review

2019

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Integrated coastal management (ICM) relies on the inclusion of economic issues within marine ecology. To assess the progress of this integration, we applied topic modelling and network analysis to explore the pertinent literature (583 Isi-WoS, and 5459 Scopus papers). We classified the topics of interest (i.e., concepts, approaches, and sectors) that combined ecological and economic issues within marine science, we aggregated these topics in fields pertinent to ICM, and tracked the knowledge-exchange between these fields by using an information-flow network. Main findings were: (i) the high trans-disciplinary fashion of studies about marine protection and of those about commercial fisheries, (ii) the weak interaction between studies focusing on potential biohazards and those about environmental management, (iii) the isolation, in the overall information-flow, of studies about ecotourism and aquaculture. We included in a roadmap all the integration routes we detected within ICM, based on the combination of ecological and economic issues. We conclude that, to improve integration, ICM should: (i) Exploit marine protection as a bridge between ecological and economic concepts and approaches, and between maritime economy sectors, (ii) employ systems ecology to pursue trans-disciplinary investigations, (iii) complement systems ecology with citizen science by means of inclusive economic initiatives, such as ecotourism.

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Clonal expansion behind a marine diatom bloom

Cited by 39 publications

References 51 publications

Company matters: The presence of other genotypes alters traits and intraspecific selection in an Arctic diatom under climate change

Company matters: The presence of other genotypes alters traits and intraspecific selection in an Arctic diatom under climate change

Time series and beyond: multifaceted plankton research at a marine Mediterranean LTER site

Combining Marine Ecology and Economy to Roadmap the Integrated Coastal Management: A Systematic Literature Review

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