Disentangling physical and biological drivers of phytoplankton dynamics in a coastal system

Cianelli, Daniela; D’Alelio, Domenico; Uttieri, Marco; Sarno, Diana; Zingone, Adriana; Zambianchi, Enrico; d’Alcalà, Maurizio Ribera

doi:10.1038/s41598-017-15880-x

Cited by 60 publications

(70 citation statements)

References 54 publications

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“…They have reached quite a wide distribution over the ocean coastlines (Rubio et al, 2017); their high temporal and spatial resolution and their synoptic view allow for a continuous and detailed monitoring of coastal dynamics and of transport processes occurring in coastal areas (Bellomo et al, 2015). The regularity of their data coverage in space and time, and the possibility of processing and disseminating such data in near-real time, makes them extremely valuable in the framework of coastal oceanography both for operational (Falco et al, 2016;Iermano et al, 2016) and for ecological (Helbig and Pepin, 2002;Bassin et al, 2005;Morgan et al, 2012;Cianelli et al, 2017) studies.…”

Section: Hf Radar Datamentioning

confidence: 99%

Linking sardine recruitment in coastal areas to ocean currents using surface drifters and HF radar: a case study in the Gulf of Manfredonia, Adriatic Sea

et al. 2018

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Understanding the role of ocean currents in the recruitment of commercially and ecologically important fish is an important step toward developing sustainable resource management guidelines. To this end, we attempt to elucidate the role of surface ocean transport in supplying recruits of European sardine (Sardina pilchardus) to the Gulf of Manfredonia, a known recruitment area in the Adriatic Sea. Sardine early life history stages (ELHSs) were collected during two cruises to provide observational estimates of their age-size relationship and their passive pelagic larval duration (PPLD). We combine these PPLDs with observations of surface ocean currents to test two hypotheses: (1) ELHSs are transported from remote spawning areas (SAs) by ocean currents to the Gulf of Manfredonia; (2) sardines spawn locally and ELHSs are retained by eddies. A historical surface drifter database is used to test hypothesis 1. Hypothesis 2 is tested by estimating residence times in the Gulf of Manfredonia using surface drifters and virtual particles trajectories that were computed from high-resolution observations of surface currents measured by a high-frequency (HF) radar net-work. Transport to the Gulf of Manfredonia from remote SAs seems more likely than local spawning and retention given a mismatch between observed PPLDs of 30-50 days and relatively short ( < 10-day) average residence times. The number and strength of connections between the gulf and remote SAs exhibit a strong dependence on PPLD. For PPLDs of 20 days or less, the gulf is connected to SAs on the western Adriatic coast through transport in the Western Adriatic Current (WAC). SAs on the east coast are more important at longer PPLDs. SAs in the northern and central Adriatic exhibit weak connections at all PPLD ranges considered. These results agree with otolith microstructure analysis, suggesting that the arrival of larvae in the gulf is characterized by repeated pulses from remote SAs. This is the first attempt to describe the processes related to Lagrangian connection to, and retention in, the Gulf of Manfredonia that will be complemented in the future using validated numerical ocean models and biophysical models.

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Section: Hf Radar Datamentioning

confidence: 99%

Linking sardine recruitment in coastal areas to ocean currents using surface drifters and HF radar: a case study in the Gulf of Manfredonia, Adriatic Sea

et al. 2018

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“…Planktonic environments are influenced by water transport and mixing. At the same time, planktonic communities are deeply affected by the water stratification entailing habitat fragmentation (e.g., Cianelli et al, ). Short‐term environmental changes impact the abundance of planktonic primary producers, ultimately resulting in the rearrangement of trophic links involving their consumers.…”

Section: Discussionmentioning

confidence: 99%

Rewiring and indirect effects underpin modularity reshuffling in a marine food web under environmental shifts

D’Alelio

Mele

Libralato

et al. 2019

Ecology and Evolution

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Species are characterized by physiological and behavioral plasticity, which is part of their response to environmental shifts. Nonetheless, the collective response of ecological communities to environmental shifts cannot be predicted from the simple sum of individual species responses, since co‐existing species are deeply entangled in interaction networks, such as food webs. For these reasons, the relation between environmental forcing and the structure of food webs is an open problem in ecology. To this respect, one of the main problems in community ecology is defining the role each species plays in shaping community structure, such as by promoting the subdivision of food webs in modules—that is, aggregates composed of species that more frequently interact—which are reported as community stabilizers.In this study, we investigated the relationship between species roles and network modularity under environmental shifts in a highly resolved food web, that is, a “weighted” ecological network reproducing carbon flows among marine planktonic species. Measuring network properties and estimating weighted modularity, we show that species have distinct roles, which differentially affect modularity and mediate structural modifications, such as modules reconfiguration, induced by environmental shifts.Specifically, short‐term environmental changes impact the abundance of planktonic primary producers; this affects their consumers’ behavior and cascades into the overall rearrangement of trophic links. Food web re‐adjustments are both direct, through the rewiring of trophic‐interaction networks, and indirect, with the reconfiguration of trophic cascades. Through such “systemic behavior,” that is, the way the food web acts as a whole, defined by the interactions among its parts, the planktonic food web undergoes a substantial rewiring while keeping almost the same global flow to upper trophic levels, and energetic hierarchy is maintained despite environmental shifts. This behavior suggests the potentially high resilience of plankton networks, such as food webs, to dramatic environmental changes, such as those provoked by global change.

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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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Disentangling physical and biological drivers of phytoplankton dynamics in a coastal system

Cited by 60 publications

References 54 publications

Linking sardine recruitment in coastal areas to ocean currents using surface drifters and HF radar: a case study in the Gulf of Manfredonia, Adriatic Sea

Linking sardine recruitment in coastal areas to ocean currents using surface drifters and HF radar: a case study in the Gulf of Manfredonia, Adriatic Sea

Rewiring and indirect effects underpin modularity reshuffling in a marine food web under environmental shifts

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

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