Effect of diatom morphology on the small-scale behavior of the copepod Temora stylifera (Dana, 1849)

Mahadik, Gauri A.; Castellani, Claudia; Mazzocchi, Maria Grazia

doi:10.1016/j.jembe.2017.05.001

Cited by 4 publications

(3 citation statements)

References 64 publications

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“…1 mm long) were entrained into the feeding current generated by the copepod Temora longicornis , the diatoms were rotated to align with their long axis parallel to streamlines; however, the fate of the diatoms was not reported [ 50 ]. The feeding-current feeding copepod Temora stylifera displayed longer feeding bouts, lower appendage beat frequency, and shorter grooming events when offered solitary diatoms than when offered diatom chains [ 51 ].…”

Section: Discussionmentioning

confidence: 99%

The swim-and-sink behaviour of copepods: a revisit to mechanical power requirement and a new hypothesis on function

Jiang

2023

R. Soc. open sci.

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Many copepods display a swim-and-sink behaviour, which is not energetically efficient but probably aids in perceiving and capturing diatom chains. Here, computational fluid dynamics was employed to calculate the mechanical power required by a negatively buoyant, self-propelled copepod in swim-and-sink versus hovering. The results show that upward swim-and-sink about a fixed depth always demands more power than hovering. Subsequently, high-speed microscale imaging was employed to observe the copepod Centropages sp. in swim-and-sink, specifically its encounter and handling of diatom chains for capture, along with the measured alternating swimming and sinking currents imposed by the swim-and-sink copepod. The findings suggest that during upward swimming, the copepod uses its swimming current to scan the fluid for detecting embedded diatom chains, presumably through chemoreception. Once a diatom chain is perceived, the copepod sinks and uses its sinking current to manipulate the orientation of the diatom chain before swimming upward to capture it. Overall, these results propose a hypothesis that swim-and-sink is an innate behaviour that assists copepods in perceiving and manoeuvring diatom chains for capture. In contrast with near-spherical algae, diatom chains predominately exhibit a horizontal orientation in the ocean, necessitating vertically oriented copepods to possess a handling behaviour that manoeuvres diatom chains for capture.

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Section: Discussionmentioning

confidence: 99%

The swim-and-sink behaviour of copepods: a revisit to mechanical power requirement and a new hypothesis on function

Jiang

2023

R. Soc. open sci.

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“…5d) would have hardly been attributed to a genus that is mainly identified by its conspicuous colonial stages (Zingone et al 1999a). Successfully, taxonomic research at LTER-MC has retained a traditional morphological approach at the same time as embracing different aspects of the species identity, such as phylogeny (Kooistra et al 2010, Gaonkar et al 2018, life cycles (Levialdi Ghiron et al 2008, Amato et al 2005, D'Alelio et al 2009b, mating compatibility with closely related species (Amato et al 2007, D'Alelio et al 2009a, biochemistry (Lamari et al 2013, Nanjappa et al 2014b, physiology and metabolomics (Degerlund et al 2012, feeding strategies (Modigh andFranzè 2009, Mahadik 2014), behavior (Bianco et al 2013, Mahadik et al 2017 as well as ecological aspects like species diversity during blooms (Orsini et al 2004) and phenology (Cerino et al 2005, D'Alelio et al 2010. It was precisely the latter trait, which can only be inferred from long-term observations, that draw attention to certain taxa, e.g., 'Skeletonema costatum (Greville) Cleve' showing different seasonality between the Tyrrhenian and Adriatic seas, or 'Leptocylindrus danicus Cleve' occurring all year round in the GoN.…”

Section: Plankton Diversity At Lter-mcmentioning

confidence: 99%

“…Grazing experiments in the GoN involving the lower levels of the plankton food-web, namely phyto-and microzooplankton, have revealed: i) a seasonality in the consumption of phytoplankton by microzooplankton, with higher rates during winter compared to spring and summer (> ~30%) (Modigh and Franzè 2009); and ii) a strong 'cannibalism' among heterotrophic protists, with up to 78% of microzooplankton production not exported to higher trophic levels but consumed within microbial trophicloops (Franzè and Modigh 2013). Furthermore, grazing experiments with diatoms suggested that copepods from LTER-MC, despite size-selectivity, display a predominantly generalist and plastic trophic behavior (Mahadik 2014, Mahadik et al 2017.…”

Section: Biological Interactionsmentioning

confidence: 99%

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

Zingone¹,

D’Alelio²,

Mazzocchi³

et al. 2019

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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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Secretion mechanism and adhesive mechanism of diatoms: Direct evidence from the quantitative analysis

Guan

Chen

Sun

et al. 2021

Micron

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Effect of diatom morphology on the small-scale behavior of the copepod Temora stylifera (Dana, 1849)

Cited by 4 publications

References 64 publications

The swim-and-sink behaviour of copepods: a revisit to mechanical power requirement and a new hypothesis on function

The swim-and-sink behaviour of copepods: a revisit to mechanical power requirement and a new hypothesis on function

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

Secretion mechanism and adhesive mechanism of diatoms: Direct evidence from the quantitative analysis

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