Colonisation and succession of marine biofilm-dwelling ciliates in response to environmental variation

Watson, Matthew G.; Scardino, Andrew J.; Zalizniak, Liliana; Shimeta, Jeff

doi:10.3354/ame01731

Cited by 9 publications

(4 citation statements)

References 39 publications

(57 reference statements)

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“…Preparation of coupon Watson et al [2014] and longer term fouling assemblages by Choi et al Choi et al [2013]. After the exposure period the coupon was photographed and then air dried for 7 days prior to storing at -18…”

Section: The Test Surfacementioning

confidence: 99%

An assessment of the ship drag penalty arising from light calcareous tubeworm fouling

et al. 2016

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A test coupon coated with light calcareous tubeworm fouling was scanned, scaled and reproduced for wind-tunnel testing to determine the equivalent sand grain roughness ks. It was found that this surface had a ks = 0.325 mm, substantially less than previously reported values for light calcareous fouling. Any number of variations in surface topology could account for these different report values, such as sparseness, differences in species settlement etc. The experimental results were used to predict the drag on a fouled full scale ship. To achieve this, a modified method for predicting the total drag of a spatially developing turbulent boundary layer (TBL), such as that on the hull of a ship, is presented. The method numerically integrates the skin friction over the length of the boundary layer, assuming a widely accepted analytical form for the mean velocity profile of the TBL. The velocity profile contains the roughness (fouling) information, such that the prediction requires only an input of ks, free-stream velocity (ship speed), kinematic viscosity and the length of the boundary layer (hull length). Using the equivalent sandgrain roughness height determined from experiments, a FFG-7 Oliver Perry class Frigate is predicted to experience a 23% increase in total resistance at cruise, if its hull is coated in light calcareous tubeworm fouling. A similarly fouled Very Large Crude Carrier would experience a 34% increase in total resistance at cruise. turbulent boundary layer, skin friction drag, roughness, tubeworms

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Section: The Test Surfacementioning

confidence: 99%

An assessment of the ship drag penalty arising from light calcareous tubeworm fouling

et al. 2016

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“…1-2 cm) is best suited for the ingestion of microphytoplankton in the water column, their prey size is limited by the mouth gape, which varies from 0.11 to 0.28 cm, villiform type teeth and short gill rakers also limited their ability to catch and chew larger prey (Wongchinawit & Paphavasit, 2009). Nevertheless, the predominant prey species of the juvenile S. argus examined in the present study were bryozoans, ciliates, polychaetae, and green algae, all of which are common benthic or sessile fouling organisms (Beech & Landers, 2002;Marroig & Reis, 2011;Tovar-Hernandez, Mendez, & Villalobos-Guerrero, 2009;Watson, Scardino, Zalizniak, & Shimeta, 2015). Therefore, as an adaptation to anthropogenic habitat modification, it is assumed that the juvenile fish have shifted from planktonic to benthic feeding.…”

Section: Discussionmentioning

confidence: 75%

Unexpected prey of juvenile spotted scat (Scatophagus argus) near a wharf: The prevalence of fouling organisms in stomach contents

Lin

Liu

et al. 2018

Ecology and Evolution

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A knowledge of fish diets can contribute to revealing the trophic role and ecological function of species in aquatic ecosystems. At present, however, there are no efficient or comprehensive methods for analyzing fish diets. In this study, we investigated the diets of juvenile Scatophagus argus collected near a wharf in Daya Bay, China, by dissection and high‐throughput sequencing (HTS) using the 18S rDNA V4 region. Microscopy disclosed large amounts of bryozoans and unrecognizable detritus. In contrast, HTS analysis indicated that the fish diets were considerably more diverse than visual inspection suggested. After eliminating fish sequences, approximately 17,000 sequences from taxa in nine phyla (Ciliophora, Bryozoa, Annelida, Bacillariophyta, Chlorophyta, Arthropoda, Dinoflagellata, Tunicata, and Phaeophyta) were identified from the analysis of stomach contents. Twenty‐one food categories were identified, most of which (95.2%) were benthic fouling organisms that could easily be collected around wharfs. These consisted of bryozoans (31.9%), ciliates (45.7%), polychaetes (14.6%), and green algae (3.0%). Therefore, to adapt to anthropogenic habitat modification, the fish had probably shifted from planktonic to benthic feeding. The prevalence of fouling organisms in the stomachs of juvenile S. argus indicates that the fish have responded to habitat changes by widening their food spectrum. This adaptation may have increased their chances of survival. The fouling organisms that inhabit highly perturbed coastal ecosystems could represent a food source for animals at higher trophic levels. Our results accordingly suggest that human activity might significantly influence fish feeding behavior and material transfer along the food chain.

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“…were found to be reduced by mussels filtration. These two surface-associated ciliates are frequent and abundant in marine snow ( Artolozaga et al, 1997 ), estuaries ( Mironova, Telesh & Skarlato, 2012 ), while they also occur as lagoon and wastewater treatment plants epiphytes ( Martín-Cereceda, Serrano & Guinea, 1996 ; Dhib et al, 2013 ), as well as biofouling microorganisms ( Watson et al, 2015 ). Their high abundance is probably related to the high turbidity levels in the tanks ( Delegrange et al, 2015 ), providing multiple niches to proliferate.…”

Section: Discussionmentioning

confidence: 99%

Mussel biofiltration effects on attached bacteria and unicellular eukaryotes in fish-rearing seawater

Voudanta

Kormas

Monchy

et al. 2016

PeerJ

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Mussel biofiltration is a widely used approach for the mitigation of aquaculture water. In this study, we investigated the effect of mussel biofiltration on the communities of particle-associated bacteria and unicellular eukaryotes in a sea bass aquaculture in southern North Sea. We assessed the planktonic community changes before and after biofiltration based on the diversity of the 16S and 18S rRNA genes by using next generation sequencing technologies. Although there was no overall reduction in the operational taxonomic units (OTU) numbers between the control (no mussels) and the test (with mussels) tanks, a clear reduction in the relative abundance of the top three most dominant OTUs in every sampling time was observed, ranging between 2–28% and 16–82% for Bacteria and Eukarya, respectively. The bacterial community was dominated by OTUs related to phytoplankton blooms and/or high concentrations of detritus. Among the eukaryotes, several fungal and parasitic groups were found. Their relative abundance in most cases was also reduced from the control to the test tanks; a similar decreasing pattern was also observed for both major higher taxa and functional (trophic) groups. Overall, this study showed the effectiveness of mussel biofiltration on the decrease of microbiota abundance and diversity in seawater fueling fish farms.

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Colonisation and succession of marine biofilm-dwelling ciliates in response to environmental variation

Cited by 9 publications

References 39 publications

An assessment of the ship drag penalty arising from light calcareous tubeworm fouling

An assessment of the ship drag penalty arising from light calcareous tubeworm fouling

Unexpected prey of juvenile spotted scat (Scatophagus argus) near a wharf: The prevalence of fouling organisms in stomach contents

Mussel biofiltration effects on attached bacteria and unicellular eukaryotes in fish-rearing seawater

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