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Articles on Plankton
Coherent dynamics and association networks among lake bacterioplankton taxa.
We used 454 pyrosequencing of 16S rRNA genes to study associations of different bacterioplankton groups to environmental characteristics and their co-occurrence patterns over an annual cycle in a dimictic lake. Clear seasonal succession of the bacterioplankton community was observed. After binning o...
Ocean time-series reveals recurring seasonal patterns of virioplankton dynamics in the northwestern Sargasso Sea.
There are an estimated 10(30) virioplankton in the world oceans, the majority of which are phages (viruses that infect bacteria). Marine phages encompass enormous genetic diversity, affect biogeochemical cycling of elements, and partially control aspects of prokaryotic production and...
Long-term effects of ocean warming on the prokaryotic community: evidence from the vibrios.
We overcame this gap by applying a retrospective molecular analysis to the bacterial community on formalin-fixed samples from the historical Continuous Plankton Recorder archive, which is one of the longest and most geographically extensive collections of marine biological samples in the world. We s...
Metatranscriptomic analysis of ammonia-oxidizing organisms in an estuarine bacterioplankton assemblage.
We analyzed the MG1C sequences in metatranscriptomes from these samples to gain an insight into the metabolism of MG1C population growing in the environment, and for comparison with ammonia-oxidizing bacteria (AOB) in the same samples. Assemblies revealed low diversity within sequences assigned to m...
Seasonal patterns of the bacterioplankton community composition in a lake threatened by a pesticide disposal site.
BACKGROUND AIM AND SCOPE: The objective of the study was to determine the effects of ca. 35 years of pesticide contamination (pesticide dump-PD) of Lake Szeląg Wielki (located in the north-eastern Poland) on changes in the microbial communities of aquatic ecosystems. In the years 2...
Comparative metagenomics of bathypelagic plankton and bottom sediment from the Sea of Marmara.
We produced metagenomic data by direct 454 pyrosequencing from bathypelagic plankton (1000 m depth) and bottom sediment of the Sea of Marmara, the gateway between the Eastern Mediterranean and the Black Seas. Data from small subunit ribosomal RNA (SSU rRNA) gene libraries and direct pyrosequencin...
Metagenome-based analysis: a promising direction for plankton ecological studies.
The plankton community plays an especially important role in the functioning of aquatic ecosystems and also in biogeochemical cycles. Since the beginning of marine research expeditions in the 1870 s, an enormous number of planktonic organisms have been described and studied. Plankton...
In situ monitoring of antibiotic susceptibility of bacterial biofilms in a microfluidic device.
We present a simple, novel one-pot assay for the analysis of antibiotic susceptibility of bacterial biofilms using a microfluidics system where continuous concentration gradients of antibiotics are generated. The results of minimal biofilm eradication concentration (MBEC) clearly confirm that the co...
Inorganic and methylmercury: Do they transfer along a tropical coastal food web?
Methylmercury (MeHg) and inorganic mercury (Hg(inorg)) were evaluated in the water of a Brazilian estuary, with two size classes of plankton and seven fish species of different feeding habits. Water partition coefficients (PCs) in microplankton were fourfold higher for MeHg than for Hg(inorg); and w...
Plastic ingestion by planktivorous fishes in the North Pacific Central Gyre
A significant amount of marine debris has accumulated in the North Pacific Central Gyre (NPCG). The effects on larger marine organisms have been documented through cases of entanglement and ingestion; however, little is known about the effects on lower trophic level marine organisms. This study is t...