Marine Microbes
15 views | +0 today
Your new post is loading...
Your new post is loading...
Scooped by Christopher Smyth!

Frontiers | Benthic protists and fungi of Mediterranean deep hypsersaline anoxic basin redoxcline sediments | Extreme Microbiology

Some of the most extreme marine habitats known are the Mediterranean Deep Hypersaline Anoxic Basins (DHABs; water depth ~3500m). Brines of DHABs are nearly saturated with salt, leading many to suspect they are uninhabitable for eukaryotes. While diverse bacterial and protistan communities are reported from some DHAB water-column haloclines and brines, the existence and activity of benthic DHAB protists have rarely been explored. Here, we report findings regarding protists and fungi recovered from sediments of three DHAB (Discovery, Urania, L’Atalante) haloclines, and compare these to communities from sediments underlying normoxic waters of typical Mediterranean salinity. Halocline sediments, where the redoxcline impinges the seafloor, were studied from all three DHABs. Microscopic cell counts suggested that halocline sediments supported denser protist populations than those in adjacent control sediments. Pyrosequencing analysis based on ribosomal RNA detected eukaryotic ribotypes in the halocline sediments from each of the three DHABs, most of which were fungi. Sequences affiliated with Ustilaginomycotina Basidiomycota were the most abundant eukaryotic signatures detected. Benthic communities in these DHABs appeared to differ, as expected, due to differing brine chemistries. Microscopy indicated that only a low proportion of protists appeared to bear associated putative symbionts. In a considerable number of cases, when prokaryotes were associated with a protist, DAPI staining did not reveal presence of any nuclei, suggesting that at least some protists were carcasses inhabited by prokaryotic scavengers.
No comment yet.
Rescooped by Christopher Smyth from Soggy Science!

Crabs killing Northeast saltmarshes, study confirms

Crabs killing Northeast saltmarshes, study confirms | Marine Microbes |
Ample new evidence has been provided that the reason coastal saltmarshes are dying from Long Island to Cape Cod is that hungry crabs, left unchecked by a lack of predators, are eating the cordgrass. Long-held beliefs that physical forces, rather than disrupted food webs, are killing the marshes just aren't true, experts say. It's a problem that, properly understood, must now be managed.

Via Grant W. Graves
No comment yet.
Scooped by Christopher Smyth!

Frontiers | Think laterally: horizontal gene transfer from symbiotic microbes may extend the phenotype of marine sessile hosts | Aquatic Microbiology

Since the origin of the animal kingdom, marine animals have lived in association with viruses, prokaryotes and unicellular eukaryotes, often as symbionts. This long and continuous interaction has p...
No comment yet.
Rescooped by Christopher Smyth from Coastal Restoration!

Welcome to Coastal Restoration

Welcome to Coastal Restoration | Marine Microbes |

Welcome to my curation site for all things coastal management-related.


Here you will find an array of stories, media, factoids, and updates on current events spanning a range of coastal and marine issues.  While I am interested in a great many things, most of these entries center upon our work to restore coastal ecosystems and improve the management of these incredible, dynamic parts of our planet.


In particular, you will find postings here that reflect my deep, continuing interest in:


- coastal riparian restoration

- coastal wetland restoration

- subtidal reef restoration

- improved Coastal Zone Managment poilcies and proceedures 

- coastal agriculture/food systems

- sustainable fisheries management

- working ports and harbors

- vibrant ocean economies

- marine ecology

- natural history

- coastal energy production

- oil spills

- water quality and ecotoxicology in the coastal zone

- historic persepctives on our coast our our relationship to our world ocean




If you find my posts here of interest, you might also be interested in some of my other research, teaching, and updates elsewhere via my:


- iTunesU Coastal Management podcasts (lectures and field videos):

- iTunesU Restoration Ecology podcasts (lectures and field videos):

- iTunesU Conservation Biology podcasts (lectures and field videos):

- Vimeo page:

- lab's home page:

- RestoringNOLA twiter feed (emphasizing Coastal Management in California and Louisiana):



Thanks for visiting.  Please enjoy and let me know if I can answer any questions or be of help.

Via PIRatE Lab
No comment yet.