Results 51 to 60 of about 2,044 (183)

Feeding strategies and resource partitioning ­mitigate the effects of oligotrophy for marine cave mysids [PDF]

open access: yesMarine Ecology Progress Series, 2011
We investigated how large populations of several mysid species can coexist in oligo - trophic underwater marine caves and their relationships in the marine cave food web using car- bon and nitrogen stable isotopes. Isotopic signatures indicate food partitioning among the 5 spe- cies of cave-dwelling mysids from the northwest Mediterranean Sea we ...
Rastorgueff, P   +3 more
openaire   +3 more sources

Nano-Sized and Filterable Bacteria and Archaea: Biodiversity and Function

open access: yesFrontiers in Microbiology, 2018
Nano-sized and filterable microorganisms are thought to represent the smallest living organisms on earth and are characterized by their small size (50–400 nm) and their ability to physically pass through <0.45 μm pore size filters.
Lydia-Ann J. Ghuneim   +3 more
doaj   +1 more source

Variability of rRNA operon copy number and growth rate dynamics of Bacillus isolated from an extremely oligotrophic aquatic ecosystem

open access: yesFrontiers in Microbiology, 2016
The ribosomal RNA (rrn) operon is a key suite of genes related to the production of protein synthesis machinery and thus to bacterial growth physiology.
Jorge Antonio Valdivia-Anistro   +8 more
doaj   +1 more source

OUTPACE long duration stations: physical variability, context of biogeochemical sampling, and evaluation of sampling strategy [PDF]

open access: yesBiogeosciences, 2018
Research cruises to quantify biogeochemical fluxes in the ocean require taking measurements at stations lasting at least several days. A popular experimental design is the quasi-Lagrangian drifter, often mounted with in situ incubations or sediment ...
A. de Verneil   +7 more
doaj   +1 more source

Integrating environmental DNA, diving surveys and DNA barcoding to track endangered twaite shad (Alosa fallax) spawning sites

open access: yesJournal of Fish Biology, Volume 109, Issue 2, Page 1198-1209, August 2026.
Abstract The twaite shad (A. fallax), an anadromous fish species belonging to the Clupeidae family, has experienced population declines throughout Europe. This decline is attributable to a range of anthropogenic pressures, including migration barriers, environmental pollution, habitat degradation, predation by invasive species and unsustainable fishing
Alessia Ardenghi   +10 more
wiley   +1 more source

Seasonal variation of limnological features and trophic state index of two oligotrophic reservoirs of southeast Brazil

open access: yesBrazilian Journal of Biology
Limnological features of two reservoirs were studied in dry (August 2013) and rainy (January 2014) periods to evaluate the water quality that supply the city of Guarulhos, southeast Brazil.
S. A. Oliveira, C. E. M. Bicudo
doaj   +1 more source

Species assemblages of zooplanktonic crustaceans in mountain shallow ponds of Chile (Parque Cañi)

open access: yesZoologia (Curitiba), 2010
Even though the Chilean lakes are characterized by their oligotrophy, a transition from oligotrophy to mesotrophy, due human intervention, has been reported in some lakes.
Patricio De los Ríos, Guido Roa
doaj   +1 more source

Divergent plant and microbial community change in response to coastal salinization and sea level rise

open access: yesEcosphere, Volume 17, Issue 7, July 2026.
Abstract Diverging community responses of plants and microbes to global change have the potential to disrupt ecosystem function and resiliency. Saltwater intrusion and sea level rise (SWISLR) threaten coastal ecosystems and are associated with multiple stressors—salinization, alkalinization, and inundation.
Aeran O. Coughlin   +4 more
wiley   +1 more source

Bacterial dynamics during the transition from spring bloom to oligotrophy in the Northwestern Mediterranean Sea

open access: yes, 2001
International audienceThe variability in microbial communities (abundance and biomass), bacterial production and ectoaminopeptidase activity, particulate and dissolved organic carbon (POC, DOC), and particulate and dissolved lipids was examined in spring
Vidussi, Francesca   +4 more
core   +5 more sources

Regulation of Diel Size Spectrum Variation by Dissolved Inorganic Nutrients in Starved Mixotroph Mesodinium rubrum

open access: yesJournal of Marine Science and Engineering
The obligate mixotroph Mesodinium rubrum significantly impacts coastal ecosystems, yet its population control in oligotrophic waters remains unclear.
Yi Wu   +6 more
doaj   +1 more source

Home - About - Disclaimer - Privacy