Results 21 to 30 of about 4,142 (205)

The Mediterranean deep-sea fauna: historical evolution, bathymetric variations and geographical changes [PDF]

, 2004
The deep-water fauna of the Mediterranean is characterized by an absence of distinctive characteristics and by a relative impoverishment. Both are a result of events after the Messinian salinity crisis (Late Miocene).
Emig, Christian, Geistdoerfer, Patrick
core   +6 more sources

Homeostasis and non‐linear shift in the stoichiometry of P‐limited planktonic communities

Ecosphere, 2020
Planktonic communities are naturally subjected to episodic nutrient enrichments that may stress or redress the imbalances in limiting nutrients. Human‐enhanced atmospheric nitrogen deposition has caused profound N:P imbalance in many remote oligotrophic ...
Pau Giménez‐Grau, Marisol Felip, Aitziber Zufiaurre, Sergi Pla‐Rabès, Lluís Camarero, Jordi Catalan   +5 more
doaj   +1 more source

Predominance of Cand. Patescibacteria in Groundwater Is Caused by Their Preferential Mobilization From Soils and Flourishing Under Oligotrophic Conditions

Frontiers in Microbiology, 2019
Despite the widely observed predominance of Cand. Patescibacteria in subsurface communities, their input source and ecophysiology are poorly understood.
Martina Herrmann, Martina Herrmann, Carl-Eric Wegner, Martin Taubert, Patricia Geesink, Katharina Lehmann, Lijuan Yan, Lijuan Yan, Robert Lehmann, Kai Uwe Totsche, Kirsten Küsel, Kirsten Küsel   +11 more
doaj   +1 more source

Feeding strategy and dietary preference shape the microbiome of epipelagic copepods in a warm nutrient‐impoverished ecosystem

Environmental DNA, 2023
Copepods provide a rich organic microenvironment allowing the settlement and proliferation of microorganisms, forming dynamic microbial hotspots in the oceans.
Ximena Velasquez, Arseniy R. Morov, Natalia Belkin, Tuba Terbiyik Kurt, Maxim Rubin‐Blum, Dan Tchernov, Dalit Meron, Tamar Guy‐Haim   +7 more
doaj   +1 more source

Did silicon aid in the establishment of the first bacterium? [PDF]

, 2003
Silicic acid increased numbers of both aerobic and facultatively anaerobic bacteria in ultrapure water incubated under strict oligotrophic conditions; soil extracts acted as the bacterial inoculum. The results are discussed in relation to the possibility
Al-Wajeeh, K., Narlikar, J.V., Wainwright, M., Wickramasinghe, N.C.   +3 more
core   +1 more source

Macrophytes assemblages in mountain lakes of Huerquehue National Park (39ºS, Araucanía Region, Chile) [PDF]

, 2012
The lakes studied (Tinquilco, Verde, Toro, Chico) are located in the Huerquehue National Park (39°08’S, 71°40’W), Chile. An inventory of the aquatic and riparian species was performed between December 2005 and March 2006. A null model analysis was done

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Microcrustacean assemblages composition and environmental variables in lakes and ponds of the Andean region - South of Chile (37-39° S) Composição de comunidades de microcustáceos e variáveis ambientais em lagos e lagoas da região andina - sul do Chile (37-39° S)

Brazilian Journal of Biology, 2011
The zooplankton assemblages in Chilean Patagonian lakes are characterised mainly by their low biodiversity and high predominance of calanoids copepods, a pattern that has been studied for large and deep lakes between 38-51° S, and shallow ponds at 51° S.
P. De los Ríos-Escalante, E. Hauenstein, M. Romero-Mieres   +2 more
doaj   +1 more source

Types and Distribution of Bioactive Polyunsaturated Aldehydes in a Gradient from Mesotrophic to Oligotrophic Waters in the Alborán Sea (Western Mediterranean)

Marine Drugs, 2020
Polyunsaturated aldehydes (PUAs) are bioactive molecules suggested as chemical defenses and infochemicals. In marine coastal habitats, diatoms reach high PUA production levels during bloom episodes.
Ana Bartual, María Hernanz-Torrijos, Iria Sala, María J. Ortega, Cristina González-García, Marina Bolado-Penagos, Angel López-Urrutia, Leonardo Romero-Martínez, Luís M. Lubián, Miguel Bruno, Fidel Echevarría, Carlos M. García   +11 more
doaj   +1 more source

In situ cell division and mortality rates of SAR11, SAR86, Bacteroidetes, and Aurantivirga during phytoplankton blooms reveal differences in population controls

mSystems, 2023
Net growth of microbial populations, that is, changes in abundances over time, can be studied using 16S rRNA fluorescence in situ hybridization (FISH). However, this approach does not differentiate between mortality and cell division rates.
Jan D. Brüwer, Luis H. Orellana, Chandni Sidhu, Helena C. L. Klip, Cédric L. Meunier, Maarten Boersma, Karen H. Wiltshire, Rudolf Amann, Bernhard M. Fuchs   +8 more
doaj   +1 more source

Factores reguladores en ensambles de crustáceos zooplanctónicos en lagos de montaña del norte de la Patagonia chilena (38-41°S): una comparación con sus contrapartes de Bulgaria (42°N) [PDF]

, 2012
Chilean Patagonia has protected mountainous areas with evergreen native forests; in which the lakes and rivers, of volcanic or glacial origin, are oligotrophic.

core   +1 more source