Results 81 to 90 of about 8,714 (205)

Evolutionary Routes to Modern Metabolic Pathways

Macromol
Metabolism, the network of biochemical reactions that powers life, arose under conditions radically different from those on Earth today. Investigating its origins reveals how initially simple chemical processes gradually integrated nucleic acid and then ...
Alberto Vázquez-Salazar, Israel Muñoz-Velasco   +1 more
doaj   +1 more source

Flow variability and macroinvertebrates jointly regulate stream periphyton and metabolism: Insights from experimental stream mesocosms

Limnology and Oceanography, Volume 71, Issue 1, January 2026.
Abstract Climate change profoundly alters riverine flow regimes and community composition, affecting key ecosystem functions. We used an experimental mesocosm approach to examine how gradual flow velocity reduction (Experiment 1) and flushing events (Experiment 2) influence periphyton community composition and metabolism, with and without a ...
Flavia Tromboni, Carolina Jativa, Carina Seitz, Alain Maasri, Silvia Mohr, Hans‐Peter Grossart, Giulia Grandi, Enrico Bertuzzo, Sonja C. Jähnig, Clara Mendoza‐Lera, Andreas Lorke, Marco Cantonati, Anna Lupon, Susana Bernal   +13 more
wiley   +1 more source

Sensitivity of freshwater periphytic diatoms to agricultural herbicides [PDF]

, 2009
The biomonitoring of pesticide pollution in streams and rivers using algae such as diatoms remains difficult. The responses of diatomcommunities to toxic stress in streamwater are disturbed by the variations of environmental parameters.
Coste, Michel, Debenest, Timothée, Delmas, François, Madigou, C., Mazzella, N., Pinelli, Eric, Silvestre, Jérôme   +6 more
core   +4 more sources

High‐density sampling reveals biologically and tidally driven spatiotemporal variation in carbon dioxide fluxes in a tropical lagoon

Limnology and Oceanography, Volume 71, Issue 1, January 2026.
Abstract Lagoons are recognized as significant CO2 sources in the global carbon cycle. However, the lack of comprehensive measurements capturing simultaneous spatiotemporal variations in partial pressure of CO2 (pCO2) limits our understanding of mechanisms driving CO2 dynamics in lagoons.
Fei‐Ling Yuan, Wei‐Jen Huang, Kai‐Jung Kao, Veran Weerathunga, Wen‐Chen Chou   +4 more
wiley   +1 more source

Comparison of ecosystem processes in a woodland and prairie pond with different hydroperiods [PDF]

, 2017
Shallow lakes and ponds constitute a significant number of water bodies worldwide. Many are heterotrophic, indicating that they are likely net contributors to global carbon cycling. Climate change is likely to have important impacts on these waterbodies.
Ensley-Field, Mira W., Glasenapp, Matthew R., Goodbar, Ian A., Harman, J. Douglas, Hornbach, Daniel J., Hove, Mark C., Huber, Benjamin D., Kangas, Emily A., Liu, Kira X., Stark-Ragsdale, Molly, Tran, Long K.   +10 more
core   +2 more sources

Experimental evidence for the “greening” of proglacial streams: Biofilm responses to a transition from glacial to groundwater sources

Limnology and Oceanography, Volume 71, Issue 1, January 2026.
Abstract Climate change‐induced glacier retreat leads to the reorganization of fluvial landscapes in proglacial terrains and transitions between streams fed predominantly by glacial meltwater and groundwater. To explore the effects of such ecosystem transitions on benthic biofilm communities, we gradually mixed water from a glacier‐fed stream (GFS) and
Hannes Peter, Jade Brandani, Tyler J. Kohler, Grégoire Michoud, Nicola Deluigi, Tom J. Battin   +5 more
wiley   +1 more source

The Effects of Tidal Forcing on Nutrient Fluxes in the Tidal, Freshwater James River Estuary, VA [PDF]

, 2016
A 12-month study (January to December 2015) focused on the effects of tidal forcing on nutrient fluxes in the tidal, freshwater segment of the James River Estuary (JRE). Discrete sampling of nutrient chemistry and continuous monitoring of tidal discharge
Devore, Dana L
core   +1 more source

Extreme summer storm elicits shifts in biogeochemistry, primary productivity, and plankton community structure in a large‐scale lake enclosure experiment

Limnology and Oceanography Letters, Volume 11, Issue 1, January 2026.
Abstract Climate change increases the magnitude and frequency of extreme weather events. This includes severe summer storms altering lake physical structure, biodiversity and ecosystem processes. However, insights into lake responses to extreme storms and the underlying mechanisms primarily rest on unreplicated and observational case studies, without ...
Hans‐Peter Grossart, Thomas Hornick, Stella A. Berger, Jens C. Nejstgaard, Michael T. Monaghan, Takeshi Miki, Darren P. Giling, Geza B. Selmeczy, Judit Padisak, Jörg Sareyka, Peter Kasprzak, Christian Wurzbacher, Georgiy Kirillin, Christof Engelhardt, Mark O. Gessner   +14 more
wiley   +1 more source

Comparative biochemistry of CO2 fixation and the evolution of autotrophy [PDF]

, 2010
Carbon dioxide fixation is a polyphyletic trait that has evolved in widely separated prokaryotic branches. The three principal CO2-assimilation pathways are (i) the reductive pentose-phosphate cycle, i. e.
Ana María Velasco, Antonio Lazcano, Arturo Becerra, Juli G. Peretó   +3 more
core   +2 more sources

The evolution of autotrophy in relation to phosphorus requirement [PDF]

Journal of Experimental Botany, 2013
The evolution of autotrophy is considered in relation to the availability of phosphorus (P), the ultimate elemental resource limiting biological productivity through Earth's history. Work on microbes and plants is emphasized, dealing in turn with the main uses for P in cells, namely nucleic acids, phospholipids, and water-soluble low molecular mass ...
openaire   +3 more sources