Results 71 to 80 of about 1,135 (197)

Step by step: Floral structure and developmental changes to the formation of the gynostegium in Apocynaceae s.l.

open access: yesPlant Biology, EarlyView.
Developmental changes in Apocynaceae s.l. reveal progressive reductions in the corolla tube and epipetaly, together with increased staminal tube formation, highlighting shifts in floral integration associated with gynostegium evolution and organization.
D. M. Alves   +3 more
wiley   +1 more source

New records of Caulerpa andamanensis and C. minuta (Bryopsidales, Chlorophyta) from Okinoerabujima Island, Ryukyu Archipelago, Japan

open access: yesPhycological Research, EarlyView.
SUMMARY We identified 10 Caulerpa species collected from Okinoerabujima Island, Ryukyu Archipelago, Japan, using the tufA DNA barcode marker. Their tufA sequences showed 99.9–100% identity with tufA sequences available in GenBank. Among them, C. andamanensis and C.
Masahiro Suzuki   +5 more
wiley   +1 more source

Alkaline phosphatase activity in the subtropical ocean: insights from nutrient, dust and trace metal addition experiments

open access: yesFrontiers in Marine Science, 2014
Phosphorus is an essential nutrient for all life on earth. In the ocean, the most bioavailable form of phosphorus is inorganic phosphate, but in the extensive subtropical gyres, phosphate concentrations can be chronically low and limit primary ...
Claire eMahaffey   +4 more
doaj   +1 more source

Sedimentary biogeochemical provinces in the northern limit of the oxygen minimum zone from the northeastern Mexican Pacific

open access: yesSedimentology, EarlyView.
ABSTRACT Continental margins are reservoirs of materials of terrestrial and marine origin, and they play a crucial role in understanding the spatial and temporal variability of biogeochemical cycles. This, in turn, provides insights into the development and intensity of oxygen minimum zones (OMZs).
Alberto Sánchez
wiley   +1 more source

Autotrophic Dissolved Organic Phosphorus Uptake Stimulates Nitrogen Fixation in Subtropical Gyres

open access: yesGeophysical Research Letters
Dissolved organic phosphorus (DOP) has been identified as a key phosphorus source that supports primary production and microbial nitrogen (N2) fixation.
Yuxin Shen, Wei‐Lei Wang
doaj   +1 more source

Mechanisms of the QBO Influence on the Tropical Troposphere: Modulation by ENSO Conditions

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 13, 16 July 2026.
Abstract The Quasi‐Biennial Oscillation (QBO) is the dominant mode of tropical stratospheric variability that can influence tropospheric circulation and convection. El Niño‐Southern Oscillation (ENSO), which is the primary source of interannual variability in the tropical troposphere, can modulate both the QBO and its impact on the tropical troposphere.
Mario Rodrigo   +4 more
wiley   +1 more source

The satellite chlorophyll signature of Lagrangian eddy trapping varies regionally and seasonally within a subtropical gyre [PDF]

open access: yesOcean Science
Vertical motions of mesoscale ocean eddies modulate the resource environment, productivity, and phytoplankton biomass in the ocean's subtropical gyres. The horizontal circulations can trap or disperse the eddy-driven chlorophyll anomalies, which can be ...
A. E. Jones-Kellett   +2 more
doaj   +1 more source

Multidecadal Atlantic “Warming Hole” Heat Content Variations Are Caused by Ocean Heat Transport, Not by Surface Fluxes

open access: yesGeophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract The northern Atlantic south of Greenland and Iceland is the only part of the world which has cooled significantly since the 19th Century both in the atmosphere and ocean. The oceanic cooling is widely assumed to be a result of reduced ocean heat transport into this region.
Stefan Rahmstorf   +5 more
wiley   +1 more source

Resonant Forcing of Oceanic and Atmospheric Rossby Waves in (Sub)Harmonic Modes: Climate Impacts

open access: yesAtmosphere
Baroclinic wave resonance, particularly Rossby waves, has attracted great interest in ocean and atmospheric physics since the 1970s. Research on Rossby wave resonance covers a wide variety of phenomena that can be unified when focusing on quasi ...
Jean-Louis Pinault
doaj   +1 more source

Size-fractionated phytoplankton biomass and production in the tropical Atlantic

open access: yesScientia Marina, 2011
Two meridional transects were conducted in the tropical and subtropical Atlantic to describe (i) the spatial variability of total and size-fractionated (picophytoplankton and phytoplankton > 2 μm) chlorophyll a (chl a) concentration and primary ...
Enrique Moreno-Ostos   +6 more
doaj   +1 more source

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