Plants, algae, and
other photosynthesizers consume CO2, but much of it is eventually returned to the atmosphere when the organisms die.
The cause of this dry season «greening up» has been debated; many scientists have pinned it on extra sunlight or on drought, which they say could make plants more
efficient photosynthesizers.
When these minute silicon -
shelled photosynthesizers die, their corpses can overwhelm natural systems and sink to the bottom, as proved by a scientific research cruise in 2004.
These chloroplasts — diminished descendants of the
first photosynthesizers, cyanobacteria — use incoming sunlight to split water molecules and then knit together the energy - rich carbon and hydrogen compounds found in everything from food to fossil fuels.
More leaf veins made the plants
better photosynthesizers, the duo reports, enabling angiosperms to outgrow their competition.
I'd guess that means even plankton proxies would have the same issue as tree rings —
photosynthesizers for primary production are mostly toward the poles, maybe less influenced by such dust.
In the first comprehensive biogeochemical model of this «Canfield Ocean,» Johnston et al. (2) in a recent issue of PNAS present a stunningly different take on those
early photosynthesizers — one in which the upper, light - containing layers indeed drove biological production but without the expected concomitant release of oxygen.
Today's ocean models typically take an «either / or» approach, grouping plankton as either
photosynthesizers or consumers of prey.
Typical ocean models that incorporate plankton often group them in 10 general size classes, each of which fall into a «two - guild» structure, as either
photosynthesizers, or consumers of prey.
Indeed, corals are important in this regard, as they are
both photosynthesizers and plankton eaters.