| The depth is recognized as that of the lower photic zone, the reproductive depth for planktonic foraminifera. |
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| Seasonal highs that pushed this euxinic layer into the photic zone would then lead to the greatly increased preservation and the TOC maxima. |
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| Stromatolites were built by photosynthesizing organisms occupying shallow-water environments within the photic zone. |
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| Concentrations of phosphorus and nitrogen are generally low in the photic zone because they are rapidly taken up by marine organisms. |
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| Figure 5 illustrates changes in values in the photic zone of Robert-Bourassa, Opinaca and Caniapiscau reservoirs during the ice-free season. |
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| Macroalgae benefit from this relationship because fertile drift plants are retained in the photic zone where they continue to contribute to the gene pool. |
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| The illuminated region above it is called the photic zone, within which are distinguished the euphotic and disphotic zones. |
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| The bottommost, or aphotic, zone is the region of perpetual darkness that lies beneath the photic zone and includes most of the ocean waters. |
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| Twilight Zone: The area of the ocean below the sunlit photic zone and above the zone of total darkness. |
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| In contrast, the many shale layers seem to be poor in macrofossils largely because they were deposited at depth below the photic zone as indicated by benthic foraminifera. |
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| The relatively moderate brachiopod generic diversity is consistent with a moderately restrictive environment, including one below the photic zone. |
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| On many sediments in the photic zone, however, the only photosynthetic organisms are microscopic benthic diatoms. |
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| Single-celled or multicelled plankton with photosynthetic pigments are the producers of the photic zone in the pelagic environment. |
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| The condition of this environment is shallow, with medium to low energy and presence in the photic zone below the fair-weather wave base. |
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| The behaviour of Kogiids remains largely unknown, but, due to their small lungs, they are thought to hunt in the photic zone. |
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| Day length and insolation intensity also controls the extent of the photic zone. |
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| Here we report on the use of imaging flow cytometry to analyze vertical profiles through the photic zone. |
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| Taylor already had a SID that could go deeper than the photic zone to study metabolic processes of bacteria there. |
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| The intertidal zone and the photic zone in the oceans are relatively familiar habitats. |
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| Maerl beds occur in the photic zone, and can be found to around 30 m depth in the British Isles and up to 120 m deep in the Mediterranean. |
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| Extending from the bottom of the photic zone down to the seabed is the aphotic zone, a region of perpetual darkness. |
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| However, due to its capacity for photosynthesis, the photic zone has the greatest biodiversity and biomass of all oceanic zones. |
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| Life forms which inhabit the aphotic zone are often capable of movement upwards through the water column into the photic zone for feeding. |
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| It is also referred to as the surface waters or the sunlit zone, and includes the photic zone. |
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| Secchi disk readings were also taken to ensure that the mesocosm depths were consistently in the photic zone. |
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| The limestones of the Central Baltoscandian confacies belt are shallow-water deposits formed within the photic zone. |
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| The surface zone contains ocean water that is in contact with the atmosphere and within the photic zone. |
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| A characterization of the fish assemblage of deep photic zone rock outcrops in the Anacapa Passage, Southern California, 1995 to 2004, with evidence of a regime shift. |
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| The photic zone can be subdivided into two different vertical regions. |
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| The pelagic part of the photic zone is known as the epipelagic. |
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| Its origin lies in activities within the productive photic zone. |
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| These species of fish tend to stay below the photic zone usually at depths greater than 300 m during the day and migrate up near the surface at night. |
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| In marine biology, the sublittoral refers to the areas where sunlight reaches the ocean floor, that is, where the water is never so deep as to take it out of the photic zone. |
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| The photic zone extends to approximately the base of the wall. |
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| The photic zone has sufficient light for phytoplankton to photosynthese. |
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