L'oceano supporta una grande varietà di vita ed ecosistemi.

• Microbes, especially cyanobacteria and phytoplankton, dominate abundance and primary production and support most marine food webs.

• The diagram defines production as organic material made in excess of the producers’ respiratory consumption.

Note sull’adattamento (in inglese)

Name the sheet’s respiration-subtracted quantity net primary production. Nutrients support biomass synthesis; do not imply every protein contains phosphorus. High polar productivity requires seasonally available light, not nutrients alone.

• oceanservice.noaa.gov

• Minerals and vitamins allow glucose to be converted into growth and reproductive material.
• major nutrients include nitrate nitrogen, phosphate, silicate, and iron, with nitrogen often scarce.

Note sull’adattamento (in inglese)

Name the sheet’s respiration-subtracted quantity net primary production. Nutrients support biomass synthesis; do not imply every protein contains phosphorus. High polar productivity requires seasonally available light, not nutrients alone.

• oceanservice.noaa.gov

• Recycling supplies most production nutrients.
• bacterial decay releases nitrogen, phosphorus, and other nutrients from organic molecules in dead organisms.

Note sull’adattamento (in inglese)

Name the sheet’s respiration-subtracted quantity net primary production. Nutrients support biomass synthesis; do not imply every protein contains phosphorus. High polar productivity requires seasonally available light, not nutrients alone.

• oceanservice.noaa.gov

• A fraction of newly produced organic material sinks out of the illuminated surface, transporting nutrients downward.

• Circulation and upwelling affect productivity.
• polar and upwelling regions are especially productive when nutrients and sunlight are abundant.

Note sull’adattamento (in inglese)

Name the sheet’s respiration-subtracted quantity net primary production. Nutrients support biomass synthesis; do not imply every protein contains phosphorus. High polar productivity requires seasonally available light, not nutrients alone.

• oceanservice.noaa.gov

• Heterotrophs obtain their necessary matter and energy from autotrophic primary producers.
• Autotrophs produce organic matter, while heterotrophs obtain it from other organisms or their products.

• Chlorophyll absorbs sunlight, enabling carbon dioxide and water to be used to form energy-storing organic glucose.

• Environmental factors and the resident community together characterize an ocean ecosystem.

• Ocean life varies in abundance across time and space with oxygen, salinity, temperature, pH, light, nutrients, pressure, substrate, and water movement.
• highly populated regions contrast with extensive lower-abundance waters.

Note sull’adattamento (in inglese)

Lower abundance is not absence of life. Chemosynthesis supplies a food-web base without local sunlight, but chemical ecosystems may use photosynthetically produced oxygen or imported organic matter. Warm-water reef wording is scoped to shallow tropical reefs, not all coral habitats.

• oceanexplorer.noaa.gov

• Abundant marine life occurs where conditions and adaptations permit high productivity.

• Estuaries and kelp forests benefit from sunlight and nutrients delivered by rivers, currents, and upwelling.

• The sheet describes vents, submarine hot springs, and methane seeps as chemically powered ecosystems without dependence on sunlight or photosynthesis.
• the guide qualifies the latter absolute.

Note sull’adattamento (in inglese)

Lower abundance is not absence of life. Chemosynthesis supplies a food-web base without local sunlight, but chemical ecosystems may use photosynthetically produced oxygen or imported organic matter. Warm-water reef wording is scoped to shallow tropical reefs, not all coral habitats.

• oceanexplorer.noaa.gov

• In warm nutrient-poor waters, coral–zooxanthella symbiosis supports coral growth and the substrate underlying complex reef communities.

Note sull’adattamento (in inglese)

Lower abundance is not absence of life. Chemosynthesis supplies a food-web base without local sunlight, but chemical ecosystems may use photosynthetically produced oxygen or imported organic matter. Warm-water reef wording is scoped to shallow tropical reefs, not all coral habitats.

• oceanexplorer.noaa.gov

• Marine habitats and smaller habitats occur in vertical zones, expressed as shoreline bands and water-column layers.

• Environmental tolerances and adaptations partly explain organisms’ zonation.

• Intertidal occupancy reflects tidal air exposure, wave forces, predation, and substrate.

• Open-ocean organisms occupy zones associated with water density, pressure, and available light.

• Growth, migration, and death link ecosystems through a larger food web, allowing changes to propagate with potentially unpredictable effects.

• A niche combines physical and biological conditions for existence with the organism’s role, diet, and activities.

• Dynamic events such as upwelling change nutrient conditions and can favor a different set of organisms.

• Environmental diversity in the ocean supports many kinds of organisms and adaptations.
• this parent box is repeated in Parts 2 and 3.

• The diagram contrasts greater marine phylum diversity with life spanning microbes to blue whales.

Note sull’adattamento (in inglese)

Distinguish animal-phylum diversity from species richness. Retain ancient marine ancestry while leaving the exact origin setting unresolved. Keep fish as early, diverse vertebrates without an unsupported individual-abundance ranking. Do not treat seaweeds and tunicates as equivalent phylum ranks, repeat an exact land-only phylum count, or generalize that most non-insect animal species are marine. Attribute 97% to the CFD estimate of invertebrate species; green, red, and brown seaweeds are broad groups.

• www.nasa.gov

• The sheet places the first life in the ocean and connects it by evolution to modern phyla.
• its origin-location certainty is qualified in the guide.

Note sull’adattamento (in inglese)

Distinguish animal-phylum diversity from species richness. Retain ancient marine ancestry while leaving the exact origin setting unresolved. Keep fish as early, diverse vertebrates without an unsupported individual-abundance ranking. Do not treat seaweeds and tunicates as equivalent phylum ranks, repeat an exact land-only phylum count, or generalize that most non-insect animal species are marine. Attribute 97% to the CFD estimate of invertebrate species; green, red, and brown seaweeds are broad groups.

• www.nasa.gov

• Fish are presented as the earliest vertebrates and the most numerous vertebrates by species and individuals.

Note sull’adattamento (in inglese)

Distinguish animal-phylum diversity from species richness. Retain ancient marine ancestry while leaving the exact origin setting unresolved. Keep fish as early, diverse vertebrates without an unsupported individual-abundance ranking. Do not treat seaweeds and tunicates as equivalent phylum ranks, repeat an exact land-only phylum count, or generalize that most non-insect animal species are marine. Attribute 97% to the CFD estimate of invertebrate species; green, red, and brown seaweeds are broad groups.

• www.nasa.gov

• Some lineages colonized land.
• descendants of several groups later returned to the ocean, including mammals, reptiles, birds, and flowering plants.

Note sull’adattamento (in inglese)

Distinguish animal-phylum diversity from species richness. Retain ancient marine ancestry while leaving the exact origin setting unresolved. Keep fish as early, diverse vertebrates without an unsupported individual-abundance ranking. Do not treat seaweeds and tunicates as equivalent phylum ranks, repeat an exact land-only phylum count, or generalize that most non-insect animal species are marine. Attribute 97% to the CFD estimate of invertebrate species; green, red, and brown seaweeds are broad groups.

• www.nasa.gov

• The sheet emphasizes groups restricted to the sea, listing seaweeds, echinoderms, ctenophores, tunicates, most sponges and cnidarians, and claims only one terrestrial-only phylum.
• its mixed ranks and absolute counts need qualification.

Note sull’adattamento (in inglese)

Distinguish animal-phylum diversity from species richness. Retain ancient marine ancestry while leaving the exact origin setting unresolved. Keep fish as early, diverse vertebrates without an unsupported individual-abundance ranking. Do not treat seaweeds and tunicates as equivalent phylum ranks, repeat an exact land-only phylum count, or generalize that most non-insect animal species are marine. Attribute 97% to the CFD estimate of invertebrate species; green, red, and brown seaweeds are broad groups.

• www.nasa.gov

• Major invertebrate groups have marine members and many are exclusively marine.
• the sheet estimates at least 97% of animal species are invertebrates and broadly claims most non-insect invertebrate species are marine.

Note sull’adattamento (in inglese)

Distinguish animal-phylum diversity from species richness. Retain ancient marine ancestry while leaving the exact origin setting unresolved. Keep fish as early, diverse vertebrates without an unsupported individual-abundance ranking. Do not treat seaweeds and tunicates as equivalent phylum ranks, repeat an exact land-only phylum count, or generalize that most non-insect animal species are marine. Attribute 97% to the CFD estimate of invertebrate species; green, red, and brown seaweeds are broad groups.

• www.nasa.gov

• Seaweeds are multicellular photosynthetic eukaryotes lacking seeds and true roots or leaves, grouped as green, brown, and red.

Note sull’adattamento (in inglese)

Distinguish animal-phylum diversity from species richness. Retain ancient marine ancestry while leaving the exact origin setting unresolved. Keep fish as early, diverse vertebrates without an unsupported individual-abundance ranking. Do not treat seaweeds and tunicates as equivalent phylum ranks, repeat an exact land-only phylum count, or generalize that most non-insect animal species are marine. Attribute 97% to the CFD estimate of invertebrate species; green, red, and brown seaweeds are broad groups.

• www.nasa.gov

• The sheet describes small prokaryotic and eukaryotic microbes as dominating ocean organisms and biomass and forming the base of food webs.

Note sull’adattamento (in inglese)

Qualify microbe counts as cellular organisms and avoid saying every food web has the same base. Chemical producers fix carbon using chemical energy, not matter made from energy. Cyanobacteria pioneered oxygenic photosynthesis, not necessarily the first photosynthesis of any kind.

• oceanservice.noaa.gov

• Prokaryotic microbes are described as the most numerous ocean organisms.

Note sull’adattamento (in inglese)

Qualify microbe counts as cellular organisms and avoid saying every food web has the same base. Chemical producers fix carbon using chemical energy, not matter made from energy. Cyanobacteria pioneered oxygenic photosynthesis, not necessarily the first photosynthesis of any kind.

• oceanservice.noaa.gov

• Some bacteria and archaea synthesize organic food using chemical energy, exemplified by hydrogen sulfide at vents.

Note sull’adattamento (in inglese)

Qualify microbe counts as cellular organisms and avoid saying every food web has the same base. Chemical producers fix carbon using chemical energy, not matter made from energy. Cyanobacteria pioneered oxygenic photosynthesis, not necessarily the first photosynthesis of any kind.

• oceanservice.noaa.gov

• Most marine bacteria consume detritus and recycle nutrients.
• some bacteria in symbioses illuminate deep-sea fish and squid.

Note sull’adattamento (in inglese)

Qualify microbe counts as cellular organisms and avoid saying every food web has the same base. Chemical producers fix carbon using chemical energy, not matter made from energy. Cyanobacteria pioneered oxygenic photosynthesis, not necessarily the first photosynthesis of any kind.

• oceanservice.noaa.gov

• Cyanobacteria are associated with the rise of atmospheric oxygen and substantial continuing photosynthetic oxygen production.
• the sheet calls them the first photosynthetic organisms.

Note sull’adattamento (in inglese)

Qualify microbe counts as cellular organisms and avoid saying every food web has the same base. Chemical producers fix carbon using chemical energy, not matter made from energy. Cyanobacteria pioneered oxygenic photosynthesis, not necessarily the first photosynthesis of any kind.

• oceanservice.noaa.gov

• Marine eukaryotic microbes include diverse single-celled algae and fungi.

• Dinoflagellates include flagellated and food-ingesting organisms, red-tide and light-producing forms, and coral-associated zooxanthellae.
• The source uses red tides for some blooms.

Note sull’adattamento (in inglese)

Not all dinoflagellates photosynthesize, not all blooms are toxic, and nutrient pollution promotes some blooms rather than causing all of them. Diatoms fix carbon rather than create the element; distinguish siliceous walls from dissolved nutrients.

• www.aoml.noaa.gov

• Coastal pollution can increase some dinoflagellates and cause illness in people and marine life.

Note sull’adattamento (in inglese)

Not all dinoflagellates photosynthesize, not all blooms are toxic, and nutrient pollution promotes some blooms rather than causing all of them. Diatoms fix carbon rather than create the element; distinguish siliceous walls from dissolved nutrients.

• www.aoml.noaa.gov

• Diatom photosynthesis contributes strongly to organic carbon and oxygen production.
• their silica walls accumulate in seabed deposits.

Note sull’adattamento (in inglese)

Not all dinoflagellates photosynthesize, not all blooms are toxic, and nutrient pollution promotes some blooms rather than causing all of them. Diatoms fix carbon rather than create the element; distinguish siliceous walls from dissolved nutrients.

• www.aoml.noaa.gov

• Certain diatoms make domoic acid that accumulates in fish and shellfish and can kill mammalian consumers.

Note sull’adattamento (in inglese)

Not all dinoflagellates photosynthesize, not all blooms are toxic, and nutrient pollution promotes some blooms rather than causing all of them. Diatoms fix carbon rather than create the element; distinguish siliceous walls from dissolved nutrients.

• www.aoml.noaa.gov

• Marine fungi comprise many species, mostly microscopic decomposers.

• Ocean physical and biological properties permit larger animals than terrestrial environments.

• Water’s greater density than air provides support for greater animal mass.

• Food from very productive upwelling and polar regions can sustain especially large organisms.

• Marine organisms have many adaptations for survival in water.

• Light varies with position.
• adaptations place photosynthesizers near surface light and consumers near food.

Note sull’adattamento (in inglese)

Separate buoyancy, drag, and motility mechanisms; qualify wavelength penetration for clear water, with camouflage depending on available light.

• Plankton features include oil droplets, spines, cilia, flagella, and high surface area relative to volume.

Note sull’adattamento (in inglese)

Separate buoyancy, drag, and motility mechanisms; qualify wavelength penetration for clear water, with camouflage depending on available light.

• Water removes wavelengths differently with depth.
• blue and green penetrate farther than red, orange, and yellow, affecting camouflage.

Note sull’adattamento (in inglese)

Separate buoyancy, drag, and motility mechanisms; qualify wavelength penetration for clear water, with camouflage depending on available light.

• Red organisms can appear gray under water and become camouflaged.

Note sull’adattamento (in inglese)

Separate buoyancy, drag, and motility mechanisms; qualify wavelength penetration for clear water, with camouflage depending on available light.

• The intended connection is between sound propagation and communication, hunting, mate location, and environmental sensing.
• the printed faster-than-light claim is erroneous.

Note sull’adattamento (in inglese)

Correct the printed claim that sound travels faster than light. Sound can travel farther than useful light in water, but light is faster. Pistol-shrimp prey stunning is described as a claw-generated collapsing bubble and pressure pulse rather than vocal sound.

• www.fisheries.noaa.gov
• www.whoi.edu

• Examples include long-distance low-frequency whale calls, toothed-whale echolocation, and pistol-shrimp pulses that stun prey.

Note sull’adattamento (in inglese)

Correct the printed claim that sound travels faster than light. Sound can travel farther than useful light in water, but light is faster. Pistol-shrimp prey stunning is described as a claw-generated collapsing bubble and pressure pulse rather than vocal sound.

• www.fisheries.noaa.gov
• www.whoi.edu

• Some organisms have adaptations for deep residence or diving.

• Mammal diving adaptations include breath holding, slower heart rate, redirected circulation, and oxygen storage.
• bioluminescence serves prey capture, mating, and escape.

• Marine organisms regulate water and solutes in a salty environment.

Note sull’adattamento (in inglese)

Scope drinking and salt excretion to many marine bony fish. Sharks retain urea and other solutes; urea is an organic osmolyte, not a salt ion.

• pubmed.ncbi.nlm.nih.gov

• Dilute-bodied fish lose water, drink seawater, and excrete salts.
• other strategies balance body solutes with seawater, exemplified by shark urea regulation.

Note sull’adattamento (in inglese)

Scope drinking and salt excretion to many marine bony fish. Sharks retain urea and other solutes; urea is an organic osmolyte, not a salt ion.

• pubmed.ncbi.nlm.nih.gov

• Marine organisms occupy particular ecosystems and are adapted to their pH and temperature conditions, described as relatively stable in the sheet.

Note sull’adattamento (in inglese)

Use organism tolerance ranges rather than a universally stable ocean. Lower carbonate availability affects many calcifiers, with dissolution under corrosive conditions. Bleaching can cause death but can also be reversed; algae loss does not mean the coral is already dead.

• oceanservice.noaa.gov

• Human-related changes in temperature and pH can alter survival and biodiversity, including bleaching and inhibited shell formation.

Note sull’adattamento (in inglese)

Use organism tolerance ranges rather than a universally stable ocean. Lower carbonate availability affects many calcifiers, with dissolution under corrosive conditions. Bleaching can cause death but can also be reversed; algae loss does not mean the coral is already dead.

• oceanservice.noaa.gov

• Calcium carbonate structures depend on available carbonate ions.
• decreasing pH reduces carbonate availability and can promote shell dissolution and thinning.

Note sull’adattamento (in inglese)

Use organism tolerance ranges rather than a universally stable ocean. Lower carbonate availability affects many calcifiers, with dissolution under corrosive conditions. Bleaching can cause death but can also be reversed; algae loss does not mean the coral is already dead.

• oceanservice.noaa.gov

• Warming can cause loss of coral symbiotic algae, bleaching, and mortality.
• the guide distinguishes bleaching from inevitable death.

Note sull’adattamento (in inglese)

Use organism tolerance ranges rather than a universally stable ocean. Lower carbonate availability affects many calcifiers, with dissolution under corrosive conditions. Bleaching can cause death but can also be reversed; algae loss does not mean the coral is already dead.

The printed P6 C36 does not exist. P6 D14 covers warming, coral symbiosis and bleaching.

• oceanservice.noaa.gov

• Marine adaptations support obtaining food, catching prey, and escaping predators.

• Feeding adaptations address patchy food: locally abundant coasts and upwelling areas contrast with extensive food-poor open and deep waters.

• Examples include migration, energy reserves, enlarged mouths and stomachs, and streamlined fast pursuit of prey.
• Named feeding examples include chambered nautili, deep-sea hatchetfish, gulper eels and gray whales.

• Food acquisition in water must account for suspended material, fluid friction, and buoyancy.

• The sheet contrasts suspension capture by cnidarians and crinoids, filtration by baleen, clam siphons and barnacle limbs, and pursuit or grasping by strong fish and cephalopods.

• Symbiotic partnerships can help organisms acquire energy.

• Corals receive photosynthetic sugars and oxygen while algae receive carbon dioxide, nutrients and shelter.
• other mutualisms include clownfish–anemone and cleaner-fish relationships.

• Marine organisms exhibit varied life cycles and reproductive strategies.

• Planktonic, nektonic and benthic phases can alternate during development, changing access to food and space and reducing juvenile competition or predation.

• Bottom-dwelling adult crabs and sessile adult mollusks can have drifting planktonic larval stages.

• Marine reproduction ranges from asexual to sexual modes, with some organisms alternating modes.

Note sull’adattamento (in inglese)

Distinguish alternation of sexual/asexual reproductive stages in jellyfish from the haploid/diploid generations of many algae. Preserve meiosis, spores, gametophytes, gametes, fertilization, and contrasting kelp generation sizes.

• ocean.si.edu

• Asexual examples include anemone fission and sponge budding.
• favorable conditions permit rapid clonal growth in microbes and algae.

• The sheet connects alternating reproductive phases in jellyfish and algae.
• it details diploid sporophyte meiosis to haploid spores, gametophytes and gametes, and fertilization restoring diploidy, with similar-looking algal generations contrasted with macroscopic kelp sporophytes and microscopic gametophytes.

Note sull’adattamento (in inglese)

Distinguish alternation of sexual/asexual reproductive stages in jellyfish from the haploid/diploid generations of many algae. Preserve meiosis, spores, gametophytes, gametes, fertilization, and contrasting kelp generation sizes.

• ocean.si.edu

• Sexual systems include separate sexes, sex change, and simultaneous male and female functions.
• age, population, and environmental conditions can influence sex change.
• The source names hermaphroditism and gives brittle stars as an example.

Note sull’adattamento (in inglese)

Preserve density, encounter-rate and competition pathways without a deterministic rule. Retain sex change, multiple partners, pairing and male attachment in some deep-sea anglerfish. Omit the unsupported mahi-mahi monogamy example and avoid conflating parasitic isopods with sexual attachment. Name hermaphroditism; retain reproductive diversity without assigning one reproductive mode to brittle stars as a whole. The unscoped brittle-star example is deliberately not reinstated.

• ocean.si.edu

• Population density relates to mate competition and the probability of finding partners.

Note sull’adattamento (in inglese)

Preserve density, encounter-rate and competition pathways without a deterministic rule. Retain sex change, multiple partners, pairing and male attachment in some deep-sea anglerfish. Omit the unsupported mahi-mahi monogamy example and avoid conflating parasitic isopods with sexual attachment.

• ocean.si.edu

• The diagram connects high density with sex change or multiple partners and low density with pairing or attachment, using examples whose species-level generalizations require qualification.
• Named examples include bluehead wrasse sex change and squid multiple mating.

Note sull’adattamento (in inglese)

Preserve density, encounter-rate and competition pathways without a deterministic rule. Retain sex change, multiple partners, pairing and male attachment in some deep-sea anglerfish. Omit the unsupported mahi-mahi monogamy example and avoid conflating parasitic isopods with sexual attachment. Restore bluehead wrasse sex change and squid multiple mating as species-specific examples.

• ocean.si.edu
• pubmed.ncbi.nlm.nih.gov

• Marine organisms have strategies to locate partners and improve fertilization success across the ocean.

Note sull’adattamento (in inglese)

Keep environmental synchronization, large gamete output and luminous mate signals. Distinguish brooding, egg defense, and intensive care; many offspring and dispersal do not guarantee high individual survival.

• Reproductive timing responds to day length, tides and seasonal currents.
• large gamete output aids external fertilization and some pelagic or deep organisms use luminous signals to find mates.
• The source names elephant seals, butterflyfish, squid and pelagic octopuses in its reproductive timing and signalling examples.

Note sull’adattamento (in inglese)

Keep environmental synchronization, large gamete output and luminous mate signals. Distinguish brooding, egg defense, and intensive care; many offspring and dispersal do not guarantee high individual survival. Keep synchronization, environmental cues, sea urchins and grunion. Do not reinstate the unspecified elephant-seal/butterflyfish timing, squid external-fertilization or pelagic-octopus mate-light claims without species-specific evidence; the mechanisms remain covered. This is an explicit example exclusion, not a claim that the original examples were verified.

• Strategies for offspring survival and dispersal involve differing parental care and energetic investment.

Note sull’adattamento (in inglese)

Keep environmental synchronization, large gamete output and luminous mate signals. Distinguish brooding, egg defense, and intensive care; many offspring and dispersal do not guarantee high individual survival.

• The diagram contrasts many broadcast gametes and little care with brooding or egg defense and intensive mammal or seabird care, linking these to dispersal and survival.
• Surfperch is a source example of reproductive investment.

Note sull’adattamento (in inglese)

Keep environmental synchronization, large gamete output and luminous mate signals. Distinguish brooding, egg defense, and intensive care; many offspring and dispersal do not guarantee high individual survival. Restore surfperch live-bearing as a contrasting reproductive investment.

• myodfw.com