Hello Students!! Hope you are doing well? If you are curious about learning about the science behind our environment, you would definitely like this blog based on ocean or marine science. Excited to explore marine life, the ecology, the depth and extent of the oceanic water, physical features, movements, composition, and the interaction between the atmosphere and the oceans. This blog will explain the regions that make up the continental margins and the difference between the biota of the pelagic and benthic zone. So before we explore this topic, we will look at some other ways to categorize the ocean environments.
The benthic zone refers to the lowest ecological zone in an ocean, which typically includes the sediments at the seafloor. These sediments are the crucial key factors that provide nutrients and food for the organisms that survive in the benthic zones.
Whereas, the animals that live on the seafloor are called benthos. Most of these ocean animals lack a backbone and are called invertebrates.
Benthos includes rockfish, thorny heads, bluefin tuna, sea cucumbers, squat lobsters (galatheids), flatfish, rattails, brittle stars, crabs, sea pens, corals, sea stars, octopus, anemones, and bacterial mats (near seeps).
The benthic zone includes submerged plants and animals like crabs, prawns, fishes, and lobsters that will remain on the bottom of the marine layer. The benthic invertebrates typically include sea stars, sea anemones, corals, worms, sea urchins, sponges, bivalves, crabs, and many more.
Let's discuss some of the significant differences between the Biota of the Benthic and Pelagic zone:
The pelagic zone is the region of a lake, river, or ocean that is not connected with the shore or the bottom. The pelagic zone inhabitants do not contact the bottom of the coast throughout their lives. The pelagic zone is deficient in nutrients, and the giant fishes find their food by swimming long distances or drifting with currents and feeding on nutrient-deficient organisms.
Although this zone may emerge as a barren area, the pelagic zone importance is immense in maintaining the marine ecosystems. Microscopic benthic organisms usually live in the pelagic zones and act as food sources for bottom-feeding organisms and animals. The microorganisms living in the pelagic zone locate where there is the availability of food and find a partner to reproduce. In the pelagic zones, biomass is lower than the coastal water body per unit volume, but many organisms live here in such conditions.
Pelagic zones can be categorized into five major sections:
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