Marine plants live in the euphotic zone of the ocean, because they need sunlight to create food through photosynthesis. Hypoxic regions, also known as “dead zones”, are areas of the marine ecosystem characterised by a loss, or very low concentration, of oxygen. Organisms living in the foreshore of the beach must be adapted to both wet and dry conditions as this area is underwater at high tide. Common fish of the Mesopelagic include hatchetfish, lanternfish, barreleye fish, and bristlemouth fish (Shields, 2017). Web. Sand deposits from the berm crest often extend far inland, the result of large storm waves. These systems contrast with freshwater ecosystems, which have a lower salt content. The New York Times. Where water is trapped in rocky hollows at low tide, tide pools are often found. The richness and biodiversity of Canada's oceans provide enormous potential for both present and future generations. Marine Life. The formation of dead zones has been exacerbated by the increase in primary production and consequent worldwide coastal eutrophication fueled by riverine … Organisms living in the foreshore of the beach must be adapted to both wet and dry conditions as this area is underwater at high tide. Learn how your comment data is processed. Main Text. Aquatic plants absorb carbon dioxide from the air, and it releases oxygen back in the atmosphere. The pelagic zone is subdivided into vertical zones, based on factors such as sunlight amount. Marine ecosystems are the largest of Earth's aquatic ecosystems and are distinguished by waters that have a high salt content. Hypoxic regions, also known as “dead zones”, are areas of the marine ecosystem characterised by a loss, or very low concentration, of oxygen. Save my name, email, and website in this browser for the next time I comment. O Since 1998, The MarineBio Conservation Society has been a nonprofit volunteer marine conservation and science education group working online together to educate the world about ocean life, marine biology, marine conservation, and a sea ethic. Marine plants live in the euphotic zone of the ocean, because they need sunlight to create food through photosynthesis. Both marine plants and animals are found here. The marine ecosystems can broadly be classified into two main categories constituting 5 major marine ecosystems. The number of dead zones worldwide has quadrupled over the last half century. They dissolve the saltsin their own waters. Temperature. Watch. It is how animals, plants and the environment interact together and thrive. Marine ecosystems include nearshore systems, such as the salt marshes, mudflats, seagrass meadows, mangroves, rocky intertidal systems a Marine ecosystems are distinguished from freshwater ecosystems by the presence of dissolved compounds, especially salts (Na, Cl). Research Director, Patrick Prouzet took care of the ecosystem approach to the scientific management of Ifremer. Legal. 7. Dead zones in the coastal oceans have spread exponentially since the 1960s and have serious consequences for ecosystem functioning. When some types of algae blooms are large and produce chemicals, or toxins, the event is called a harmful algal bloom. An organism that interacts with the Bathypelagic zone is the Sloane viperfish, who migrates to surface waters during the night from its location in the Bathypelagic. The uneven edge of a sandy beach is formed when incoming waves divide, depositing sand as horns and scouring out sand to form cusps. For example, coastal zones make up just 4% of the earth’s total land area and 11% of the world’s oceans, yet they contain more than a third of the world’s population and account for 90% of the catch from marine fisheries. The mesopelagic zone is home to some of the most diverse fishes and behaviors. Deposition can also accrue by the bouncing movement of large particles or saltation, where materials present on the beach come from the erosion process of rocks offshore, from headland erosion (a narrow piece of land jutting offshore), and from the slumping producing deposits of scree (an accumulation of rocks and debris at the bottom of a hill). 2017. (Wikimedia). Canada's history has been defined by its surrounding marine environment. Marine waters cover more than 70% of the surface of the Earth and account for more than 97% of Earth's water supply and 90% of habitable space on Earth. Some of these regions are quite productive. Aquatic Ecosystems are classified into two types as freshwater ecosystems and marine ecosystems. The largest dead zone in the United States – about 6,500 square miles – is in the Gulf of Mexico and occurs every summer as a result of nutrient pollution from the Mississippi River Basin. The name for the abyssopelagic zone comes from the Greek word abyss which means “no bottom”. Scientists have found that marine life in the bathypelagic zone can have a mass 10 times greater than predicted (Broad, 2015). The average ocean depth is about 12,000 feet and the … The Marine Ecosystem has the Greatest Biodiversity on Earth. Because the water is so near to littoral zones, both freshwater and saltwater, the organisms existing here are often found in dunes or estuaries. Oregon Coast Aquarium. Beaches are landforms that are made by wave loading, a process in which waves or currents move deposition (sand or other loose material) that has been suspended in water onto the land. At 1,000-4,000 meters below, no light is able to penetrate the ocean water this deep, preventing any primary production. Missed the LibreFest? The Marine Ecosystem is the Largest Ecosystem on Earth. An ecosystem is the collection of living and non-living things in an area, and their relationship to each other. This zone extends all the way to where the continental shelf drops off into the abyssal plane. The photic zone (with light) of the open ocean consists of the epipelagic and mesopelagic zones. Constructive waves add material and move it up the beach while destructive waves wash material down the beach. In this zone, the flora generally consists of surface seaweeds. This zone, known as the “sunlit” zone, begins on the surface of the water and extends to the dark, sunlight-less area where photosynthesis ceases in production. There is no distinct line between a beach and dune because sand is always being exchanged between the two features. While these waters are known as the “deserts of the sea”, a wide variety of organisms still call the open ocean their home. Download our new mobile weather app . Marine ecosystems represent some of the most heavily exploited ecosystems throughout the world. Buy eBook. “Bathypelagic Zone.” DSA Presents. Topic :Conservation, environmental pollution and degradation 5) The world’s oceans are currently undergoing a dangerous transformation resulting into suffocating dead zones, in this context discuss the causes and effects of Oceanic dead zones on Marine ecosystem. Visited on Web 17 January 2019 https://sciencing.com/animals-abyssal-ecosystem-19407.html, Shields, Brenton. Extending from roughly 4,000-6,00 meters, the abyssopelagic zone is pitch-black and home to many organisms that are specialized to live in high pressure, cold, and lightless conditions (National Weather Service). This means that about 3 billion people rely on coastal and marine ecosystems, habitats and resources for food, building materials, building sites, and agricultural and recreational areas, while utilising coastal areas as a dumping ground for sewage, garbage, and toxic wastes. The organisms that live in the Midnight zone survive off of fallen organic matter from the zones above (OceanScape). Spreading Dead Zones and Consequences for Marine Ecosystems Robert J. Diaz1* and Rutger Rosenberg2 Dead zones in the coastal oceans have spread exponentially since the 1960s and have serious consequences for ecosystem functioning. • Umweltziel 3.2: Die Struktur und Funktion der Nahrungsnetze sowie der marinen Lebensräume wird durch Beifang, Rückwurf und grundgeschleppte Fanggeräte nicht weiter nachteilig verändert. Humans also frequently rely on the littoral region as can be observed in the large populations living near the sea. Scientists … Marine Weather for: Atlantic - Maritimes. The marine zone classification depending upon the ‘sunlight penetration into ocean water’is as follows: “Animals of the Abyssal Ecosystem”. The benthic zone is home to a massive amount of oceanic life referred to as “benthos”, or bottom-dwellers. The total amount of productivity in a region or system is gross primary productivity. Mangrove trees, which live on muddy tropical shores, are also part of the ocean ecosystem. MARINE ECOSYSTEMS GEOL 1033 (Lesson 36) ppt file 103-30b Comparative Biological Productivity GENERALIZED COASTAL ECOSYSTEM MODEL FOOD CHAIN vs FOOD WEB Food chain A ... – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 7da1b0-ODA4O Studying ecosystems is known as ecology. (250 words) Reference Why this question: The world’s oceans are currently undergoing a dangerous transformation. Sciencing. Click on the coloured marine region for which you would like the marine forecast or latest warning. The epipelagic zone stretches from the surface down to 200 m and is home to the greatest biodiversity in the sea, largely because of the availability of sunlight that enables photosynthetic organisms to thrive. No warning or watch. We live on the water planet, with precious film of water, most of it saltwater covering about 71% of the Earth’s surface. Main Text. The open marine ecosystem extends up to 150 meters from the ocean surface. In general the photic zone would not be found below 200 meters and would normally be well above this. Temperatures this deep are fairly constant and hover around 39 degrees Fahrenheit. The infratidal zone is located below the low tide line. Sciencing. At the drift line, significant sand movement by wind can occur from storm waves when they reach far inland. It is estimated that around 90% of all global fish biomass occurs in this zone (Broad, 2015). 15 January 2019. www.weather.gov/jetstream/layers_ocean, Pusparini, N., Prasetyo, B., Ambariyanto, Widowati, I. The benthic zone is the lowest level of the ocean, encompassing the sediment surface and the water level right above it, starting from the shoreline and expanding to the deepest part of the ocean floor. Interestingly, although these animals have unique adaptations to their environment, many belong to the same groups of continental shelf species (Brennan, 2018). The topmost part of a marine ecosystem is the euphotic zone, extending down as far as 200 meters (656 feet) below the surface. Coral reefs are also significant sources of sand particles for beaches. “Dark Region of Ocean May Shed Light on Climate Change and Other Issues”. In contrast to the epipelagic zone where photosynthesis provides the main food resources for many ocean organisms, the abyssopelagic marine life rely on detritus (dead marine organisms) to sink towards this deep layer for resources. The rocky shore is one of the best-studied marine ecosystems, and many of the earliest discoveries about marine ecology were made by scientists who study the complex marine communities that live in this system. Abyssal plains usually are found between the base of a continental rise (or shelf) and a mid-oceanic ridge. Marine Life Zones. Download our new mobile weather app . Using light the marine environment is divided into the photic zone and aphotic zone. Unlike its sister zones, the benthic (from Greek: “Depth of the sea”) zone is characterized not by its depth but by the body of water itself. The habitats of the open seas and adjacent coastal zones are classified under marine ecosystems. Rivers, ponds, and lakes are all freshwater bodies. Have questions or comments? The name, “abyssopelagic” comes from the Greek meaning “bottomless abyss”, in times where it was thought that the deep ocean never ended. Dead zones have now been reported from more than 400 systems, affecting a total area of more than 245,000 square kilometers, and are probably a key stressor on marine ecosystems. The pressure this far deep would amount to 5,800 lbs per square inch, and it would be hard to believe life can withstand this much force (National Weather Service). The large amount of water available helps to create a nice habitat for a variety of plants and animals and adds humidity, a feature that allows for the more unique organisms to survive. The pelagic zone is divided into epipelagic, mesopelagic, bathypelagic, abyssopelagic, and hadopelagic zones. Open in new tab Download slide. It changes with the seasons, latitude, time of day, clarity of the water, as well as with the weather. The bathypelagic zone is known as the “midnight” zone for its characteristically lightless waters. For example, coastal zones make up just 4% of the earth’s total land area and 11% of the world’s oceans, yet they contain more than a third of the world’s population and account for 90% of the catch from marine fisheries. Environment and natural resources; Weather information; Marine; Features . The nature of waves and the material available shapes the beach. Like ponds and lakes, the ocean regions are separated into separate zones: intertidal, pelagic, abyssal, and benthic. Out of all marine species, 98% of them can be found on the ocean floor, making the benthic zone the lifeblood of diversity in the ocean, comprised of mostly scavengers or detritivores, organisms that feed off of dead organic material. Delineation of marine ecosystem zones in the northern Arabian Sea during winter. Dead zones have now been reported from more than 400 systems, affecting a total area of more than 245,000 square kilometers, and are probably a key stressor on marine ecosystems. Saleem Shalin 1,a, Annette Samuelsen 2, Anton Korosov 3, Nandini Menon 1, Björn C. Backeberg 4,5,3, and Lasse H. Pettersson 3 Saleem Shalin et al. Marine algae supply much of the world's oxygen supply and take in a huge amount of atmospheric carbon dioxide. 5. Marine Ecosystem | Iken Edu This interactive animation describes about marine ecosystem. JOEMAR J. CABRADILLA Instructor I Ilocos Sur Polytechnic State College 2. Marine ecosystems are considered to be the habitats that complete the larges system from the shores to the dark sea floor. The hadopelagic zone is the area of deep water in the deepest ocean trenches. Shores are considered intertidal zones of the marine ecosystem. Trenches in the ocean are narrow and long depressions in the ocean floor. The supralittoral zone or “spray zone” is only underwater during storms, and is located between the high-tide line and dry land. Reaching up to 13-18 feet long, megamouth shark are large filter feeders that swim with their mouth open to collect food (Oceana). The intertidal zone is located between low and high tide and is affected by tidal movements. More on the Benthic Zone: Helpful websites and reading sources, https://www.cabi.org/isc/datasheet/107788, https://watersheds.ca/wp-content/uploads/2016/02/Benthic-zone-Final.pdf, “Midnight Zone.” Oceanscape Network. 16 January 2019. www.oceanscape.aquarium.org/explore/subecosystems/midnight-zone, Roberts, Madeline. The marine biome _____. Everything except areas near the coast and the sea floor is called the pelagic zone. The variability of this line can be altered by unusual weather patterns, like a monsoon, or local impacts (Pusparini et al., 2017). The bathypelagic zone is from 1,000-4,000 m and completely dark. Many of their inhabitants have adaptations that enable them to survive periodic exposure to the air and wave action. These plants include seaweeds, marine algae and sea grasses. As a portion of the deep sea, there are no currents that affect this zone, rendering it as a relatively stable environment. Some say that the ocean contains the richest diversity of species even though it contains fewer species than there are on land. Warning. Clipping is a handy way to collect important slides you want to go back to later. Marine ecosystems include a unique combination of animals, plants, microorganisms and coastal and ocean habitats. Marine ecosystems are an important part of the world, because the marine ecosystems give marine life such as: tiny plankton, fish, crustaceans, invertebrates, reptiles, marine mammals, sharks, and rays a place to live and survive. It has two types of regions: Photic, which have light; and Aphotic, which have no light. The sublittoral zone is always underwater and is below the low tide line. These ocean currents are responsible for creating massive hurricanes and typhoons. The drift line is the high point of material deposited by waves and could potentially be called the dividing line between the beach and the dunes. This is so cool: a sea slug capturing its food! Protected lands and waters are legally established areas set aside to conserve nature and cultural values. Most marine life inhabits this zone. Epipelagic, Mesopelagic, Bathypelagic, and Abyssopelagic zones are depicted. At the bottom portion of the face there is usually a trough. The formation of … In marine ecosystems the climate is a severe type of climate, due to the different ocean currents that are constantly moving in the sea. The new protected area will join the U.K.’s Blue Belt Programme, which, as of today, safeguards 2.7 million square miles of marine ecosystems around the world. Doctor of Science in marine sedimentology and geochemistry, André Monaco is also emeritus research director at the CNRS. The littoral zone in a pond or lake allows for prolific photosynthetic activity and consequently hosts almost all of the aquatic plant life. The mesopelagic zone reaches 200-1000m in depth. Most animals in the abyssopelagic zone, located from 4,000 m down, are blind and colorless due to the complete lack of light. Visited on 17 January 2019. https://oceana.org/marine-life/sharks-rays/megamouth-shark, http://www.businessinsider.com/bristlemouth-fish-is-the-most-abundant-vertebrate-on-earth-2015-6, https://upload.wikimedia.org/Wikipedia/commons/c/cb/THERMOCLINE.png, https://en.Wikipedia.org/wiki/Oceani..._divisions.svg, en.Wikipedia.org/wiki/Deep_s...dus_sloani.jpg. 2. The Mariana Trench is the deepest part of the ocean and was discovered during a voyage to the Challenger Deep. We live on the water planet, with precious film of water, most of it saltwater covering about 71% of the Earth’s surface. The beach berm is the part of a beach above water (depending on the tide) that is actively influenced by the waves at some point in the tide. Fish suffer greatly from dead zones because the extreme changes in the oxygen level changes their entire biology. Watch the recordings here on Youtube! The intertidal zone is where the ocean meets the land, and it varies in appearance depending on its geographical location and the time of the day. marine ecosystem characteristics and types. 15 January 2019. www.dsapresents.org/staff/victoria-brown/files/2011/08/Bathypalagic-per-5.pdf, “Layers of the Ocean.” National Weather Service. The intertidal zone is where the ocean meets the land — sometimes it is submerged and at other times exposed, as w… Web. Animals like sea anemones, barnacles, chitons, crabs, isopods, limpets, mussels, sea stars, snails and whelks have all adapted to survive being smashed by rough waves or carried out to sea. Of equal significance are internal waters having large marine components such as the St. Lawrence Estuary and the Gulf of St. Lawrence, Hudson Bay and James Bay. Many marine life have an important role in the world such as the tiny plankton because without them the world would build up with carbon dioxide, the plankt… Marines Ökosystem. The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. The intertidal or littoral zone (also known as the foreshore) is located between average high tide and average low tide. Dead zones have now been reported from more than 400 systems, affecting a total area of more than 245,000 square kilometers, and are probably a key stressor on marine ecosystems. Two third of earth is covered by water and they constitute of oceans, seas, intertidal zone, reefs, seabed, estuaries, hydrothermal vents and rock pools. These plants absorb carbon dioxide and turn it into oxygen through photosynthesis. Choose from 500 different sets of marine ecosystems zones flashcards on Quizlet. Marine ecosystem covers the largest surface area of the earth. These systems contrast with freshwater ecosystems, which have a lower salt content. Learn marine ecosystems zones with free interactive flashcards. For more information contact us at firstname.lastname@example.org or check out our status page at https://status.libretexts.org.  Over this period, many aquatic ecosystems have perished, and a large number of water dwelling creatures have felt the detrimental effects of human negligence. Based on his revised description, beaches also include the submerged longshore bars. Each life form is unique and native to its habitat. Animals like sea anemones, barnacles, chitons, crabs, isopods, limpets, mussels, sea stars, snails and whelks have all adapted to survive being smashed by rough waves or carried out to sea. The littoral zone can refer to the shoreline of a body of fresh or saltwater and also means any area close to the water or influenced by the water. For a freshwater biome, the littoral zone is the area with abundant light close to the shore. Web. Sandy beaches are gently sloped due to the removal of sand by the backwash of waves. The Pacific Ocean has the least number of abyssal plains, the direct result of sediments in submarine trenches surrounding the Pacific Ocean becoming trapped. A certain amount of organic material is used to sustain the life of producers; what remains is net productivity. B. der Sansibar-Felterfisch, der Ostafrika-Kaiserfisch oder der Gebänderte Papageifisch).Die südafrikanische De Hoop Marine Protected Area ist ein bedeutender Lebensraum für zahlreiche Delfine und dem Südkaper. Marine ecosystem - Marine ecosystem - Biological productivity: Primary productivity is the rate at which energy is converted by photosynthetic and chemosynthetic autotrophs to organic substances. My Weather Profile Weather shortcuts Weather Topics | Access city. They make up 70%of the earth’s surface. The Arctic, Pacific and Atlantic Oceans are important to our culture, our economy, and our national identity. Water/Pelagic environment consists of two major marine ecosystems, Neritic and Oceanic zones. Whenever you think of the marine ecosystem, the first picture that comes to your mind is the open water surface. Marine Forecasts and Warnings for Canada. These plants include seaweeds, marine algae and sea grasses. 2015. Figure 1. All four zones have a great diversity of species. In the field of fisheries, he made amphihalin expertise on fish management internationally. The populations of these organisms are so large that WWII hydroacoustic researchers were not able to penetrate the zone because of the high biomass of organisms with swim bladders. Bottom/Benthic environment consists of the other three major ecosystems, Supralittoral, Intertidal/Littoral, and Sublittoral zones. Visited on 17 January 2019. https://www.nytimes.com/2015/06/30/science/dark-region-of-ocean-may-shed-light-on-climate-change-and-other-issues.html, Oceana. 25 Citations; 24 Mentions; 15k Downloads; Part of the Studies in Ecological Economics book series (SEEC, volume 9) Log in to check access. a. is a large ecosystem, but not larger than some terrestrial ecosystems b. is characterized by four different zones c. has little species diversity d. covers a small portion of the Earth s surface The major ocean trenches are the Cayman Trench at 7,686 m maximum depth, the Japan Trench at 9,000 m maximum depth, the Kermadec Trench, the Aleutian Trench, the Kuril Trench, the Marian Trench, the Middle America Trench, the Peru-Chile Trench at 8,065 m maximum depth, the Puerto Rico Trench, the Ryukyu Trench (or Nansei-Shoto Trench), the Sundra Trench, and the Tonga Trench at 10,882 m maximum depth. The surface was not always smooth, but became covered in fine-grained sediments like clay and silt deposited from turbidity currents and channeled down underwater canyons into deeper areas. They are the deepest areas of the ocean floor and are usually several hundred kilometers long. Studying ecosystems is known as ecology. This site uses Akismet to reduce spam. For example – like land plants, the water plants also help in minimizing the carbon level in the atmosphere. Organisms like shrimp and flounders that move about freely in the water above the benthic zone but live at the bottom of the zone are called nektobenthos. The four ocean zones of a marine ecosystem are the intertidal, the neritic, the bathyal, and the abyssal. The marine ecosystem plays an important role in the protection of the environment. With the development of ocean floor mapping technologies, researchers know now that the abyssopelagic zone contains three-quarters of the ocean floor’s total area. An ocean dead zone is an invisible trap that there is no escaping from for marine life. The berm has a crest at the top and a face, which is the slope leading down to the water. From 200-1,000 m is the mesopelagic zone, a twilight zone where some light filters through but does not reach a level of brightness necessary for photosynthesis to occur. http://iopscience.iop.org/article/10.1088/1755-1315/55/1/012039/pdf, Brennan, John. Animals that can live here survive on the dead material, or detrius, that falls from surface zones on other animals that live in the deep sea. This is only 7 degrees warmer than the temperature that freshwater freezes at! Marine Ecosystem 1. Dead zones in the coastal oceans have spread exponentially since the 1960s and have serious consequences for ecosystem functioning. The number of dead zones worldwide has quadrupled over the last half century. Caused by increasing water pressure, the abyssopelagic zone is much less explored than the shallower ocean zones, and it is frequent that scientists discover new species when exploring this area. Early oceanographers believed that this zone did not reach the ocean’s floor. Specific types of marine life vary with location, but in general, some types of marine life … Almost half of the known species on … This effect results in the flattest and smoothest regions of the world. This zone, also known as the open ocean, is comprised of oceanic water that is not in direct contact with the shore or sea floor. Download our new mobile weather app . 4. Many of the fish in this region are on the smaller side, but the megamouth shark (Megachasma pelagios) stands out because of its unusually massive size (Oceana). Plants are non-existent in the bathypelagic zone. Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. Supplies food for humans and generates socioeconomic benefits. The depth of the thermocline varies in space and time and does not remain uniform across the globe as it is dependent on the season and year. The habitats of the open seas and adjacent coastal zones are classified under marine ecosystems. Our continental shelf is one of the largest i… At this depth, there is sufficient light for regular photosynthetic activity. “The Thermocline Layer and Chlorophyll-a Concentration Variability during Southeast Monsoon in the Banda Sea.” IOP Science. https://www.youtube.com/watch?v=UwVNkfCov1k: Just how deep does the ocean go? JetStream. Due to their extreme adaptations, benthos do not travel far up the water column and use dead or decaying organic matter that drifts down from higher levels as a main energy source. Coastal Zones Ecosystem Services From Science to Values and Decision Making. Choose a coloured marine region for the latest marine weather. This mixing allows for a distribution of heat in this layer around the world, from super warm in the Persian Gulf (97 degrees Fahrenheit) to super cold up at the North Pole (28 degrees Fahrenheit) (National Weather Service)! Marine ecosystems include not just the oceans but also shorelines, tidepools, estuaries, barrier islands, mangrove forests, and salt marshes. Oceans; Coral reefs; Estuaries; Oceans. The abyssal plain is a flat or gently sloping part of the ocean floor, reaching a depth between 2,200-5,500 m. In the abyssal plain, rocks are embedded into the ocean floor due to the lack of supporting heat energy below. Organisms living in the foreshore of the beach must be adapted to both wet and dry conditions as this area is underwater at high tide. Here are the top 5 facts about marine ecosystem. This open water surface is known as the marine ecosystem; This is the upper layer of the ocean where sun rays reach quite easily. Die Mangroven, Seegrasgewächse und Korallenriffe im und um das Agulhasbecken reflektieren einen hohen Grad an Biodiversität und Endemismus (z. The hydrosphere connects all … Delineation of marine ecosystem zones in the northern Arabian Sea during winter. They usually stretch down 3-4 km below the surrounding ocean floor. Marine ecosystems are immensely varied both in type and geographical extent. Melville’s Whale Was a Warning We Failed to Heed, Amanda Jelena Radoman: Manatees being fed sweet potatoes… while looking like sweet potatoes, Trying to Make Sense of This Overwhelming World. It also gives those marine animals a place to hunt. The only source of light in this zone comes from organisms using bioluminescence (National Weather Service). Tropical Cyclone … The intertidal zone is located between high and low tides. The marine ecosystem includes: marshes, tidal zones, estuaries, the mangrove forest, lagoons, sea grass beds, the sea floor, and the coral reefs. Bioluminescent organisms, some of the strangest marine creatures of the deep live here. The lower zones are often simply grouped into the aphotic zone by marine biologists due to their similarities.