The near-surface open water surrounded by the littoral zone is the Limnetic zone. The Limnetic zone is the layer of open water where photosynthesis can occur. 11. Bacteria decompose the detritus that reaches this zone, but they consume oxygen in the process, so dissolved oxygen concentrations are not sufficient to support many large organisms. 32. phytoplankton. The limnetic zone is well-lighted (like the littoral zone) and is dominated by plankton, both phytoplankton and zooplankton. Which is not the characteristic of ‘r’ selected species? ... limnetic zone. The tiny, photosynthetic, primary producers of open water such as desmids, diatoms, and filamentous algae are referred to as _____. The littoral zone is the shallow water region which is usually occupied by rooted plants. In lakes and ponds, oxygen concentrations are lowest in the A) benthic zone. Universidad del País Vasco/EHU. Email: gvpsalai@lg.ehu.es The littoral zone comprises the land placed near the seaand that receives the direct influence of the sea. 33. Profundal zone; Tidal zone; Benthic zone; Limnetic zone; Also read: Aquatic Ecosystem. Diatoms are main producers of this zone. Limnetic Zone: this is the central part of pond upto where there is the penetration of effective light water level, oxygen content and tem[perature varies time to time in this zone. (i) Producers (ii) Consumers (iii) Decomposers and transformers. As planktons are the primary producers, hence the limnetic zone plays an essential role in the food chain of a freshwater ecosystem. In very small and shallow lakes or ponds the limnetic zone may be absent. A region of water below the limnetic zone, where sunlight does not reach. Isabel Salcedo Dpto. Biología Vegetal y Ecología. here the light penetration is lesser so called thermocline. This zone is inhabited mainly by plankton and nekton with occasional neuston species. This zone is inhabited mainly by plankton and nekton with occasional neuston species. Primary producer; 10. Primary productors (producers) of the littoral zone. E-48080 BILBAO. The photic zone is also termed as a limnetic zone. D) profundal zone. 644. Benthic/profundal zone is rich in anaerobic bacteria and fungi. B) littoral zone. Littoral Zone •Zone that is closest to the shore •Sunlight reaches all the way to the bottom •Producers here are plants rooted to the bottom, •consumers here are snail, flatworms, frogs and fish Limnetic Zone •Open water where photosynthesis occurs •most often found in large lakes •Very shallow •Plankton and actively swimming Deep water zone is called profundal or benthic zone which is a region of great biological activity. 31. C) limnetic zone. Seaweeds, lichens and vascular plants. On the basis of water depth and types of vegetation and animals there may be three zones in a lake or pond littoral, limnetic and pro-fundal. limnetic zone The area in more extensive and deeper freshwater ecosystems that lies above the depth at which light penetration is reduced to a level where the amount of oxygen produced by photosynthesis balances the amount consumed by respiration, and beyond the littoral zone. limnetic zone. Apdo. The bottom sediment, known as the benthic zone, has a surface layer abundant with organisms. It is the zone of a lentic ecosystem that is generally dominated by planktons (both phytoplankton and zooplankton). The bottom area where production is less than respiration in a pond ecosystem is termed as. Open water zone is called limnetic zone. Producers cannot survive here so nutrients are not easily recycled into the food web. Profundal Zone: This is the deep-water region where the re is no effective light penetration. The limnetic and littoral zones together comprise the euphotic (well-illuminated) zone. The limnetic zone is the open water area where light does not generally penetrate all the way to the bottom.