Zostera marina • herbe de mer, varech marinLa Zostère marine (Zostera marina), aussi appelée herbe de mer ou varech marin, de la famille des Zosteraceae, est une plante à fleur aquatique qui se rencontre sur les fonds marins sableux ou sablo-vaseux de l’hémisphère nord.

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dbpedia-owl:abstract
  • Zostera marina • herbe de mer, varech marinLa Zostère marine (Zostera marina), aussi appelée herbe de mer ou varech marin, de la famille des Zosteraceae, est une plante à fleur aquatique qui se rencontre sur les fonds marins sableux ou sablo-vaseux de l’hémisphère nord. Cette plante, qui a failli disparaître de l’océan Atlantique dans les années 1930 et accuse actuellement une régression de population, fut une source de nourriture pour les Amérindiens et continue d’avoir, de nos jours, un rôle écologique important par son aptitude à former des herbiers marins.
  • Zostera morska, tasiemnica morska (Zostera marina L.) – gatunek rośliny z rodziny zosterowatych (Zosteraceae).
  • Groot zeegras (Zostera marina) is een ondergedoken zeewaterplant (hydrofyt) die behoort tot de Zeegrasfamilie (Zosteraceae).Ze staat op de Nederlandse Rode lijst van planten als zeldzaam en sterk afgenomen. Sinds de jaren 1930 is de plant sterk achteruitgegaan, daarvoor was er in het Nederlandse kustgebied en de Zuiderzee 6.000 tot 15.000 hectare groot zeegras. Één van de mogelijke oorzaken is de aantasting door de slijmzwam Labyrinthula zosterae in het hele Noord-Atlantische verspreidingsgebied.De plant komt van nature voor in de kustgebieden van het Noordelijk halfrond en kan tot in 10 m en in enkele gevallen tot in 17 m diep water groeien.De vaste plant wordt 20 tot 150 cm hoog en vormt witte, monopodiale wortelstokken. De lijnvormige bladeren zijn 20 tot 50 cm lang en 2 tot 9 mm breed met 3 tot 11 nerven, waarvan de buitenste nerf niet dichtbij de bladrand ligt. Oortjes ontbreken en de bladtop is afgerond.Groot zeegras bloeit van juni tot de herfst. Op de aar zitten twee rijen bloemen. De bloemen hebben geen kelk- en kroonbladen. De bestuiving vindt onderwater plaats. De stuifmeelkorrels zijn draadvormig.De vrucht is een geribd nootje met een gespleten snavel dat door het water verspreidt wordt. De vruchten worden ook door vogels en vissen gegeten wat tevens zorgt voor verdere verspreiding van de plant.De plant komt voor in ondiepe gebieden van de Waddenzee en de zeearmen en vormt daar onderzeese graslanden die van belang zijn als foerageergebied en voor de eiafzetting van vissen en andere waterdieren.Groot zeegras is een voedselplant voor o.a. de rotgans en smient.
  • Zostera marina is a species of seagrass known by the common names common eelgrass and seawrack. It is an aquatic plant native to marine environments on the coastlines of mostly northern sections of North America and Eurasia. It is the most wide-ranging marine flowering plant in the Northern Hemisphere. It lives in cooler ocean waters in the North Atlantic and North Pacific, and in the warmer southern parts of its range it dies off during warmer seasons. It grows in the Arctic region and endures several months of ice cover per year. It is the only seagrass known from Iceland. It can be found in bays, lagoons, estuaries, on beaches, and in other coastal habitat. There are several ecotypes, each with specific habitat requirements. It occurs in calmer waters in the sublittoral zone where it is rarely exposed to air. It anchors via rhizome in sandy or muddy substrates and its leaves catch particulate debris in the water which then collects around the bases of the plants, building up the top layer of the seabed.This flowering plant is a rhizomatous herb which produces a long stem with hairlike green leaves that measure up to 1.2 centimeters wide and may reach over a meter long. It is a perennial plant but it may grow as an annual. The rhizome grows horizontally through the substrate, anchoring via clusters of roots at nodes. The plant is monoecious, with an individual bearing both male and female flowers in separate alternating clusters. The fruit is a nutlet with a transparent coat containing the seed. The plant can also undergo vegetative reproduction, sprouting repeatedly from its rhizome and spreading into a meadowlike colony on the seabed known as a genet. One meadow of cloned eelgrass was determined to be 3000 years old, genetically. When undergoing sexual reproduction, the plant produces large quantities of seeds, at times numbering several thousand seeds per square meter of plants. The plant disperses large distances when its stems break away and carry the fertile seeds to new areas, eventually dropping to the seabed. The seagrass is a favorite food of several species of waterfowl, which may also distribute the seeds.This plant is an important member of the coastal ecosystem in many areas because it helps to physically form the habitat and it plays a crucial role for many other species. For example, it provides a sheltered spawning ground for the Pacific herring (Clupea pallasii). Juvenile Atlantic cod (Gadus morhua) hide in eelgrass beds as they grow. The Blue mussel (Mytilus edulis) attaches to its leaves. The green alga Entocladia perforans, an endophyte, depends on this eelgrass. A great many animals use the plant for food, including the isopod Idotea chelipes and the purple sea urchin Paracentrotus lividus. The Atlantic Brant (Branta bernicula hrota) subsists almost entirely on the plant. When the eelgrass dies, detaches, and washes up on the beach a whole new ecosystem is founded; many species of insects and other invertebrates begin to inhabit the dead plant, including the amphipod Talitrus saltator, the fly Fucellia tergina, and the beetles Stenus biguttatus, Paederus littoralis, and Coccinella septempunctata.Populations of the plant have been damaged by a number of processes, especially increased turbidity in the water; like most other plants, eelgrass requires sunlight to grow. One plant may adapt to light level by growing longer leaves to reach the sun in low-light areas; individuals in clear or shallow water may have leaves a few centimeters long, while individuals in deeper spots may have leaves over a meter long. Human activities such as dredging and trawling damage eelgrass meadows; practices used in scallop and mussel harvesting in the Wadden Sea have cleared much eelgrass from the sea bottom there. Aquaculture operations and coastal development destroy colonies. Pollution from many sources, including riverside farms, sewage lines, fish processing plants, and oil spills damage eelgrass meadows. Conservation and restoration efforts of Zostera marina habitats have been plenty since their rapid decline started several decades ago.Invasive species have been shown to have a negative effect on eelgrass and associated ecosystems. In Nova Scotia the invasive exotic green crab (Carcinus maenas) destroys eelgrass when it digs in the substrate for prey items. The decline of eelgrass in Antigonish Harbour has resulted in fewer Canada Geese, which feed on the rhizome, and fewer Common Goldeneye, which eat invertebrates that live in eelgrass meadows.The slime mold Labryrinthula zosterae caused a "wasting disease" of eelgrass resulting in large-scale losses in the 1930s; localized populations are still affected by the slime mold today. During this time, populations of the eelgrass-eating Atlantic Brant dropped. Remaining geese ate less-preferred food plants and algae and hunters subsequently noticed that Brant meat began to taste different. Even today Brants no longer migrate over the Nova Scotia area.People have long used this plant species as roof thatching in some areas. It has been used as fertilizer and cattle fodder in Norway for centuries. It could also be dried and used as stuffing for mattresses and furniture.The bacterial species Granulosicoccus coccoides was first isolated from the leaves of the plant.
  • アマモ(甘藻 Zostera marina)は、北半球の温帯から亜寒帯にかけての水深1-数mの沿岸砂泥地に自生する海草の一種。日本でも各地に分布する。雌雄同株で多年生の顕花植物であり、胞子で増える藻類ではなく、海中に生える種子植物である。
  • Das Gewöhnliche Seegras (Zostera marina) ist eine Pflanzenart in der Familie der Seegrasgewächse (Zosteraceae). Es wächst untergetaucht (submers) an den Meeresküsten der Nordhalbkugel und bildet dort zusammen mit weiteren marinen Arten aus der Ordnung der Froschlöffelartigen (Alismatales) unterseeische Seegraswiesen, die wichtige Lebensräume für Fische als Laichplatz und andere marine Tiere sind.
  • Zostera marina, es una especie de planta acuática perteneciente a la familia Zosteraceae.
  • Zostera marina L. è una fanerogama marina della famiglia Zosteraceae.
  • A közönséges tengerifű (Zostera marina) az egyszikűek (Liliopsida) osztályának a hídőrvirágúak (Alismatales) rendjébe, ezen belül a tengerifűfélék (Zosteraceae) családjába tartozó faj.A Zostera növénynemzetség típusfaja.
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  • Category:Zostera marina
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  • Zostera marina
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  • varech marin
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  • Zostera marina
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  • Zostera marina • herbe de mer, varech marinLa Zostère marine (Zostera marina), aussi appelée herbe de mer ou varech marin, de la famille des Zosteraceae, est une plante à fleur aquatique qui se rencontre sur les fonds marins sableux ou sablo-vaseux de l’hémisphère nord.
  • Zostera morska, tasiemnica morska (Zostera marina L.) – gatunek rośliny z rodziny zosterowatych (Zosteraceae).
  • アマモ(甘藻 Zostera marina)は、北半球の温帯から亜寒帯にかけての水深1-数mの沿岸砂泥地に自生する海草の一種。日本でも各地に分布する。雌雄同株で多年生の顕花植物であり、胞子で増える藻類ではなく、海中に生える種子植物である。
  • Das Gewöhnliche Seegras (Zostera marina) ist eine Pflanzenart in der Familie der Seegrasgewächse (Zosteraceae). Es wächst untergetaucht (submers) an den Meeresküsten der Nordhalbkugel und bildet dort zusammen mit weiteren marinen Arten aus der Ordnung der Froschlöffelartigen (Alismatales) unterseeische Seegraswiesen, die wichtige Lebensräume für Fische als Laichplatz und andere marine Tiere sind.
  • Zostera marina, es una especie de planta acuática perteneciente a la familia Zosteraceae.
  • Zostera marina L. è una fanerogama marina della famiglia Zosteraceae.
  • A közönséges tengerifű (Zostera marina) az egyszikűek (Liliopsida) osztályának a hídőrvirágúak (Alismatales) rendjébe, ezen belül a tengerifűfélék (Zosteraceae) családjába tartozó faj.A Zostera növénynemzetség típusfaja.
  • Groot zeegras (Zostera marina) is een ondergedoken zeewaterplant (hydrofyt) die behoort tot de Zeegrasfamilie (Zosteraceae).Ze staat op de Nederlandse Rode lijst van planten als zeldzaam en sterk afgenomen. Sinds de jaren 1930 is de plant sterk achteruitgegaan, daarvoor was er in het Nederlandse kustgebied en de Zuiderzee 6.000 tot 15.000 hectare groot zeegras.
  • Zostera marina is a species of seagrass known by the common names common eelgrass and seawrack. It is an aquatic plant native to marine environments on the coastlines of mostly northern sections of North America and Eurasia. It is the most wide-ranging marine flowering plant in the Northern Hemisphere. It lives in cooler ocean waters in the North Atlantic and North Pacific, and in the warmer southern parts of its range it dies off during warmer seasons.
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  • Zostère marine
  • Gewöhnliches Seegras
  • Groot zeegras
  • Közönséges tengerifű
  • Zostera marina
  • Zostera marina
  • Zostera marina
  • Zostera morska
  • アマモ
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