Zostera japonica

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Japanese eelgrass
Zostera japonica Asch. MNHN 1446828719236qKQSmGZrCbA8au6X.jpeg
Zostera japonica
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Alismatales
Family: Zosteraceae
Genus: Zostera
Species:
Z. japonica
Binomial name
Zostera japonica
Synonyms [3]
  • Nanozostera americana(Hartog) Toml. & Posl.
  • Nanozostera japonica(Asch. & Graebn.) Toml. & Posl.
  • Zostera americanaHartog

Zostera japonica is a species of aquatic plant in the Zosteraceae family. [2] It is referred to by the common names dwarf eelgrass [4] or Japanese eelgrass, and is native to the seacoast of eastern Asia from Russia to Vietnam, and introduced to the western coast of North America. It is found in the intertidal zone and the shallow subtidal, and grows on sandy, muddy and silty substrates.

Contents

Distribution and habitat

It is considered native in the Russian Far East (Sakhalin, Kamchatka, Primorye, and the Kuril Islands), Japan, Korea, China, the Ryukyu Islands, Taiwan and Vietnam. It was first reported as being naturalized in British Columbia and in the US State of Washington, [5] [6] [7] but is now considered invasive as far south as California. It is believed to have been introduced with a shipment of Japanese oysters some time in the first half of the twentieth century. [8] This seagrass is mainly found in sheltered bays where the seabed is sand, mud or silt. It occurs in the intertidal zone and at depths down to about 3 m (10 ft). [1]

Ecology

Japanese eelgrass in Canada Zostera japonica Asch iNaturalist 64839789.jpeg
Japanese eelgrass in Canada

Japanese eelgrass is a small species and usually grows on the upper edge of seagrass beds, typically on mudflats exposed at low tide. The plants lose many of their leaves in the winter. [1] In Hong Kong, algae grows on the blades of this seagrass and snails in the species Clithon graze on this epiphytic growth. In a research study, where the snails were excluded from certain areas of seagrass bed, the epiphytic load increased and this had a deleterious effect on the total biomass of the seagrass, reducing the amount of photosynthesis and increasing physical damage from waves and currents. In the presence of the snails, the grass blades were kept cleaner, were less likely to break off and their total biomass was increased. [9]

On the west coast of North America, the non-native Japanese eelgrass is now found in the same habitats as the native common eelgrass ( Zostera marina ), growing beside it and sometimes displacing it. The habitat in which they both occur is used by economically important shellfish. Further research is needed to clarify the roles of the two species in the habitat and whether any management strategies are needed to protect the native species from the invader. [10] One difference between the two is that Z. marina undergoes microbial decomposition more slowly than does Z. japonica so that nutrients are recycled more quickly with the latter, giving alterations in both total productivity and in the structure of the decomposer community. [8]

Related Research Articles

<span class="mw-page-title-main">Epiphyte</span> Non-parasitic surface organism that grows upon another plant but is not nourished by it

An epiphyte is a plant or plant-like organism that grows on the surface of another plant and derives its moisture and nutrients from the air, rain, water or from debris accumulating around it. The plants on which epiphytes grow are called phorophytes. Epiphytes take part in nutrient cycles and add to both the diversity and biomass of the ecosystem in which they occur, like any other organism. They are an important source of food for many species. Typically, the older parts of a plant will have more epiphytes growing on them. Epiphytes differ from parasites in that they grow on other plants for physical support and do not necessarily affect the host negatively. An organism that grows on another organism that is not a plant may be called an epibiont. Epiphytes are usually found in the temperate zone or in the tropics. Epiphyte species make good houseplants due to their minimal water and soil requirements. Epiphytes provide a rich and diverse habitat for other organisms including animals, fungi, bacteria, and myxomycetes.

<span class="mw-page-title-main">Seagrass</span> Plants that grow in marine environments

Seagrasses are the only flowering plants which grow in marine environments. There are about 60 species of fully marine seagrasses which belong to four families, all in the order Alismatales. Seagrasses evolved from terrestrial plants which recolonised the ocean 70 to 100 million years ago.

<span class="mw-page-title-main">Coos Bay</span> Estuary in Oregon, United States

Coos Bay is an estuary where the Coos River enters the Pacific Ocean, the estuary is approximately 12 miles long and up to two miles wide. It is the largest estuary completely within Oregon state lines. The Coos Bay watershed covers an area of about 600 square miles and is located in northern Coos County, Oregon, in the United States. The Coos River, which begins in the Oregon Coast Range, enters the bay from the east. From Coos River, the bay forms a sharp loop northward before arching back to the south and out to the Pacific Ocean. Haynes Inlet enters the top of this loop. South Slough branches off from the bay directly before its entrance into the Pacific Ocean. The bay was formed when sea levels rose over 20,000 years ago at the end of the Last Glacial Maximum, flooding the mouth of the Coos River. Coos Bay is Oregon's most important coastal industrial center and international shipping port, with close ties to San Francisco, the Columbia River, Puget Sound and other major ports of the Pacific rim.

<i>Zostera</i> Genus of aquatic plants

Zostera is a small genus of widely distributed seagrasses, commonly called marine eelgrass, or simply seagrass or eelgrass, and also known as seaweed by some fishermen and recreational boaters including yachtsmen. The genus Zostera contains 15 species.

<span class="mw-page-title-main">Environmental issues in Puget Sound</span>

Puget Sound is a deep inlet of the Pacific Ocean in Washington, extending south from the Strait of Juan de Fuca through Admiralty Inlet. It was explored and named by Captain George Vancouver for his aide, Peter Puget, in 1792.

<span class="mw-page-title-main">Seagrass meadow</span> Underwater ecosystem

A seagrass meadow or seagrass bed is an underwater ecosystem formed by seagrasses. Seagrasses are marine (saltwater) plants found in shallow coastal waters and in the brackish waters of estuaries. Seagrasses are flowering plants with stems and long green, grass-like leaves. They produce seeds and pollen and have roots and rhizomes which anchor them in seafloor sand.

<i>Phyllospadix scouleri</i> Species of aquatic plant

Phyllospadix scouleri, or Scouler's surfgrass, is a flowering marine plant in the family Zosteraceae. It is native to the coastline of western North America from the Alaskan panhandle to Baja California.

Lottia alveus, the eelgrass limpet or bowl limpet, was a species of sea snail or small limpet, a marine gastropod mollusk in the family Lottiidae, the Lottia limpets, a genus of true limpets. This species lived in the western Atlantic Ocean.

<i>Lacuna vincta</i> Species of gastropod

Lacuna vincta, commonly known as northern lacuna, wide lacuna, northern chink shell, or banded chink shell, is a species of sea snail, a marine gastropod mollusk in the family Littorinidae, the winkles or periwinkles. It is found intertidally and in shallow waters in both the northern Atlantic Ocean and the northern Pacific Ocean. It is a herbivore, feeding on seaweed and diatoms with its toothed radula.

<i>Thalassia testudinum</i> Species of aquatic plant

Thalassia testudinum, commonly known as turtlegrass, is a species of marine seagrass. It forms meadows in shallow sandy or muddy locations in the Caribbean Sea and the Gulf of Mexico. Turtle grass and other seagrasses form meadows which are important habitats and feeding grounds. The grass is eaten by turtles and herbivorous fish, supports many epiphytes, and provides habitat for juvenile fish and many invertebrate taxa.

<i>Zostera marina</i> Species of aquatic plant

Zostera marina is a flowering vascular plant species as one of many kinds of seagrass, with this species known primarily by the English name of eelgrass with seawrack much less used, and refers to the plant after breaking loose from the submerged wetland soil, and drifting free with ocean current and waves to a coast seashore. It is a saline soft-sediment submerged plant native to marine environments on the coastlines of northern latitudes from subtropical to subpolar regions of North America and Eurasia.

<i>Cymodocea nodosa</i> Species of plant in the family Cymodoceaceae

Cymodocea nodosa is a species of seagrass in the family Cymodoceaceae and is sometimes known as little Neptune grass. As a seagrass, it is restricted to growing underwater and is found in shallow parts of the Mediterranean Sea and certain adjoining areas of the Atlantic Ocean.

<i>Zostera noltii</i> Species of plant

Zostera noltii is a species of seagrass known by the common name dwarf eelgrass. It is found in shallow coastal waters in north western Europe, the Mediterranean Sea, Black Sea, Caspian Sea and Aral Sea and on islands in the Atlantic off the coast of northwest Africa. It is an important part of the intertidal and shallow subtidal ecosystems of estuaries, bays and lagoons.

<i>Halodule uninervis</i> Species of plant in the family Cymodoceaceae

Halodule uninervis is a species of seagrass in the family Cymodoceaceae. It is native to the western Pacific and Indian Oceans. Common names include narrowleaf seagrass in English and a'shab bahriya in Arabic.

Zostera novazelandica Setchell is a species of seagrass in the family Zosteraceae found on the shores of New Zealand. It is regarded as a distinct species by some authors but considered as a synonym of Zostera muelleri Irmisch ex Ascherson by others. The Maori names for Zostera novazelandica are karepō, nana, rehia, and rimurehia.

Zostera capensis is a species of dwarf eelgrass growing along the shores of the Indian and Atlantic oceans on the African coast. Its range extends from southern Kenya, through Tanzania, Mozambique, Madagascar, and South Africa up to Angola. This species is the dominant seagrass species in South Africa, occurring as fragmented populations along the coast and occupying subtidal and intertidal habitats in shallow bays, estuaries and lagoons. The two largest meadows in South Africa are present in the Knysna lagoon and Berg river estuary. When last mapped in 2007, Zostera capensis cover in the Berg river estuary was estimated at 206 hectares, while in 2019 the Knysna lagoon was mapped at 316 hectares. Further north in its distribution, Maputo bay in Mozambique is an important habitat for this species, containing approximately 4016 hectares of mixed Zostera capensis and Halodule wrightii on muddy flats. Over its total distribution, this species is estimated to occupy less than 2000 km².

<i>Zostera muelleri</i> Species of plant in the family Zosteraceae

Zostera muelleri is a southern hemisphere temperate species of seagrass native to the seacoasts of South Australia, Victoria and Tasmania. and New Zealand. Today, Zostera muelleri can be found in regions of Australia, New Zealand, and Papua New Guinea, as well as areas of the eastern Indian Ocean, and the southwest and western central Pacific Ocean. Zostera muelleri is a marine angiosperm, and is commonly referred to as eelgrass or garweed. It is a fast growing and readily colonizing species that serves as a feeding ground for wading birds and aquatic animals, and a breeding ground for juvenile fish and shrimp species.

<i>Clithon oualaniense</i> Species of gastropod

Clithon oualaniense is a species of brackish water snail with an operculum, a nerite. It is an aquatic gastropod mollusk in the family Neritidae, the nerites.

<i>Arcuatula senhousia</i> Species of mollusc

Arcuatula senhousia, commonly known as the Asian date mussel, Asian mussel or bag mussel, is a small saltwater mussel, a marine bivalve mollusk species in the family Mytilidae, the mussels. Other common names for this species include: the Japanese mussel, Senhouse's mussel, the green mussel, and the green bagmussel. It is harvested for human consumption in China.

<i>Electra posidoniae</i> Species of bryozoan (marine moss animal)

Electra posidoniae is a species of bryozoan in the family Electridae. It is endemic to the Mediterranean Sea, and is commonly known as the Neptune-grass bryozoan because it is exclusively found growing on seagrasses, usually on Neptune grass, but occasionally on eelgrass.

References

  1. 1 2 3 Short, F.T.; Carruthers, T.J.R.; Waycott, M.; Kendrick, G.A.; Fourqurean, J.W.; Callabine, A.; Kenworthy, W.J.; Dennison, W.C. (2010). "Zostera japonica". IUCN Red List of Threatened Species . 2010: e.T173348A6996472. doi: 10.2305/IUCN.UK.2010-3.RLTS.T173348A6996472.en . Retrieved 19 November 2021.
  2. 1 2 "Zostera japonica Asch. & Graebn". Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. n.d. Retrieved September 27, 2020.
  3. The Plant List
  4. USDA, NRCS (n.d.). "Nanozostera japonica". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 17 July 2015.
  5. Heinrich Gustav Adolf Engler. 1907. Das Pflanzenreich 31(IV. 11): 32. Zostera japonica
  6. Hartog, Cornelis den. 1970. Verhandelingen der Koninklijke Nederlandsche Akademie van Wetenschappen. Afdeeling Natuurkunde, Sectie 2. Amsterdam 59(1): 74.; Sea-Grasses of the World, Zostera americana
  7. Tomlinson, Philip Barry & Posluszny, Usher. 2001. Taxon 50(2): 432, Nanozostera americana and Nanozostera japonica
  8. 1 2 Pederson, Judith (2012). Marine Bioinvasions: Patterns, Processes and Perspectives. Springer Science & Business Media. pp. 46–51. ISBN   978-94-010-0169-4.
  9. Ching Wai Fong; Shing Yip Lee; Wu, Rudolf (2000). "The effects of epiphytic algae and their grazers on the intertidal seagrass Zostera japonica". Aquatic Botany. 67 (4): 251–261. doi:10.1016/S0304-3770(00)00101-7.
  10. "Non-Native Eelgrass: Zostera japonica". Aquaculture. Washington State Department of Ecology. Retrieved 18 March 2016.