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Delesseria Sanguinea
''Delesseria sanguinea'' is a red marine seaweed. Description ''Delesseria sanguinea'' is a common and bright red perennial alga with flat leaf-like red blades rising from a discoid holdfast. The blades are monostromatic, that is composed of a layers of single cells, and can grow to 25 cm long. Each blade rises from a cylindrical stipe, the stalk-like part, which branches only at near the base. Each blade may 8 cm wide and show a clear midrib with lateral veins. The tips of the blades are rounded.Maggs, C.A. and Hommersand, M.H.1993. ''Seaweeds of the British Isles Volume 1 Rhodphyta Part 3A Ceramiales.'' HMSO Bunker,F.St.D., Brodie, J.A., Maggs, C.M. and Bunker, A.R. 2017. ''Seaweeds of Britain and Ireland Second edition.'' Wild Nature Press, Plymouth, UK Other similar algae include: ''Apoglossum ruscifolium'', ''Hypoglossum hypoglossoides'' and ''Membranoptera alata'' all of which are much smaller. ''Phycodrys rubens'' is of comparable size but can be easily distingu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alga
Algae ( , ; : alga ) are any of a large and diverse group of photosynthetic, eukaryotic organisms. The name is an informal term for a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular microalgae, such as '' Chlorella'', '' Prototheca'' and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga which may grow up to in length. Most are aquatic and lack many of the distinct cell and tissue types, such as stomata, xylem and phloem that are found in land plants. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the '' Charophyta'', a division of green algae which includes, for example, '' Spirogyra'' and stoneworts. Algae that are carried by water are plankton, specifically phytoplankton. Algae constitute a polyphyletic group since they do not include a common ancestor, and although their plastids seem to have a single or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holdfast (biology)
A holdfast is a root-like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, benthic cnidarians, and sponges, to the substrate. Holdfasts vary in shape and form depending on both the species and the substrate type. The holdfasts of organisms that live in muddy substrates often have complex tangles of root-like growths. These projections are called haptera and similar structures of the same name are found on lichens. The holdfasts of organisms that live in sandy substrates are bulb-like and very flexible, such as those of sea pens, thus permitting the organism to pull the entire body into the substrate when the holdfast is contracted. The holdfasts of organisms that live on smooth surfaces (such as the surface of a boulder) have flattened bases which adhere to the surface. The organism derives no nutrition from this intimate contact with the substrate, as the process of liberating nutrients from the substrate requir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apoglossum Ruscifolium
''Apoglossum ruscifolium'' is a small red marine seaweed. Description ''Apoglossum ruscifolium'' has branched monostromic blades growing to 10 cm long.Maggs,C.A. and Hommersand, M.H.1993 ''Seaweeds of the British Isles Volume 1 Rhodophyta Part 3A Ceramiales.'' The Natural History Museum, London The axis branches with primary blades reaching 10 cm long and up to 0.8 cm wide, each with a clear midrib and pointed apices. Lateral veins are microscopic. The species is similar to '' Membranoptera alata'' and '' Hypoglossum hypoglossoides'' but can be clearly distinguished. The branches of ''H. hypoglossoides'' are clearly pointed and the young blades of ''M.alata'' are not pointed and are asymmetric with pincer-like tips. Reproduction Microscopic sori are formed are microscopic and are formed on either side of the midrib. Female cystocarps occur singly on the frond.Bunker, F.StP.D., Maggs, C.A., Brodie, J., Bunker, A.R. 2017 ''Seaweeds of Britain and Ireland.'' Second Edition. Wild ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypoglossum Hypoglossoides
''Hypoglossum hypoglossoides'', known as under tongue weed, is a small red marine alga in the family Delesseriaceae. Description ''Hypoglossum hypoglossoides'' is a small red alga growing as monostromatic blades in tufts to a length of 30 cm and 0.8 cm wide. The lateral branches grow as blades which, like the primary blade, has a midrib. All the blades have a lanceolate or acute apices. All the blades lack lateral veins. Maggs, C.A. and Hommersand, M.H. 1993 ''Seaweeds of the British Isles Volume 1 Rhodophyta Part 3A Ceramiales.'' The Natural History Museum, London Bunker,B F.StP.D, Brodie, J.A., Maggs, C.A. and Bunker, A.R. 2017. ''Seaweeds of Britain and Ireland. Second Edition.'' Wild Nature Press, Plymouth, UK Reproduction The plants are dioecious. Spermatangial sori are formed on the blades on either side of the midrib. Cystocarps develop singly on the blades. Habitat Found in the littoral and sublittoral on rock or epiphytically An epiphyte is an organism that grows ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Membranoptera Alata
''Membranoptera alata'' is a small red alga in the Rhodophyta. Description ''Membranoptera alata'' is a small red marine alga growing to a length of no more than 20 cm. Its fronds are up to 2.4 mm wide and monostromatic, that is formed of a thin layer of cells,Maggs, C.A. and Hommersand, M.H. 1993. ''Seaweeds of the British Isles, Volume 1 Rhodopyta Part 3A Ceramiales.'' The Natural History Museum, London narrow and branching in one plane. A midrib runs along the center of the branches with fine microscopic veins from the midrib to the margins. The tips of the young branches are asymmetric, incurved and blunt, not pointed.Bunker, F.StP.D., Brodie, J.A., Maggs, C.A. and Bunker, A.R.2017 ''Seaweeds of Britain and Ireland. Second Edition''. Wild Nature Press, Plymouth.UK Two other algae are similar: ''Apoglossum ruscifolium'' has blunt tips to the branches while ''Hypoglossum hypoglossoides'' has pointed tips, further ''A. ruscifolium'' has symmetrical apices unlike th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phycodrys Rubens
''Phycodrys rubens'' is a red marine alga of up to 30 cm long. Description ''Phycodrys rubens'' is seaweed which is perennial and can grow to 30 cm long and is strongly red in colour.Bunker, F,.StP.D., Brodie, J.A., Maggs, C.A. and Bunker, .R.2017. ''Seaweeds of Britain and Ireland.'' Second Edition. Wild Nature Press, Plymouth, UK It grows with flat leaf-like blades which are monostromatic, that is composed of a single flat layer of cells and can grow 3 cm wide. These blades can become 3 cm wide and show a clear mid-rib. The blades have a ruffled margin with veins growing out from the central mid-rib with paired lateral veins. The plants grow from a small disk holdfast with an axis to the blades.Maggs, C.A. and Hommersand, M.H. 1993. ''Seaweeds of the British Isles. Volume 1 Rhodophyta Part 3A Ceramiales.'' The Natural History Museum London. Dickinson, C.I. 1963. ''British Seaweeds.'' The Kew Series. Eyre & Spottiswoode The algae are somewhat similar to '' D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ireland
Ireland ( ; ga, Éire ; Ulster Scots dialect, Ulster-Scots: ) is an island in the Atlantic Ocean, North Atlantic Ocean, in Northwestern Europe, north-western Europe. It is separated from Great Britain to its east by the North Channel (Great Britain and Ireland), North Channel, the Irish Sea, and St George's Channel. Ireland is the List of islands of the British Isles, second-largest island of the British Isles, the List of European islands by area, third-largest in Europe, and the List of islands by area, twentieth-largest on Earth. Geopolitically, Ireland is divided between the Republic of Ireland (officially Names of the Irish state, named Ireland), which covers five-sixths of the island, and Northern Ireland, which is part of the United Kingdom. As of 2022, the Irish population analysis, population of the entire island is just over 7 million, with 5.1 million living in the Republic of Ireland and 1.9 million in Northern Ireland, ranking it the List of European islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Britain
Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is dominated by a maritime climate with narrow temperature differences between seasons. The 60% smaller island of Ireland is to the west—these islands, along with over 1,000 smaller surrounding islands and named substantial rocks, form the British Isles archipelago. Connected to mainland Europe until 9,000 years ago by a landbridge now known as Doggerland, Great Britain has been inhabited by modern humans for around 30,000 years. In 2011, it had a population of about , making it the world's third-most-populous island after Java in Indonesia and Honshu in Japan. The term "Great Britain" is often used to refer to England, Scotland and Wales, including their component adjoining islands. Great Britain and Northern Ireland now const ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isle Of Man
) , anthem = " O Land of Our Birth" , image = Isle of Man by Sentinel-2.jpg , image_map = Europe-Isle_of_Man.svg , mapsize = , map_alt = Location of the Isle of Man in Europe , map_caption = Location of the Isle of Man (green) in Europe (dark grey) , subdivision_type = Sovereign state , subdivision_name = United Kingdom , established_title = Norse control , established_date = 9th century , established_title2 = Scottish control , established_date2 = 2 July 1266 , established_title3 = English control , established_date3 = 1399 , established_title4 = Revested into British Crown , established_date4 = 10 May 1765 , official_languages = , capital = Douglas , coordinates = , demonym = Manx; Manxman (plural, Manxmen); Manxwoman (plural, Manxwomen) , ethnic_groups = , ethnic_groups_year = 2021 , ethnic_groups_ref = Official census statistics provided by Statistics Isle of Man, Isle of Man Government: * * , religion = , religion_year = 2021 , religi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Channel Islands
The Channel Islands ( nrf, Îles d'la Manche; french: îles Anglo-Normandes or ''îles de la Manche'') are an archipelago in the English Channel, off the French coast of Normandy. They include two Crown Dependencies: the Bailiwick of Jersey, which is the largest of the islands; and the Bailiwick of Guernsey, consisting of Guernsey, Alderney, Sark, Herm and some smaller islands. They are considered the remnants of the Duchy of Normandy and, although they are not part of the United Kingdom, the UK is responsible for the defence and international relations of the islands. The Crown dependencies are not members of the Commonwealth of Nations, nor have they ever been in the European Union. They have a total population of about , and the bailiwicks' capitals, Saint Helier and Saint Peter Port, have populations of 33,500 and 18,207, respectively. "Channel Islands" is a geographical term, not a political unit. The two bailiwicks have been administered separately since the lat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norway
Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and the archipelago of Svalbard also form part of Norway. Bouvet Island, located in the Subantarctic, is a dependency of Norway; it also lays claims to the Antarctic territories of Peter I Island and Queen Maud Land. The capital and largest city in Norway is Oslo. Norway has a total area of and had a population of 5,425,270 in January 2022. The country shares a long eastern border with Sweden at a length of . It is bordered by Finland and Russia to the northeast and the Skagerrak strait to the south, on the other side of which are Denmark and the United Kingdom. Norway has an extensive coastline, facing the North Atlantic Ocean and the Barents Sea. The maritime influence dominates Norway's climate, with mild lowland temperatures on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iceland
Iceland ( is, Ísland; ) is a Nordic island country in the North Atlantic Ocean and in the Arctic Ocean. Iceland is the most sparsely populated country in Europe. Iceland's capital and largest city is Reykjavík, which (along with its surrounding areas) is home to over 65% of the population. Iceland is the biggest part of the Mid-Atlantic Ridge that rises above sea level, and its central volcanic plateau is erupting almost constantly. The interior consists of a plateau characterised by sand and lava fields, mountains, and glaciers, and many glacial rivers flow to the sea through the lowlands. Iceland is warmed by the Gulf Stream and has a temperate climate, despite a high latitude just outside the Arctic Circle. Its high latitude and marine influence keep summers chilly, and most of its islands have a polar climate. According to the ancient manuscript , the settlement of Iceland began in 874 AD when the Norwegian chieftain Ingólfr Arnarson became the first ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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