...The production volume of seaweed and seagrass is 25 to 85 tons per hectare, and it is known that in shallow coastal areas and small bays, more than two-thirds of the primary production is due to seaweed (sea grass), but in general marine areas, the majority of primary production is due to photosynthesis of phytoplankton. In coral reefs, the production volume of zooxanthella (zooxanthellae) that live symbiotically in the fleshy parts of coral worms and microalgae that attach to the surface of dead coral is extremely high, and is known as an example of an abnormally high production volume even in the ocean. The organic matter produced by plants (producers) is eaten by primary consumers, who are herbivores. ... From [Coral Reef] …Figure 3 shows the microtopography of the current coral reef. [Nobuyuki Hori] From [Tri-calyx (Chronicle shell)]...The mantle that covers the body is well developed and extends outside the shell. Zooxanthella symbiotically lives within the tissue, and the color varies depending on the species of giant clam, from dark blue to brown. Giant clams also eat plankton, but when the brown algae are exposed to sunlight, they assimilate carbon dioxide, which produces oxygen and glucose, which are then provided to the giant clam. From Octopus Jellyfish...The cap is brownish in color with scattered white spots, but there are also colorless and indigo-colored individuals. The brown color is not the body color of the jellyfish, but is due to the fact that countless lower algae called Zooxanthella live symbiotically inside the jellyfish's body. This algae enters the jellyfish's body when it is in the polyp stage, which is about 2 mm tall, and enters the stomach cavity through the polyp's mouth, then moves into the tissues and grows as the water temperature rises. *Some of the terminology that mentions "zooxanthella" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…海藻や海草による生産量は,1ha当り25~85tにもなり,浅い沿岸域や小湾では,基礎生産の3分の2以上がこれら海藻(海草)による場合も知られているが,一般の海域では,基礎生産の大部分は,植物プランクトンの光合成に負っている。サンゴ礁では,サンゴ虫の肉質部に共生するゾーキサンテラzooxanthella(褐虫藻類)や,死んだサンゴ表面に付着した微小藻類による生産量が著しく大きく,海の中でも異常に高い例として知られている。 植物(生産者)によって生産された有機物は,植物食である一次消費者に食べられる。… 【サンゴ礁(珊瑚礁)】より…図3に現成サンゴ礁の微地形を示す。【堀 信行】 【シャコガイ(硨磲貝)】より…体を包む外套(がいとう)はよく発達しており,それを殻の外にのび出している。その組織内に褐虫藻Zooxanthellaが共生していて,濃紺や褐色などシャコガイの種類によっていろいろな色になっている。シャコガイはプランクトンも食べるが,また褐色藻が日光にあたると炭酸同化作用を行い,それでできる酸素とブドウ糖などをシャコに提供する。… 【タコクラゲ】より…かさの色は茶褐色で,白い斑点が散在しているが,無色のものや,藍色の個体もある。茶褐色の色はクラゲの地色ではなく,ゾーキサンテラZooxanthellaという下等な藻類がクラゲの体内に無数に共生しているためである。この藻類がクラゲの体内に入るのは,高さ2mmくらいのポリプの時代であって,ポリプの口から胃腔内へ入り,その後組織へ移って,水温があがるに従って増殖する。… ※「zooxanthella」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
<<: Zoppo, M. (English spelling) ZoppoM
Aerodynamics is the process by which the airfoil ...
Seclusion in a shrine or temple and praying to th...
A port city on the south shore of Manila Bay in t...
Among developing countries, least developed count...
…The bamboo grass moth Balataea funeralis is not ...
Around 1935, in connection with the so-called stud...
?-1913 A national hero who resisted the invasion o...
A glaze made with plant ash as a solvent. It is al...
…They are named after the place or species. Canad...
From the Persian word qarban, meaning caravan. A t...
An insect belonging to the order Hemiptera, subor...
…Abbreviation for Japanese Industrial Standard. B...
...At this time, branch families such as Okazaki ...
The history of Chinese astronomy can be seen as th...
A city in southern Saitama prefecture. It was inco...