water net

water net

plant
 alga of the genus Hydrodictyon, sometimes found on the surface of quiet ponds as a free-floating network of multinucleate cells arranged in hexagons or pentagons and up to 20 cm (7.9 inches) in total length. Sexual reproduction is by fusion of similar gametes (isogamy). Asexual reproduction is by motile zoospores, hundreds of them contained in each cell becoming arranged in small netlike structures. When a mature Hydrodictyon net dissociates, each cell liberates a miniature net. Because of its reproductive efficiency, Hydrodictyon proliferates rapidly and is often a problem in ponds, recreational waters, and irrigation canals.

* * *


Universalium. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Water net — Taxobox name = Water net regnum = Plantae divisio = Chlorophyta classis = Chlorophyceae ordo = Chlorococcales familia = Hydrodictyaceae genus = Hydrodictyon subdivision ranks = Species subdivision = * Hydrodictyon africanum * Hydrodictyon indicum …   Wikipedia

  • water net — noun : a freshwater alga of the genus Hydrodictyon …   Useful english dictionary

  • Water polo — is a team water sport. A team consists of six field players and one goalkeeper. The winner of the game is the team that scores more goals. Gameplay involves swimming, players passing the ball while being defended by opponents, and scoring by… …   Wikipedia

  • Water resources management in Pakistan — Water resources= According to the United Nations World Water Development Report, the total actual renewable water resources decreased from 2,961 m³ per capita in 2000 to 1,420 m³ per capita in 2005. [cite journal last = United Nations Educational …   Wikipedia

  • Water supply and sanitation in Saudi Arabia — differs from most other countries in three significant aspects. First, it relies almost exclusively on two sources that are absent in most other countries: desalination and fossil water. Second, given the substantial oil wealth of the country,… …   Wikipedia

  • Water efficiency — can be defined as *1) the accomplishment of a function, task, process, or result with the minimal amount of water feasible; *2) an indicator of the relationship between the amount of water required for a particular purpose and the amount of water …   Wikipedia

  • Water supply and sanitation in the United States — is provided by towns and cities, public utilities that span several jurisdictions and rural cooperatives. About 15 million Americans are served by their own wells. Public water supply and sanitation systems are regulated by state level regulatory …   Wikipedia

  • Water supply and sanitation in Ireland — Water supply and sanitation services in Ireland, in contrast to most countries in the world, are provided free of charge to domestic users since 1997. Only non domestic users are billed for these services. The bulk of the costs of service… …   Wikipedia

  • Water skiing — is a sport where an individual (or more than one individual) is pulled behind a motor boat or a cable ski installation on a body of water wearing one or more skis. The surface area of the ski (or skis) keeps the person skimming on the surface of… …   Wikipedia

  • Water supply and sanitation in Cuba — is characterized by a high level of access, but at limited quality of service. A state owned enterprise is in charge or providing services throughout the country within the country s socialist, centrally planned Cuban economic system. Aa a… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”