View source for Zostera

{{Treatment/ID
|accepted_name=Zostera
|accepted_authority=Linnaeus
|publications={{Treatment/Publication
|title=Sp. Pl.
|place=2: 968. 1753; Gen. Pl. ed. 5; 415, 1754
|year=1754
}}
|common_names=Eel-grass;zostère
|basionyms=
|synonyms=
|hierarchy=Zosteraceae;Zostera
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Zosteraceae]]</div><div class="higher-taxon"><small>genus</small>[[Zostera]]</div></div>
|etymology=Greek zoster, belt
|volume=Volume 22
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs,</b> perennial or rarely annual, rooted in substrate. <b>Roots</b> 5–20, nodal. <b>Leaves</b>: sheath tubular or open, persisting longer than blade, often rupturing with age but not remaining as bundles of woolly fibers; blade entire or slightly denticulate distally; veins 3–11. <b>Generative</b> shoot lateral or terminal. <b>Inflorescences</b>: peduncle partially adnate to stem; spadix lanceolate, enclosed permanently within spathe sheath; staminate and pistillate flowers alternating on same spadix; pistillate spadix without rudimentary staminate flowers. <b>Staminate</b> flowers often subtended by bract. <b>Pistillate</b> flowers without subtending bract, pistil elliptic. <b>Fruits</b> achenelike, ovoid to ellipsoid.</span><!--

-->{{Treatment/Body
|distribution=Temperate waters worldwide.
|discussion=<p><i>Zostera</i>, especially <i>Z. marina</i>, is very possibly the most important taxon of marine angiosperms in the Northern Hemisphere. Much has been written about the biology and economic importance of <i>Z. marina</i>, and the literature was summarized by C. den Hartog (1970). The species functions in sediment deposition, substrate stabilization, as substrate for epiphytic algae and micro-invertebrates, and as nursery grounds for many species of economically important marine vertebrates and macro-invertebrates. In addition to those functions, the species once was the principal material for the Dutch dikes, and it has been utilized as packing material and as stuffing for mattresses and cushions. Finally, the species has been used for food and recreation by the Seri tribe of Native Americans (R. Felger and M. B. Moser 1973).</p><!--
--><p>During the 1930s, <i>Zostera marina</i> of North America began to develop large brown spots on the leaves and rhizomes. Slowly the plants of a population died, the dieback eventually spreading throughout the North Atlantic, until there was very little eel-grass remaining there. This slow dieback of eel-grass became known as "wasting disease." Biologists began studying the disease and eventually determined the causative agent to be Labyrinthula zosterae, a slime mold. That dieback resulted in huge decreases in the population sizes of most fauna that depended on <i>Zostera</i>. Slowly, eel-grass returned to most areas that it had occupied prior to the disease.</p><!--
--><p>Species 12 (2 in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=harrison1979a
|text=Harrison, P. G. 1979. Reproductive strategies in intertidal populations of two co-occurring seagrasses (Zostera spp.). Canad. J. Bot. 57: 2635--2638.
}}{{Treatment/Reference
|id=nomme1991a
|text=Nomme, K. M. and P. G. Harrison. 1991. A multivariate comparison of the seagrasses Zostera marina and Zostera japonica in monospecific versus mixed populations. Canad. J. Bot. 69: 1984--1990.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaf sheath tubular, without membranous flaps, rupturing with age; bract absent or rarely 1 subtending lowermost staminate flower.
|[[Zostera marina|Zostera marina]]
|-id=key-0-1
|1
|Leaf sheath open, with 2 membranous flaps, persisting without rupturing; bract subtending each staminate flower.
|[[Zostera japonica|Zostera japonica]]
|}
</div></div><!--

-->{{#Taxon:
name=Zostera
|authority=Linnaeus
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Zosteraceae
|distribution=Temperate waters worldwide.
|reference=harrison1979a;nomme1991a
|publication title=Sp. Pl.
|publication year=1754
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V22/V22_608.xml
|genus=Zostera
}}<!--

-->[[Category:Treatment]][[Category:Zosteraceae]]