tag:blogger.com,1999:blog-37826618266105732502024-02-20T11:35:13.383-08:00Estudiem CienciesJoan Anglada PaituvíJoanhttp://www.blogger.com/profile/11391221151221982788noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-3782661826610573250.post-79505790995888170202010-11-24T01:25:00.000-08:002010-11-24T01:25:03.638-08:00Les abelles (audio)<object width='440' height='85'><param name='movie' value='http://uri.podomatic.com/swf/joeplayer_v11.swf'></param><param name='flashvars' value='jsonLocation=http%3A%2F%2Furi.podomatic.com%2Fentry%2Fembed_params%2F2010-11-24T01_03_06-08_00%3Ffoo%3Dbar%26color%3Df8ae06%26autoPlay%3Dtrue%26width%3D440%26height%3D85'></param><param name='allowFullScreen' value='true'></param><param name='allowscriptaccess' value='always'></param><embed src='http://uri.podomatic.com/swf/joeplayer_v11.swf' flashvars='jsonLocation=http%3A%2F%2Furi.podomatic.com%2Fentry%2Fembed_params%2F2010-11-24T01_03_06-08_00%3Ffoo%3Dbar%26color%3Df8ae06%26autoPlay%3Dtrue%26width%3D440%26height%3D85' type='application/x-shockwave-flash' allowscriptaccess='always' allowfullscreen='true' width='440' height='85'></embed></object>Joanhttp://www.blogger.com/profile/11391221151221982788noreply@blogger.com0tag:blogger.com,1999:blog-3782661826610573250.post-18561974277082441062010-11-09T00:14:00.000-08:002010-11-09T00:14:17.492-08:00Posidònia<div align="CENTER" style="font-style: normal; margin-bottom: 0cm;"><br />
</div><div align="CENTER" style="font-style: normal; margin-bottom: 0cm;"><a href="http://www.blogger.com/post-create.g?blogID=3782661826610573250" name="internal-source-marker_0.04518815445142221"></a> <span style="color: lime;"><span style="font-family: Arial;"><span style="font-size: x-large;"><u><b><span style="background: none repeat scroll 0% 0% transparent;">LA POSIDÒNIA</span></b></u></span></span></span></div><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">La “posidònia ocèanica” és una planta endèmica de la Mediterrània amb arrels , tija , fulles , flors i fruits que viu sota l’aigua entre la superfície i una fondària màxima d’uns 40 m .</span></span></span></span></span></span></span><br />
<a href="http://www.eivissaweb.com/reportatges/espais-naturals/praderies-de-posid%C3%B2nia/"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://www.eivissaweb.com/reportatges/espais-naturals/praderies-de-posidònia/</span></span></u></span></span></span></span></a><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% transparent;"> </span></span></span><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">Normalment la trobem en trobem en forma de praderia , recobrint importants superfícies del fons , marí . Les tijes són subterrànies i poden arribar a gruixos d’uns 10 a 20 centímetres i recobreixen el fons en forma vertical o horitzontal .</span></span></span></span></span></span></span><br />
<a href="http://www.cibsub.com/bioespecia-posid%C3%B2nia-oceanica-27622/"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://www.cibsub.com/bioespecia-posidònia-oceanica-27622/</span></span></u></span></span></span></span></a><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">A Catalunya la posidònia es coneix amb el nom d’alga dels vidries. Abans de les platges agafaven las fulles seques de la posidònia i la feien servir per embolicar i protegir les peces que fabrican els vidres de cada transport.</span></span></span></span></span></span></span><br />
<a href="https://docs.google.com/document/edit?id=1KchjLv1JYFz6TMwnCKLU29LpCsGtK2047cgtHuhkYzI&hl=en&pli=1"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">htttp://elblocdecienciesnaturals.blogspot.com/2010/03/posidònia.html</span></span></u></span></span></span></span></a><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% transparent;"> </span></span></span><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">És una planta de color verd fosc, amb fulles llargues en forma de cinta que poden arribar a 2m de llarg i que s’agrupen en feixos de 5 a 7 fulles.Al començar la tardor la posidònia inicia la floració. Cadascuna de les flors està dotada d’un ovari envoltat de 3 estams.</span></span></span></span></span></span></span><br />
<a href="http://sauce.pntic.mec.es/-btorre1/posidonia/postreball.html"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://sauce.pntic.mec.es/-btorre1/posidonia/postreball.html</span></span></u></span></span></span></span></a><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% transparent;"> </span></span></span><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">Aquesta planta ocupa el 0,07% de l’ecosistema marí del mediterrani, fa uns 100 milions d’anys era terrestre que va colonitzar el mar. Per fer arribar l’oxigen de les fulles a les arrels te uns conductes que també li serveix per mantenir-se vertical a la llum. La fondària en que és pot trobar la posidònia depèn de la quantitat de llum, de la transparència de les aigües i dels corrents del mar,a la posidònia l’hi agraden les aigües calmades i està a una fondària des de pocs metres fins a 50metres de profunditat. La posidònia per instal·lar-se a un lloc on només hi ha sorra han de passar 600anys, la recuperació a escala humana és irreversible, i com a molt poden tenir una vida de 4000anys.</span></span></span></span></span></span></span><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">Les praderies de posidònia tenen un creixement vertical i horitzontal. El vertical és dona quan el nivell de la sorra puja a causa de l’aport d’aquesta de manera natural, ja sigui per la rotura de roques, cornets i altres closques. L’horitzontal va tapissant el fons de sorra. </span></span></span></span></span></span></span><br />
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<a href="http://www.pescandoenmallorca.com/archives/1404"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://www.pescandoenmallorca.com/archives/1404</span></span></u></span></span></span></span></a><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% transparent;"> </span></span></span><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">Les praderies de Posidònia són la comunitat marina més important del</span></span></span></span></span></span></span><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% rgb(255, 153, 0);"> </span></span></span><span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% rgb(255, 153, 0);">litoral</span></span></span></span></span></span></span><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% transparent;"> </span></span></span><span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">Mediterrani. Això és degut a la seva influència en l’acosistema i els beneficis que reporta. </span></span></span></span></span></span></span><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">Generen a la sorra de les platges. Les restes d’algues i esquelets dels organismes que viuen en ella (mol·luscs,foraminifers, brizous,equinoderms...) són erosionats i produeixen sorra biògena, que la praderia exporta a les platges. Si passegem per la platja i obs</span></span></span></span></span></span></span><span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% rgb(255, 153, 0);">ervem d prop la sorra veurem aquest fet i apreciarem el seu tactefi. Un metr quadrat de Posidònia pot generar a l’any entre 10 i 100 gr de sorra</span></span></span></span></span></span></span><span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">.</span></span></span></span></span></span></span><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">Formen esculls naturals que actuen com autèntiques barreres de protecció de les platges. Pòden arribar a 4m d’alçada. Aquests esculls</span></span></span></span></span></span></span><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% rgb(255, 153, 0);"> </span></span></span><span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% rgb(255, 153, 0);">proteigeixenl</span></span></span></span></span></span></span><span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">a costa de les onades afavorint la formació de les platges. El seu efecte és similar de corals.</span></span></span></span></span></span></span><br />
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<a href="http://sauce.pntic.mec.es/-btorre1/Posidonia/posimport%E0ncia.html"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://sauce.pntic.mec.es/-btorre1/Posidonia/posimport%E0ncia.html</span></span></u></span></span></span></span></a><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% transparent;"> </span></span></span><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">Les praderies de posidonia són la principal comunitat del litoral mediterrani degut als seus alts nivells de productivitat, elevada biodiversitat i importància en la protecciò i estabilitat de la línia de costa. En aquest sentit, les praderies constitueixen un ecosistema madur, atesala seva capacitat per modificar les condicions ambientals dels llocs on s’instaura: atrapant el sediment i contribuint, així, a la neteja de l’aigua, oxigenat les aigües durant la tardor, l’hivern i sobratot a la primavera, atraient nombroses espècies animal i vegetals que constituiran la comunitat posidonícola.</span></span></span></span></span></span></span><br />
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<a href="http://lifeposidonia.caib.es/user/index_ct.htm"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://lifeposidonia.caib.es/user/index_ct.htm</span></span></u></span></span></span></span></a><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% transparent;"> </span></span></span><br />
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<span style="color: black;"><span style="text-decoration: none;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">BIBLIOGRAFIA</span></span></span></span></span></span></span><br />
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<a href="http://www.aweb.com/reportages/espais-naturals/praderies-de-posidonia/"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://www.aweb.com/reportages/espais-naturals/praderies-de-posidonia/</span></span></u></span></span></span></span></a><br />
<a href="http://www.cibsub.com/bioese-posidonia-oceanica-27622"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://www.cibsub.com/bioese-posidonia-oceanica-27622</span></span></u></span></span></span></span></a><br />
<a href="http://elbocdecienciesnaturalsspot.com/2010/03/posidonia.html"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://elbocdecienciesnaturalsspot.com/2010/03/posidonia.html</span></span></u></span></span></span></span></a><br />
<a href="http://saucpntic.mec.es/-btorre1/posidonia/postreball.html"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://saucpntic.mec.es/-btorre1/posidonia/postreball.html</span></span></u></span></span></span></span></a><br />
<a href="http://sauce.pntic.mec.es/-btorre1/posidonia/posimsport%E0ncia.html"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://sauce.pntic.mec.es/-btorre1/posidonia/posimsport%E0ncia.html</span></span></u></span></span></span></span></a><br />
<a href="http://idonia.caib.es/user/index_ct.html"><span style="color: #000099;"><span style="font-family: Arial;"><span style="font-size: x-small;"><span style="font-style: normal;"><u><span style="font-weight: normal;"><span style="background: none repeat scroll 0% 0% transparent;">http://idonia.caib.es/user/index_ct.html</span></span></u></span></span></span></span></a><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% transparent;"> </span></span></span> <br />
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<div align="RIGHT"><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% transparent;">Joan Anglada Paituví </span></span></span> </div><div align="RIGHT"><span style="color: black;"><span style="text-decoration: none;"><span style="background: none repeat scroll 0% 0% transparent;">Nicolas Silva Burgos </span></span></span> </div>Joanhttp://www.blogger.com/profile/11391221151221982788noreply@blogger.com0tag:blogger.com,1999:blog-3782661826610573250.post-58950868418002250332010-11-08T23:44:00.000-08:002010-11-08T23:44:19.565-08:00Posidònia<a href="http://www.slideshare.net/nicolassilvaburgos/posidonia">http://www.slideshare.net/nicolassilvaburgos/posidonia</a><br />
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Aquí està penjat unes diapoditives del nostre treball de la PosidòniaJoanhttp://www.blogger.com/profile/11391221151221982788noreply@blogger.com0