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Bibliographic Details
Main Author:	José Rojas Moreno
Format:	Artículo científico
Language:	es
Published:	Instituto de Ecología, A.C. 1995
Subjects:	Biología
Online Access:	https://www.redalyc.org/articulo.oa?id=57403101
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Flora y vegetación acuáticas del Lago de Cuitzeo, Michoacán, México José Rojas Moreno Alejandro Novelo Retana Biología En este trabajo se describen la flora y la vegetación acuáticas del Lago de Cuitzeo. La considerable extensión del lago, su poca profundidad y el gran número de manantiales, determinaronuna alta diversidad de hábitats propicios para el desarrollo de diversas formas de vida de plantasacuáticas y subacuáticas. El Lago de Cuitzeo tiene una riqueza florística sorprendentemente alta, representada por 40 familias, 70 géneros y 92 especies, de estas últimas 25 fueron acuáticas estrictas, 30 subacuáticas y el resto consiste de plantas tolerantes. Las hidrófitas preponderantes son las enraizadas emergentes dominadas por Typha, Scirpus, Cyperus, Eleocharis y Phragmites. De las enraizadas sumergidas, Potamogeton pectinatus es el elemento que cubre más de la mitad de la parte oriental del lago, asociado a una alga del género Chara. El largo período de sequía, la alta evaporación y la concentración de sales en el agua y en el sedimento, son algunos de los factores que limitanel crecimiento de la vegetación acuática en casi todo el lago, especialmente en la parte occidentaly en el centro. De seguir la progresiva pérdida en la captación de agua, se pone en peligro el futurodel lago y la flora y fauna que lo habitan. 1995 artículo científico 0187-7151 https://www.redalyc.org/articulo.oa?id=57403101 es http://www.redalyc.org/revista.oa?id=574 Acta Botanica Mexicana application/pdf Instituto de Ecología, A.C. Acta Botanica Mexicana (México) Num.31

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// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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