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Autore principale:	Odilón Sánchez Sánchez
Natura:	Artículo científico
Lingua:	es
Pubblicazione:	Recursos Genéticos Forestales 2007
Soggetti:	Biología Flora sucesión perturbación gremios ecológicos
Accesso online:	https://www.redalyc.org/articulo.oa?id=49790203
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Sommario:

Flora arbórea y caracterización de gremios ecológicos en distintos estados sucesionales de la selva mediana de Quintana Roo Odilón Sánchez Sánchez Mirna Valdez Hernández Gerald A. Islebe Biología Flora sucesión perturbación gremios ecológicos Mediante el estudio florístico de cuatro estados sucesionales de selva mediana en seis sitios de distintas edades (inicial, joven, intermedio y maduro) y distintos tipos de perturbación (incendio y sistema de roza, tumba y quema), se caracterizó a las especies arbóreas en cinco grupos ecológicos. Los grupos identificados incluyen a especies heliófitas (efímeras y durables) y especies esciófitas (parciales y totales), además de un grupo de especies que pertenece tanto a las heliófitas como a las esciófitas 2007 artículo científico 1405-7247 https://www.redalyc.org/articulo.oa?id=49790203 es http://www.redalyc.org/revista.oa?id=497 Foresta Veracruzana application/pdf Recursos Genéticos Forestales Foresta Veracruzana (México) Num.2 Vol.9

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// 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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Environment & details: