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Dettagli Bibliografici
Autore principale:	José Augusto da Silva Santana
Natura:	Artículo científico
Lingua:	pt
Pubblicazione:	Universidade Estadual da Paraíba 2006
Soggetti:	Biología Caatinga Vegetação fitossociologia composição botânica
Accesso online:	https://www.redalyc.org/articulo.oa?id=50060215
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Diversidade e Estrutura Fitossociológica da Caatinga na Estação Ecológica do Seridó-RN José Augusto da Silva Santana Jacob Silva Souto Biología Caatinga Vegetação fitossociologia composição botânica A Caatinga é um bioma com ocorrência restrita ao Brasil, e apesar de sua importância sócioeconômicae de estar submetida há muitas décadas a intensa e predatória exploração de seus recursosnaturais é pouco protegida e estudada. Desse modo, visando aumentar o conhecimento sobre obioma foi realizada a análise fitossociológica do estrato arbóreo-arbustivo da caatinga existente naEstação Ecológica do Seridó, no município de Serra Negra do Norte-RN. Foram amostrados osindivíduos com diâmetro ao nível do solo ≥3 cm e altura total ≥1 m, presentes em 30 parcelas de 200m2, distribuídas na parte sudeste da Estação e com distância entre si superior a 50 m. Registraram-se2.448 indivíduos, distribuídos em 22 espécies, 20 gêneros e 12 famílias. A densidade foi de 4.080indivíduos.ha-1 e a área basal de 17,50 m2.ha-1, enquanto a altura e o diâmetro médios atingiram 2,45m e 6,80 cm, respectivamente. As famílias com maior número de espécies foram Caesalpiniaceaecom cinco e Euphorbiaceae com quatro, enquanto que em relação ao número de indivíduosdestacaram-se Euphorbiaceae com 855, Caesalpiniaceae com 517, Apocynaceae com 375 eMimosaceae com 341. O índice de diversidade H resultou em 2,35 nats.ind-1 e o índice de riquezapara espécies em 2,88. As espécies Caesalpinia pyramidalis Tul. (catingueira), Aspidospermapyrifolium Mart. (pereiro) e Croton sonderianus Müll. Arg. (marmeleiro) foram as três maisimportantes da população, respondendo juntas por 58,66 % do número de indivíduos, 65,19 % daárea basal e 51,85 % do valor de importância. 2006 artículo científico 1519-5228 https://www.redalyc.org/articulo.oa?id=50060215 pt http://www.redalyc.org/revista.oa?id=500 Revista de Biologia e Ciências da Terra application/pdf Universidade Estadual da Paraíba Revista de Biologia e Ciências da Terra (Brasil) Num.2 Vol.6

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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