Diatomeas planctónicas del litoral de Andalucía (España). Planktonic diatoms from the coast of Andalusia (Spain)
DOI:
https://doi.org/10.24310/abm.v36i1.2787Abstract
Español. Se estudian un total de 206 taxones identificados durante el estudio del ciclo anual realizado en las costas de Andalucía a lo largo del año 2000. Destacan, entre las diatomeas céntricas, la subclase Coscinodiscophycidae con 27 taxones y la subclase Chaetocerotophycidae con 28. Entre las pennadas destaca la clase Bacillariophyceae con 76 species. Los géneros que mostraron un mayor número de taxones fueron Chaetoceros, Thalassiosira y Rhizosolenia en el grupo de diatomeas céntricas, mientras que entre las pennadas destacaron los géneros Lyrella, Gyrosigma y Pseudonitzschia. Respecto a su distribución espacial, se han detectado 12 especies exclusivamente atlánticas, mientras que 69 fueron mediterráneas. El resto de taxones presentó una distribución más amplia tanto mediterránea como atlántica. En cuanto a la abundancia celular hemos considerado 119 taxones en la categoría de raros, 57 de habituales y 29 como taxones mayoritarios. Entre los últimos destacaron Hemiaulus sinensis y Eucampia cornuta con carácter marcadamente atlántico, y en la zona mediterránea Cerataulina pelagica y Proboscia alata f. inermes. Las especies más abundantes de todo el litoral andaluz fueron Leptocylindrus minimus, Leptocylindrus danicus, Pseudonitzschia fraudulenta, Skeletonema costatum, Thalassionema nitzschioides, Guinardia striata, Guinardia delicatula y Dactyliosolen phuketensis.
English. In this paper we study 206 taxa found during the annual cycle conducted off the coast of Andalusia during 2000. The most representatives centric diatoms were the subclass Coscinodiscophycidae with 27 taxa and the subclass Chaetocerotophycidae with 28. Among the pennate diatom stand out Bacillariophyceae with 76 species. The Genera that showing the bigger number of taxa were Chaetoceros, Thalassiosira and Rhizosolenia in centric diatoms, whereas in pennate diatoms the Genera Lyrella, Gyrosigma and Pseudonitzschia were dominant. Regarding spatial distribution, 12 species were found exclusively Atlantic, while 69 were Mediterranean. The remaining taxa had a wider distribution both Mediterranean and Atlantic. In terms of cell abundance we considered 119 taxa in the category of rare, 57 taxa in the category of common and 29 as abundant taxa. In the Atlantic area Hemiaulus sinensis and Eucampia cornuta dominated whereas Cerataulina pelagica and Proboscia alata f. inermis characterized the Mediterranean zone. Leptocylindrus minimus, Leptocylindrus danicus, Pseudonitzschia fraudulenta, Skeletonema costatum, Thalassionema nitzschioides, Guinardia striata, Guinardia delicatula, and Dactyliosolen phuketensis were the most representative taxa in the whole Andalusian littoral.
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