Epilithic diatom communities of selected streams from the Lerma-Chapala Basin, Central Mexico, with the description of two new species
The Lerma-Chapala Basin, in Central Mexico, is geologically heterogeneous, climatically diverse and boasts high biodiversity, lying within two Biodiversity Hotspots, namely Mesoamerica and the Madrean Pine–Oak Woodlands. Epilithon and water samples were collected in the basin from 14 sampling sites...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Pensoft Publishers
2017-10-01
|
| Series: | PhytoKeys |
| Online Access: | https://phytokeys.pensoft.net/articles.php?id=14612 |
| _version_ | 1818444443494121472 |
|---|---|
| author | Demetrio Mora Javier Carmona Regine Jahn Jonas Zimmermann Nélida Abarca |
| author_facet | Demetrio Mora Javier Carmona Regine Jahn Jonas Zimmermann Nélida Abarca |
| author_sort | Demetrio Mora |
| collection | DOAJ |
| description | The Lerma-Chapala Basin, in Central Mexico, is geologically heterogeneous, climatically diverse and boasts high biodiversity, lying within two Biodiversity Hotspots, namely Mesoamerica and the Madrean Pine–Oak Woodlands. Epilithon and water samples were collected in the basin from 14 sampling sites three times each, two sampling campaigns during the rainy season and one in the dry season. A total of 274 infrageneric taxa in 48 genera were recorded. The taxonomic composition observed was dominated by taxa from the genera Nitzschia, Gomphonema, Pinnularia, Navicula, Sellaphora and Eunotia. About a third of the taxa found could not be identified to the species level. From those unidentified morphodemes, two are described as new species, namely Brachysira altepetlensis and Sellaphora queretana. Furthermore, Eolimna rhombica is transferred to Sellaphora. Canonical Correspondence Analysis (CCA) revealed that specific conductivity and pH were the main environmental factors driving the community composition observed. Three groups of samples were identified after the CCA: 1) characterized by acidic waters and low conductivity; 2) with circumneutral waters, low specific conductivity and high temperature and phosphorous concentrations; and 3) characterized by circumneutral waters, high conductivity and low nitrogen concentrations. The indicator value method (IndVal), based on the relative abundance and relative frequency of the most abundant taxa was calculated based on the groups observed in the CCA, identifying the characteristic taxa for each of the three groups. |
| first_indexed | 2024-12-14T19:16:01Z |
| format | Article |
| id | doaj.art-f178356932ae458899f63546f57c5844 |
| institution | Directory Open Access Journal |
| issn | 1314-2011 1314-2003 |
| language | English |
| last_indexed | 2024-12-14T19:16:01Z |
| publishDate | 2017-10-01 |
| publisher | Pensoft Publishers |
| record_format | Article |
| series | PhytoKeys |
| spelling | doaj.art-f178356932ae458899f63546f57c58442022-12-21T22:50:36ZengPensoft PublishersPhytoKeys1314-20111314-20032017-10-0188396910.3897/phytokeys.88.1461214612Epilithic diatom communities of selected streams from the Lerma-Chapala Basin, Central Mexico, with the description of two new speciesDemetrio Mora0Javier Carmona1Regine Jahn2Jonas Zimmermann3Nélida Abarca4Freie Universität BerlinUniversidad Nacional Autónoma de MéxicoFreie Universität BerlinFreie Universität BerlinFreie Universität BerlinThe Lerma-Chapala Basin, in Central Mexico, is geologically heterogeneous, climatically diverse and boasts high biodiversity, lying within two Biodiversity Hotspots, namely Mesoamerica and the Madrean Pine–Oak Woodlands. Epilithon and water samples were collected in the basin from 14 sampling sites three times each, two sampling campaigns during the rainy season and one in the dry season. A total of 274 infrageneric taxa in 48 genera were recorded. The taxonomic composition observed was dominated by taxa from the genera Nitzschia, Gomphonema, Pinnularia, Navicula, Sellaphora and Eunotia. About a third of the taxa found could not be identified to the species level. From those unidentified morphodemes, two are described as new species, namely Brachysira altepetlensis and Sellaphora queretana. Furthermore, Eolimna rhombica is transferred to Sellaphora. Canonical Correspondence Analysis (CCA) revealed that specific conductivity and pH were the main environmental factors driving the community composition observed. Three groups of samples were identified after the CCA: 1) characterized by acidic waters and low conductivity; 2) with circumneutral waters, low specific conductivity and high temperature and phosphorous concentrations; and 3) characterized by circumneutral waters, high conductivity and low nitrogen concentrations. The indicator value method (IndVal), based on the relative abundance and relative frequency of the most abundant taxa was calculated based on the groups observed in the CCA, identifying the characteristic taxa for each of the three groups.https://phytokeys.pensoft.net/articles.php?id=14612 |
| spellingShingle | Demetrio Mora Javier Carmona Regine Jahn Jonas Zimmermann Nélida Abarca Epilithic diatom communities of selected streams from the Lerma-Chapala Basin, Central Mexico, with the description of two new species PhytoKeys |
| title | Epilithic diatom communities of selected streams from the Lerma-Chapala Basin, Central Mexico, with the description of two new species |
| title_full | Epilithic diatom communities of selected streams from the Lerma-Chapala Basin, Central Mexico, with the description of two new species |
| title_fullStr | Epilithic diatom communities of selected streams from the Lerma-Chapala Basin, Central Mexico, with the description of two new species |
| title_full_unstemmed | Epilithic diatom communities of selected streams from the Lerma-Chapala Basin, Central Mexico, with the description of two new species |
| title_short | Epilithic diatom communities of selected streams from the Lerma-Chapala Basin, Central Mexico, with the description of two new species |
| title_sort | epilithic diatom communities of selected streams from the lerma chapala basin central mexico with the description of two new species |
| url | https://phytokeys.pensoft.net/articles.php?id=14612 |
| work_keys_str_mv | AT demetriomora epilithicdiatomcommunitiesofselectedstreamsfromthelermachapalabasincentralmexicowiththedescriptionoftwonewspecies AT javiercarmona epilithicdiatomcommunitiesofselectedstreamsfromthelermachapalabasincentralmexicowiththedescriptionoftwonewspecies AT reginejahn epilithicdiatomcommunitiesofselectedstreamsfromthelermachapalabasincentralmexicowiththedescriptionoftwonewspecies AT jonaszimmermann epilithicdiatomcommunitiesofselectedstreamsfromthelermachapalabasincentralmexicowiththedescriptionoftwonewspecies AT nelidaabarca epilithicdiatomcommunitiesofselectedstreamsfromthelermachapalabasincentralmexicowiththedescriptionoftwonewspecies |