Characterization of the high mountain glacial lake complex of Sierra Segundera (NW Zamora, Spain)
The study of high mountain wetlands is of great interest in the Iberian Peninsula since they are unique elements inherited from the last glaciation, and they also have very relevant biocenosis in biogeography and conservation due to their isolation, specificity and singularity. In this work, we desc...
| Published in: | Pirineos |
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| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | Spanish |
| Published: |
Consejo Superior de Investigaciones Científicas
2021
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| Subjects: | |
| Online Access: | https://pirineos.revistas.csic.es/index.php/pirineos/article/view/329 https://doi.org/10.3989/pirineos.2021.176001 |
| Summary: | The study of high mountain wetlands is of great interest in the Iberian Peninsula since they are unique elements inherited from the last glaciation, and they also have very relevant biocenosis in biogeography and conservation due to their isolation, specificity and singularity. In this work, we describe in detail the distribution, morphogenesis and lake typologies present in the Sierra Segundera glacier complex, located mainly at the headwaters of the Tera River (NW of Zamora), upstream of Lake Sanabria. There are 340 aquatic elements catalogued in a drainage network of 258 km over an area of more than 10,600 ha, which drains an annual average of more than 120 hm3 of water. Hydrographic and bathymetric data are included for the 19 largest natural lakes and bogs; located at an altitude of more than 1500 msm. They are inhabited by exceptional biological communities, both micro and macroscopic. Inventories oscillated between 61 and 461 flora and fauna taxa, considered in a wide definition; a minimum of 67% were primary producers. They sketch the global and local pressures in their respective catchments, which in some way compromise their future ecological status within the Natura2000 network, and describe the possible past and current impacts that will negatively affect. El estudio de humedales de alta montaña presenta un gran interés en la Península Ibérica ya que son elementos singulares herencia de la última glaciación, y además albergan biocenosis muy relevantes en biogeografía y conservación por su aislamiento y singularidad. En este trabajo se desarrolla en detalle la distribución, morfogénesis y tipologías lacustres presentes en el complejo glaciar de Sierra Segundera, situado mayoritariamente en la cabecera del río Tera (NO de Zamora), aguas arriba del lago de Sanabria. Se han catalogado 340 elementos acuáticos en una red de drenaje de 258 km sobre una superficie superior a 10.600 ha, que drena un promedio anual de agua superior a 120 hm3. Se incluyen datos hidrográficos y batimétricos de las 19 lagunas y turberas naturales de mayor tamaño, situadas a una altitud superior a 1500 msnm. En ellas habitan singulares comunidades biológicas, micro y macroscópicas. Los inventarios oscilaron entre 61 y 461 taxones de flora y fauna, considerados en sentido amplio; siendo un mínimo de 67% productores primarios. Se esbozan las presiones globales y locales en sus respectivas cuencas, que de alguna manera comprometen en el futuro su estado de conservación dentro de la red Natura2000, y se describen los posibles impactos pasados y actuales que les afectan negativamente. |
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