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dc.contributor.author
Rigterink, Sonja
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Echeverría Galindo, Paula
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Martínez Abarca, Rodrigo
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Massaferro, Julieta
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dc.contributor.author
Hoelzmann, Philipp
dc.contributor.author
Wünnemann, Bernd
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Laug, Andreas
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Pérez, Liseth
dc.contributor.author
Kang, Wengang
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Börner, Nicole
dc.contributor.author
Schwarz, Anja
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Peng, Ping
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Wang, Junbo
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Zhu, Liping
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Schwalb, Antje
dc.date.available
2023-11-01T14:26:03Z
dc.date.issued
2022-07
dc.identifier.citation
Rigterink, Sonja; Echeverría Galindo, Paula; Martínez Abarca, Rodrigo; Massaferro, Julieta; Hoelzmann, Philipp; et al.; Sub-fossil chironomids as indicators of hydrological changes in the shallow and high-altitude lake Shen Co, Tibetan Plateau, over the past two centuries; Cnr Ist Italiano Idrobiologia; Journal of Limnology; 81; 8; 7-2022; 2077-2089
dc.identifier.issn
1129-5767
dc.identifier.uri
http://hdl.handle.net/11336/216772
dc.description.abstract
Understanding climate and monsoonal dynamics on the Tibetan Plateau is crucial, as recent hydrological changes, evidenced by rising lake levels, will be accelerated by current global warming and may alter aquatic habitats and species inventories. This study combines chironomid assemblages with sedimentological, mineralogical and geochemical data of a short sediment core (37.5 cm) from the high-altitude (> 4,733 m asl), saline (9 g L-1) and shallow (~5 m water depth) Shen Co, located in the southern part of the central Tibetan Plateau. The predominantly littoral, species-poor (10 chironomid morphotypes) chironomid assemblages are dominated by salt-tolerant taxa, that are highly sensitive to lake level fluctuations and macrophyte vegetation dynamics, making them ideally suited for tracking lake level changes over time. Results indicate a period (from ca. 1830 to 1921 CE) of drier conditions with low runoff and high evaporation rates in the Shen Co catchment, as indicated by a dominance of low-Mg calcite and dolomite and increased Ca/Fe and Sr/Rb ratios. This resulted in a decline in lake levels, an increase in salinity and the periodic occurrence of desiccation events at the sampling site. The first chironomid morphotype to appear after the dry period is Acricotopus indet. morphotype incurvatus, which indicate still low (<2 m) but rising lake levels after 1921 CE due to increasing runoff and a lower evaporation/precipitation ratio, as reflected by coarser grain size, higher quartz content and increased TN, TOC and Al/Si ratios. A replacement of A. indet. morphotype incurvatus by Procladius is observed as lake level rise continued after 1950 CE. The highest lake level is proposed for the period since 2006 CE. From 1955 to 1960 CE and from 2011 to 2018 CE, the presence of the phytophilic taxon Psectrocladius sordidellus-type supported abundant macrophyte growth. These changes are consistent with climate reconstructions from the northern and central Tibetan Plateau, indicating warmer and wetter climate conditions since the beginning of the 20th century, which have led to an increase in lake level in a number of Tibetan lakes. Our study specifically highlights 1920 and 1950 as years with enhanced precipitation. This can be attributed to the strong, with overlapping multidecadal cycles of Westerlies and monsoon systems. This study demonstrates the significance of studying small, shallow lakes, as they frequently contain aquatic communities that respond more rapidly to the changes in the lake system. In addition, this study expands our understanding of the ecology of Tibetan chironomid morphotypes, highlighting this group’s potential as paleolimnological proxies for investigating past environmental and climatic changes.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Cnr Ist Italiano Idrobiologia
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc/2.5/ar/
dc.subject
CHIRONOMIDS
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HYDROLOGICAL CHANGES
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TIBETAN PLATEAU
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PALEOECOLOGY
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Geociencias multidisciplinaria
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Sub-fossil chironomids as indicators of hydrological changes in the shallow and high-altitude lake Shen Co, Tibetan Plateau, over the past two centuries
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-10-30T16:14:58Z
dc.identifier.eissn
1723-8633
dc.journal.volume
81
dc.journal.number
8
dc.journal.pagination
2077-2089
dc.journal.pais
Italia
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dc.journal.ciudad
Pallanza
dc.description.fil
Fil: Rigterink, Sonja. Technische Universitat Carolo Wilhelmina Zu Braunschweig.; Alemania
dc.description.fil
Fil: Echeverría Galindo, Paula. Technische Universitat Carolo Wilhelmina Zu Braunschweig.; Alemania
dc.description.fil
Fil: Martínez Abarca, Rodrigo. Technische Universitat Carolo Wilhelmina Zu Braunschweig.; Alemania
dc.description.fil
Fil: Massaferro, Julieta. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
dc.description.fil
Fil: Hoelzmann, Philipp. Freie Universität Berlin; Alemania
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Fil: Wünnemann, Bernd. Freie Universität Berlin; Alemania
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Fil: Laug, Andreas. Technische Universitat Carolo Wilhelmina Zu Braunschweig.; Alemania
dc.description.fil
Fil: Pérez, Liseth. Technische Universitat Carolo Wilhelmina Zu Braunschweig.; Alemania
dc.description.fil
Fil: Kang, Wengang. Technische Universitat Carolo Wilhelmina Zu Braunschweig.; Alemania
dc.description.fil
Fil: Börner, Nicole. Technische Universitat Carolo Wilhelmina Zu Braunschweig.; Alemania
dc.description.fil
Fil: Schwarz, Anja. Technische Universitat Carolo Wilhelmina Zu Braunschweig.; Alemania
dc.description.fil
Fil: Peng, Ping. Chinese Academy of Sciences; República de China
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Fil: Wang, Junbo. Chinese Academy of Sciences; República de China
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Fil: Zhu, Liping. Chinese Academy of Sciences; República de China
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Fil: Schwalb, Antje. Technische Universitat Carolo Wilhelmina Zu Braunschweig.; Alemania
dc.journal.title
Journal of Limnology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.jlimnol.it/index.php/jlimnol/article/view/2077
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.4081/jlimnol.2022.2077
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