umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Effects of long term nutrient and climate variability on subfossil Cladocera in a deep, subalpine lake (Lake Garda, northern Italy)
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences. IASMA Research and Innovation Centre, E. Mach Foundation-Istituto Agrario di San Michele all’Adige, S. Michele All’Adige, Trento, Italy.ORCID iD: 0000-0003-1637-304X
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2017 (English)In: Journal of Paleolimnology, ISSN 0921-2728, E-ISSN 1573-0417, Vol. 58, no 3, p. 335-351Article in journal (Refereed) Published
Abstract [en]

Albeit subfossil Cladocera remains are considered as a reliable proxy for tracking historical lake development, they have been scarcely studied in large subalpine lakes south of the Alps. In this study, subfossil Cladocera remains from Lake Garda in northern Italy were analyzed to track the lake's environmental changes since the Middle Ages. One core was retrieved from the largest sub-basin of Lake Garda (Brenzone, 350 m deep) and two cores were retrieved from the profundal and littoral zone of the smaller lake sub-basin (Bardolino, 80 and 40 m deep, respectively). The species distribution of Cladocera remains in recent sediment layers was similar to that observed in contemporary water samples. The deepest sections of the three cores were characterized by species sensitive to water temperature, which suggest a key role of major climatic events in driving the lake response during the late Holocene. The most evident change in Cladocera assemblages in the studied cores was observed during the 1960s, when planktonic taxa such as Daphnia spp. and Bosmina spp. became dominant at the expense of littoral taxa. Despite the highly coherent general pattern of subfossil Cladocera, the cores showed a set of minor differences, which were attributed to different morphological and hydrological features of the two basins forming Lake Garda. Multivariate analysis revealed a clear relation of Cladocera to climate variability during periods of low lake nutrient levels (i.e. before the 1960s). This provides additional information on past ecological responses of Lake Garda, as contrast previous data from subfossil diatom and pigment analyses did not fully capture effects of climate change during the same period. Since the 1960s shifts in assemblage composition of Cladocera and diatoms were highly coherent, in response to nutrient increase and the following, less pronounced, decrease in nutrient concentrations. During the last five decades, the response of the Cladocera to climate variability appeared to be masked by nutrient change. This work points up the potential of the multi-proxy approach for disentangling the multifaceted biological responses to multiple environmental stressors in large and deep lakes.

Place, publisher, year, edition, pages
SPRINGER , 2017. Vol. 58, no 3, p. 335-351
Keywords [en]
Cladocera, Paleoecology, Sediment, Climate change, Trophy, Lake Garda
National Category
Geology
Identifiers
URN: urn:nbn:se:umu:diva-140029DOI: 10.1007/s10933-017-9981-zISI: 000410483900005OAI: oai:DiVA.org:umu-140029DiVA, id: diva2:1146234
Available from: 2017-10-02 Created: 2017-10-02 Last updated: 2018-06-09Bibliographically approved

Open Access in DiVA

fulltext(1620 kB)22 downloads
File information
File name FULLTEXT01.pdfFile size 1620 kBChecksum SHA-512
7a7adbc0fb597cd229b272d4520bbef955a3cb726555920c575451969099d9c9a8e014c85c9eff212b627428ed0e836031362b586ca571a9d089c52f44436d63
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records BETA

Milan, ManuelaBigler, Christian

Search in DiVA

By author/editor
Milan, ManuelaBigler, Christian
By organisation
Department of Ecology and Environmental Sciences
In the same journal
Journal of Paleolimnology
Geology

Search outside of DiVA

GoogleGoogle Scholar
Total: 22 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 92 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf