Composition of highly diverse diatom community shifts as response to climate change: A down-core study of 23 central European mountain lakes

Kuefner, Wolfgang; Hofmann, Andrea; Ossyssek, Stefan; Dubois, Nathalie; Geist, Juergen; Raeder, Uta

doi:10.1016/j.ecolind.2020.106590

Cited by 15 publications

(24 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous diatom paleo-records from sites across a wide geographic range highlighted the recent success of small, fast-growing cyclotelloid species with enhanced water column stability and reduced vertical mixing (e.g. Rühland et al, 2003Rühland et al, , 2008Rühland et al, , 2015Douglas et al, 2004;Rühland and Smol, 2005;Karst-Riddoch et al, 2005;Smol et al, 2005;Kuefner & Hofmann et al, 2020). However, changes in nutrient concentrations also may have triggered shifts in the abundances of Cyclotella/Pantocsekiella spp., as this species prefer oligo-to moderately mesotrophic waters.…”

Section: Ecological History Of Oberer Soiernseementioning

confidence: 99%

Unravelling climate change impacts from other anthropogenic influences in a subalpine lake: a multi-proxy sediment study from Oberer Soiernsee (Northern Alps, Germany)

et al. 2021

Self Cite

View full text Add to dashboard Cite

Mountain lakes are increasingly impacted by a series of both local and global disturbances. The present study reveals the eutrophication history of a remote subalpine lake (Oberer Soiernsee, Northern Alps, Germany), triggered by deforestation, alpine pasturing, hut construction, tourism and atmospheric deposition, and identifies the intertwined consequences of on-going global warming on the lake’s ecosystem. The primary objective was to disentangle the various direct and indirect impacts of these multiple stressors via down-core analyses. Our multi-proxy approach included subfossil diatom assemblages, carbon and nitrogen stable isotope ratios and subfossil pigments from dated sediments. Shifts within the diatom assemblages were related to variations in trophic state, lake transparency, water temperature and thermal stratification. The organic carbon isotope (δ13Corg) records, the diatom valve density and the pigment concentrations documented the development of primary production and composition. Total nitrogen isotope values (δ15N) are more likely to reflect the history of atmospheric nitrogen pollution than lake-internal processes, also mirrored by the decoupling of δ15N and δ13Corg trends. The composition of sedimentary pigments allowed a differentiation between planktonic and benthic primary production. Concordant trends of all indicators suggested that the lake ecosystem passed a climatic threshold promoted by local and long-distance atmospheric nutrient loadings.

show abstract

Section: Ecological History Of Oberer Soiernseementioning

confidence: 99%

Unravelling climate change impacts from other anthropogenic influences in a subalpine lake: a multi-proxy sediment study from Oberer Soiernsee (Northern Alps, Germany)

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…2018, Kuefner et al. 2020b). In contrast, in shallow lakes the entire water body and biota are affected by changes in energy fluxes.…”

mentioning

confidence: 99%

“…2015, Kuefner et al. 2020b). Consequently, lake response to climate is expected to vary with both individual basin characteristics and along altitudinal gradients.…”

mentioning

confidence: 99%

“…For instance, macrophytes in mountain lakes of the Alps were found to be restricted mainly to lakes below the treeline (Kuefner et al. 2020b). Therefore, analyses of subfossil pigment biomarkers and reconstructed primary production can reveal a nonlinear or even sigmoid response to global warming depending on the altitude of a mountain lake, with the treeline playing a special role (Vinebrooke and Leavitt 1999).…”

mentioning

confidence: 99%

“…For example, lake depth and trophic state are the most important variables that modulate the response of mountain lakes to environmental changes (Kuefner et al. 2020b). In deeper lakes, hypolimnetic conditions can mitigate climate change‐related developments, as the warming and biological responses are mostly limited to the epilimnion (Rühland et al.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Algal Community Change in Mountain Lakes of the Alps Reveals Effects of Climate Warming and Shifting Treelines¹

Kuefner

Hofmann

Geist

et al. 2021

Journal of Phycology

Self Cite

View full text Add to dashboard Cite

The biological communities of mountain lakes are suspected to be highly sensitive to global warming and associated catchment changes. To identify the parameters determining algal community responses, subfossil pigments from 21 different mountain lakes in the Bavarian‐Tyrolean Limestone Alps were investigated. Sediment cores were radio‐isotopically dated, and their pigment preservation evaluated. General additive models (GAM) of pigment compositions were calculated with temperature as the explanatory variable and generalized linear models with several lake parameters explaining log‐transformed GAM P‐values. Lake depth and trophic state were identified as major control variables of the algal community and productivity changes. Shifts in a deep oligotrophic alpine lake (lg(P) = −1.04) were half as strong as in a shallow mesotrophic alpine lake (lg(P) = −1.86) with faster warming and higher productivity forcing the development of biomass. Phytoplankton and macrophyte pigments increased clearly with warming, at lower altitudes, and decreased at the treeline, so that periphytic pigments dominated alpine sediments. This pattern is probably the result of interactions of UV radiation and allochthonous inputs of DOM. Our findings suggest that (sub)alpine shallow lakes with higher nutrient levels are most vulnerable to climate change‐driven changes whereas deep, nutrient‐poor lakes appear more resilient.

show abstract

Seasonal diatom community responses to development and climate change in Lake George, an oligotrophic lake in the Adirondack Mountains

et al. 2022

View full text Add to dashboard Cite

Composition of highly diverse diatom community shifts as response to climate change: A down-core study of 23 central European mountain lakes

Cited by 15 publications

References 69 publications

Unravelling climate change impacts from other anthropogenic influences in a subalpine lake: a multi-proxy sediment study from Oberer Soiernsee (Northern Alps, Germany)

Unravelling climate change impacts from other anthropogenic influences in a subalpine lake: a multi-proxy sediment study from Oberer Soiernsee (Northern Alps, Germany)

Algal Community Change in Mountain Lakes of the Alps Reveals Effects of Climate Warming and Shifting Treelines¹

Seasonal diatom community responses to development and climate change in Lake George, an oligotrophic lake in the Adirondack Mountains

Contact Info

Product

Resources

About

Composition of highly diverse diatom community shifts as response to climate change: A down-core study of 23 central European mountain lakes

Cited by 15 publications

References 69 publications

Unravelling climate change impacts from other anthropogenic influences in a subalpine lake: a multi-proxy sediment study from Oberer Soiernsee (Northern Alps, Germany)

Unravelling climate change impacts from other anthropogenic influences in a subalpine lake: a multi-proxy sediment study from Oberer Soiernsee (Northern Alps, Germany)

Algal Community Change in Mountain Lakes of the Alps Reveals Effects of Climate Warming and Shifting Treelines1

Seasonal diatom community responses to development and climate change in Lake George, an oligotrophic lake in the Adirondack Mountains

Contact Info

Product

Resources

About

Algal Community Change in Mountain Lakes of the Alps Reveals Effects of Climate Warming and Shifting Treelines¹