Hydrological change in lakes inferred from midge assemblages through use of an intralake calibration set

Luoto, Tomi P.

doi:10.1890/09-0498.1

Cited by 74 publications

(83 citation statements)

References 72 publications

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“…A single sediment sample obtained from the centre of this lake contained subfossil invertebrate remains originating from the entire lake basin. In contrast to Luoto (2010), our results support previous observations indicating that, in palaeolimnological studies, one profundal core can provide an integrated assessment of benthic invertebrate remains originating from the entire lake basin, especially in relatively small lakes with a steep bathymetry. Examining both living and subfossil assemblages will provide more complete and detailed information about the invertebrate community in a lake ecosystem than examination of only one of these assemblages.…”

Section: Discussionsupporting

confidence: 88%

“…It is unlikely, however, that transport of remains can cause a complete integration of littoral and profundal communities (Frey 1988;Heiri 2004). Moreover, transport of remains does not play an important role in all lakes (Iovino 1975;Walker et al 1984;Kurek and Cwynar 2009b;Luoto 2010). The most detailed study previously available that compared living and subfossil assemblages of chironomids by Iovino (1975) demonstrated that communities and their remains were qualitatively and quantitatively similar in a number of lakes.…”

Section: Taphonomy Of Invertebrate Remainsmentioning

confidence: 99%

“…The importance of wind for transport of remains is also recognized by others (Schmäh 1993;Eggermont et al 2007;Holmes et al 2009). Similarly, currents by inflowing streams can transport lotic and littoral remains into deeper parts of the basin (Heiri 2004;Bigler et al 2006;Luoto 2010).…”

Section: Taphonomy Of Invertebrate Remainsmentioning

confidence: 99%

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How representative are subfossil assemblages of Chironomidae and common benthic invertebrates for the living fauna of Lake De Waay, the Netherlands?

Hardenbroek

Heiri

Wilhelm³

et al. 2010

Aquat Sci

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The distribution of benthic invertebrates and their subfossil remains was examined within the basin of De Waay, a dimictic, eutrophic lake in the Netherlands. We focused on Chironomidae, but also report the abundances of 11 invertebrate groups that potentially produce chitinous remains that are preserved in the fossil record, although their remains could only be identified at a coarser taxonomic resolution. Most living invertebrates sampled in different seasons were constrained to the littoral zone, with the exception of a few taxa (Ceratopogonidae, Chaoborus flavicans, and Chironomus) that are adapted to low oxygen conditions in the seasonally anoxic profundal zone. In contrast, assemblages of invertebrate remains in lake surface sediments were similar in the entire lake basin, suggesting that considerable numbers of invertebrate remains are transported and redeposited off-shore in Lake De Waay, due to its steep bathymetry. These results indicate that a single sediment sample obtained from the centre of this lake contains subfossil invertebrate remains originating from the entire lake basin. In Lake De Waay, the majority of taxa found in the living assemblages were identified as remains in lake surface sediments, at least for the Chironomidae that could be identified at a similar taxonomic level in living and subfossil assemblages. Of the total 44 chironomid taxa found in Lake De Waay, 35 taxa occurred in the living assemblages and 34 taxa occurred in the subfossil assemblages. Thirty chironomid taxa occurred both as living and subfossil specimens, and on average these 30 taxa represent 94% of the specimens encountered in a sediment sample. Five rare chironomid taxa present as living larvae were not detected in the subfossil assemblages. Conversely, eight rare and four common chironomid taxa were found in subfossil remains, but not in living assemblages. Our results indicate that subfossil assemblages in surface sediment samples provide spatially integrated and representative samples of the living assemblage. However, a combined approach examining both the living benthic invertebrate fauna and invertebrate remains in lake surface sediments will potentially give a more complete and detailed overview of benthic invertebrates in a lake ecosystem than an approach based exclusively on one of these groups.

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Section: Discussionsupporting

confidence: 88%

Section: Taphonomy Of Invertebrate Remainsmentioning

confidence: 99%

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How representative are subfossil assemblages of Chironomidae and common benthic invertebrates for the living fauna of Lake De Waay, the Netherlands?

Hardenbroek

Heiri

Wilhelm³

et al. 2010

Aquat Sci

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“…Luoto 2010). Given the very complex set of interacting environmental and biological factors on species distribution and abundance, the robustness of reconstruction methods to the effects of confounding variables (Table 5) becomes very critical, and is often ignored in studies where two or three environmental variables are reconstructed simultaneously from the same data-set.…”

Section: Challenges and Future Developmentsmentioning

confidence: 99%

Strengths and Weaknesses of Quantitative Climate Reconstructions Based on Late-Quaternary Biological Proxies

Birks

2011

TOECOLJ

328

284

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Abstract:The importance of reconstructing past environments quantitatively in palaeoecology is reviewed by showing that many ecological questions asked of palaeoecological data commonly involve the reconstructions of past environment. Three basic approaches to reconstructing past climate from palaeoecological data are outlined and discussed in terms of their assumptions, strengths, and weaknesses. These approaches are the indicator-species approach involving bioclimateenvelope modelling; the assemblage approach involving modern analogue techniques and response surfaces; and the multivariate calibration-function approach. Topics common to all approaches are reviewed -presentation and interpretation, evaluation and validation, comparison, and general limitations of climate reconstructions. Challenges and possible future developments are presented and the potential future role of quantitative climate reconstructions in palaeoecology is summarised.

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“…All training-sets will produce results when applied down-core (Birks et al, 2010). Can chironomids provide reliable estimates for temperature change or for change along any of the other environmental variables from training-sets (Table 1) , unpublished data, 2001-2010. The fossil samples change along some unknown secondary gradient, NMDS2.…”

Section: Relationship To Temperaturementioning

confidence: 99%

Chironomids can be reliable proxies for Holocene temperatures. A comment on Velle et al. (2010)

et al. 2012

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Velle et al. (The Holocene 20 (2010) [989][990][991][992][993][994][995][996][997][998][999][1000][1001][1002] discussed discrepancies between Scandinavian Holocene chironomid-inferred temperature estimates, which they attribute to the response of chironomids to environmental variables other than temperature and to taxonomic shortcomings. They suggest ways in which the reliability of chironomid-based paleotemperature reconstructions could be improved by taking into account ecological complexity. While we agree with many of their recommendations, based on the results of other work, we think their paper is unnecessarily pessimistic regarding the ability of existing chironomid-based temperature inference models to provide reliable estimates of past temperature. We offer a critique of the main points discussed by Velle et al. (2010) and provide evidence that chironomid-based temperature inference models can reliably reconstruct mean July air temperature in the Lateglacial and Holocene over millennial and centennial timescales. Holocene comment and reply 2The Holocene strategies that can detect non-temperature artefacts in chironomidbased temperature records and to constrain a priori the types of environments in which chironomids perform well in tracking past temperature changes. Velle et al. (2010) provide a valuable set of recommendations for successful chironomid analysis which we largely endorse. However, the paper also makes several assertions that are not generally supported by the breadth of chironomid studies conducted over the past two decades. Here we seek to advance the discussion by providing another perspective on the utility of chironomids for reconstructing palaeotemperatures and evaluating some of the possible complications discussed by Velle et al. (2010). Temperature as a driver of chironomid distribution and abundanceCalibration data sets based on samples of modern chironomids across long temperature gradients show a strong relationship between chironomid assemblage composition and summer air temperature (e.g. Larocque et al., 2001;Lotter et al., 1997;Olander et al., 1999). For this reason chironomid-based temperature inference models can be developed with excellent performance statistics. However, Velle et al. (2010) imply that the main reason for the high performance of these models is because the temperature gradient is maximised in the calibration data set and the gradients of other environmental variables are minimised, rather than temperature being a particularly significant variable in driving the composition of chironomid assemblages. The reader may gain the impression that chironomids could be used to infer any variable provided the gradient length of the parameter is as long as possible and the influence of other variables is reduced. However, this overlooks the fact that the performance statistics of chironomid-based temperature inference models far exceed the performance statistics of other chironomid-based models designed to infer other variables such as total phosphoru...

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Hydrological change in lakes inferred from midge assemblages through use of an intralake calibration set

Cited by 74 publications

References 72 publications

How representative are subfossil assemblages of Chironomidae and common benthic invertebrates for the living fauna of Lake De Waay, the Netherlands?

How representative are subfossil assemblages of Chironomidae and common benthic invertebrates for the living fauna of Lake De Waay, the Netherlands?

Strengths and Weaknesses of Quantitative Climate Reconstructions Based on Late-Quaternary Biological Proxies

Chironomids can be reliable proxies for Holocene temperatures. A comment on Velle et al. (2010)

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