Summer temperature variations in southern Kamchatka as reconstructed from a 247-year tree-ring chronology of <i>Betula ermanii</i>

Sano, Masaki; Furuta, Fumito; Sweda, Tatsuo

doi:10.1007/s10310-010-0183-z

Cited by 14 publications

(15 citation statements)

References 29 publications

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“…Recently, Nazarova et al (2013a) provided the first quantitative chironomid-based reconstruction of late Holocene T July (last 4500 years), documenting neoglacial cooling and the appearance of the Little Ice Age. In contrast to the long-term perspective, the climate history of the last 400 years is well documented in tree-ring and icecore records and suggest short-term climate oscillations at centennial to decadal time scales, driven by the modes of Pacific Decadal Oscillation (Solomina et al, 2007;Sano et al, 2010). Already from the few studies undertaken so far, it is obvious that the regional climate is and was complex and spatially heterogeneous.…”

Section: Introductionmentioning

confidence: 92%

Holocene environment of Central Kamchatka, Russia: Implications from a multi-proxy record of Two-Yurts Lake

Hoff

Biskaborn

Dirksen

et al. 2015

Global and Planetary Change

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Section: Introductionmentioning

confidence: 92%

Holocene environment of Central Kamchatka, Russia: Implications from a multi-proxy record of Two-Yurts Lake

Hoff

Biskaborn

Dirksen

et al. 2015

Global and Planetary Change

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“…Betula ermanii, a deciduous broad-leaved tree species, is widely distributed in open spaces of steep mountain slopes and/or boreal forests, mainly in Japan, in the Russian Far East and in Northeast China (Takahashi et al, 2005;Sano et al, 2010;Wang et al, 2013), where few conifers are even able to survive. Previous research has assessed its tree-ring growth (Takahashi et al, 2005;Yu et al, 2007;Wang et al, 2013), frost resistance (Gansert et al, 1999), and the microfungi associated with its leaf litter and their response to climate variation over an altitudinal gradient (Osono and Hirose, 2009).…”

Section: Host and Sitementioning

confidence: 99%

Carbon constrains fungal endophyte assemblages along the timberline

Yang

Weisenhorn

Gilbert

et al. 2016

Environmental Microbiology

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The alpha diversity of foliar fungal endophytes (FEs) in leaves of Betula ermanii in a subalpine timberline ecotone on Changbai Mountain, China increased with elevation. There were also significant differences in beta diversity along the elevation gradient. Among the environmental variables analysed, leaf carbon significantly increased with elevation, and was the most significant environmental factor that constrained the alpha and beta diversity in the FE communities. Tree height and the cellulose, lignin, and carbon/nitrogen ratio of the leaves also affected the FE assemblages. When controlled for the effects of elevation, leaf carbon was still the main driver of changes in evenness, Shannon diversity and FE community composition. The results offered clues of the carbon acquisition strategy of the foliar FEs across this cold terrain. There was strong multicollinearity between both annual precipitation and temperature, with elevation (|Pearson r| > 0.986), so the effects of these climatic variables were impossible to separate; however, they may play key roles, and the direct effects of both warrant further investigation. As pioneer decomposers of leaf litter, variations in diversity and community composition of FE measured here may feedback and influence carbon cycling and dynamics in these forest ecosystems.

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“…Klimaschewski (2010). Climate history during the last 400 years was reconstructed using tree-rings by Solomina et al (2007) and Sano et al (2010) and is summarized by Jones and Solomina (in this issue). Quaternary diatom records were studied by Braitseva et al (1968).…”

Section: Introductionmentioning

confidence: 99%

The Holocene environmental history of a small coastal lake on the north-eastern Kamchatka Peninsula

Solovieva

Klimaschewski

Self

et al. 2015

Global and Planetary Change

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a b s t r a c t a r t i c l e i n f oAvailable online xxxx A radiocarbon and tephra-dated sediment core from Lifebuoy Lake, located on the north-east coast of Kamchatka Peninsula, was analysed for pollen, spores, diatoms, chironomids and tephra in order to uncover regional environmental history. The 6500-year environmental history of Lifebuoy Lake correlates with the broad regional patterns of vegetation development and climate dynamics with both diatoms and chironomids showing near-synchronous changes. Between ca. 6300 and 3900 cal yr BP, the lake ecosystem was naturally enriched, with several Stephanodiscus species dominating the diatom plankton. This natural eutrophication state is likely to be due to a combination of the base-rich catchment geology, the fertilisation effect of several fires in the catchment, silica input from tephra layers and, possibly, nitrogen input from seabirds. The substantial tephra deposit at about 3850 cal yr BP might have stopped sedimentary phosphorus from entering the lake water thus decreasing the trophic state of the lake and facilitating the shift in diatom composition to a benthic Fragiliariaceae complex. Both diatoms and chironomids showed simultaneous compositional changes, which are also reflected by statistically significant changes in their rates of change 300-400 years after the arrival of Pinus pumila in the lake catchment. The rapid increase in both total diatom concentration and the percentage abundance of the large heavy species, Aulacoseira subarctica might be a response to the change in timing and intensity of lake spring turnover due to the changes in the patterns of North Pacific atmospheric circulation, most notably westward shift of the Aleutian Low. The two highest peaks in A. subarctica abundance at Lifebouy Lake occurred during opposite summer temperature inferences: the earlier peak (3500-2900 cal yr BP) coincided with warm summers and the latter peak (300 cal yr BP-present) occurred during the cold summer period. These imply that A. subarctica shows no direct response to the changes of summer air temperature. Instead, it appears to thrive during the periods of increased winter precipitation, thicker ice and late spring turn-over periods, i.e., shows indirect response to climate. The clearest effect of tephra deposition on the lake ecosystem is above 908 cm (ca. 3800 cal yr BP) where the tephra deposit might have caused the shift from Stephanodiscus-dominated planktonic assemblages to the Fragilariaceae complex of benthic species. Tephra deposits might have also contributed towards the development of eutrophic plankton from about 6300 cal yr BP. It is not certain if several tephra deposits influenced diatom and chironomid changes during the last 300 years.

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Summer temperature variations in southern Kamchatka as reconstructed from a 247-year tree-ring chronology of Betula ermanii

Cited by 14 publications

References 29 publications

Holocene environment of Central Kamchatka, Russia: Implications from a multi-proxy record of Two-Yurts Lake

Holocene environment of Central Kamchatka, Russia: Implications from a multi-proxy record of Two-Yurts Lake

Carbon constrains fungal endophyte assemblages along the timberline

The Holocene environmental history of a small coastal lake on the north-eastern Kamchatka Peninsula

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