Lake-wide physical and biological trends associated with warming in Lake Baikal

Izmest'eva, Lyubov R.; Moore, Marianne V.; Hampton, Stephanie E.; Ferwerda, Carolin J.; Gray, Derek K.; Woo, Kara; Pislegina, Helena V.; Krashchuk, L. S.; Shimaraeva, Svetlana V.; Silow, Eugene A.

doi:10.1016/j.jglr.2015.11.006

Cited by 115 publications

(81 citation statements)

References 38 publications

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“…The vast majority of our study lakes (>80% for both cohorts) exhibited surface water warming trends, consistent with single-lake, regional and global-scale studies reporting strong long-term surface temperature warming (Table 2; [46]). Warming surface waters during peak summer stratification in the NENA region are consistent with, and likely related to, increasing air temperatures in the region [3].…”

Section: Near-surface Warmingsupporting

confidence: 87%

Transparency, Geomorphology and Mixing Regime Explain Variability in Trends in Lake Temperature and Stratification across Northeastern North America (1975–2014)

Richardson

Melles

Pilla

et al. 2017

Water

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Lake surface water temperatures are warming worldwide, raising concerns about the future integrity of valuable lake ecosystem services. In contrast to surface water temperatures, we know far less about what is happening to water temperature beneath the surface, where most organisms live. Moreover, we know little about which characteristics make lakes more or less sensitive to climate change and other environmental stressors. We examined changes in lake thermal structure for 231 lakes across northeastern North America (NENA), a region with an exceptionally high density of lakes. We determined how lake thermal structure has changed in recent decades and assessed which lake characteristics are related to changes in lake thermal structure. In general, NENA lakes had increasing near-surface temperatures and thermal stratification strength. On average, changes in deepwater temperatures for the 231 lakes were not significantly different than zero, but individually, half of the lakes experienced warming and half cooling deepwater temperature through time. More transparent lakes (Secchi transparency >5 m) tended to have higher near-surface warming and greater increases in strength of thermal stratification than less transparent lakes. Whole-lake warming was greatest in polymictic lakes, where frequent summer mixing distributed heat throughout the water column. Lakes often function as important sentinels of climate change, but lake characteristics within and across regions modify the magnitude of the signal with important implications for lake biology, ecology and chemistry.

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Section: Near-surface Warmingsupporting

confidence: 87%

Transparency, Geomorphology and Mixing Regime Explain Variability in Trends in Lake Temperature and Stratification across Northeastern North America (1975–2014)

Richardson

Melles

Pilla

et al. 2017

Water

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“…We use the MAR modeling framework to quantify the strength of external drivers and biotic interactions within the community, and to determine if those interactions are modulated by climate factors. Given what we know about freshwater ecosystems, we expect to see results similar to Hampton et al and Izmest'eva et al [17,21] -that the composition of the zooplankton community in Lake Aleknagik will primarily be structured by external climate drivers, with cladocerans being more sensitive to warming than copepods We then use the best-fit community model to develop a variety of potential future climate change and salmon density scenarios to investigate how warming may propagate through the food web.…”

Section: Introductionmentioning

confidence: 82%

“…An analysis of the plankton community of Lake Baikal, for example, showed significant increases in water temperature, substantial increases in cladoceran densities (over 3-fold increase since 1946) and subtle declines in copepods [17,21]. MAR analysis of this community revealed that temperature effects on species dwarfed the effects of biotic interactions, and that, when biotic interactions were present, the two main taxonomic groups of zooplankton (cladocerans and copepods) interacted differently with various phytoplankton groups, suggesting strong potential for shifts in species dominance to have large effects on the entire aquatic community.…”

Section: Introductionmentioning

confidence: 99%

Effects of climate change on zooplankton community interactions in an Alaskan lake

Carter

Schindler

Francis

2017

Clim Chang Responses

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Background: Ecological communities are organized by interactions among the biota, and between the biota and external environmental drivers that affect the dynamics of individual taxa. Climate change may alter communities in unexpected ways when environmental drivers have complex effects on individual species that are then transmitted indirectly to other species via biotic interactions. Methods: We used a multivariate autoregressive (MAR) modeling framework to assess the strengths of intrinsic interactions and extrinsic (environmental) forcing responsible for changes in the zooplankton community of a sockeye salmon nursery lake in southwestern Alaska from 1963 to 2009. During this time period there has been a strong trend towards earlier spring ice breakup dates and warmer summer water temperatures. Results: MAR analyses of community time-series showed that water temperature was the dominant driver of change in the zooplankton community; competitive interactions were relatively rare, and only copepods (both cyclopoids and calanoids) were affected by predation (juvenile sockeye salmon). Best-fit community models were used to develop scenarios of zooplankton community composition under several different potential climate conditions and salmon densities and revealed the potential for a shift in the dominant zooplankton taxa in this lake, driven largely by taxon-specific sensitivity to climate and sockeye salmon predation. Conclusions: Simulations suggest that cladocerans will become more prevalent in this community and that calanoid copepods will suffer from ongoing climate warming. These results have important implications for fish in these northern lakes, as they suggest that the production of planktivorous fish should increase with ongoing climate change.

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“…Lake Uvildy is a typically tectonic lake in a deep piedmont fault. Its catchment area and water surface are 209 and 69 m 2 respectively [2]. Its length is 13.5 km, its maximum width is 9 km.…”

Section: Study Areamentioning

confidence: 99%

“…Lake ecosystem is developing very slowly from oligotrophic stage to eutrophic or dystrophic [1]. Nowadays the study of lake evolution to forecast the change in lake trophicity in prospect is of much interest [2]- [4].…”

Section: Introductionmentioning

confidence: 99%

Ecological State and New Approaches to the Restoration of Lake Uvildy, Russia

Mashkova¹,

Krupnova²,

Kostryukova³

et al. 2017

GEOMATE

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Lake Uvildy is situated in the North of Chelyabinsk region. Lake Uvildy is one of the largest and the most unique of South Ural's lakes. In 1975-1977 the drought occurred and water supplies dried up in South Ural. 234 million cubic meters were moved from the Uvildy lake in Argazi reservoir, which was a source of water supply of the Chelyabinsk city. The lake's water level fell by more than 4 meters. Only in 2008 the water level returned to the previous position, but riparian vegetation was flooded. In July 2014 we carried out an ecological survey of the lake in five sites. We discovered submerged tree and shrub vegetation at 50-70 meters from the bank. Chemical analysis of water revealed the accumulation of organic substances and the transition of nitrogen from nitrate to nitrite and ammonia, of sulfur from sulfate to sulfite and hydrogen sulphide, of carbon to methane. We found blue-green algae (Microcystis, Anabaena, Oscillatoria) in all the sites. It indicates the beginning of water eutrophication. We proposed a new method of ecological restoration of the lake. In August 2014 we cleaned the bottom of the lake in two research points with a special innovative bottom-cleaning machine working both as a pump and a crusher. The research in summer 2015 showed that the water quality had significantly improved and the process of eutrophication had stopped in the points where the bottom was cleaned. Works on the lake trophicity will be continued.

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Lake-wide physical and biological trends associated with warming in Lake Baikal

Cited by 115 publications

References 38 publications

Transparency, Geomorphology and Mixing Regime Explain Variability in Trends in Lake Temperature and Stratification across Northeastern North America (1975–2014)

Transparency, Geomorphology and Mixing Regime Explain Variability in Trends in Lake Temperature and Stratification across Northeastern North America (1975–2014)

Effects of climate change on zooplankton community interactions in an Alaskan lake

Ecological State and New Approaches to the Restoration of Lake Uvildy, Russia

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