Hot tops, cold bottoms: Synergistic climate warming and shielding effects increase carbon burial in lakes

Bartosiewicz, Maciej; Przytulska, Anna; Lapierre, Jean‐François; Laurion, Isabelle; Lehmann, Moritz F.; Maranger, Roxane

doi:10.1002/lol2.10117

Cited by 102 publications

(92 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These are two prominent drivers of long-term decreases in water transparency via eutrophication and browning that would result in greater deepwater and mean water temperature cooling 2,33 in these specific regions but less so in other regions. In a review of 205 lakes that reported deepwater temperature trends, nearly all lakes that had cooling deeper waters also experienced decreasing water transparency primarily due to either eutrophication or browning 45 . However, the lack of time series for in-situ measurements of chlorophyll, DOC, Secchi depth, or other water transparency related variables limit our ability to test this proposed mechanism explicitly for these two lake thermal regions.…”

Section: Discussionmentioning

confidence: 99%

Deeper waters are changing less consistently than surface waters in a global analysis of 102 lakes

Pilla

Williamson

Адамович

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Globally, lake surface water temperatures have warmed rapidly relative to air temperatures, but changes in deepwater temperatures and vertical thermal structure are still largely unknown. We have compiled the most comprehensive data set to date of long-term (1970–2009) summertime vertical temperature profiles in lakes across the world to examine trends and drivers of whole-lake vertical thermal structure. We found significant increases in surface water temperatures across lakes at an average rate of + 0.37 °C decade−1, comparable to changes reported previously for other lakes, and similarly consistent trends of increasing water column stability (+ 0.08 kg m−3 decade−1). In contrast, however, deepwater temperature trends showed little change on average (+ 0.06 °C decade−1), but had high variability across lakes, with trends in individual lakes ranging from − 0.68 °C decade−1 to + 0.65 °C decade−1. The variability in deepwater temperature trends was not explained by trends in either surface water temperatures or thermal stability within lakes, and only 8.4% was explained by lake thermal region or local lake characteristics in a random forest analysis. These findings suggest that external drivers beyond our tested lake characteristics are important in explaining long-term trends in thermal structure, such as local to regional climate patterns or additional external anthropogenic influences.

show abstract

Section: Discussionmentioning

confidence: 99%

Deeper waters are changing less consistently than surface waters in a global analysis of 102 lakes

Pilla

Williamson

Адамович

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Although periodically acting as CO 2 sinks (Laurion et al ., 2010), thermokarst ponds are often CO 2 and CH 4 oversaturated and thus generally recognized as a significant source of greenhouse gases (GHGs) (Sobek et al ., 2005; Breton et al ., 2009). CH 4 emissions from such ponds account for two‐third of the total emissions in regions above the latitude 50°N (Wik et al ., 2016) and are strongly stimulated by atmospheric warming (Negandhi et al ., 2014; Negandhi et al ., 2016; Bartosiewicz et al ., 2019). However, shallow ponds are still mostly neglected in estimates of regional and global C budgets (Muster et al ., 2012).…”

Section: Introductionmentioning

confidence: 99%

The biogeochemical variability of Arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes

Moigne

Bartosiewicz

Schaepman‐Strub

et al. 2020

Environmental Microbiology

Self Cite

View full text Add to dashboard Cite

Summary Shallow thermokarst ponds are a conspicuous landscape element of the Arctic Siberian tundra with high biogeochemical variability. Little is known about how microbes from the regional species pool assemble into local pond communities and how the resulting patterns affect functional properties such as dissolved organic carbon (DOC) remineralization and greenhouse gas (GHG) turnover. We analysed the pelagic microbiomes of 20 ponds in north‐eastern Siberia in the context of their physico‐chemical properties. Ponds were categorized as polygonal or trough according to their geomorphological origin. The diversity of bacteria and eukaryotic microbes was assessed by ribosomal gene tag sequencing. Null model analysis revealed an important role of stochastic assembly processes within ponds of identical origin, in particular for genotypes only occurring in few systems. Nevertheless, the two pond types clearly represented distinct niches for both the bacterial and eukaryotic microbial communities. Carbon dioxide concentration, indicative of heterotrophic microbial processes, varied greatly, especially in the trough ponds. Methane concentrations were lower in polygonal ponds and were correlated with the estimated abundance of methanotrophs. Thus, the overall functional variability of Arctic ponds reflects the stochastic assembly of their microbial communities. Distinct functional subcommunities can, nevertheless, be related to GHG concentrations.

show abstract

“…Because Daphnia plays a vital role in freshwater ecosystems 60 , its fate will have a bearing on the functioning of entire ecosystems. Planktonic organisms that inhabit stratified lakes with deep-water refuges might be less susceptible to the negative consequences of temperature increase 61 , but in the case of shallow polymictic lakes, temperature increase is likely to have far-reaching consequences.…”

Section: Discussionmentioning

confidence: 99%

Temperature increase altered Daphnia community structure in artificially heated lakes: a potential scenario for a warmer future

Dziuba

Herdegen-Radwan

Pluta

et al. 2020

Sci Rep

View full text Add to dashboard Cite

Under conditions of global warming, organisms are expected to track their thermal preferences, invading new habitats at higher latitudes and altitudes and altering the structure of local communities. To fend off potential invaders, indigenous communities/populations will have to rapidly adapt to the increase in temperature. In this study, we tested if decades of artificial water heating changed the structure of communities and populations of the Daphnia longispina species complex. We compared the species composition of contemporary Daphnia communities inhabiting five lakes heated by power plants and four non-heated control lakes. The heated lakes are ca. 3-4 °C warmer, as all lakes are expected to be by 2100 according to climate change forecasts. We also genotyped subfossil resting eggs to describe past shifts in Daphnia community structure that were induced by lake heating. Both approaches revealed a rapid replacement of indigenous D. longispina and D. cucullata by invader D. galeata immediately after the onset of heating, followed by a gradual recovery of the D. cucullata population. Our findings clearly indicate that, in response to global warming, community restructuring may occur faster than evolutionary adaptation. The eventual recolonisation by D. cucullata indicates that adaptation to novel conditions can be time-lagged, and suggests that the long-term consequences of ecosystem disturbance may differ from short-term observations. Temperature increase, a major component of climate change 1 , is expected to exert a strong direct impact on the functioning of freshwater organisms, e.g., modifying their physiology, development, and/or fitness 2-5. Rising temperatures will also trigger a multitude of indirect effects on aquatic habitats, including alteration of abiotic parameters (e.g., oxygen saturation and ice cover duration) 6,7 and biotic interactions (e.g., changes in primary production, predation intensity, mismatches in the occurrence of interdependent species, and altered hostparasite interaction dynamics) 6,8,9. These changes will have an impact on the performance of individuals, and consequently on the structure and functioning of populations and communities 10,11. Based on the current effects of climate change and models of further warming, it is predicted that many species could be threatened with extinction 12,13. Thus, forecasting species' responses to the warming climate is a timely issue in ecology, evolutionary biology, and environmental protection. According to Bellard and coauthors 14 , there are three non-exclusive types of organismal responses to climate change, namely, alterations in (1) time of occurrence (e.g., shifts in phenology), (2) space (e.g., altered distribution range), and (3) self (i.e., changes in organisms' physiology, not related to spatial or temporal changes). A change

show abstract

Hot tops, cold bottoms: Synergistic climate warming and shielding effects increase carbon burial in lakes

Cited by 102 publications

References 80 publications

Deeper waters are changing less consistently than surface waters in a global analysis of 102 lakes

Deeper waters are changing less consistently than surface waters in a global analysis of 102 lakes

The biogeochemical variability of Arctic thermokarst ponds is reflected by stochastic and niche‐driven microbial community assembly processes

Temperature increase altered Daphnia community structure in artificially heated lakes: a potential scenario for a warmer future

Contact Info

Product

Resources

About