Tracking the long-term responses of diatoms and cladocerans to climate warming and human influences across lakes of the Ring of Fire in the Far North of Ontario, Canada

Hargan, Kathryn E.; Nelligan, Clare; Jeziorski, Adam; Rühland, Kathleen M.; Paterson, Andrew M.; Keller, Wendel; Smol, John P.

doi:10.1007/s10933-016-9901-7

Cited by 12 publications

(6 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The overall increase in pelagic bosminids at the landscape level may also be indicative of climate-mediated changes to lake thermal properties as has been reported in earlier paleolimnological investigations from Ontario (Jeziorski et al, 2015;Hargan et al, 2016) and elsewhere (Leppänen et al, 2017b;Armstrong and Kurek, 2019). Similar to many other parts of Ontario, the annual air temperature around Cobalt has increased (Supplementary Material 4).…”

Section: Differences In Cladoceran Assemblage Between Top and Bottom Sedimentssupporting

confidence: 53%

“…Similar to many other parts of Ontario, the annual air temperature around Cobalt has increased (Supplementary Material 4). For instance, warmer temperatures and associated lengthening of ice-free periods may alter the phenology and increase the production of pelagic cladoceran taxa through direct physiological mechanisms and/or indirect pathways such as higher food availability in the pelagic zone due to increases in planktonic production during longer open-water periods (Adrian et al, 2006;Carter and Schindler, 2012;Nevalainen and Luoto, 2012;Nevalainen et al, 2014;Hargan et al, 2016). Furthermore, in two uncontaminated sites (Clear and Goodwin) we observed a switch among pelagic taxa where the relative abundances of the large-bodied D. longispina complex decreased while small-bodied bosminids increased.…”

Section: Differences In Cladoceran Assemblage Between Top and Bottom Sedimentsmentioning

confidence: 99%

See 1 more Smart Citation

Assessing the potential environmental factors affecting cladoceran assemblage composition in arsenic-contaminated lakes near abandoned silver mines

2021

Self Cite

View full text Add to dashboard Cite

Silver mining has a long history in Cobalt (Ontario, Canada), and it has left a complex environmental legacy where many lakes are contaminated with arsenic-rich mine tailings. In this exploratory survey, we examined subfossil Cladocera remains in the surface sediments of 22 lakes in the abandoned mining region to assess which environmental variables may be influencing the recent assemblage structure. Further, using a “top-bottom” paleolimnological approach, we compared the recent (top) and older (bottom) assemblages from a subset of 16 lakes to determine how cladoceran composition has changed in these lakes. Our regional survey suggests that the cladoceran assemblages in the Cobalt area are primarily structured by differences in lake depth, while site-specific limnological characteristics, including those related to past mining activities, may have limited roles in shaping the recent cladoceran compositions. The top-bottom paleolimnological analysis suggests that the cladoceran assemblages have changed in most lakes around Cobalt, however the magnitude and nature of changes varied across the study sites. As with most regional biological surveys, the responses to historical mining activities were not uniform across all sites, which further emphasizes the importance of considering site-specific limnological characteristics and multiple environmental stressors when assessing the impacts of mining pollution.

show abstract

Section: Differences In Cladoceran Assemblage Between Top and Bottom Sedimentssupporting

confidence: 53%

Section: Differences In Cladoceran Assemblage Between Top and Bottom Sedimentsmentioning

confidence: 99%

Assessing the potential environmental factors affecting cladoceran assemblage composition in arsenic-contaminated lakes near abandoned silver mines

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Nearly 600 diatom-valves were microscopically counted per slide under 1000× magnification. A transformation function model of diatom-TP for the study area was then established using a weighted average regression with subsequent correction. , Sed-TP in the two reservoirs was also analyzed to evaluate their historical trends in the trophic status.…”

Section: Methodsmentioning

confidence: 99%

Century-Long Homogenization of Algal Communities Is Accelerated by Nutrient Enrichment and Climate Warming in Lakes and Reservoirs of the North Temperate Zone

Huo

Zhang

Monchamp

et al. 2022

Environ. Sci. Technol.

View full text Add to dashboard Cite

Anthropogenic pressures can threaten lake and reservoir ecosystems, leading to harmful algal blooms that have become globally widespread. However, patterns of phytoplankton diversity change and community assembly over long-term scales remain unknown. Here, we explore biodiversity patterns in eukaryotic algal (EA) and cyanobacterial (CYA) communities over a century by sequencing DNA preserved in the sediment cores of seven lakes and reservoirs in the North Temperate Zone. Comparisons within lakes revealed temporal algal community homogenization in mesotrophic lakes, eutrophic lakes, and reservoirs over the last century but no systematic losses of α-diversity. Temporal homogenization of EA and CYA communities continued into the modern day probably due to time-lags related to historical legacies, even if lakes go through a eutrophication phase followed by a reoligotrophication phase. Further, algal community assembly in lakes and reservoirs was mediated by both deterministic and stochastic processes, while homogeneous selection played a relatively important role in recent decades due to intensified anthropogenic activities and climate warming. Overall, these results expand our understanding of global change effects on algal community diversity and succession in lakes and reservoirs that exhibit different successional trajectories while also providing a baseline framework to assess their potential responses to future environmental change.

show abstract

“…The geomorphic setting, hydrological catchment connectivity, and morphology of a lake affect its responses to catchment disturbances resulting in lakes located on fine-textured landforms being more sensitive to disturbances than those on coarse-textured ones (Anderson, 2014;Boeff et al, 2016;Plach et al, 2016). Shallow lakes often show earlier and more pronounced responses than deeper lakes due to their sensitivity to catchment disturbances (Dearing and Jones, 2003;Hargan et al, 2016;Smol, 2016;Dubois et al, 2017).…”

Section: Pre-to Post-human Disturbance Changementioning

confidence: 99%

Quaternary Landforms and Basin Morphology Control the Natural Eutrophy of Boreal Lakes and Their Sensitivity to Anthropogenic Forcing

Tammelin

Kauppila

2018

Front. Ecol. Evol.

View full text Add to dashboard Cite

Both natural and anthropogenic changes in boreal lakes have been studied utilizing paleolimnological methods, but the spatial variation in the natural conditions of lakes and its connection to geological factors has drawn less attention. Our aims were to examine the spatial distribution of naturally eutrophic lakes on the previously glaciated terrain of central-eastern Finland and the relationship between pre-human disturbance water quality and geological factors related to the basins and their catchments. Furthermore, we studied the pre-to post-human disturbance changes in the diatom assemblages and water quality of 48 lakes (51 sampling sites) across the pre-disturbance phosphorus gradient by using the top-bottom sampling approach and multivariate statistics. According to our results, naturally eutrophic boreal lakes are more common than previously thought, occurring on fine-grained and organic Quaternary landforms, including fine-grained till. Our study emphasizes the importance of the previously overlooked matter of till grain-size variation as a driver behind the spatial variation in the natural trophic states of boreal lakes. The location of a lake in the hydrologic landscape and basin morphology appear to be important factors as well. Shallow, naturally eutrophic lakes with short water residence times and high catchment area to lake area and volume ratios have been particularly sensitive to anthropogenic forcing. Our results indicate that cultural eutrophication is not the only water protection challenge for the relatively remote and dilute boreal lakes, but salinization and alkalinization are also serious threats that should be taken into account. Therefore, it is crucial to consider the notable variation in the natural conditions of boreal lakes in addition to mitigating the effects of anthropogenic forcing, such as nutrient loading, catchment erosion, salt pollution, and climate change, in order to achieve efficient water protection.

show abstract

Tracking the long-term responses of diatoms and cladocerans to climate warming and human influences across lakes of the Ring of Fire in the Far North of Ontario, Canada

Cited by 12 publications

References 63 publications

Assessing the potential environmental factors affecting cladoceran assemblage composition in arsenic-contaminated lakes near abandoned silver mines

Assessing the potential environmental factors affecting cladoceran assemblage composition in arsenic-contaminated lakes near abandoned silver mines

Century-Long Homogenization of Algal Communities Is Accelerated by Nutrient Enrichment and Climate Warming in Lakes and Reservoirs of the North Temperate Zone

Quaternary Landforms and Basin Morphology Control the Natural Eutrophy of Boreal Lakes and Their Sensitivity to Anthropogenic Forcing

Contact Info

Product

Resources

About