Cogs in the endless machine: Lakes, climate change and nutrient cycles: A review

Moss, Brian

doi:10.1016/j.scitotenv.2011.07.069

Cited by 145 publications

(109 citation statements)

References 200 publications

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“…CH 4 emissions from surface waters, particularly from freshwaters [2][3][4] , are a major element of the global atmospheric CH 4 budget, and we suggest here that the algal-mediated baseline flux is not only a major contributor to these overall aquatic CH 4 emissions, but also one that is particularly sensitive to environmental change. As such, widespread and intensifying human-and climate-driven changes in pelagic nutrient availability [47][48][49] , terrestrial DOC inputs 50,51 and physical structure of the water column 47,48,51 , which strongly shape aquatic algal dynamics 47,[51][52][53][54] , may have major, but previously unconsidered, consequences for oxic water methanogenesis and aquatic CH 4 emissions.…”

Section: Discussionmentioning

confidence: 99%

Oxic water column methanogenesis as a major component of aquatic CH4 fluxes

et al. 2014

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Methanogenesis has traditionally been assumed to occur only in anoxic environments, yet there is mounting, albeit indirect, evidence of methane (CH 4 ) production in oxic marine and freshwaters. Here we present the first direct, ecosystem-scale demonstration of methanogenesis in oxic lake waters. This methanogenesis appears to be driven by acetoclastic production, and is closely linked to algal dynamics. We show that oxic water methanogenesis is a significant component of the overall CH 4 budget in a small, shallow lake, and provide evidence that this pathway may be the main CH 4 source in large, deep lakes and open oceans. Our results challenge the current global understanding of aquatic CH 4 dynamics, and suggest a hitherto unestablished link between pelagic CH 4 emissions and surface-water primary production. This link may be particularly sensitive to widespread and increasing human influences on aquatic ecosystem primary productivity.

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Section: Discussionmentioning

confidence: 99%

Oxic water column methanogenesis as a major component of aquatic CH4 fluxes

et al. 2014

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“…Therefore, natural variability in climate and limnological features seemed to be more important in determining the ecological patterns within boreal lakes of eastern Canada than short-term impacts of logging. Considering the climatic change projection in the boreal shield, where temperature is projected to increase by 8.0 • C during winter and an overall increase in precipitation of 11% distributed more in winter and spring [68], these findings bear important meanings since longer growing seasons and frost-free periods will drastically modify the limnological features and aquatic biodiversity of north-temperate lakes [6]. We expect less zooplankton abundance in boreal lakes with warmer and wetter climate, particularly for sensitive groups as the Copepoda Calanoida which would decline when higher rain accumulation and runoff will increase DOC and nutrients and decrease water transparency [21].…”

Section: Discussionmentioning

confidence: 94%

“…Climate warming in boreal regions (increasing temperature and irradiance) can strongly affect physical (ice cover, thermocline depth), chemical (water quality), and biological (plankton productivity) characteristics of lakes across large spatial scales [2,3]. Although lakes are recognized as sentinels of climate change [4][5][6] and watershed land-use [7,8] at regional scale, their responses to climate fluctuations may be confounded by multiple watershed anthropogenic disturbances [9,10]. Inversely, climatic conditions, especially year-to year differences in snow accumulation and rain precipitation, modulate the impacts of watershed disturbances by clearcut logging in boreal lakes [1,11,12].…”

Section: Introductionmentioning

confidence: 99%

Effects of Climate, Limnological Features and Watershed Clearcut Logging on Long-Term Variation in Zooplankton Communities of Boreal Shield Lakes

Lévesque

Pinel‐Alloul

Méthot

et al. 2017

Water

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Abstract:In Canada, climate change and forest harvesting may both threaten the ecological integrity of boreal lakes. To disentangle the effects of natural variation in climate and lake environments from those of logging, we evaluated long-term variation (1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003) in zooplankton communities of six boreal lakes in Ontario. We monitored concomitantly changes in zooplankton abundance and composition in three undisturbed and three harvested lakes, five years prior and eight years after watershed clearcut logging. We tested the hypothesis that long-term natural variation in climate and lake environments will be more important drivers of zooplankton community changes than short-term impacts of logging. We used space/time interaction tests and asymmetric eigenvector maps to model zooplankton responses to environmental changes and logging. Year-to-year variation in zooplankton abundance and composition were almost an order of magnitude whereas among-lake variation was stable through time. Breakpoints in time series of zooplankton in each lake were not directly related to logging. Climatic and limnological features were the most important drivers of long-term variation in the zooplankton community, shading the effect of logging. These results highlight the need to better understand the pressures exerted by climate change on boreal lake ecosystems in the context of anthropogenic pressure, such as logging.

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“…However, in arid and semi-arid areas, many lake areas have decreased sharply because of drought, global warming, strong evaporation, and increasing population, with a great increase in water consumption for life and production [1]. Playing a key role in hydrological cycles, lakes affect many aspects of society and ecosystems, such as water storage, moderation of climate, and energy production and irrigation, especially in arid and semi-arid regions [7][8][9][10][11]. Meanwhile, fluctuations in lake areas may result in disasters such as floods in humid regions and water shortages in arid and semi-arid regions [12,13].…”

Section: Introductionmentioning

confidence: 99%

Lake Area Changes and Their Influence on Factors in Arid and Semi-Arid Regions along the Silk Road

et al. 2018

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Abstract:In the context of global warming, the changes in major lakes and their responses to the influence factors in arid and semi-arid regions along the Silk Road are especially important for the sustainable development of local water resources. In this study, the areas of 24 lakes were extracted using MODIS NDVI data, and their spatial-temporal characteristics were analyzed. In addition, the relationship between lake areas and the influence factors, including air temperature, precipitation, evapotranspiration, land use and land cover change (LULCC) and population density in the watersheds, were investigated. The results indicated that the areas of most lakes shrank, and the total area decreased by 22,189.7 km 2 from 2001 to 2016, except for those of the lakes located on the Qinghai-Tibetan Plateau. The air temperature was the most important factor for all the lakes and increased at a rate of 0.113 • C/a during the past 16 years. LULCC and the increasing population density markedly influenced the lakes located in the middle to western parts of this study area. Therefore, our results connecting lake area changes in the study region highlight the great challenge of water resources and the urgency of implementation of the green policy in the One Belt and One Road Initiative through international collaboration.

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Cogs in the endless machine: Lakes, climate change and nutrient cycles: A review

Cited by 145 publications

References 200 publications

Oxic water column methanogenesis as a major component of aquatic CH4 fluxes

Oxic water column methanogenesis as a major component of aquatic CH4 fluxes

Effects of Climate, Limnological Features and Watershed Clearcut Logging on Long-Term Variation in Zooplankton Communities of Boreal Shield Lakes

Lake Area Changes and Their Influence on Factors in Arid and Semi-Arid Regions along the Silk Road

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