Within‐lake and watershed determinants of carbon dioxide in surface water: A comparative analysis of a variety of lakes in the Japanese Islands

Urabe, Jotaro; Iwata, Tomoya; Yagami, Yosuke; Kato, E.; Suzuki, Takao; Hino, Shuji; Ban, Syuhei

doi:10.4319/lo.2011.56.1.0049

Cited by 24 publications

(14 citation statements)

References 46 publications

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“…The common prediction that lakes would exhibit a reduced NCP in a warmer climate is hitherto not clearly supported by field evidence. In cross‐system analyses, temperature have explained only little or none of the variation in NCP as estimated from pCO 2 (Algesten et al ., ; Sobek et al ., ; Kosten et al ., ; Urabe et al ., ), or even given a negative relationship between temperature and pCO 2 (Tadonléké, Marty & Planas, ). For deep and large waterbodies, there is both evidence and predictions that increasing temperature result in reduced GP and NCP as a consequence of more stable density stratification of water masses, preventing vertical transport of nutrients from deep water (Lehman, ).…”

Section: Discussionmentioning

confidence: 99%

“…It should be acknowledged that the mesocosms do not include the role of benthic processes, which are increasingly recognised as important to ecosystem carbon metabolism (Ask et al ., ; Karlsson et al ., ; Gudasz et al ., ; Urabe et al ., ), as sediments were not added to the experiment. Indeed, mineralisation of organic carbon in lake sediments has been shown to be strongly controlled by temperature and suggested to result in reduced organic carbon burial in boreal lakes and a positive feedback on global warming (Gudasz et al ., ).…”

Section: Discussionmentioning

confidence: 99%

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Warming and browning of lakes: consequences for pelagic carbon metabolism and sediment delivery

et al. 2013

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Summary Thousands of lakes in the Northern Hemisphere are experiencing a continuous increase in water temperature and colour. While increasing temperature is an effect of climate change, several factors are suggested to drive the increasing water colour, including climate change, altered land use and reversed acidification. In this mesocosm study, we study the effects on pelagic production and sedimentation of organic carbon from a 3 °C increase in temperature, a doubling of water colour and a combination of increased temperature and water colour. These manipulations correspond to the predicted development in water colour and temperature in northern temperate systems within the life time of the next generation. The water and plankton communities in the mesocosms were taken from an oligohumic and mesotrophic lake, and the increase in water colour was achieved by the additions of water from a humic lake. The experiment ran from early March to late October. In accordance with our predictions and previous cross‐system analyses, net carbon production (NCP) and organic carbon sedimentation decreased in response to increasing water colour. At odds with current theory, NCP and sedimentation increased in heated treatments, as not only respiration but also gross production increased in response to temperature. There were no synergistic effects between warming and browning. These results imply that warming may enhance pelagic delivery of organic carbon to sediments. This could potentially offset a reduction in burial efficiency of organic carbon, which has been projected based on a positive relationship between carbon mineralisation in sediments and temperature.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Warming and browning of lakes: consequences for pelagic carbon metabolism and sediment delivery

et al. 2013

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“…Lake Hourai-Numa is a lake with a neutral pH, located at the hillside, and is surrounded by coniferous forests dominated by Abies mariesii f. hayachinensi.T h e lake surface area is one order greater in Lake Hachiman-Numa than in Lake Hourai-Numa, but the watershed area is only four times greater in the former lake. According to the Secchi depth and TP concentration measured in recent years, both lakes are still within oligotrophic conditions (Ministry of the Environment 1979Environment , 1987Environment , 1993Urabe et al 2011). Because these lakes are located in high mountainous terrain, there have been never settlements in the watersheds.…”

Section: Study Sitesmentioning

confidence: 99%

Eutrophication of mountain lakes in Japan due to increasing deposition of anthropogenically produced dust

Tsugeki

Agusa

Ueda

et al. 2012

Ecological Research

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Atmospheric dust has wide‐reaching effects, not only influencing climate conditions, but also ecosystems. The eastern region of the Asian continent is one of the largest emitters of dust in the world, and recent economic growth in the region has been accompanied by an increase in anthropogenic emissions. However, the effects of increased Asian dusts on aquatic ecosystems are not well understood. We examined fossil pigments and zooplankton remains from 210Pb‐dated sediments taken from high mountain lakes of Hourai‐Numa and Hachiman‐Numa, located in the Towada‐Hachimantai National Park of Japan Islands, to uncover historical changes in the phyto‐ and zooplankton community over the past 100 years. Simultaneously, we measured the geochemical variables of TOC, TN, TP, δ13C, δ15N, and lead isotopes (207Pb/206Pb, 208Pb/206Pb) in the sediments to identify environmental factors causing such changes. As a result, despite few anthropogenic activities in the watersheds, alpine lakes in Japan had increased algal and herbivore plankton biomasses by 3–6 fold for recent years depending on the surrounding terrestrial vegetation and landscape conditions. Biological and biogeochemical proxies recorded from the lake sediments showed that this eutrophication occurred after the 1990s when P deposition increased as a result of atmospheric loading of dust transported from the Asian continent. The continued increase of anthropogenically produced dust may therefore impart damaging impacts on mountain ecosystems even if they are protected from direct anthropogenic disturbances.

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“…Even though spatial surveys indicate that changes in vegetation (Maberly et al, 2013;Urabe et al, 2011), forest fires 20 (Marchand et al 2009) and forestry activities (Ouellet et al, 2012) affect the greenhouse gas balance of inland waters, we are lacking mechanistic evidence from whole-catchment forest manipulation experiments. Here, we experimentally assess the impact of forest clear-cuts on CO2, CH4 and N2O emissions from lakes and streams in four boreal headwater catchments.…”

Section: Introductionmentioning

confidence: 99%

Greenhouse gas emissions from boreal inland waters unchanged after forest harvesting

Klaus¹,

Geibrink²,

Jönsson³

et al. 2018

Preprint

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Abstract. Forestry practices generally result in an increased export of carbon and nitrogen to downstream aquatic systems.Although these losses affect the greenhouse gas budget of managed forests, it is unknown if they modify greenhouse gas 10 emissions of recipient aquatic systems. To assess this question, we quantified atmospheric fluxes of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) of humic lakes and their inlet streams in four boreal catchments of which two were treated with forest clear-cuts followed by site preparation (18% and 44% of the catchment area) using a Before/AfterControl/Impact-experiment. We measured atmospheric gas fluxes and hydrological and physicochemical water characteristics in hillslope groundwater, along stream transects and at multiple locations in lakes at 2-hourly to biweekly intervals throughout 15 the summer season over a four year period. We found that the treatment did not significantly change greenhouse gas emissions from streams or lakes within three years of the treatment, despite significant increases of CO2 and CH4 concentrations in hillslope groundwater. Our results highlight the importance of the riparian zone-stream continuum as effective biogeochemical buffers and wind shelters to prevent greenhouse gases leaching from forest clear-cuts and evasion via downstream inland waters. These findings are representative for low productive forests located in relatively flat landscapes where forestry 20 practices cause only a limited initial impact on catchment hydrology and biogeochemistry.

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Within‐lake and watershed determinants of carbon dioxide in surface water: A comparative analysis of a variety of lakes in the Japanese Islands

Cited by 24 publications

References 46 publications

Warming and browning of lakes: consequences for pelagic carbon metabolism and sediment delivery

Warming and browning of lakes: consequences for pelagic carbon metabolism and sediment delivery

Eutrophication of mountain lakes in Japan due to increasing deposition of anthropogenically produced dust

Greenhouse gas emissions from boreal inland waters unchanged after forest harvesting

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