Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13512 |
Thermocline deepening boosts ecosystem metabolism: evidence from a large-scale lake enclosure experiment simulating a summer storm | |
Giling, Darren P.1,5,6; Nejstgaard, Jens C.1; Berger, Stella A.1; Grossart, Hans-Peter1,2; Kirillin, Georgiy3; Penske, Armin1; Lentz, Maren1; Casper, Peter1; Sareyka, Joerg1; Gessner, Mark O.1,4 | |
2017-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany |
英文摘要 | Extreme weather events can pervasively influence ecosystems. Observations in lakes indicate that severe storms in particular can have pronounced ecosystem-scale consequences, but the underlying mechanisms have not been rigorously assessed in experiments. One major effect of storms on lakes is the redistribution of mineral resources and plankton communities as a result of abrupt thermocline deepening. We aimed at elucidating the importance of this effect by mimicking in replicated large enclosures (each 9 m in diameter, ca. 20 m deep, ca. 1300 m 3 in volume) a mixing event caused by a severe natural storm that was previously observed in a deep clear-water lake. Metabolic rates were derived from diel changes in vertical profiles of dissolved oxygen concentrations using a Bayesian modelling approach, based on high-frequency measurements. Experimental thermocline deepening stimulated daily gross primary production (GPP) in surface waters by an average of 63% for > 4 weeks even though thermal stratification re-established within 5 days. Ecosystem respiration (ER) was tightly coupled to GPP, exceeding that in control enclosures by 53% over the same period. As GPP responded more strongly than ER, net ecosystem productivity (NEP) of the entire water column was also increased. These protracted increases in ecosystem metabolism and autotrophy were driven by a proliferation of inedible filamentous cyanobacteria released from light and nutrient limitation after they were entrained from below the thermocline into the surface water. Thus, thermocline deepening by a single severe storm can induce prolonged responses of lake ecosystem metabolism independent of other storm-induced effects, such as inputs of terrestrial materials by increased catchment run-off. This highlights that future shifts in frequency, severity or timing of storms are an important component of climate change, whose impacts on lake thermal structure will superimpose upon climate trends to influence algal dynamics and organic matter cycling in clear-water lakes. Keywords: climate variability, ecosystem productivity, extreme events, gross primary production, mesocosm, respiration stratified lakes |
英文关键词 | climate variability ecosystem productivity extreme events gross primary production mesocosm respiration stratified lakes |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396836800008 |
WOS关键词 | TEMPORAL DYNAMICS ; WATER TEMPERATURE ; EXTREME EVENTS ; CARBON-DIOXIDE ; BODY-SIZE ; CLIMATE ; PHYTOPLANKTON ; STRATIFICATION ; NUTRIENTS ; OXYGEN |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17868 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Leibniz Inst Freshwater Ecol & Inland Fisheries I, Dept Expt Limnol, Alte Fischerhutte 2, D-16775 Stechlin, Germany; 2.Univ Potsdam, Inst Biochem & Biol, Maulbeerallee 2, D-14469 Potsdam, Germany; 3.Leibniz Inst Freshwater Ecol & Inland Fisheries I, Dept Ecohydrol, Muggelseedamm 310, D-12587 Berlin, Germany; 4.Berlin Inst Technol TU Berlin, Dept Ecol, Ernst Reuter Pl 1, D-10623 Berlin, Germany; 5.German Ctr Integrat Biodivers Res iDiv, Deutsch Pl 5e, D-04103 Leipzig, Germany; 6.Univ Leipzig, Inst Biol, Johannisallee 21, D-04103 Leipzig, Germany |
推荐引用方式 GB/T 7714 | Giling, Darren P.,Nejstgaard, Jens C.,Berger, Stella A.,et al. Thermocline deepening boosts ecosystem metabolism: evidence from a large-scale lake enclosure experiment simulating a summer storm[J]. GLOBAL CHANGE BIOLOGY,2017,23(4). |
APA | Giling, Darren P..,Nejstgaard, Jens C..,Berger, Stella A..,Grossart, Hans-Peter.,Kirillin, Georgiy.,...&Gessner, Mark O..(2017).Thermocline deepening boosts ecosystem metabolism: evidence from a large-scale lake enclosure experiment simulating a summer storm.GLOBAL CHANGE BIOLOGY,23(4). |
MLA | Giling, Darren P.,et al."Thermocline deepening boosts ecosystem metabolism: evidence from a large-scale lake enclosure experiment simulating a summer storm".GLOBAL CHANGE BIOLOGY 23.4(2017). |
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