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Charophytes collapse beyond a critical warming and brownification threshold in shallow lake systems

文献类型：期刊论文

作者Choudhury, Maidul I.1,2; Urrutia-Cordero, Pablo3,4,5; Zhang, Huan1,6; Ekvall, Mattias K.1,7; Medeiros, Leonardo Rafael1,8; Hansson, Lars-Anders1
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2019-04-15
卷号661页码:148-154
关键词Climate change Chara vulgaris Freshwater Growth rate Humic substances Mesocosm
ISSN号0048-9697
DOI10.1016/j.scitotenv.2019.01.177
通讯作者Choudhury, Maidul I.(maidul.choudhury@slu.se)
英文摘要Charophytes play a critical role for the functioning of shallow lake ecosystems. Although growth of charophytes can be limited by many factors, such as temperature, nutrients and light availability, our understanding about concomitant effects of climate warming and other large-scale environmental perturbations, e.g. increases in humic matter content ('brownification') is still limited. Here we conducted an outdoor mesocosm experiment during 71 days with a common charophyte species, Chara vulgaris, along an increasing gradient of temperature and brownification. We hypothesized the growth of C. vulgaris to increase with temperature, but to level off along the combined temperature and brownification gradient when reaching a critical threshold for light limitation via brownification. We show that C. vulgaris increases the relative growth rate (RGR), main and total shoot elongation, as well as number of lateral shoots when temperature and brownification increased by +2 degrees C and + 100%, respectively above today's levels. However, the RGR, shoot elongation and number of lateral shoots declined at further increment of temperature and brownification. Macrophyte weight-length ratio decreased with increased temperature and brownification, indicating that C. vulgaris allocate more resources or energy for shoot elongation instead of biomass increase at warmer temperatures and higher brownification. Our study shows that C. vulgaris will initially benefit from warming and brownification but will then decline as a future scenario of increased warming and brownification reaches a certain threshold level, in case of our experiment at +4 degrees C and a 2-fold increase in brownification above today's levels. (C) 2019 Elsevier B.V. All rights reserved.
WOS关键词MESOCOSM EXPERIMENTS ; SUBMERGED PLANTS ; ORGANIC-MATTER ; CLIMATE ; TEMPERATURE ; MACROPHYTES ; LIGHT ; PHYTOPLANKTON ; GROWTH ; ASSEMBLAGES
资助项目ERA-Net BiodivERsA project LIMNOTIP ; Formas, Sweden[226-2012-1824]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000458408200016
出版者ELSEVIER SCIENCE BV
资助机构ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; Formas, Sweden ; Formas, Sweden ; Formas, Sweden ; Formas, Sweden ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; Formas, Sweden ; Formas, Sweden ; Formas, Sweden ; Formas, Sweden ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; Formas, Sweden ; Formas, Sweden ; Formas, Sweden ; Formas, Sweden ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; ERA-Net BiodivERsA project LIMNOTIP ; Formas, Sweden ; Formas, Sweden ; Formas, Sweden ; Formas, Sweden
源URL[http://ir.ihb.ac.cn/handle/342005/28032]  
专题水生生物研究所_淡水生态学研究中心
通讯作者Choudhury, Maidul I.
作者单位1.Lund Univ, Dept Biol Aquat Ecol, Ecol Bldg, SE-22362 Lund, Sweden
2.Swedish Univ Agr Sci, Dept Aquat Sci & Environm Assessment, Box 7050, S-75007 Uppsala, Sweden
3.Uppsala Univ, Dept Ecol & Genet Limnol, Evolutionary Biol Ctr, Uppsala, Sweden
4.HIFMB, Ammerlander Heerstr 231, D-26129 Oldenburg, Germany
5.Carl von Ossietzky Univ Oldenburg, Inst Chem & Biol Marine Environm ICBM, Schleusenstr 1, D-26382 Wilhelmshaven, Germany
6.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
7.Cty Adm Board Skane Environm & Climate, Sodergaten 5, S-20515 Malmo, Sweden
8.Fed Inst Educ Sci & Technol Rio Grande do Norte I, BR-59508000 Mossoro, RN, Brazil
推荐引用方式
GB/T 7714		 Choudhury, Maidul I.,Urrutia-Cordero, Pablo,Zhang, Huan,et al. Charophytes collapse beyond a critical warming and brownification threshold in shallow lake systems[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,661:148-154.
APA Choudhury, Maidul I.,Urrutia-Cordero, Pablo,Zhang, Huan,Ekvall, Mattias K.,Medeiros, Leonardo Rafael,&Hansson, Lars-Anders.(2019).Charophytes collapse beyond a critical warming and brownification threshold in shallow lake systems.SCIENCE OF THE TOTAL ENVIRONMENT,661,148-154.
MLA Choudhury, Maidul I.,et al."Charophytes collapse beyond a critical warming and brownification threshold in shallow lake systems".SCIENCE OF THE TOTAL ENVIRONMENT 661(2019):148-154.

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来源：水生生物研究所

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