Arid
DOI10.1111/fwb.13098
Does the severity of non-flow periods influence ecosystem structure and function of temporary streams? A mesocosm study
Munoz, Isabel1; Abril, Meritxell1; Pere Casas-Ruiz, Joan2; Casellas, Maria2; Gomez-Gener, Lluis1; Marce, Rafael2; Menendez, Margarita1; Obrador, Biel1; Sabater, Sergi2,3; von Schiller, Daniel2,4; Acuna, Vicenc2
通讯作者Acuna, Vicenc
来源期刊FRESHWATER BIOLOGY
ISSN0046-5070
EISSN1365-2427
出版年2018
卷号63期号:7页码:613-625
英文摘要

Global change is dramatically altering flow regimes worldwide. Among the most important consequences are the transition of many permanent waterways to temporary waterways, the increase in duration and frequency of non-flow periods of temporary streams, and the increase in the severity (i.e. irradiance, temperature and humidity) of the non-flow period. Nowadays, there is a lack of knowledge on how changes in duration, frequency and severity of the non-flow period will reflect on biodiversity and biogeochemical changes in temporary streams. We designed a manipulative experiment using artificial streams to evaluate the effects of severity of the non-flow period on stream biofilms. Sixteen artificial streams were assigned to four treatments: continuous flow, continuous intermittency and intermittency with and without rain events. Effects were assessed on selected features of stream biofilm structure (i.e. bacterial density and basal fluorescence) and function (photosynthetic efficiency and enzymatic activities), as well as CO2 emissions and dissolved organic matter quantity and quality from water column and sediments. The occurrence of rain events during the non-flow period enhanced organic carbon processing and CO2 emissions to the atmosphere, reducing the sediment reservoir of exportable organic carbon and therefore reducing the dissolved organic carbon exports from streambeds at flow resumption. Given the ongoing reducing trends in the frequency of rain events in semi-arid and arid regions, we expect temporary streams to process and emit less and to export more carbon to downstream systems.


英文关键词CO2 emissions flow intermittency organic carbon stream biofilm temporary streams
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000434110200001
WOS关键词DISSOLVED ORGANIC-MATTER ; CARBON-DIOXIDE EMISSIONS ; SOIL MICROBIAL COMMUNITY ; FRESH-WATER BIODIVERSITY ; GAS-EXCHANGE ; INVERTEBRATE DIVERSITY ; PRECIPITATION PULSES ; CLIMATE-CHANGE ; RESPONSES ; DYNAMICS
WOS类目Ecology ; Marine & Freshwater Biology
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/209396
作者单位1.Univ Barcelona, Dept Evolutionary Biol Ecol & Environm Sci, Barcelona, Spain;
2.Catalan Inst Water Res ICRA, Girona, Spain;
3.Univ Girona, Inst Aquat Ecol, Girona, Spain;
4.Univ Basque Country, Fac Sci & Technol, Bilbao, Spain
推荐引用方式
GB/T 7714
Munoz, Isabel,Abril, Meritxell,Pere Casas-Ruiz, Joan,et al. Does the severity of non-flow periods influence ecosystem structure and function of temporary streams? A mesocosm study[J],2018,63(7):613-625.
APA Munoz, Isabel.,Abril, Meritxell.,Pere Casas-Ruiz, Joan.,Casellas, Maria.,Gomez-Gener, Lluis.,...&Acuna, Vicenc.(2018).Does the severity of non-flow periods influence ecosystem structure and function of temporary streams? A mesocosm study.FRESHWATER BIOLOGY,63(7),613-625.
MLA Munoz, Isabel,et al."Does the severity of non-flow periods influence ecosystem structure and function of temporary streams? A mesocosm study".FRESHWATER BIOLOGY 63.7(2018):613-625.
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