The effect of hypoxia and flow decrease in macroinvertebrate functional responses: A trait-based approach to multiple-stressors in mesocosms

被引:38
作者
Calapez, A. R. [1 ,2 ]
Serra, S. R. Q. [2 ]
Santos, J. M. [3 ]
Branco, P. [3 ,4 ]
Ferreira, T. [3 ]
Hein, T. [5 ]
Brito, A. G. [1 ]
Feio, M. J. [2 ]
机构
[1] Univ Lisbon, Sch Agr, LEAF Linking Landscape Environm Agr & Food, Lisbon, Portugal
[2] Univ Coimbra, Dept Life Sci, Fac Sci & Technol, MARE Marine & Environm Sci Ctr, Coimbra, Portugal
[3] Univ Lisbon, Sch Agr, CEF Forest Res Ctr, Lisbon, Portugal
[4] Univ Lisbon, Inst Super Tecn, CERIS, Lisbon, Portugal
[5] Univ Nat Resources & Life Sci, Dept Water Atmosphere & Environm, Inst Hydrobiol & Aquat Ecosyst Management, Vienna, Austria
关键词
Streams; Mediterranean; Hypoxia; Flow velocity; Trait diversity; Ecosystem functions; BIOLOGICAL TRAITS; DISSOLVED-OXYGEN; SPECIES TRAITS; INVERTEBRATE TRAITS; NEW-ZEALAND; BENTHIC-MACROINVERTEBRATES; STREAM MACROINVERTEBRATES; COMMUNITY ECOLOGY; AQUATIC INSECTS; WATER;
D O I
10.1016/j.scitotenv.2018.05.071
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
River ecosystems are most often subject to multiple co-occurring anthropogenic stressors. Mediterranean streams are particularly affected by water scarcity and organic loads that commonly lead to a simultaneous reduction in flow and increasing depletion of dissolved oxygen. In the present study, the single and combined effects of water scarcity (flow velocity reduction) and dissolved oxygen depletion were used to evaluate alterations of drifting macroinvertebrates on a channel mesocosm system, by employing a multiple trait-based approach. Our main findings confirmed that the impact of the two combined stressors can be implicated in alterations of ecosystem functions as result of the changes in proportions of biological traits. Overall, our results showed that, individually, flow velocity reduction and a severe oxygen depletion promoted a shift in community traits. In more detail, biological traits describing the dispersal of organisms and their respiration showed the strongest responses. The respiration mode responded to low flow with drift increase of gill breathers and decrease of individuals with tegument, whereas dispersal was clearly affected by the combination of stressors. Resistance through eggs was higher with the single effect of flow reduction, while swimmers 'relative abundance increased in individuals that drift after exposure to the combination of stressors. Thus, while flow reduction alone is expected to specifically filter out the gill breathers and the egg producers, the combination of stressors will impact more drastically organism's dispersal and swimmers. Such changes in biological traits can result in variations in ecosystem functioning through, for example, local changes in biomass, secondary production, stream metabolism as well as resulting in biodiversity losses or alterations of its distribution patterns. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码:647 / 656
页数:10
相关论文
共 86 条
[1]   Drought and postdrought recovery cycles in an intermittent Mediterranean stream:: structural and functional aspects [J].
Acuña, V ;
Muñoz, I ;
Giorgi, A ;
Omella, M ;
Sabater, F ;
Sabater, S .
JOURNAL OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY, 2005, 24 (04) :919-933
[2]  
Allan J., 1995, Stream Ecology: Structure and Function of Running Waters
[3]   Permutation tests for linear models [J].
Anderson, MJ ;
Robinson, J .
AUSTRALIAN & NEW ZEALAND JOURNAL OF STATISTICS, 2001, 43 (01) :75-88
[4]  
[Anonymous], 2001, ENCY BIODIVERSITY, DOI DOI 10.1016/B0-12-226865-2/00132-2
[5]   Effects of water scarcity and chemical pollution in aquatic ecosystems: State of the art [J].
Arenas-Sanchez, Alba ;
Rico, Andreu ;
Vighi, Marco .
SCIENCE OF THE TOTAL ENVIRONMENT, 2016, 572 :390-403
[6]   Water quality and assessment under scarcity: Prospects and challenges in Mediterranean watersheds [J].
Barcelo, Damia ;
Sabater, Sergi .
JOURNAL OF HYDROLOGY, 2010, 383 (1-2) :1-4
[7]   Long-term seasonal variation in the biological traits of benthic-macroinvertebrates in two Mediterranean-climate streams in California, USA [J].
Bêche, LA ;
McElravy, EP ;
Resh, VH .
FRESHWATER BIOLOGY, 2006, 51 (01) :56-75
[8]   Dispersal in freshwater invertebrates [J].
Bilton, DT ;
Freeland, JR ;
Okamura, B .
ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 2001, 32 :159-181
[9]   Response of community structure to sustained drought in Mediterranean rivers [J].
Boix, Dani ;
Garcia-Berthou, Emili ;
Gascon, Stephanie ;
Benejam, Lluis ;
Tornes, Elisabet ;
Sala, Jordi ;
Benito, Josep ;
Munne, Antoni ;
Sola, Carolina ;
Sabater, Sergi .
JOURNAL OF HYDROLOGY, 2010, 383 (1-2) :135-146
[10]   Taxonomic and biological trait differences of stream macroinvertebrate communities between mediterranean and temperate regions:: implications for future climatic scenarios [J].
Bonada, Nuria ;
Doledec, Sylvain ;
Statzner, Bernhard .
GLOBAL CHANGE BIOLOGY, 2007, 13 (08) :1658-1671