DOI: 10.1111/gcb.12084
论文题名: The combined effects of water level reduction and an increase in ammonia concentration on organic matter processing by key freshwater shredders in alluvial wetlands
作者: Dehedin A. ; Maazouzi C. ; Puijalon S. ; Marmonier P. ; Piscart C.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 3 起始页码: 763
结束页码: 774
语种: 英语
英文关键词: Asellus aquaticus
; Feeding activity
; Gammarus pulex
; Gammarus roeseli
; Leaf litter breakdown
; Macrophyte emersion
Scopus关键词: ammonia
; ergosterol
; fresh water
; glycogen
; ammonia
; aquatic plant
; crustacean
; drought
; ecosystem function
; ecosystem response
; feeding behavior
; freshwater
; global change
; macroinvertebrate
; organic matter
; water level
; wetland
; animal
; article
; feeding behavior
; invertebrate
; metabolism
; physiology
; plant leaf
; wetland
; Ammonia
; Animals
; Ergosterol
; Feeding Behavior
; Fresh Water
; Glycogen
; Invertebrates
; Plant Leaves
; Wetlands
; Alnus
; Alnus glutinosa
; Animalia
; Asellus aquaticus
; Berula erecta
; Gammarus
; Gammarus pulex
; Gammarus roeseli
; Invertebrata
英文摘要: In a global change context, the intensity and the frequency of drastic low flow periods or drought events will most likely increase to a substantial extent over the coming decades, leading to a modification in the abiotic characteristics of wetlands. This change in environmental parameters may induce severe shifts in plant and animal communities and the functioning of ecosystems. In this study, we experimentally estimated the effect of drought and the accumulation of ammonia (NH3) on the feeding activities of three generalist macroinvertebrates (i.e. Gammarus pulex, Gammarus roeselii and Asellus aquaticus) on three types of organic matter: leaves of Berula erecta growing in submerged conditions, leaves of the same species growing in emerged conditions and dead leaves of Alnus glutinosa. We observed a modification in the biomechanical and stoichiometric characteristics of the plants as a result of the emersion of the aquatic plants. This shift produced a substantial decrease in organic matter recycling by invertebrates and in their associated physiological ability (i.e. the energy stores of the animals) to face conditions associated with environmental change. Moreover, the accumulation of NH3 amplified the negative effect of emersion. This snowball effect on invertebrates may profoundly modify the functioning of ecosystems, particularly in terms of organic matter production/degradation and carbon mineralization. © 2012 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62500
Appears in Collections: 影响、适应和脆弱性
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作者单位: UMR5023 Ecologie des Hydrosystèmes Naturels et Anthropiséés, Université de Lyon, Université Lyon 1, ENTPE; CNRS, 6 rue Raphaël Dubois, Villeurbanne 69622, France
Recommended Citation:
Dehedin A.,Maazouzi C.,Puijalon S.,et al. The combined effects of water level reduction and an increase in ammonia concentration on organic matter processing by key freshwater shredders in alluvial wetlands[J]. Global Change Biology,2013-01-01,19(3)