DOI: 10.1111/gcb.14312
Scopus记录号: 2-s2.0-85051473729
论文题名: Coastal ecosystems on a tipping point: Global warming and parasitism combine to alter community structure and function
作者: Mouritsen K.N. ; Sørensen M.M. ; Poulin R. ; Fredensborg B.L.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 9 起始页码: 4340
结束页码: 4356
语种: 英语
英文关键词: amphipod host community
; climate change
; Maritrema novaezealandensis
; mesocosm experiment
; microphallid trematode
; parasite vulnerability
; species diversity
; species richness
; temperature sensitivity
; temperature–parasitism synergy
Scopus关键词: Amphipoda
; Maritrema
; Maritrema novaezealandensis
; Microphallidae
; Trematoda
英文摘要: Mounting evidence suggests that the transmission of certain parasites is facilitated by increasing temperatures, causing their host population to decline. However, no study has yet addressed how temperature and parasitism may combine to shape the functional structure of a whole host community in the face of global warming. Here, we apply an outdoor mesocosm approach supported by field surveys to elucidate this question in a diverse intertidal community of amphipods infected by the pathogenic microphallid trematode, Maritrema novaezealandensis. Under present temperature (17°C) and level of parasitism, the parasite had little impact on the host community. However, elevating the temperature to 21°C in the presence of parasites induced massive structural changes: amphipod abundances decreased species-specifically, affecting epibenthic species but leaving infaunal species largely untouched. In effect, species diversity dropped significantly. In contrast, four degree higher temperatures in the absence of parasitism had limited influence on the amphipod community. Further elevating temperatures (19–25°C) and parasitism, simulating a prolonged heat-wave scenario, resulted in an almost complete parasite-induced extermination of the amphipod community at 25°C. In addition, at 19°C, just two degrees above the present average, a similar temperature–parasite synergistic impact on community structure emerged as seen at 21°C under lower parasite pressure. The heat-wave temperature of 25°C per se affected the amphipod community in a comparable way: species diversity declined and the infaunal species were favoured at the expense of epibenthic species. Our experimental findings are corroborated by field data demonstrating a strong negative relationship between current amphipod species richness and the level of Maritrema parasitism across 12 sites. Hence, owing to the synergistic impact of temperature and parasitism, our study predicts that coastal amphipod communities will deteriorate in terms of abundance and diversity in face of anticipated global warming, functionally changing them to be dominated by infaunal species. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110257
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Biosciences, Aquatic Biology, Aarhus University, Aarhus, Denmark; Department of Zoology, Otago University, Dunedin, New Zealand; Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark
Recommended Citation:
Mouritsen K.N.,Sørensen M.M.,Poulin R.,et al. Coastal ecosystems on a tipping point: Global warming and parasitism combine to alter community structure and function[J]. Global Change Biology,2018-01-01,24(9)