DOI: 10.1111/gcb.12303
论文题名: Gimme shelter - the relative sensitivity of parasitic nematodes with direct and indirect life cycles to climate change
作者: Molnár P.K. ; Dobson A.P. ; Kutz S.J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 11 起始页码: 3291
结束页码: 3305
语种: 英语
英文关键词: Behavioral thermoregulation
; Complex life cycle
; Host-parasite dynamics
; Metabolic theory of ecology
; Parasitic manipulation
; R 0
; Shelter effect
; Umingmakstrongylus pallikuukensis
Scopus关键词: climate change
; climate effect
; climate prediction
; environmental conditions
; host-parasite interaction
; larva
; life cycle
; metabolism
; nematode
; parasite
; shelter
; thermoregulation
; Nematoda
; Umingmakstrongylus pallikuukensis
; animal
; article
; behavioral thermoregulation
; biological model
; bovids
; climate change
; complex life cycle
; gastropod
; host parasite interaction
; host-parasite dynamics
; larva
; life cycle stage
; metabolic theory of ecology
; nematode
; parasitic manipulation
; parasitology
; physiology
; R 0
; shelter effect
; temperature
; thermoregulation
; Umingmakstrongylus pallikuukensis
; behavioral thermoregulation
; complex life cycle
; host-parasite dynamics
; metabolic theory of ecology
; parasitic manipulation
; R 0
; shelter effect
; Umingmakstrongylus pallikuukensis
; Animals
; Body Temperature Regulation
; Climate Change
; Gastropoda
; Host-Parasite Interactions
; Larva
; Life Cycle Stages
; Models, Biological
; Nematoda
; Ruminants
; Temperature
英文摘要: Climate change is expected to alter the dynamics of host-parasite systems globally. One key element in developing predictive models for these impacts is the life cycle of the parasite. It is, for example, commonly assumed that parasites with an indirect life cycle would be more sensitive to changing environmental conditions than parasites with a direct life cycle due to the greater chance that at least one of their obligate host species will go extinct. Here, we challenge this notion by contrasting parasitic nematodes with a direct life cycle against those with an indirect life cycle. Specifically, we suggest that behavioral thermoregulation by the intermediate host may buffer the larvae of indirectly transmitted parasites against temperature extremes, and hence climate warming. We term this the 'shelter effect'. Formalizing each life cycle in a comprehensive model reveals a fitness advantage for the direct life cycle over the indirect life cycle at low temperatures, but the shelter effect reverses this advantage at high temperatures. When examined for seasonal environments, the models suggest that climate warming may in some regions create a temporal niche in mid-summer that excludes parasites with a direct life cycle, but allows parasites with an indirect life cycle to persist. These patterns are amplified if parasite larvae are able to manipulate their intermediate host to increase ingestion probability by definite hosts. Furthermore, our results suggest that exploiting the benefits of host sheltering may have aided the evolution of indirect life cycles. Our modeling framework utilizes the Metabolic Theory of Ecology to synthesize the complexities of host behavioral thermoregulation and its impacts on various temperature-dependent parasite life history components in a single measure of fitness, R0. It allows quantitative predictions of climate change impacts, and is easily generalized to many host-parasite systems. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62289
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, United States; Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, NM 87501, United States; Department of Ecosystem and Public Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada; Canadian Cooperative Wildlife Health Centre, Alberta Node, Calgary, AB T2N 4Z6, Canada
Recommended Citation:
Molnár P.K.,Dobson A.P.,Kutz S.J.. Gimme shelter - the relative sensitivity of parasitic nematodes with direct and indirect life cycles to climate change[J]. Global Change Biology,2013-01-01,19(11)