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	Stable isotope analysis of diet confirms niche separation of two sympatric species of Namib Desert lizard
	Murray Ian W; Lease Hilary M; Hetem Robyn S; Mitchell Duncan; Fuller Andrea; Woodborne Stephan
来源期刊	Integrative Zoology
ISSN	1749-4869
出版年	2016
卷号	11 期号:1 页码:60-75
英文摘要	We used stable isotopes of carbon and nitrogen to study the trophic niche of two species of insectivorous lizards, the Husab sand lizard Pedioplanis husabensis and Bradfield's Namib day gecko living sympatrically in the Namib Desert. We measured the delta~(13)C and delta~(15)N ratios in lizard blood tissues with different turnover times(whole blood, red blood cells and plasma) to investigate lizard diet in different seasons. We also measured the delta~(13)C and delta~(15)N ratios in available arthropod prey and plant tissues on the site, to identify the avenues of nutrient movement between lizards and their prey. Through the use of stable isotope mixing models, we found that the two lizard species relied on a largely non-overlapping but seasonally variable array of arthropods: P. husabensis primarily fed on termites, beetles and wasps, while R. bradfieldi fed mainly on ants, wasps and hemipterans. Nutrients originating from C_3 plants were proportionally higher for R. bradfieldi than for P. husabensis during autumn and late autumn/early winter, although not summer. Contrary to the few available data estimating the trophic transfer of nutrients in ectotherms in mixed C_3 and C_4/crassulacean acid metabolism (CAM) plant landscapes, we found that our lizard species primarily acquired nutrients that originated from C_4/CAM plants. This work adds an important dimension to the general lack of studies using stable isotope analyses to estimate lizard niche partitioning and resource use.
英文关键词	Namib Desert niche partitioning Pedioplanis Rhoptropus stable isotopes
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5831788
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335724
作者单位	Murray Ian W, Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.; Lease Hilary M, Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.; Hetem Robyn S, Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.; Mitchell Duncan, Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.; Fuller Andrea, Brain Function Research Group, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.; Woodborne Stephan, iThemba Laboratories, Gauteng, South Africa.
推荐引用方式 GB/T 7714	Murray Ian W,Lease Hilary M,Hetem Robyn S,et al. Stable isotope analysis of diet confirms niche separation of two sympatric species of Namib Desert lizard[J],2016,11(1):60-75.
APA	Murray Ian W,Lease Hilary M,Hetem Robyn S,Mitchell Duncan,Fuller Andrea,&Woodborne Stephan.(2016).Stable isotope analysis of diet confirms niche separation of two sympatric species of Namib Desert lizard.Integrative Zoology,11(1),60-75.
MLA	Murray Ian W,et al."Stable isotope analysis of diet confirms niche separation of two sympatric species of Namib Desert lizard".Integrative Zoology 11.1(2016):60-75.