Stomatal density and stomatal index of fossil Buxus from coprolites of extinct Myotragus balearicus Bate (Artiodactyla, Caprinae) as evidence of increased CO2 concentration during the late Holocene

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	Stomatal density and stomatal index of fossil Buxus from coprolites of extinct Myotragus balearicus Bate (Artiodactyla, Caprinae) as evidence of increased CO2 concentration during the late Holocene
	Rivera, L; Baraza, E; Alcover, JA; Bover, P; Rovira, CM; Bartolome, J
	2014
Source Publication	HOLOCENE
ISSN	0959-6836
Volume	24 Issue:7 Pages:876-880
Abstract	Stomatal density of plants may vary depending on environmental factors, such as CO2 concentration. Under the current atmospheric conditions, it is expected that leaves have different stomatal density than they had hundreds or thousands of years ago, due to the rise in CO2 in the atmosphere. Coprolites of the extinct Myotragus balearicus from Cova Estreta (Pollenca, Mallorca), with a radiocarbon age of 3775-3640 cal. BC, have been used to study the diet of this bovid. A significant amount of epidermal fragments of Buxus was found in the faecal material. Three coprolites were used to estimate the stomatal density and stomatal index of Buxus epidermal fragments from this period. Samples of the endangered Buxus balearica, the sole species of Buxus currently present on Mallorca, and samples of the Buxus sempervirens, present in the nearest mainland, were also collected in different locations. Leaves were examined using microscopy to determine and compare the stomatal density and stomatal index between current plant material and coprolite material. The results indicated a higher value for stomatal index (12.71) and stomatal density (297.61 stomata/mm(2)) in leaves from the coprolites versus leaves of the living B. balearica and B. sempervirens species (7.99 and 227.77 stomata/mm(2) respectively). These results could provide a palaeobotanic evidence of a change in atmospheric CO2 concentration since mid-Holocene in the Mediterranean basin.
Keyword	Atmospheric Co2 Carbon-dioxide Islands Leaves Climate Diet
Language	英语
Document Type	期刊论文
Identifier	https://ir.xtbg.ac.cn/handle/353005/9113
Collection	文献共享
Recommended Citation GB/T 7714	Rivera, L,Baraza, E,Alcover, JA,et al. Stomatal density and stomatal index of fossil Buxus from coprolites of extinct Myotragus balearicus Bate (Artiodactyla, Caprinae) as evidence of increased CO2 concentration during the late Holocene[J]. HOLOCENE,2014,24(7):876-880.
APA	Rivera, L,Baraza, E,Alcover, JA,Bover, P,Rovira, CM,&Bartolome, J.(2014).Stomatal density and stomatal index of fossil Buxus from coprolites of extinct Myotragus balearicus Bate (Artiodactyla, Caprinae) as evidence of increased CO2 concentration during the late Holocene.HOLOCENE,24(7),876-880.
MLA	Rivera, L,et al."Stomatal density and stomatal index of fossil Buxus from coprolites of extinct Myotragus balearicus Bate (Artiodactyla, Caprinae) as evidence of increased CO2 concentration during the late Holocene".HOLOCENE 24.7(2014):876-880.

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