NDLI: The importance of limestone bedrock and dissolution karst features on tree root distribution in northern Yucatán, México

Content Provider	Springer Nature Link
Author	Estrada Medina, Héctor Graham, Robert C. Allen, Michael F. Jiménez Osornio, Juan José Robles Casolco, Said
Copyright Year	2012
Abstract	With limited soil depth in northern Yucatán (<30 cm), roots grow deeper through rock fractures and dissolution karst features (i.e., cavities, including soil-filled ones known as soil pockets). We assessed the importance of limestone bedrock and dissolution karst features on tree root growth.Fieldwork was conducted in a limestone quarry where the relative proportions of rock matrix, empty cavities, and soil pockets were calculated by observing recently exposed walls. Physical properties of rocks, topsoil, and soil pockets were analyzed. Root distribution was assessed and roots identified.Soil pockets represented 9% of the rock matrix. The physical properties of rock layers were different with depth. Available water capacity is higher in soil (0.11 m$^{-3}$ m$^{-3}$) than in rock layers (<0.05 m$^{-3}$ m$^{-3}$). But potential available water was much higher in subsurface features than top soil.Dissolution karts features allow roots to grow deep into the bedrock, tapping water stored there. Although the limestone upper layer in northern Yucatan is highly restrictive to root growth, subsurface limestone layers and soil pockets are not restrictive and can hold important amounts of water.
Starting Page	37
Ending Page	50
Page Count	14
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	362
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-03-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Deciduous forest Shallow soils Carbonate soils Carbonate rocks Rock dissolution Soil pockets Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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