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The Biology of Mangroves and Seagrasses, Third Edition$
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Peter J. Hogarth

Print publication date: 2015

Print ISBN-13: 9780198716549

Published to Oxford Scholarship Online: August 2015

DOI: 10.1093/acprof:oso/9780198716549.001.0001

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Mangroves and Their Environment

Mangroves and Their Environment

(p.8) 2 Mangroves and Their Environment
The Biology of Mangroves and Seagrasses, Third Edition

Peter J. Hogarth

Oxford University Press

Mangroves live in waterlogged and anoxic soil, and are exposed to water of high salinity. Oxygen reaches the roots through lenticels in aerial roots and pneumatophores, then passages along aerenchyma tissue. Excess salt is either excluded at the root surface, tolerated by mangrove tissues, sequestered in cell vacuoles, deposited in leaves or bark, or secreted from leaf salt glands. Mangroves are generally nutrient-limited, and nitrate and phosphate are efficiently used and recycled. Reproduction is generally viviparous, with the production of large and robust propagules, which survive demanding intertidal conditions and can disperse over considerable distances.

Keywords:   mangrove, salt tolerance, inorganic nutrients, reproduction, vivipary, propagules, anoxic soil, aerenchyma, pneumatophores, aerial roots

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