Skip to main content Accessibility help
×
Hostname: page-component-77c78cf97d-9dm9z Total loading time: 0 Render date: 2026-04-24T16:39:45.230Z Has data issue: false hasContentIssue false

5 - Fern adaptations to xeric environments

Published online by Cambridge University Press:  05 June 2012

Peter Hietz
Affiliation:
University of Natural Resources and Applied Life Sciences (BOKU)
Klaus Mehltreter
Affiliation:
Instituto de Ecologia, A.C., Xalapa, Mexico
Lawrence R. Walker
Affiliation:
University of Nevada, Las Vegas
Get access

Summary

Key points

  1. 1. Ferns are most prominent in shady and humid environments, but many species are also found in drought-prone habitats, either (semi) arid ecosystems or locations with discontinuous water supply within otherwise humid ecosystems. These locations include tree branches and rocks, both substrates with little water storage capacity.

  2. 2. Drought tolerance is gained through adaptations in water uptake, water loss, water storage and, in many ferns, desiccation tolerance, a feature that ferns share with other cryptogams. The little information available on the cuticle's efficiency to limit water loss suggests that it may be similar to other vascular plants. Thus many xerophytic ferns, while tolerating desiccation, normally avoid it through low cuticular and stomatal water loss and may not be considered truly poikilohydric. Exceptions are filmy ferns with very little control of water loss and whose water relations are akin to mosses rather than vascular plants.

  3. 3. Other adaptations found in xerophytic ferns include photoprotection with pigments, antioxidants, dense indument, leaf curling and drought avoidance by shedding leaves in the dry season. Crassulacean acid metabolism (CAM) is a common adaptation of xerophytic angiosperms, but is very rare in ferns. Succulence is not strongly developed in xerophytic ferns.

  4. 4. Drought adaptations of ferns are analyzed in light of their phylogenetic positions and compared with those of angiosperms. This chapter discusses the potentially underlying causes of drought tolerance in ferns and points to gaps in our understanding as well as possible future research.

Information

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Book purchase

Temporarily unavailable

Save book to Kindle

To save this book to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

Available formats
×