cycad populations

Listing 1 - 10 from 16 for cycad populations

LIVING FOSSILS AT PALOMAR COLLEGE
... they once represented a dominant and very successful plant line, many of today's relict cycad populations are seriously threatened with extinction due to extensive collecting and diminishing habitats. Indeed, the plight ... , oak, willow, ash and maple. In fact, one hypothesis to explain the demise of dinosaur populations by the end of the Cretaceous Period (65 million years ago) is that slow-growing ...
waynesword.palomar.edu

Continental Drift & Plant Distribution
... and very successful plant line during the days of dinosaurs, many of today's relict cycad populations are seriously threatened with extinction due to extensive collecting and diminishing habitats. Indeed, the ... In fact, the latter species or its ancestral progenitor may have given rise to native populations of E. tahitensis on Tahiti or possibly wiliwili (E. sandwicensis) on the Hawaiian Islands. ...
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Cycad International : Katherine NT Australia
... roads and highways can pose significant threats to cycad populations, and may even be a real danger to the survival of localised populations or rare species. The indiscriminate and increasingly ... immaterial, because the resultant loss of a specific pollinating vector means that the remaining cycad populations cannot increase naturally and are therefore unviable. The Role of LegislationThe trade in ...
www.cycadinternational.com.au

Cycad conservation, Article 4
... cycad habitats are being destroyed. In some countries, the forests are being clear cut for timber, with no regard for the other plants in the area. In many countries, small populations ... have the best direct influence to save the cycad populations. One project headed by Andrew Vovides in Mexico, ... This will reduce the pressure from the wild populations, at least from poaching. Many of the botanical ...
www.plantapalm.com

Cycad conservation, Article 7
... from every known cycad locality and established in orchards, each of which would be representative of a particular locality. For instance, the three known populations of E. lebomboensis ... Garden works closely with the Transvaal Nature Conservation authorities who monitor the status of cycad populations in the wild, determine which require augmentation with nursery-grown plants and eventually ...
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The Cycad Pages
... Tranes internatus causes sporadic deaths in wild Macrozamia populations, the larvae eating out the entire caudex. This insect has been introduced into cycad collections in Australia, USA and South Africa ... larvae of many species of insects, especially moths butterflies and beetles can seriously damage cycad plants by attacking emerging fronds. This immediately renders the plants unattractive, and in ...
plantnet.rbgsyd.nsw.gov.au

The Cycad Pages
... that nearly all cycad symbionts are from the genus Nostoc, cyanobiont populations have been shown to be species diverse between different cycad genera, and even within a single cycad individual. Several studies have shown a mixture of Nostoc strains can inhabit the root system of a single plant. In contrast, populations ...
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Cycad Society of South Africa: Book Reviews
... features during their 250-million-year evolutionary history. Many cycad species exist today only as small, poorly-known or isolated populations or as ornamental species in botanic gardens. In order to understand fully, as well as to conserve, this internationally endangered tropical plant group, it is paramount that cycad ...
www.cycadsociety.org

Cycad International : Katherine NT Australia
... according to environmental conditions, occasionally approaching 2 metres in length. Longer leaves occur in populations growing in the shade of woodlands. The cones of Stangeria are borne singly on ... small cones. See Individual Plants & Request Quote See Related Gallery Images Back to Top Cycad International/Cycad Gardens Nursery. www.cycadinternational.com.au Phone: +61 8 8971 0335 Fax : +61 ...
www.cycadinternational.com.au

Cycad Society of South Africa: Book Reviews
... books without understanding the issue, and secondly that by Vorster in Walters & Osborne's Cycad classification concepts pages 69—83 (2004) in which available information but especially spatial ... . However, the matter is not so simple because of geographically and morphologically intermediate populations. Their respective maps of the distribution of Dracostrobus ghellinckii and D. mkomaasiana show ...
www.cycadsociety.org

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