منابع مشابه
The relative importance of birds and insects as pollinators of the New Zealand flora
Native birds may have been underestimated as pollinators of the New Zealand flora due to their early decline in abundance and diversity on the mainland. This paper reconsiders the relative importance of birds and insects as pollinators to eight native flowering plants, representing a range of pollination syndromes, on two offshore island refuges. Experimental manipulations were made on five of ...
متن کاملDetection and analysis of endogenous badnaviruses in the New Zealand flora
BACKGROUND AND AIMS Badnaviruses and their host-integrated DNA occur in tropical crops and a few northern temperate species. Following the discovery of a badnavirus on a subantarctic island with floristic links to New Zealand, we postulated that badnaviruses exist in the New Zealand flora. Badnavirus reverse transcriptase (RT) sequences consist of variable regions flanked by highly conserved re...
متن کاملHoneyeaters and the New Zealand Forest Flora: the Utilisation and Profitability of Small Flowers
New Zealand Journal of Ecology (1997) 21(2): 169-179 ©New Zealand Ecological Society visit it without being too easily satiated after one or a few visits (Heinrich & Raven, 1972). Considering that the optimal pollinator is the one that most effectively transfers pollen and produces the maximum seed set over a blooming season (Stebbins, 1970), selection should favour a level of nectar production...
متن کاملReproductive niche conservatism in the isolated New Zealand flora over 23 million years.
The temporal stability of plant reproductive features on islands has rarely been tested. Using flowers, fruits/cones and seeds from a well-dated (23 Ma) Miocene Lagerstätte in New Zealand, we show that across 23 families and 30 genera of forest angiosperms and conifers, reproductive features have remained constant for more than 20 Myr. Insect-, wind- and bird-pollinated flowers and wind- and bi...
متن کاملCoote New Zealand Futures Trust New Zealand
On Media A workshop report from US Institute for Peace examined Arab media, August, 05 (http://usip.org/virtual diplomacy/publications/reports/18.html), with special focus on attitudes to US and to the West. The relevant Arab governments play a double role since mostly, they control the media, where they appease the ideological positions of their own threatening insurgencies while focusing publ...
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ژورنال
عنوان ژورنال: Nature
سال: 1961
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1921108a0