منابع مشابه
Pollination ecology of four epiphytic orchids of New Zealand.
BACKGROUND AND AIMS In New Zealand epiphytic orchids are represented by four genera and eight species. The genera Earina (three species) and Winika (one species) are the most conspicuous and widespread. These are likely to be some of the southernmost distributed genera of epiphytic orchids in the world. METHODS To identify the pollination strategies that have evolved in these orchids, hand-po...
متن کاملPopulation dynamics of epiphytic orchids in a metapopulation context
BACKGROUND AND AIMS Populations of many epiphytes show a patchy distribution where clusters of plants growing on individual trees are spatially separated and may thus function as metapopulations. Seed dispersal is necessary to (re)colonize unoccupied habitats, and to transfer seeds from high- to low-competition patches. Increasing dispersal distances, however, reduces local fecundity and the pr...
متن کاملCollection and trade of wild-harvested orchids in Nepal
BACKGROUND Wild orchids are illegally harvested and traded in Nepal for use in local traditional medicine, horticulture, and international trade. This study aims to: 1) identify the diversity of species of wild orchids in trade in Nepal; 2) study the chain of commercialization from collector to client and/or export; 3) map traditional knowledge and medicinal use of orchids; and 4) integrate the...
متن کاملDo epiphytic orchids behave as metapopulations? Evidence from colonization, extinction rates and asynchronous population dynamics
Previous in situ studies of orchid population dynamics with conservation relevance have focused on one or a few populations in a limited area. Many species of orchids occur as hyperdispersed populations in ephemeral habitats (epiphytic, twig epiphytes, short lived or vulnerable host). In this contribution, we show that orchid populations that are patchily distributed and that exist in disturban...
متن کاملDivergent Adaptive Strategies by Two Co-occurring Epiphytic Orchids to Water Stress: Escape or Avoidance?
Due to the fluctuating water availability in the arboreal habitat, epiphytic plants are considered vulnerable to climate change and anthropogenic disturbances. Although co-occurring taxa have been observed divergent adaptive performances in response to drought, the underlying physiological and morphological mechanisms by which epiphyte species cope with water stress remain poorly understood. In...
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ژورنال
عنوان ژورنال: Banko Janakari
سال: 1970
ISSN: 2631-2301,1016-0582
DOI: 10.3126/banko.v18i2.2173