نتایج جستجو برای: tropical plants

تعداد نتایج: 262902  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده علوم 1392

the history of plant’s used for mankind is as old as the start of humankind. initially, people used plants for their nutritional proposes but after the discovery of medicinal properties, this natural ?ora became a useful source of disease cure and health improvement across various human communities. berberis vulgaris is one of the medicinal plants used in iranian traditional medicine. berberis ...

2017
Jihong Huang Keping Ma Jianhua Huang

Based on a great number of literatures, we established the database about the Chinese endemic seed plants and analyzed the compositions, growth form, distribution and angiosperm original families of them within three big natural areas and seven natural regions. The results indicate that the above characters of Chinese endemic plants take on relative rule at the different geographical scales. Am...

Journal: :Proceedings. Biological sciences 2016
Urs Kormann Christoph Scherber Teja Tscharntke Nadja Klein Manuel Larbig Jonathon J Valente Adam S Hadley Matthew G Betts

Tropical biodiversity and associated ecosystem functions have become heavily eroded through habitat loss. Animal-mediated pollination is required in more than 94% of higher tropical plant species and 75% of the world's leading food crops, but it remains unclear if corridors avert deforestation-driven pollination breakdown in fragmented tropical landscapes. Here, we used manipulative resource ex...

Journal: :Trends in ecology & evolution 1994
D J Lodge W H McDowell C P McSwiney

Recent research shows that nutrient fluxes are often pulsed In tropical forests, and that pulsed versus gradual inputs have different effects on the fates of nutrients in the ecosystem. Synchrony of nutrient mineralization with plant uptake can lower competition between microbes and plants for limiting nutrients while maintaining tight nutrient cycling, whereas asynchrony can lead to losses of ...

Journal: :Science 2006
Vojtech Novotny Pavel Drozd Scott E Miller Miroslav Kulfan Milan Janda Yves Basset George D Weiblen

Despite recent progress in understanding mechanisms of tree species coexistence in tropical forests, a simple explanation for the even more extensive diversity of insects feeding on these plants has been missing. We compared folivorous insects from temperate and tropical trees to test the hypothesis that herbivore species coexistence in more diverse communities could reflect narrow host specifi...

2011
Godfrey C. Akani

The wet tropical forest is, on the whole, a unique ecosystem in the world that is known to house the absolute highest number of species of both plants and animals. In this regard, it is enough to stress that the total number of flowering plant species currently known around the world is ~250 000, of which ~90 000 are of the rain forests of South America and Central America, and ~30 000 are of t...

Journal: :Annals of botany 2010
Eduardo Narbona Rodolfo Dirzo

BACKGROUND AND AIMS Monoecious plants have the capacity to allocate resources separately to male and female functions more easily than hermaphrodites. This can be advantageous against environmental stresses such as leaf herbivory. However, studies showing effects of herbivory on male and female functions and on the interaction with the plant's pollinators are limited, particularly in tropical p...

Journal: :Journal of Agricultural and Food Chemistry 2001

Journal: :Australian Journal of Biological Sciences 1971

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