Results 271 to 280 of about 79,905 (304)

Pervasive within-species spatial repulsion among adult tropical trees

Science, 2023
For species to coexist, performance must decline as the density of conspecific individuals increases. Although evidence for such conspecific negative density dependence (CNDD) exists in forests, the within-species spatial repulsion it should produce has rarely been demonstrated in adults.
Michael Kalyuzhny, Jeffrey K. Lake, S. Joseph Wright, Annette M. Ostling   +3 more
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Widespread herbivory cost in tropical nitrogen-fixing tree species

Nature, 2022
Recent observations suggest that the large carbon sink in mature and recovering forests may be strongly limited by nitrogen1-3. Nitrogen-fixing trees (fixers) in symbiosis with bacteria provide the main natural source of new nitrogen to tropical forests3,4.
Will Barker, Liza S. Comita, S. Joseph Wright, Oliver L. Phillips, Brian E. Sedio, Sarah A. Batterman   +5 more
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Towards quantifying tropical tree species richness in tropical forests

International Journal of Remote Sensing, 2009
This letter reports tests of whether the normalized difference vegetation index (NDVI) from Landsat Enhanced Thematic Mapper Plus (ETM+) and radar backscatter (C-, L-and P-bands) from Airborne Synthetic Aperture Radar (AIRSAR) imagery can be used to estimate tree species richness from 25 1-ha plots within continuous lowland forest types (dry, moist ...
T. W. Gillespie, S. Saatchi, S. Pau, S. Bohlman, A. P. Giorgi, S. Lewis   +5 more
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Tree fallows: A comparison between five tropical tree species

Biology and Fertility of Soils, 1996
The natural abundance of 15N and 13C, conventional soil analyses, and biomass production by maize were used to study the influence of five tropical tree species on soils and their fertility. The experiment was conducted in Morogoro, Tanzania, to compare Cassia (Senna) siamea, Eucalyptus camaldulensis, E.
K. Jonsson, L. St�hl, P. H�gberg
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MICROPROPAGATION OF TROPICAL TREE SPECIES

Acta Horticulturae, 2013
Tree species are important in tropical regions as a source of timber, nutrition, medicine, fuel, income and livestock food. Many vegetable species are not adapted to production in tropical climates, further highlighting the importance of tropical fruit species in these regions.
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TROPICAL RAINFOREST GAPS AND TREE SPECIES DIVERSITY

Annual Review of Ecology and Systematics, 1987
Evolutionary hypotheses about how so many species of tropical rainforest trees might have arisen include (a) genetic drift (71), (b) habitat specialization (8) in benign environments, or (c) repeated geographic isolation followed by remixing of species during Pleistocene climatic fluctuations (144).
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Seedling Traits Determine Drought Tolerance of Tropical Tree Species

Biotropica, 2008
ABSTRACTWater availability is the most important factor determining tree species distribution in the tropics, but the underlying mechanisms are still not clear. In this study, we compared functional traits of 38 tropical tree species from dry and moist forest, and quantified their ability to survive drought in a dry‐down experiment in which wilting and
Poorter, L., Markesteijn, L.
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CpDNA-based species identification and phylogeography: application to African tropical tree species. [PDF]

Molecular ecology, 2010
Despite the importance of the African tropical rainforests as a hotspot of biodiversity, their history and the processes that have structured their biodiversity are understood poorly. With respect to past demographic processes, new insights can be gained through characterizing the distribution of genetic diversity.
Duminil, J., Heuertz, Myriam, Doucet, J.-L., Bourland, N., Cruaud, Corinne, Gavory, Frédérick, Doumenge, C., Navascués, Miguel, Hardy, O. J.   +8 more
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Recruitment in Tropical Tree Species: Revealing Complex Spatial Patterns

The American Naturalist, 2009
Seed dispersal should leave a signature on the spatial distribution of recruits that can be quantified using sophisticated techniques of spatial pattern analysis. Here we study spatial patterns of five frugivore-dispersed tropical tree species at the Barro Colorado Island forest, Panama, to describe detailed properties of the spatial patterns of ...
Thorsten Wiegand, Isabel Martínez, Andreas Huth   +2 more
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Allometric equations for four valuable tropical tree species

Forest Ecology and Management, 2006
Four tree species were harvested periodically over a 13-year period from plantations in the humid lowlands of Costa Rica: Cedrela odorata, Cordia alliodora, Hyeronima alchorneoides, and Euterpe oleracea. The soil was a well-drained, volcanic alluvium, and high fertility coupled with 4 m of annual rainfall and high temperatures led to rapid growth rates;
Thomas G. Cole, John J. Ewel
openaire   +1 more source