Spatial Patterns in the Distribution of Tropical Tree Species

Condit, Richard; Ashton, Peter S.; Baker, Patrick J.; Bunyavejchewin, Sarayudh; Gunatilleke, Savithri; Gunatilleke, Nimal; Hubbell, Stephen P.; Foster, Robin B.; Itoh, Akira; LaFrankie, James V.; Lee, Hua-Seng; Losos, Elizabeth; Manokaran, N.; Sukumar, Raman; Yamakura, Takuo

doi:10.1126/science.288.5470.1414

Cited by 1,047 publications

(1,261 citation statements)

References 15 publications

Supporting

Mentioning

1,082

Contrasting

Unclassified

Order By: Relevance

“…2d). The relative neighborhood density [48] provides intuitive measurement of the probability for finding a neuron at a certain distance (see ''Experimental'' for details of the algorithm). The probability of finding another neuron on MG decays rapidly as the distance grows, indicating that neurons are highly clustered.…”

Section: Surface Coating Affects Neuron Adhesionmentioning

confidence: 99%

Surface Coating as a Key Parameter in Engineering Neuronal Network Structures In Vitro

et al. 2012

View full text Add to dashboard Cite

By quantitatively comparing a variety of macromolecular surface coating agents, we discovered that surface coating strongly modulates the adhesion and morphogenesis of primary hippocampal neurons and serves as a switch of somata clustering and neurite fasciculation in vitro. The kinetics of neuronal adhesion on poly-lysine-coated surfaces is much faster than that on laminin and Matrigel-coated surfaces, and the distribution of adhesion is more homogenous on poly-lysine. Matrigel and laminin, on the other hand, facilitate neuritogenesis more than poly-lysine does. Eventually, on Matrigel-coated surfaces of self-assembled monolayers, neurons tend to undergo somata clustering and neurite fasciculation. By replacing coating proteins with cerebral astrocytes, and patterning neurons on astrocytes through self-assembled monolayers, microfluidics and micro-contact printing, we found that astrocyte promotes soma adhesion and astrocyte processes guide neurites. There, astrocytes could be a versatile substrate in engineering neuronal networks in vitro. Besides, quantitative measurements of cellular responses on various coatings would be valuable information for the neurobiology community in the choice of the most appropriate coating strategy.

show abstract

Section: Surface Coating Affects Neuron Adhesionmentioning

confidence: 99%

Surface Coating as a Key Parameter in Engineering Neuronal Network Structures In Vitro

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Condit et al 2000). Within this scenario, plot shape has been documented to influence estimates of species richness, i.e.…”

Section: Discussionmentioning

confidence: 99%

Non-woody life-form contribution to vascular plant species richness in a tropical American forest

et al. 2008

View full text Add to dashboard Cite

We provide total vascular plant species counts for three 1-ha plots in deciduous, semi-deciduous and evergreen forests in central Bolivia. Species richness ranged from 297 species and 22,360 individuals/ha in the dry deciduous forest to 382 species and 31,670 individuals/ha in the evergreen forest. Orchidaceae, Pteridophyta and Leguminosae were among the most species-rich major plant groups in each plot, and Peperomia (Piperaceae), Pleurothallis (Orchidaceae) and Tillandsia (Bromeliaceae), all epiphytes, were the most species-rich genera. This dominance of a few but very diverse and/or widespread taxa contrasted with the low compositional similarity between plots. In a neotropical context, these Central Bolivian forest plots are similar in total species richness to other dry deciduous and humid montane forests, but less rich than most Amazonian forests. Nevertheless, lianas, terrestrial herbs and especially epiphytes proved to be of equal or higher species richness than most other neotropical forest inventories from which data are available. We therefore highlight the importance of non-woody life-forms (especially epiphytes and terrestrial herbs) in Andean foothill forest ecosystems in terms of species richness and numbers of individuals, representing in some cases nearly 50% of the species and more than 75% of the individuals. These figures stress the need for an increased inventory effort on non-woody plant groups in order to accurately direct conservation actions. Abstract We provide total vascular plant species counts for three 1-ha plots in deciduous, semideciduous and evergreen forests in central Bolivia. Species richness ranged from 297 species and 22,360 individuals/ha in the dry deciduous forest to 382 species and 31,670 individuals/ha in the evergreen forest. Orchidaceae, Pteridophyta and Leguminosae were among the most species-rich major plant groups in each plot, and Peperomia (Piperaceae), Pleurothallis (Orchidaceae) and Tillandsia (Bromeliaceae), all epiphytes, were the most species-rich genera. This dominance of a few but very diverse and/or widespread taxa contrasted with the low compositional similarity between plots. In a neotropical context, these Central Bolivian forest plots are similar in total species richness to other dry 123Plant Ecol (2009) 201:87-99 DOI 10.1007 deciduous and humid montane forests, but less rich than most Amazonian forests. Nevertheless, lianas, terrestrial herbs and especially epiphytes proved to be of equal or higher species richness than most other neotropical forest inventories from which data are available. We therefore highlight the importance of non-woody life-forms (especially epiphytes and terrestrial herbs) in Andean foothill forest ecosystems in terms of species richness and numbers of individuals, representing in some cases nearly 50% of the species and more than 75% of the individuals. These figures stress the need for an increased inventory effort on non-woody plant groups in order to accurately direct conservation actions.

show abstract

“…Em ecossistemas florestais, as espécies arbóreas apresentam indivíduos que se distribuem no espaço em função da heterogeneidade ambiental (STOYAN;PENTTINEM, 2000), da síndrome de dispersão (CONDIT et al 2000) e de processos dependentes da densidade de indivíduos (HUBBEL, 2005), como por exemplo, a herbivoria e a competição. Nos fragmentos florestais, indivíduos de espécies exigentes em luz, como aquelas do início do processo de sucessão, tendem a ocorrer agrupados nas áreas de clareiras e bordas, formando, assim, um mosaico constituído por trechos em diferentes estádios sucessionais.…”

Section: Introductionunclassified

Associações espaciais entre indivíduos de diferentes espécies de Miconia spp. Ruiz & Pav. (Melastomataceae)

et al. 2011

View full text Add to dashboard Cite

Este estudo avaliou as associações espaciais de indivíduos pertencentes a todas as espécies arbóreas do gênero Miconia presentes no sub-bosque de um plantio experimental de espécies dos gêneros Eucalyptus e Corymbia. Como o gênero Miconia possui a maioria das espécies pioneiras, a hipótese testada foi de que os pares de espécies analisadas apresentam indivíduos com sobreposição total ou parcial de habitat. Considerando o histórico da área, é possível supor que todos os indivíduos se regeneraram a partir da chuva e do banco de sementes. Foi estabelecido um transecto cruzando a área de estudo no sentido de seu maior comprimento, a partir do qual foram determinadas as coordenadas dos indivíduos do gênero Miconia com DAS (diâmetro medido na altura do solo) maior ou igual a 1 cm. As associações espaciais entre os indivíduos das diferentes espécies foram analisadas por meio da função K de Ripley bivariada. Foram amostrados indivíduos de Miconia pepericarpa DC., Miconia sellowiana Naudin, Miconia albicans Triana, Miconia argyrophylla DC., Miconia chartacea Triana e Miconia cinnamomifolia (DC.) Naudin. De forma geral, os resultados demonstraram ausência de associação espacial negativa entre os pares das espécies, indicando que os indivíduos de Miconia spp. compartilham parcial ou totalmente o mesmo espaço no sub-bosque de um plantio de eucalipto. Os resultados obtidos, apesar de não poderem ser extrapolados para outras espécies, corroboram a ideia de que algumas espécies pioneiras tendem a coexistir, em florestas tropicais, em áreas onde há maior disponibilidade de luz.

show abstract

Spatial Patterns in the Distribution of Tropical Tree Species

Cited by 1,047 publications

References 15 publications

Surface Coating as a Key Parameter in Engineering Neuronal Network Structures In Vitro

Surface Coating as a Key Parameter in Engineering Neuronal Network Structures In Vitro

Non-woody life-form contribution to vascular plant species richness in a tropical American forest

Associações espaciais entre indivíduos de diferentes espécies de Miconia spp. Ruiz & Pav. (Melastomataceae)

Contact Info

Product

Resources

About