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The PREDICTS project-Projecting Responses of Ecological Diversity In Changing Terrestrial Systems (www.predicts.org.uk)-has collated from published studies a large, reasonably representative database of comparable samples of biodiversity from multiple sites that differ in the nature or intensity of human impacts relating to land use. We have used this evidence base to develop global and regional statistical models of how local biodiversity responds to these measures. We describe and make freely available this 2016 release of the database, containing more than 3.2 million records sampled at over 26,000 locations and representing over 47,000 species. We outline how the database can help in answering a range of questions in ecology and conservation biology. To our knowledge, this is the largest and most geographically and taxonomically representative database of spatial comparisons of biodiversity that has been collated to date; it will be useful to researchers and international efforts wishing to model and understand the global status of biodiversity.
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*En hemeroteca, SIBE-San Cristóbal | |
Functional diversity of soil bacterial communities in the Tabonuco forest: interaction of anthropogenic and natural disturbance | |
Willig, Michael R. ; Moorhead, Daryl L. (coaut.) ; Cox, Stephen B. (coaut.) ; Zak, John C. (coaut.) ; | |
Contenido en: Biotropica Vol. 28, no. 4a (December 1996), p. 471-483 ISSN: 0006-3606 | |
Bibliotecas:
San Cristóbal
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Nota: | En hemeroteca, SIBE-San Cristóbal |
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*En hemeroteca, SIBE-San Cristóbal | |
The legacy of disturbance on habitat associations of terrestrial snails in the Luquillo experimental forest, Puerto Rico | |
Secrest, Michele F. ; Willig, Michael R. (coaut.) ; Peppers, Lottie L. (coaut.) ; | |
Contenido en: Biotropica Vol. 28, no. 4a (December 1996), p. 502-514 ISSN: 0006-3606 | |
Bibliotecas:
San Cristóbal
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Nota: | En hemeroteca, SIBE-San Cristóbal |
A pesar que el rol del disturbio y su efecto sobre la abundancia y distribución de organismos se ha tornado más claro en los años recientes, escasa investigación se ha centrado en la consecuencia de disturbios grandes pero infrecuentes, especialmente desde la perspectiva de las asociaciones de hábitat animal. En 1989, el Huracán Hugo causó daño considerable al Bosque Experimental Luquillo de Puerto Rico, con el grado de disturbio fuertemente afectado por la topogeografía. Se examinaron la abundancia, distribución y asociaciones de hábitat de cuatro especies de caracoles terrestres (Caracolus caracolla, Nenia tridens, Gaeotis nigrolineata, Polydontes acutangula) en el bosque de tabonuco en dos sitios (El Verde y Bisley) que fueron dañados diferentemente por el huracán. Cinco años después del impacto del Huracán Hugo, persistían diferencias significativas en densidad entre los sitios para todos los caracoles excepto P. acutangula
Despite recent studies of the effect of disturbance on the abundance and distribution of organisms, little research has focused on the legacy of infrequent and large scale disturbance, especially from the perspective of habitat associations of animals. In 1989, Hurricane Hugo caused considerable damage to the Luquillo Experimental forest of Puerto Rico, with the degree of disturbance strongly affected by topogeographic consideration. We examined the abundance, distribution, and habitat associations of four species of land snail (Caracolus caracolla, Nenia tridens, Gaeotis nigrolineata, Polydontes acutangula) in the tabonuco forest at two sites (El Verde and Bisley) which were differentially damaged by the hurricane.
Five years after the impact of Hurricane Hugo, significant differences between sites in density persisted for all snails except P. acutangula. Moreover, significant differences in habitat characteristics (central tendency and dispersion) were detected between El Verde and Bisley based on univariate and multivariate analyses of a suite of 31 abiotic and biotic variables. Despite these differences, the basis of habitat associations for each snail did not differ between sites. The factors that affected microspatial differences in snail density within sites accounted for differences in density between sites. Insight derived from research conducted at a single location (e.g., El Verde), adequately accounted for patterns of variation at another site (e.g., Bisley), even though differences between sites in the extent and severity of damage were well-documented. We hypothesize that the absence of scale-dependence with regard to habitat selection exists because the association among abiotic and biotic variables (character correlation matrix) within sites was not altered differentially by the hurricane or has recovered to a similar state as a consequence of secondary succession
Además, se detectaron diferencias significativas en características de hábitat (tendencia central y dispersión) entre El Verde y Bisley basadas en análisis univariado y mutivariado de un conjunto de 31 variables abióticas y bióticas. A pesar de las diferencias, la base de la asociación de hábitat para cada especie de caracol no fue distinta entre sitios. Los factores que afectan las diferencias microespaciales en la densidad de caracoles dentro de cada sitio resulta en diferencias en densidad entre sitios. La percepción derivada de la investigación realizada en un sitio en particular (e.j., El Verde) explica adecuadamente los patrones de variación en el otro sitio (e.j., Bisley), a pesar que las diferencias en la extensión y severidad del daño están bien documentadas. Hipotetizamos que la ausencia de una dependencia de escala con respecto a la selección de hábitat persiste porque la asociación entre variables bióticas y abióticas (matriz de correlación de caracteres) dentro de los sitios no fue alterada diferencialmente por el huracán o se ha recuperado a un estado similar como consecuencia de sucesión secundaria
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*En hemeroteca, SIBE-San Cristóbal | |
The effects of hurricane Hugo on bats of the luquillo experimental forest of Puerto Rico | |
Gannon, Michael R. ; Willig, Michael R. (coaut.) ; | |
Contenido en: Biotropica Vol. 26, no. 3 (September 1994), p. 320-331 ISSN: 0006-3606 | |
Bibliotecas:
San Cristóbal
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Nota: | En hemeroteca, SIBE-San Cristóbal |
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*En hemeroteca, SIBE-San Cristóbal | |
The effect of hurricane Hugo on six invertebrate species in the luquillo experimental forest of Puerto Rico | |
Willig, Michael R. ; Camilo, Gerardo R. (coaut.) ; | |
Contenido en: Biotropica Vol. 23, no. 4a (December 1991), p. 455-461 ISSN: 0006-3606 | |
Bibliotecas:
San Cristóbal
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Nota: | En hemeroteca, SIBE-San Cristóbal |