@article {385,
	title = {Measuring and monitoring amphibian diversity in tropical forests. II. Estimating species richness from standardized transect censing},
	journal = {Ecotropica (Bonn)},
	volume = {10},
	number = {2},
	year = {2004},
	month = {04},
	pages = {85-99},
	abstract = {In the face of accelerating declines in amphibian populations, it is crucial to be able to effectively identify conservation priorities, both in terms of species and localities. Rapid assessment of amphibian community structure is therefore essential. Visual encounter Survey (VES) and standardized Visual transect sampling (SVTS) are becoming increasingly important in the measurement and monitoring of tropical anuran communities. In the present paper we compare the performance of SVTS along seven tropical forest transects where frog communities are currently being monitored: Lalut Birai (Borneo, Indonesia), Kakamega Forest National Reserve (Kenya, Africa), Tai National Park (Ivory Coast, Africa; two transects) and Ambolokopatrika-Betaolana Rainforest (Madagascar, three transects). We compared species lists generated from the transects with those from the entire study areas. Species richness was estimated using different incidence- and abundance-based richness estimators: ACE, ICE, Chao1, Chao2, Firsa-order jackknife, Michaelis Menton Estimators (MMMeans and MMRuns). Only, a few transect characteristics had a significant effect on species richness estimate accuracy. Species saturation was significantly enhanced by the number of transect walks (n(counts)). The relative standard deviation of the First-order jackknife estimator significantly decreased with an increasing daily species richness and a combined effect of daily species richness and the overall abundance of frogs. Comparison of transect: and forest: species lists show that terrestrial species are best represented by VES/SVTS. We recommend that a transect census Should be performed on at least 20 independent walks. Different species richness estimators should be applied simultaneously since their behavior/effectiveness under a wide array of transect parameters is still unknown.},
	url = {<Go to ISI>://PREV200510067140},
	author = {Veith, Michael and L{\"o}tters, Stefan and Andreone, Franco and R{\"o}del, Mark-Oliver}
}
@article {167,
	title = {Community assembly and structure of tropical leaf-litter anurans},
	journal = {Ecotropica (Bonn)},
	volume = {12},
	number = {2},
	year = {2006},
	month = {2006},
	pages = {113-129},
	abstract = {We tested two traditional views of community organization relating to the individualistic continuum versus the interactive concept using anuran leaf-litter assemblages in primary and secondary forest habitats in Tai National Park (TNP), Ivory Coast as a model system. Based on biotic data and species occurrence patterns, the relative importance of each of these concepts was assessed. Null model tests of niche and size overlap revealed that the observed multivariate structure was only weakly influenced by biotic interactions, and therefore is most likely not the sole result of present species interactions. Non-metric multidimensional scaling and quadratic regression analyses showed that particular species responded to certain habitat characteristics, in particular the presence or absence of specific breeding sites and tree size classes, the latter being an index of forest degradation in this case. This corresponded to a discrimination of four major functional response groups within the leaf-litter community. However, the strength of these species-specific responses, and therefore the allocation to one or other of these response groups, varied throughout the year. Thus our results indicate that differing individual life histories, rather chair interspecific interactions, were likely explanations of the observed pattern. The leaf-litter anuran assemblages of TNP can be best described as a collection of loosely interacting individuals responding to particular sets of physiological constraints imposed by a particular location, rather than as a tightly integrated and highly interacting set of species.},
	url = {<Go to ISI>://PREV200700085653},
	author = {Ernst, Raffael and R{\"o}del, Mark-Oliver}
}
