@article {1788,
	title = {Forecasting insect species richness scores in poorly surveyed territories: the case of the Portuguese dung beetles (Col. Scarabaeinae)},
	journal = {Biodiversity and Conservation},
	volume = {10},
	number = {8},
	year = {2001},
	note = {457WMBIODIVERS CONSERV},
	month = {Aug},
	pages = {1343-1367},
	abstract = {Large-scale biodiversity assessment of faunal distribution is needed in poorly sampled areas. In this paper, Scarabaeinae dung beetle species richness in Portugal is forecasted from a model built with a data set from areas identified as well sampled. Generalized linear models are used to relate the number of Scarabaeinae species in each Portuguese UTM 50 x 50 grid square with a set of 25 predictor variables (geographic, topographic, climatic and land cover) extracted from a geographic information system (GIS). Between-squares sampling effort unevenness, spatial autocorrelation of environmental data, non-linear relationships between variables and an assessment of the models{\textquoteright} predictive power, the main shortcomings in geographic species richness modelling, are addressed. This methodological approach has proved to be reliable and accurate enough in estimating species richness distribution, thus providing a tool to identify areas as potential targets for conservation policies in poorly inventoried countries.},
	keywords = {species richness sampling dung beetles},
	url = {<Go to ISI>://000170159900008},
	author = {Hortal, J. and Lobo, J. M. and Martin-Piera, F.}
}
@article {1935,
	title = {Between-group differences in the Iberian dung beetle species-area relationship (Coleoptera : Scarabaeidae)},
	journal = {Acta Oecologica-International Journal of Ecology},
	volume = {20},
	number = {6},
	year = {1999},
	month = {Nov-Dec},
	pages = {587-597},
	abstract = {Between-group alpha- and beta-diversity differences were derived from species-area relationships fitted to field data. The accuracy of spatial richness variation predictions based on area size was also checked. The log-log model (log S = c + z log A) was found to be the best-fit linear model, with slopes (z) ranging from 0.089 to 0.142. Between-group comparisons of z (slope) and q (intercept) parameters, using the S = q + cA(Z) curvilinear regression model, corroborated early results, indicating a lower beta-diversity (slope) for Scarabaeinae than for Geotrupinae and Aphodiinae. The latter group, probably more sensitive to environmental heterogeneity, should contribute more to species richness in large areas. alpha-Diversity is greater for Aphodiinae, more relevant to local diversity (1 km(2)), than for Scarabaeinae and considerably greater for these two groups than for Geotrupinae. As earlier results show that the richness of a single dung pat is rather more a function of the Scarabaeinae species pool, richness on dung pat scales is probably due more to the between-dropping mobile Scarabaeinae, while Aphodiinae contribute mainly to local and regional pool richness. Nearly 88 \% of the total richness variance is explained by area size. This percentage decreases to 37 \% when the spatial structure of area size and species number are extracted. The corresponding figures for Scarabaeinae, Aphodiinae and Geotrupinae are 44, 22 and 31 \%, respectively. (C) 1999 Editions scientifiques et medicales Elsevier SAS.},
	keywords = {APHODIUS SCARABAEIDAE, beta-diversity, CURVES, diversity, Dung beetles, Iberian, Peninsula, richness comparison, Scarabaeidae, species-area},
	url = {<Go to ISI>://000084618100002 },
	author = {Lobo, J. M. and Martin-Piera, F.}
}
@article {1936,
	title = {Searching for a predictive model for species richness of Iberian dung beetle based on spatial and environmental variables},
	journal = {Conservation Biology},
	volume = {16},
	number = {1},
	year = {2002},
	note = {digital copy},
	month = {Feb},
	pages = {158-173},
	abstract = {In Mediterranean countries, inventories of many animal groups particularly insects, are incomplete or nonexistent. Hence, a feasible spatial picture of unequally surveyed areas is required to ascertain which faunistic surveys are good enough to produce reliable estimates of species richness. We used generalized linear models to build a multiple-regression function through which we predicted the distribution of Iberian dung beetle species richness. Given the scarcity and unevenness of the species-richness spatial distribution, the number of records of a dung beetle database (BANDASCA), falling within each of the 50 x 50 km grid squares, was chosen as a measure of the sampling effort for that square. Examining the asymptotic relationship between the number of dung-beetle species and database records for each physioclimatic Iberian subregion, we found that 82 grid squares (32\% of the total) were adequately sampled. Dung-beetle species richness was related in each of these 82 cells to 24 explanatory variables. Curvilinear functions, interaction terms, and the significant third-degree polynomial terms of latitude and longitude were included to model species-richness distribution. The final model accounted for 62.4\% of the total deviance after we eliminated seven outlier squares, with maximum elevation, grassland area, land-use diversity, forest area, geological diversity, interaction of terrestrial area and maximum elevation, and interaction between calcareous rock, and geological diversity and latitude being the most significant independent variables. The residuals of the function were not spatially autocorrelated, and we validated the final model by a jackknife procedure. Large and environmentally complex hotspots in the Iberian Central, Baetic, and Subbaetic mountain ranges stand out from the emerging map of species richness. Further detailed research is required to determine the complementarity of the faunas of these two main hotspots, the key question in conservation planning for a dung-feeding beetle.},
	keywords = {Africa, atlas, autocorrelation, biodiversity, butterflies, communities, conservation, insects, patterns, plants},
	url = {<Go to ISI>://000173726400016},
	author = {Lobo, J. M. and Martin-Piera, F.}
}
@article {1977,
	title = {A comparative discussion of trophic preferences in dung beetle communities},
	journal = {Miscellania Zoologica Barcelona},
	volume = {19},
	number = {1},
	year = {1996},
	note = {requested 1/6},
	month = {1996},
	pages = {13-31},
	abstract = {Available information on trophic preferences of dung beetles (Scarabaeoidea) in different biogeographic regions is reviewed. Trophic resource partitioning in a dung beetle (Coleoptera, Scarabaeoidea) community in the "Parque Nacional de Donana", Spain, was also studied, using nine different kinds of wild and domestic vertebrate excrement as trap bait. Undifferentiated attraction to human and herbivore faeces was noted. Human and domestic ungulate faeces was colonized by a richer fauna than that of wild herbivores, which was not the specialized trophic adaptation of any species. Although polyphagy is the most common feeding behaviour, the excrement of carnivores and other omnivores was hardly colonized. This pattern differs from that of other biogeographic regions. Negligible importance of the trophic dimension on the structure of these communities may be due to the early presence of man in the Palaearctic Region. Nevertheless, human interference alone cannot have led to an absence of true polyphagy (undifferentiated attraction to all kinds of faeces). Further research is suggested, aimed at determining whether observed resource partitioning in dung beetles communities is a consequence of human colonization or is a pre-Neolithic evolutionary event.},
	keywords = {Animalia-, Arthropoda-, Behavior-, Chordata-, Coleoptera-: Insecta-, Digestive-System (Ingestion-and-Assimilation), dung-beetles (Coleo, Ecology- (Environmental-Sciences), Hominidae-: Primates-, Invertebrata-, Mammalia-, Nutrition-, Vertebrata-},
	author = {Martin-Piera, F. and Lobo, J. M.}
}
