GONZALO HALFFTER PDF
Gonzalo Halffter’s research works with citations and reads, including: In Memoriam Pedro Reyes Castillo. Gonzalo Halffter has expertise in. Gonzalo Halffter, Mexican entomologist. Red de Ecoetología; Instituto de Ecología A.C. – Carretera Antigua a Coatepec – XALAPA. Gonzalo Halffter . We have been addressing these questions with a strategy ( Halffter ) based on four .. , Arellano and Halffter , Arellano et al.
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The transformation of the cloud forest into agricultural fields was greatest from the end of the 19th century to gonzxlo midth century with the peak in coffee halgfter Challenger Scarabaeidae na Amazonia central. Scarabaeinae in a Mountainous Tropical Landscape of Mexico. Finally, in the hqlffter, the notable dominance of O. The nesting behavior of dung beetles Scarabaeinae. This habitat was the richest in species and had all but three of those found in the cloud forest: We have been addressing these questions with a strategy Halffter based on four points: Species codes capital letters are given in Table 1; n i is the number of individuals of each species recorded in each habitat.
As such, the goal of this research was to estimate the changes over time in beetle assemblages in an anthropogenic alteration gradient. This study shows that, although landscape richness remains relatively constant, richness at the local level alpha diversity changes notably even over short lapses of time.
This is a rare species that is characteristic of this forest. To what degree do Scarabaeinae composition and abundance vary over time in an intact tropical forest that has not been subjected to any anthropogenic modification? The capture gonnzalo a single individual suggests that this is a tourist species in this habitat, although it is relatively abundant at lower altitudes.
Gonzalo Halffter – Google Scholar Citations
Ecology Verified email at ku. All of the eight species of not collected habitats in this study are found at altitudes that are lower or higher than that of our landscape recall that we are working on a mountainsideand these species arrived at the altitude of our study sites marginally, taking advantage of the more heliophile conditions of the oak forests and the vegetation on lava.
Species diversity and habitat fragmentation: Halfftter earned his PhD in Sciences in from the National School of Biological Sciences of the National Polytechnic Institute of Mexico, an institution at which he has served as both chair and head of the Biology and Zoology Departments and where he has been an emeritus lecturer since Universidade Federal de Mato Grosso Verified email at ufmt. The predictions are catastrophic.
Get my own profile Cited by View all All Since Citations h-index 51 33 iindex Los cambios ocurridos entre los dos tiempos de muestreo afectaron a las especies poco abundantes en el bosque de niebla y en el pastizal. Dung beetles of the Kibale forest, Uganda: We feel that studies of how species composition and abundance change in space and time are of the utmost importance.
This leads us to ask whether this situation is typical for Scarabaeinae in tropical forests? Scarabaeidae are particularly sensitive to environmental change and are a good indicator group because of their biological and ecological attributes, as well as their natural history and the ease with which they can be sampled KleinHanski and CambefortHalffter and Favila As we have indicated, these variations could be a reflection of the flow of Scarabaeinae between the habitats of this landscape that are shaded by trees.
These variations have a big effect on the expression of the results for a certain time and exaggerate the differences between habitats, but these differences disappear when the study is done at a different time of the year. Eurysternus mexicanus was found in the same habitat type during T2.
Historical and ecological factors determining the geographical distribution of beetles Coleoptera: We expect as the habitat is less transformed, the assemblage is more stable over time, which could be observed through fewer changes in species richness and composition over time.
Entrevista Gonzalo Halffter
For both sampling periods, in all habitats, there were significant changes in the proportion of the guilds. In the cloud forest fragment, the samples were collected in and ; in the secondary forest, the samples were collected in and ; in the traditional shaded coffee plantation, samples were collected in and ; in the commercial shaded coffee plantation, samples were collected in and ; and in the cattle pasture, samples were collected in and Effects of deforestation on diversity, bio-mass and function of dung beetles on the eastern slopes of the Peruvian Andes.
The changes that occurred between samplings affected the less abundant species in the cloud forest and in the pasture. Hence, it is interesting to learn about the levels of stability of tropical mountain assemblages, where the biological diversity is generally high, but also where disturbance by humans is also constant in landscapes that were originally heterogeneous and fragmented.
Copronecrophagous beetles, subfamily Scarabaeinae Insecta: Scarabaeinaebeta diversityalpha diversityfragmented landscapescloud forestHalfgter clave: An analysis of three tropical landscapes. Of these, Ateuchus illaesum was only collected at T1 in the traditional shaded coffee plantations.
The pasture, comprised mainly of species belong to genera Paspalum and Panicumhad very few trees belonging to the genera Liquidambar and Quercuswhich were spared to provide shade for the cattle. Spatial distribution of three groups of Coleoptera along and al-titudinal transect in the Mexican Transition Zone and halrfter biogeographical implications.
Gonzalo Halffter – Wikispecies
At each site, every month during the first sampling period T1we set up a transect with 10 pitfall traps spaced 25 m apart and baited with alternating human excrement and decomposing squid. Biogeographical and ecological factors affecting the altitudinal variation of mountainous halffte of coprophagous beetles Coleoptera: For the commercial shaded coffee plantation, the difference between years in the length of the curves was more notable than for the other habitats.
Altitudinal variation of dung beetle Scarabaeidae: During three intensive sampling periods, and using the same methodology, the accumulated number of species halfftee diversity was 29 species, whereas the historical record gamma diversity, including samplings from several researchers was 50 species. The results of the changes in species and their abundances are the different proportions of the guilds at T1 and T2 Fig. Of these, few were recorded during our two sampling periods.
However, it is worth remembering the idea that Ricklefs expressed so clearly: Effect of forest fragmentation on dung beetle communities and functional consequences for plant regeneration.