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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Co-authors View all Claudia E. In fact, the first three species were only caught once Table 1. There is often a mosaic of different types of vegetation that have yet to suffer any significant loss of species. Only one Onthophagus corrosus was collected during T1 in the cloud forest fragment. However, the other species changed their hierarchical position, and for T2, there was gonzwlo increase in the number of rare species and those that were not very abundant.
For T2, evenness for the assemblage was lower than it was 10 yr before, and those species of moderate abundance or even the dominant species practically disappear or become rare or much less abundant one or two individuals, respectively.
This idea assumes that the protected areas are relatively stable, with no changes in their biota when they are protected from external influences.
This group has been used in previous studies and other tropical forests and has been found to be a good indicator of the effects of anthropogenic change. To halfftdr species abundance and evenness patterns between years, we used dominance-diversity graphs, also known as Whittaker or range-abundance graphs Feinsinger Their combined citations are counted only for the first article.
The second, lower halffter is m high and is comprised of cultivated species belonging to IngaCitrusMusaPerseaand Psidium. Coleoptera an animal group for analyzing, inventorying and monitoring biodiversity in tropical rainforest and modified landscapes. Howden and Howden attributed the changes in the beetle fauna to an increase in rainfall that favors the growth of the woody matorral vegetation and perhaps a dramatic increase hlffter the abundance of the aggressive exotic species of fire ant Solepnosis invicta Buren during the last sampling period in Welder.
Greater availability of excrement leads to an increase in the abundance of coprophagous beetles and allows the species with larger bodies to increase notably between T1 and T2. The original sampling was done inthe second inand the third in Howden and Howden That is, how stable are the assemblages in a landscape that has not been modified by humans?
Scarabaeinae G Halffter Biogeographia 15 1, Dung beetles of the Kibale forest, Uganda: The assemblages belong to cloud forests the original vegetation typesecondary forests, traditional shaded coffee plantations, commercial shaded coffee plantations, and a cattle pasture. Observed and estimated richness of copronecrophagous beetle species in five habitats on two different occasions a in a mountainous tropical landscape in Mexico.
The three previously mentioned species are evidence that the value for gamma diversity can vary according to the locations that are selected for sampling, even within the same set of habitats.
Universitat de Barcelona – Halffter, Gonzalo
Villa de Leyva, Colombia. The species accumulation curves reached a clear asymptote in 6 of the 10 possible cases and at the level of the entire landscape Fig.
Receive exclusive offers and updates from Oxford Academic. Copronecrophagous beetles, subfamily Scarabaeinae Insecta: Changes were found in species composition, order of abundance, and in the proportion halfvter a given species is present in the different functional groups. The changes that occurred between samplings affected the less abundant species in the cloud forest and in the pasture. Scarabaeinae and vertebrate burrows and caves.
The 18 species of beetles recorded were grouped on six guilds. For the second sampling period T2every 3 mo we set up a transect similar to that of T1, but with 16 pitfall traps baited in the same way.
Thus, an alternate or complementary explanation could support our results. From forest to pasture: Biology International Special issue 36, Variation in abundance for the 18 species recorded was notable among the different habitats and collection times. Scarabaeinae at Welder Wildlife Refuge. The same is true of the pasture where the data for T1 and T2 are even more similar.
Universitat de Barcelona – Honoris causa
Global Ecology and Biogeography — Journal of Macroecology. 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.
However, the results indicating the high degree of representation of the necrophages in the disturbed habitats supports the idea that they are a useful tool for evaluating the “health status” of sites.