Diversity response of necrophagous dipteran communities and their functional groups to an anthropization gradient.

The anthropization process exerts a profound effect on ecosystems, causing alterations in biodiversity, habitat structure, and species composition, ultimately disrupting the delicate balance of natural environments. The aim of the present study was to explore the ecological dynamics of necrophagous Sarcophagidae and Calliphoridae flies along an anthropization gradient. This research investigated alpha and beta diversity patterns to unravel the impact of human-induced environmental changes on these insect communities and also assesses the dynamics of functional groups in relation to their impact on medical and forensic fields.

Dung removal increases under higher dung beetle functional diversity regardless of grazing intensification.

Dung removal by macrofauna such as dung beetles is an important process for nutrient cycling in pasturelands. Intensification of farming practices generally reduces species and functional diversity of terrestrial invertebrates, which may negatively affect ecosystem services. Here, we investigate the effects of cattle-grazing intensification on dung removal by dung beetles in field experiments replicated in 38 pastures around the world.

New records and geographic distribution of Cerambycidae (Insecta: Coleoptera) in the Humid Chaco District, Argentina.

Fourteen species are recorded for the first time for Argentina: Amethysphaerion guarani Martins & Napp, 1992 (Cerambycinae, Elaphidiini); Apyrauna annulicornis Martins, 2005 (Cerambycinae, Elaphidiini); Coleoxestia pubicornis (Gounelle, 1909) (Cerambycinae, Cerambycini); Eburodacrys truncata Fuchs, 1956 (Cerambycinae, Eburiini); Ectenessidia nigriventris (Belon, 1902) (Cerambycinae, Ectenessini); Gorybia apatheia Martins, 1976 (Cerambycinae, Piezocerini); Hemilissa sulcicollis Bates, 1870 (Cerambycinae, Piezocerini); Pronoplon rubriceps (Gounelle, 1909) (Cerambycinae, Hexoplonini); Callisema rufipes Martins & Galileo 1990 (Lamiinae, Calliini); Recchia goiana Martins & Galileo, 1985 (Lamiinae, Aerenicini); Rosalba approximata (Melzer, 1934) (Lamiinae, Apomecynini); Rosalba digna (Melzer, 1934) (Lamiinae, Apomecynini); Hypsioma steinbachi Dillon & Dillon, 1945 (Lamiinae, Onciderini); Trypanidius maculatus Monné & Delfino, 1980 (Lamiinae, Acanthocinini).

First record of Cnemidochroma phyllopus (Coleoptera: Cerambycidae) in the province of Corrientes, Argentina and potential distribution in the southern part of South America.

Cnemidochroma Schmidt, 1924, a small genus of the tribe Callichromatini endemic in South America, comprises six species of which the only one recorded in Paraguay, Uruguay, Argentina and Brazil is C. phyllopus (Gurin-Mneville, 1844). The aim of this study was to estimate potential suitable areas for C.

Terrestrial Ant Assemblages (Hymenoptera: Formicidae) in Protected Forests and Grasslands in Three Ecoregions of Corrientes Province, Argentina.

A comparative study on forests and grasslands in three ecoregions (Humid Chaco, Espinal, and Paranaense) was conducted in two protected areas in northeastern Argentina: Iberá National Park and Mburucuyá National Park. The effects of habitat heterogeneity (vegetation cover) on terrestrial ant (Formicidae) assemblages were analyzed and compared. The habitat heterogeneity hypothesis-which predicts that when environmental structural complexity increases, the species richness will also increase-was tested.

Seasonal Fluctuations in Sarcophagidae (Diptera: Calyptratae) Assemblages in the Humid Chaco Ecoregion, Argentina.

The seasonal fluctuations of flesh fly (Diptera: Sarcophagidae) assemblages were investigated from March 2015 to February 2016 in five habitat types in the Humid Chaco ecoregion, Chaco Province, Argentina. Three of the habitats were anthropized: an urban area, a cattle farm, and an alfalfa crop; and two were natural: a savanna and a forest. Flesh flies were collected monthly at 25 sampling points, five per habitat.

The Effect of Anthropization on Sarcophagidae (Diptera: Calyptratae) Community Structure: An Assessment on Different Types of Habitats in the Humid Chaco Ecoregion of Argentina.

Sarcophagidae (Diptera) are of great interest from a veterinary, medical, and forensic viewpoint, and are potential bioindicators for environmental impact assessments. In this study, we evaluated changes in abundance, species richness, and diversity of flesh flies in different habitat types in the Humid Chaco ecoregion of South America: 1) anthropized habitats: urban, cattle farm, and alfalfa crop, and 2) natural habitats: savanna and forest. We hypothesized that sarcophagid fly community parameters are affected by the anthropization and that spatial turnover will contribute more to the overall beta diversity than nestedness between habitats.

Calliphoridae (Diptera) in Human-Transformed and Wild Habitats: Diversity and Seasonal Fluctuations in the Humid Chaco Ecoregion of South America.

A temporal study of the Calliphoridae fauna was conducted in five different types of habitats in the Humid Chaco ecoregion: an urban settlement, a cattle farm, an alfalfa crop, a savanna, and a forest. Research was carried out to analyze 1) how the species composition of blow fly communities changes across different types of human-modified and wild environments, 2) their seasonal fluctuations, and 3) the influence of climatic factors (relative humidity, temperature, and precipitations) on the temporal dynamics of these communities. In each habitat, five sites were selected for the collection of blow flies using bait traps, and flies were collected for 1 yr.

Description of the larva and pupa of (Kirby, 1819) (Coleoptera: Scarabaeidae: Cetoniinae: Gymnetini).

The third instar and pupa of Neocorvicoana reticulata (Kirby, 1819) (Coleoptera: Scarabaeidae: Cetoniinae: Gymnetini) from Argentina, are described and illustrated. This is the first description of immatures in this genus. A key to the known third-stage larvae of New World Gymnetini species is provided, which now includes 19 species in 10 genera.

Assessment of the Abundance and Diversity of Calliphoridae and Sarcophagidae (Diptera) in Sites With Different Degrees of Human Impact in the Iberá Wetlands (Argentina).

The aim of the present study was to explore the diversity and describe the spatial distribution of Calliphoridae and Sarcophagidae along an urbanization gradient in the Iberá Wetlands. The flies were collected at 18 sampling points, three per site. In total, 3,318 flies were collected (3,077 blow flies and 241 flesh flies), distributed in 13 genera and 33 species.

Spatial and temporal variation of dung beetle assemblages in a fragmented landscape at eastern humid Chaco.

The aims of this study were to characterize the fauna of dung beetles and analyze their spatial and temporal diversity in a cattle ranch in the province of Chaco. Seven surveys were conducted in three environmental units: a forest fragment, a cattle pasture, and an open grassland. The efficiency of the sampling was assessed with non-parametric richness estimators, and attributes of the assemblage were evaluated.

[Composition of the Araneae (Arachnida) fauna of the provincial Iberá Reserve, Corrientes, Argentina].

A survey of the spider community composition and diversity was carried out in grasslands and woods in three localities: Colonia Pellegrini, Paraje Galarza and Estancia Rinc6n (Iberá province Reserve). Pit fall traps, leaf litter sifting, foliage beating, hand collecting and sweep nets were used. Shannon's diversity index, evenness, Berger-Parker's dominance index, beta and gamma diversity were calculated, and a checklist of spider fauna was compiled.

Do spider diversity and assemblages change in different contiguous habitats? A case study in the protected habitats of the humid chaco ecoregion, northeast Argentina.

Spiders are a megadiverse group that can be useful indicators of the overall species richness and health of biotic communities. The spider diversity in subtropical forests of the Neotropical region are not yet well known, especially in Argentinean subtropical forests where systematic fieldwork has not been done until recently. The Great Chaco is very important as the unique dry subtropical forest of the earth, but it is suffering increasing degradation by the advance of agriculture.

Life cycle and reproductive patterns of Triatoma rubrovaria (Blanchard, 1843) (Hemiptera: Reduviidae) under constant and fluctuating conditions of temperature and humidity.

The aim of this study was to evaluate the temperature and relative humidity influence in the life cycle, mortality and fecundity patterns of Triatoma rubrovaria. Four cohorts with 60 recently laid eggs each were conformed. The cohorts were divided into two groups.

[Epidemiology of Chagas disease in San Roque, Corrientes. Triatomine infestation and human seroprevalence].

This investigation was aimed to evaluate triatomine colonization in domestic and extradomestic ecotopes located around a palm community, to determine triatomines infection index and to obtain human seroprevalence rates. Samplings were performed in spring 1998 and summer 1999 in Colonia Laurel, Department San Roque, Corrientes, Argentina. Timed-collection of triatomines (man/hour method) was performed.

[Population statistics of Triatoma rubrovaria in laboratory].

Objective: To obtain T. rubrovaria population parameters in order to describe its demographic characteristics.

Methods: The study was carried out in the laboratory of Arthropods, Corrientes, Argentina, from October 2000 to February 2003.

Competition between vectors of Chagas disease, Triatoma infestans and T. sordida: effects on fecundity and mortality.

Interspecific competition between two species of triatomine bugs (Hemiptera: Reduviidae), vectors of Chagas disease, was assessed for 16 months through comparative fecundity and mortality of experimental populations in chicken nests, maintained indoors with ambient conditions. Triatoma sordida (Stål), the secondary vector in north-eastern Argentina, was compared with Triatoma infestans (Klug) the more widespread domestic vector in the southern cone of South America. Both species populations originated from females collected in 1995 from the community of Empedrado, Corrientes, Argentina.

[Chagas' disease epidemiology in the province of General Paz, Argentina].

Objective: The aim of this study was to evaluate triatomine colonization in domestic and peridomestic ecotopes and to assess the seroprevalence of Chagas' disease in rural areas.

Methods: The study was carried out in the province of General Paz, Corrientes, Argentina. Human dwellings and peridomestic ecotopes were randomly selected.

[Detection of triatomines (Hemiptera: Reduviidae) in domiciliary and extra-domiciliary ecotopes. Corrientes, Argentina. ].

In order to identify intra- and extra-domiciliary triatomines, a study in different counties of Corrientes Province, Argentina, was conducted from 1985 to 1995. Triatoma infestans (Klug, 1834), Triatoma sordida (Stål, 1859), Panstrongylus geniculatus (Latreille, 1811), and Panstrongylus megistus (Burmeister, 1835) were detected in domestic ecotopes. T.

Interactions between Triatoma infestans and Triatoma sordida (Hemiptera: Reduviidae) in artificial ecotopes: population growth and age structure.

Interaction characteristics between Triatoma infestans Klug, 1834 and Triatoma sordida Stal, 1859 populations were studied in artificial ecotopes for 16 mo. The experimental design involved simultaneous treatments with T. infestans and T.

[Household infestation by triatomines and human seroprevalence in Empedrado Department, Corrientes, Argentina].

Domestic and peridomestic triatomine colonization, T. infestans infection rate and human seropositives to Trypanosoma cruzi in rural areas of Empedrado Department, Corrientes, Argentina, were carried out. Methods used in order to search the triatomines, to determine them systematically, to obtain their infection rates and the human seropositives, were the same applied in a previous report.

[Domestic infestation by Triatoma infestans and prevalence of Trypanosoma cruzi seropositives in a rural area of the Argentinian northeast].

An epidemiological study was carried out from April 1991 to December 1993 to obtain a general view of T. cruzi domestic transmission in rural areas of San Miguei Department, Corrientes. From 100 analyzed households, 50.

[Population statistics of Triatoma sordida Stäl 1859 (Hemiptera:Reduviidae) in experimental conditions].

Four cohorts of 100 Triatoma sordida eggs were reared under standard laboratory conditions (28 degrees C, 63% R.H.) and fed weekly on hens during 40 minutes.

[Population interactions between Triatoma infestans and Triatoma sordida].

Populations of T. infestans and T. sordida were studied between September 1988 and April 1989 with a view to discovering if any kind of interaction took place between them while they lives together in the same experimental unit and exploited the same food resource (chicken).

[Presence of Triatoma sordida Stäl, 1859 in urban ecotopes, of the city of Corrientes, Argentina].

With the intention of verifying the presence of T. sordida Stál 1859 in urban ecotopes in Corrientes city, Argentina, both, human dwellings and an extradomiciliary habitat were taken as a basis. A complete T.