Estimación de la riqueza de coleópteros epigeos de la Reserva Nacional Pingüino de Humboldt (Regiones de Atacama y Coquimbo, Chile)

Alfaro, Fermín M.; Pizarro-Araya, Jaime

doi:10.4067/s0717-65382017000200039

Cited by 2 publications

(2 citation statements)

References 30 publications

(41 reference statements)

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“…Even though several insect groups characteristic of the coastal scrub were recorded, the species accumulation curves did not reach a defined asymptote, which suggests that the species inventory of the studied communities is incomplete (Escalante, 2003;Alfaro and Pizarro-Araya, 2017).…”

Section: Discussionmentioning

confidence: 98%

Insects associated to ephemeral pools in Huentelauquén (29ºS Coquimbo Region, Chile)

2024

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In northern central Chile, ephemeral pools constitute shallow isolated water bodies with a favourable habitat for fauna adapted to seasonal changes. Based on the limited knowledge about the fauna—particularly insects—associated to these ecosystems, the objective of this study was to characterize the richness, composition, structure and similarity of the insect communities associated with ephemeral pools in Huentelauquén (29º S, Coquimbo Region, Chile). By using pitfall traps, 10,762 individuals were captured, represented by 7 orders, 27 families, and 51 species. Coleoptera and Hymenoptera were the best represented orders, with Neuroptera, Orthoptera and Plecoptera being poorly represented groups. The non-parametric estimators evaluated showed wealth values above those observed for all the studied pools, and their accumulation curves suggest the existence of an incomplete species inventory in the studied community. Additionally, the hierarchical and ordering analysis showed groupings of pools located in the northwest and southeast of Huentelauquén. Preliminarily we found a negative correlation between the area of the pools and the richness (species) and abundance of insects. Additional studies (on other arthropod groups and other seasons of the year) could provide a better understanding of the local processes of extinction and colonization of the species inhabiting these fragile coastal environments.

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Section: Discussionmentioning

confidence: 98%

Insects associated to ephemeral pools in Huentelauquén (29ºS Coquimbo Region, Chile)

2024

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“…To determine whether the species had an affinity for any given management system and flower color, the number of visits per species was used to conduct a simple correspondence analysis, using the CORRESP procedure of SAS University® v. 9.4 (SAS Institute Inc., 2020). The sampling efficiency of the species per management system and flower color was calculated from the non-parametric estimator Chao 2, since this does not fit a parametric mathematical model and considers the species observed in exactly one and two sampling units (Alfaro and Pizarro-Araya, 2017). To obtain the estimator, the program EstimateS® v. 9.1.0 (Colwell, 2013) was used.…”

Section: Data Analysesmentioning

confidence: 99%

Visitantes florales en el cultivo de Phaseolus coccineus (Fabaceae) en el Altiplano de Puebla, México: importancia del manejo agrícola y color de flor

et al. 2022

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Background and Aims: Phaseolus coccineus is an allogamous plant, with variation in flower color, and reproduction that depends on pollinators. The species is cultivated under two approaches: one in which agrochemicals are not used to control weeds and pests (traditional management) and another in which they are (technified management). No studies have evaluated the influence of agricultural management system and flower color on the floral visitors of this species; our objective was therefore to analyze how these factors affect the diversity and frequency of the floral visitors of P. coccineus. Methods: A study was conducted with two landraces of P. coccineus (white-flowered and red-flowered), cultivated under two different management systems. Simultaneous observations were conducted for a period of eight days during the peak of flowering, quantifying the number of floral visitors and visits. Species richness and the effective number of species were calculated, the latter was used as a measure of diversity. Chi-square tests were applied, a correspondence analysis performed, and rank abundance curves constructed. Key results: Forty-two morphospecies were recorded, grouped into six orders. Apis mellifera and Hylocharis leucotis were the predominant species. The numbers of visits recorded under traditional management were 1613 and 1105 in white and red flowers, respectively. Under the technified management, these values were 1427 and 815, respectively. There were consistent statistical differences between management systems, but not for flower color. In the white flowers, the traditional management was twice more diverse than the technified management. In the red flowers, this difference was 1.26 times. Conclusions: The diversity and frequency of floral visitors of P. coccineus are favored by the traditional agricultural management, demonstrating the desirability of promoting this type of cultivation. Under the conditions studied, flower color did not influence the species richness or demonstrate any defined tendencies on the frequency of visits.

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Estimación de la riqueza de coleópteros epigeos de la Reserva Nacional Pingüino de Humboldt (Regiones de Atacama y Coquimbo, Chile)

Cited by 2 publications

References 30 publications

Insects associated to ephemeral pools in Huentelauquén (29ºS Coquimbo Region, Chile)

Insects associated to ephemeral pools in Huentelauquén (29ºS Coquimbo Region, Chile)

Visitantes florales en el cultivo de Phaseolus coccineus (Fabaceae) en el Altiplano de Puebla, México: importancia del manejo agrícola y color de flor

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