Morphometric Differentiation in a Field Population of<i>Dichroplus maculipennis</i>(Orthoptera: Acrididae: Melanoplinae) under Outbreak and Non-Outbreak Situations

Mariottini, Yanina; Scattolini, María Celeste; Cigliano, Marı́a Marta; Lange, Carlos E.

doi:10.1665/034.024.0205

Cited by 3 publications

(2 citation statements)

References 28 publications

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“…As expected, Acrididae was the most diverse family and within it the subfamilies Melanoplinae and Gomphocerinae (species of which are generally associated with grassland systems; Pocco et al 2010) were the most diversi ed and abundant, representing 38% and 24% of the collected species, respectively. This agrees with various studies carried out timely and spatially restricted in different areas of the Pampas (Cigliano et al 2000; Torrusio et al 2002; De Wysiecki et al 2004;Mariottini et al 2015). Therefore, this trend emerged at both local and regional scales.…”

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confidence: 92%

“…Several of these 19 species are considered pests (Carbonell et al, 2024) and it is relevant to know the areas where they are particularly abundant. For example, Dichroplus maculipennis, a melanopline showing some clear expressions of density-dependent phase polyphenism (Mariottini et al, 2015), is predominantly abundant in the SE in association with the HG. From there, when outbreaks occur, it is capable of invading neighboring areas with mass-migrating adults.…”

Section: Discussionmentioning

confidence: 99%

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Grasshopper (Orthoptera: Acridoidea) diversity in the Pampas region of Argentina: status as revealed by long-term sampling

Mariottini,

Wysiecki,

Cepeda

et al. 2024

Preprint

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This study, spanning 37 years, assessed the diversity of grasshopper communities across much of the Pampas region. Ninety-five sampling sites were established in Buenos Aires and La Pampa provinces. Five zones were defined: Northeast (NE), Northwest (NW), Southeast (SE), Southwest (SW), and West (W). Each site was categorized according to the dominant vegetation. A total of fifty grasshopper species from three families were collected. Acrididae was the most diverse (41 species). Rarefaction analysis indicated that the SE was the zone with the lowest species richness (Q0). The NE, SW, and W showed higher diversity (Q1), while NE was less diverse according to Q2. The PCA revealed varying abundances of species across zones, with some species more abundant in specific areas (e.g., Dichroplus maculipennis and Borellia bruneri in SE). The highest species count (50) was in grassland with grass dominance. The CA showed significant associations between grasshopper species and different grasslands (e.g., Covasacris pallidinota, Dichroplus maculipennis, and Parorphula graminae in Halophilous grassland). Beta diversity highlighted species turnover as key component in the SW, W, and NE, while in the SE it was nestedness. In the NW, turnover and species loss components affected beta diversity. Communities were dominated by a few species, with three or four species representing over 50% of the community. Some abundant species declined or disappeared over time, while others appeared later. These results provide the first quantitative analysis of the grasshopper fauna across much of one of South America's most heavily modified ecosystems, the grasslands of the Argentine Pampas region.

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confidence: 92%

Section: Discussionmentioning

confidence: 99%

Grasshopper (Orthoptera: Acridoidea) diversity in the Pampas region of Argentina: status as revealed by long-term sampling

Mariottini,

Wysiecki,

Cepeda

et al. 2024

Preprint

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Are Anatomical Measurements Useful for Interspecific and Sexual Differentiation of Temnomastax (Orthoptera: Eumastacidae) Species?

Olivier

Aranda

2018

Zoological Science

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Species of Temnomastax have wide morphological similarities, and differentiation is usually based on male and female genitalia. In this study, we tested whether morphometric differences contribute to differentiation of species of Temnomastax, proposed an identification key for males, and morphometrically studied the sexual dimorphism of Temnomastax hamus and Temnomastax ricardoi. Analysis was performed using 204 specimens belonging to six species; fifteen morphometric variables were used. We used MANOVA and ANOVA to test the morphometric differences among species and Discriminant Analysis for sexual distinction. Temnomastax sp. nov. 1 had the highest values in ⅓ of all analyzed variables used for morphometric distinction of males, followed by Temnomastax latens, T. ricardoi and Temnomastax sp. nov. 2, and T. hamus and Temnomastax tigris. Two groups were formed by the MANOVA, with length of body, length of hind femur, and length of tegmen as the main variables that distinguished them. Overall, females of T. hamus and T. ricardoi presented higher averages for measurement values used in morphometric distinction between sexes than conspecific males and based on discriminant analysis we found significant differences between sexes. There are significant differences in morphometric variations and the ratio between body length and tegmen length provided reliable evidence for differentiation among species, which can be used as a valid tool that complements the identification of Temnomastax species.

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Global perspectives and transdisciplinary opportunities for locust and grasshopper pest management and research

Word Ries,

Adriaansen,

Aldobai

et al. 2024

JOR

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Locusts and other migratory grasshoppers are transboundary pests. Monitoring and control, therefore, involve a complex system made up of social, ecological, and technological factors. Researchers and those involved in active management are calling for more integration between these siloed but often interrelated sectors. In this paper, we bring together 38 coauthors from six continents and 34 unique organizations, representing much of the social-ecological-technological system (SETS) related to grasshopper and locust management and research around the globe, to introduce current topics of interest and review recent advancements. Together, the paper explores the relationships, strengths, and weaknesses of the organizations responsible for the management of major locust-affected regions. The authors cover topics spanning humanities, social science, and the history of locust biological research and offer insights and approaches for the future of collaborative sustainable locust management. These perspectives will help support sustainable locust management, which still faces immense challenges such as fluctuations in funding, focus, isolated agendas, trust, communication, transparency, pesticide use, and environmental and human health standards. Arizona State University launched the Global Locust Initiative (GLI) in 2018 as a response to some of these challenges. The GLI welcomes individuals with interests in locusts and grasshoppers, transboundary pests, integrated pest management, landscape-level processes, food security, and/or cross-sectoral initiatives.

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Morphometric Differentiation in a Field Population ofDichroplus maculipennis(Orthoptera: Acrididae: Melanoplinae) under Outbreak and Non-Outbreak Situations

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 3 publications

References 28 publications

Grasshopper (Orthoptera: Acridoidea) diversity in the Pampas region of Argentina: status as revealed by long-term sampling

Grasshopper (Orthoptera: Acridoidea) diversity in the Pampas region of Argentina: status as revealed by long-term sampling

Are Anatomical Measurements Useful for Interspecific and Sexual Differentiation of Temnomastax (Orthoptera: Eumastacidae) Species?

Global perspectives and transdisciplinary opportunities for locust and grasshopper pest management and research

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