Effects of weak climatic variations on assemblages and life cycles of Orthoptera in North Algeria

Guendouz-Benrima, Atika; Mitiche, Bahia Doumandji; Petit, Daniel

doi:10.1016/j.jaridenv.2010.12.006

Cited by 12 publications

(7 citation statements)

References 26 publications

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“…Total numbers of grasshopper individuals were also highest in drought plots and overall negatively affected by soil humidity. In general, climatic parameters are key factors for Orthoptera (Guo et al, 2009;Guendouz-Benrima et al, 2011). For example, milder winter temperatures and a sooner start of the dry period presumably lead to a faster transition between larval stages, earlier emergence of adults (Köhler et al, 1999;Guendouz-Benrima et al, 2011) and migration from moist to dry sites (Oschmann, 1973).…”

Section: Short-term Effects Of Simulated Small-scale Climate Change Omentioning

confidence: 99%

“…In general, climatic parameters are key factors for Orthoptera (Guo et al, 2009;Guendouz-Benrima et al, 2011). For example, milder winter temperatures and a sooner start of the dry period presumably lead to a faster transition between larval stages, earlier emergence of adults (Köhler et al, 1999;Guendouz-Benrima et al, 2011) and migration from moist to dry sites (Oschmann, 1973). Although no statistical significance could be established, spiders also tend to be more abundant in drought plots; this is most evident for the lycosid Pardosa palustris, which appeared in very high numbers in this treatment.…”

Section: Short-term Effects Of Simulated Small-scale Climate Change Omentioning

confidence: 99%

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Simulating small‐scale climate change effects–lessons from a short‐term field manipulation experiment on grassland arthropods

2012

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Climate change is expected to cause major consequences on biodiversity. Understanding species-specific reactions, such as species shifts, species declines, and changes in population dynamics is a key issue to quantify large-scale impacts of climate change on biotic communities. As it is often impossible or at least impracticable to conduct large-scale experiments on biotic responses to climate change, studies at a smaller scale may be a useful alternative. In our study, we therefore tested responses of grassland arthropods (carabid beetles, spiders, grasshoppers) to simulated climate change in terms of species activity densities and diversity. We conducted a controlled field experiment by changing water and microclimatic conditions at a small scale (16 m(2) ). Roof constructions were used to increase drought-like conditions, whereas water supply was enhanced by irrigation. In all, 2 038 carabid beetles (36 species), 4 893 spiders (65 species), and 303 Orthoptera (4 species) were caught using pitfall traps from May to August, 2010. During our experiment, we created an artificial small-scale climate change; and statistics revealed that these changes had short-term effects on the total number of individuals and Simpson diversity of the studied arthropod groups. Moreover, our results showed that certain species might react very quickly to climate change in terms of activity densities, which in turn might influence diversity due to shifts in abundance patterns. Finally, we devised methodological improvements that may further enhance the validity of future studies.

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Section: Short-term Effects Of Simulated Small-scale Climate Change Omentioning

confidence: 99%

Section: Short-term Effects Of Simulated Small-scale Climate Change Omentioning

confidence: 99%

Simulating small‐scale climate change effects–lessons from a short‐term field manipulation experiment on grassland arthropods

2012

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“…Th is indicates that these two species have evolved to optimally exploit the duration of the spring season, with hatching occurring when spring rainfalls set in and ovipositing taking place before the ground has completely dried out. Hopper development also seems timed to allow reproduction to take place in early summer before preferred grass plants dessicate or lose nutritional value (Joern & Gaines 1990), which has been suggested to be a restrictive ecological feature in other mediterranean Orthoptera (Lehmann & Lehmann 2008, A. Guendouz-Benrima et al 2011.…”

Section: Discussionmentioning

confidence: 99%

Development, reproductive capacity and diet of the Mediterranean grasshopperArcyptera brevipennis vichetiHarz 1975 (Orthoptera: Caelifera: Acrididae: Gomphocerinae)

Schultner

Blanchet

Pagès

et al. 2012

Annales de la Société entomologique de France (N.S.)

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Abstract. Arcyptera brevipennis vichetiHarz 1975 (Orthoptera: Acrididae) is a rare grasshopper native to Mediterranean grassland habitats in the Languedoc-Roussillon region of southern France. Changes in land-use have modifi ed these unique habitats, thus threatening the survival of A. b. vicheti populations. To improve the conservation of this species this study aimed to describe important aspects of its biology and ecology. Development of nymphs passed through fi ve instars after hatching and was closely associated with the Mediterranean spring season. A prominent sexual size dimorphism is highlighted, but the larger females developed in the same number of instars as males. Hind femur length and number of antenna segments were useful characters when distinguishing between nymphal instars. All individuals were brachypterous, indicating that A. b. vicheti is unable to fl y. Adult females laid 15 eggs on average and deposited no more than two egg pods in their lifetime. Grass debris made up 93% of faecal content of both sexes. Our results provide valuable information for the conservation of this highly endangered grasshopper species.Résumé. Développement, capacité de reproduction et régime alimentaire du criquet méditerranéen. Arcyptera brevipennis vicheti Harz 1975 (Orthoptera : Caelifera : Acrididae : Gomphocerinae). Arcyptera brevipennis vicheti Harz 1975 (Orthoptera : Acrididae) est un criquet indigène rare des pelouses du Languedonc-Roussillon dans le sud de la France. Les changements dans l'aménagement du territoire ont modifi é ces habitats uniques, menaçant ainsi la survie des populations d' A. b. vicheti. Afi n d'améliorer la conservation de cette espèce, cette étude s'est donnée pour mission de décrire les grands aspects de sa biologie et de son écologie. Le développement des larves passe par 5 stades après l'éclosion et est étroitement associée avec le printemps méditerranéen. Un fort dimorphisme sexuel est mis en évidence mais les femelles de grande taille se développent avec le même nombre de stades larvaires que les mâles. La longueur du fémur postérieur et le nombre de segments des antennes sont des caractères utiles pour distinguer les stades larvaires. Tous les individus sont brachyptères, ce qui indique qu'A. b. vicheti est incapable de vol. Les femelles adultes pondent une moyenne de 15 oeufs et ne déposent pas plus de 2 oothèques durant leur vie. Les débris herbeux constituent jusqu'à 93% des contenus fécaux des deux sexes. Nos résultats fournissent des informations précieuses pour la conservation de cette espèce fortement menacée.

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“…Given the dependence of grasshopper assemblages on the structure and type of vegetation in Algeria (Guendouz-Benrima et al, 2011;Moussi et al, 2011;Sobhi et al, 2013) and Europe (Bonnet et al, 1997), it was fi rst necessary to describe the vegetation and soil. In particular, we focused on the monthly changes in salt concentrations at different depths in the soil in relation to variations in climate.…”

Section: Site Descriptionmentioning

confidence: 99%

“…Regarding the cycle (Benfekih & Petit, 2010;Guendouz-Benrima et al, 2011;Moussi et al, 2011), comparison between species will be addressed in another paper. Finally, the analyses revealed the species that were most threatened by the changes occurring in these areas.…”

Section: Introductionmentioning

confidence: 99%

Diversity of grasshoppers (Caelifera) recorded on the banks of a Ramsar listed temporary salt lake in Algeria

Mahloul¹,

Harrat²,

Petit³

2016

Eur. J. Entomol.

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Effects of weak climatic variations on assemblages and life cycles of Orthoptera in North Algeria

Cited by 12 publications

References 26 publications

Simulating small‐scale climate change effects–lessons from a short‐term field manipulation experiment on grassland arthropods

Simulating small‐scale climate change effects–lessons from a short‐term field manipulation experiment on grassland arthropods

Development, reproductive capacity and diet of the Mediterranean grasshopperArcyptera brevipennis vichetiHarz 1975 (Orthoptera: Caelifera: Acrididae: Gomphocerinae)

Diversity of grasshoppers (Caelifera) recorded on the banks of a Ramsar listed temporary salt lake in Algeria

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