Description of plant communities on the Red Sea coastal plain of Sudan

Werf, Wopke Van der; Sýkora, K.V.; Abate, Teshome; Mostofa, B.; Huis, A. van

doi:10.1016/j.jaridenv.2006.04.003

Cited by 16 publications

(7 citation statements)

References 17 publications

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“…We found that locust population density showed a positive correlation particularly with the abundance of P. maximum. Abundance of this grass species has been also associated with high population density of the S. gregaria locust (Woldewahid et al, 2007). The positive effect of the abundance of P. maximum on population density of locust species may be related to two main factors: 1) P. maximum represents a good source of food not only in the rainy season, but also in the dry season due to its drought tolerance capacity (Ho, Tsai, Huang, & Kao, 2016) due to its efficient water use (C-4 grass species) (Ghannoum, 2009) (Avilés & Ayala, 1994;Culmsee, 2002;Kokanova, 2014;Poot-Pech, RuizSánchez, Ballina-Gómez, Gamboa-Angulo, & Reyes-Ramírez, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Vegetation plays a major role in providing food and shelter for locusts. Studies on the desert locust Schistocerca gregaria have shown that high population density is correlated with the abundance of a specific group of plants, like the Boraginaceae Heliotropium arbainense and the Poaceae Pennisetum typhodium, Aristida pungens and Panicum turgidum (Ould & Sword, 2004;Woldewahid, Van der Werf, Van Huis & Stein, 2004;Woldewahid et al, 2007;Sword et al, 2010). The stage of the vegetation has been also implicated in affecting locust biology, low cover and dry vegetation leading to a high probability of contact between individuals, triggering gregarization and swarm formation (Cisse et al, 2013).…”

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confidence: 99%

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Fluctuación poblacional de Schistocerca piceifrons piceifrons (Orthoptera: Acrididae) en la Península de Yucatán y su relación con las condiciones climáticas:

Poot-Pech

Ruíz-Sánchez

Ballina-Gómez³

et al. 2017

RBT

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Abstract:The Central American Locust Schistocerca piceifrons piceifrons is one of the most damaging plant pest in Mexico and Central America. The present work was carried out to evaluate the seasonal population fluctuation of S. p. piceifrons and vegetation diversity and their association with weather factors and edaphic conditions in the gregarious zone of the Yucatán Península. The study was performed in seven sites during three seasons: North-wind (December 2013), rainy (June 2014) and dry (April 2014). The locust density was sampled in transect of 100 m 2 , as well as the vegetation in 16 m 2 : plant species richness (PSR) and relative species density (RSD), and analyzed by generalized linear models. Additionally, soil samples were obtained at 10 cm depth into a 4 × 6 m quadrat, land use in the sites was classified and temperature, precipitation and evaporation of each site were obtained from the database and they were analyzed with multiple factor analysis. The population density of S. p. piceifrons was higher in the sites Panaba, Tizimin, Tunkas and Cenotillo (F= 74.3, P < 0.0001). Characterization of vegetation showed that PSR and RSD were higher during the rainy season relative to those in the dry season (F= 50.4, P < 0.0001). RSD was identified as the most important group associated with locust density (0.86), followed by isotherm/isohyets (0.63), maximum precipitation and temperature (0.60), as well as the land use (0.65); no correlation between locust density and soil characteristics was found. Locust density was positively correlated with the abundance of the grass Panicum maximum (Sr 2 = 0.85, PC5= 0.87). This work shows that the population of S. p. piceifrons is high in the rainy season and influenced primarily by the abundance of the grass P. maximum and the precipitation. The results indicate that surveys for early detection and control of the locust on the Yucatán Península can focus on areas with the grass P. maximum to predict risk areas and target survey efforts. Rev. Biol. Trop. 66(1): 403-414. Epub 2018 March 01.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Fluctuación poblacional de Schistocerca piceifrons piceifrons (Orthoptera: Acrididae) en la Península de Yucatán y su relación con las condiciones climáticas:

Poot-Pech

Ruíz-Sánchez

Ballina-Gómez³

et al. 2017

RBT

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“…2). The A. tortilis shrubland has been described as one of the common plant communities on the coast (Woldewahid et al. 2007).…”

Section: Methodsmentioning

confidence: 99%

“…2). The A. tortilis shrubland has been described as one of the common plant communities on the coast (Woldewahid et al 2007). At the time being, the A. tortilis shrublands were infested by gregarious nymphs of desert locust, hoppers, and regarded as targets for insecticide treatment by the plant protection authorities; the Locust Control and Research Centre (LCRC), Ministry of Agriculture and Forestry of Sudan.…”

Section: Study Sitesmentioning

confidence: 99%

Short‐term assessment of dung beetle response to carbosulfan treatment against desert locust in Sudan

Eriksson

Isaksson²

2009

J Applied Entomology

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The beneficial role of dung beetles (Coleoptera: Scarabaeidae) is well known. Potential risks to these beetles from the widespread use of insecticides against the desert locust, a significant plant pest in Africa, the Near East and South West Asia, have not been studied previously. Short‐term responses of dung beetles to carbamate carbosulfan (Marshal®, ultra low‐volume formulation, 100 g active ingredient ha−1) were assessed during desert locust control operations at five sites within two major biotopes: Acacia tortilis shrubland and cultivated wetland; on the Red Sea Coast of Sudan. The study took place during January–February 2004. At each site, fresh dung from Zebu cows was placed in areas targeted for desert locust control. Dung pats were placed in plots in two areas and left for 24 h, before and after insecticide application. Beetles were extracted by floatation. There was a significant decrease in abundance between the pre‐ and post‐spray period in treated areas for the Scarabaeinae species Onthophagus margaritifer (a dark colour morph). In contrast, it was found that Aphodius lucidus and beetles at the subfamily level of Aphodiinae increased in numbers after insecticide treatment. Mortality and sublethal impacts as well as a repellent effect of the insecticide may explain the decrease in Onthophagus margaritifer, while the increase in Aphodiinae beetles could be an indirect response to lower numbers of Scarabaeinae beetles in competing for the same resource. These organisms and the applied methodology may be useful for environmental monitoring of desert locust control, thus further studies are suggested. The assessment also revealed a marked difference between the two biotopes with high abundance and species richness of dung beetles in A. tortilis shrubland, while these measures were low in the cultivated wetland. Five new species of dung beetles for Sudan were found in this study.

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“…On the Red Sea coastal plain of Sudan, Woldewahid et al. (2007) described four plant communities: the Suaeda monoica Forssk.…”

Section: Introductionmentioning

confidence: 99%

Relationships between food quality and fitness in the desert locust, Schistocerca gregaria, and its distribution over habitats on the Red Sea coastal plain of Sudan

Huis

Toleubayev

Werf

2008

Entomologia Exp Applicata

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The effect of millet, Pennisetum typhoideum Rich. (Poaceae), leaf nitrogen content on fitness parameters of the desert locust, Schistocerca gregaria Forsk. (Orthoptera: Acrididae), was studied under laboratory conditions. Locusts reared on high‐nitrogen leaves were larger, developed faster, had higher survival, reproduced more and earlier, and showed greater synchronization than those fed on low‐nitrogen leaves. Active and passive cannibalism contributed to mortality when locusts were reared on low‐nitrogen leaves, but not when reared on high‐nitrogen leaves. Elevated leaf nitrogen content of host plants increased net reproduction and intrinsic rate of increase, and lowered generation time. The findings show that nitrogen content of host plants affects the potential for population increase in the desert locust. Leaf samples of common plant species were collected in the Heliotropium arbainense (Fresen.) (Boraginaceae) and Panicum turgidum (Forssk.) (Poaceae) plant communities on the Red Sea coastal plain of Sudan during the winters of 1999 and 2000. The levels of leaf nitrogen in host plants were comparable to those in the laboratory studies and consistently higher in plant samples from the Heliotropium community than in samples from the Panicum community. Both in 1999 and 2000, locust densities were much higher in the Heliotropium than in the Panicum plant community. It should be assessed whether the desert locust would be attracted to sites where host plants have high leaf nitrogen content, as this would not only increase their fitness, but also the likelihood of gregarization and outbreaks.

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Description of plant communities on the Red Sea coastal plain of Sudan

Cited by 16 publications

References 17 publications

Fluctuación poblacional de Schistocerca piceifrons piceifrons (Orthoptera: Acrididae) en la Península de Yucatán y su relación con las condiciones climáticas:

Fluctuación poblacional de Schistocerca piceifrons piceifrons (Orthoptera: Acrididae) en la Península de Yucatán y su relación con las condiciones climáticas:

Short‐term assessment of dung beetle response to carbosulfan treatment against desert locust in Sudan

Relationships between food quality and fitness in the desert locust, Schistocerca gregaria, and its distribution over habitats on the Red Sea coastal plain of Sudan

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