scholarly journals Frenemy at the gate: Invasion by Pheidole megacephala facilitates a competitively subordinate plant ant in Kenya

Ecology ◽  
2020 ◽  
Author(s):  
Todd M. Palmer ◽  
Corinna Riginos ◽  
Patrick D. Milligan ◽  
Brandon R. Hays ◽  
Alejandro G. Pietrek ◽  
...  
Keyword(s):  
Pheidole Megacephala

Density dependence and the spread of invasive big-headed ants (Pheidole megacephala) in an East African savanna

Oecologia ◽  
2021 ◽  
Author(s):  
Alejandro G. Pietrek ◽  
Jacob R. Goheen ◽  
Corinna Riginos ◽  
Nelly J. Maiyo ◽  
Todd M. Palmer
Keyword(s):  
Density Dependence ◽  
East African ◽  
African Savanna ◽  
Pheidole Megacephala

Response of an open-forest ant community to invasion by the introduced ant, Pheidole megacephala

2000 ◽  
Vol 25 (3) ◽  
pp. 253-259 ◽  
Author(s):  
C. Vanderwoude ◽  
L. A. Lobry De Bruyn ◽  
A. P. N. House
Keyword(s):  
Pheidole Megacephala ◽  
Ant Community ◽  
Open Forest

scholarly journals Comunidades de formigas (Hymenoptera, Formicidae) em fragmentos de Mata Atlântica situados em áreas urbanizadas

2007 ◽  
Vol 97 (3) ◽  
pp. 246-252 ◽  
Author(s):  
Maria Santina de C. Morini ◽  
Catarina de B. Munhae ◽  
Roberto Leung ◽  
David F. Candiani ◽  
Júlio C. Voltolini
Keyword(s):  
Linepithema Humile ◽  
Sao Paulo ◽  
São Paulo ◽  
Pheidole Megacephala ◽  
Mata Atlântica ◽  
Wasmannia Auropunctata ◽  
Tapinoma Melanocephalum ◽  
Mata Atlantica ◽  
E 32

As comunidades de formigas que vivem em fragmentos de Mata Atlântica rodeados por um ecossistema urbano bem desenvolvido, foram investigadas. Avaliou-se a riqueza, a freqüência de ocorrência das espécies bem como a similaridade entre três áreas da cidade de São Paulo: Parque da Previdência (PP), Reserva Florestal "Armando Salles de Oliveira" (CUASO) e Horto Oswaldo Cruz (HOC). Foram colocadas armadilhas do tipo "pitfall" em locais onde não ocorre visitação pública, durante uma semana, nos meses de março, junho, setembro e dezembro de 2001. Em todos os fragmentos foram coletadas 79 espécies de formigas, pertencentes a nove subfamílias e 32 gêneros. A subfamília Myrmicinae e os gêneros Pheidole e Hypoponera foram os mais ricos. No PP foram registradas 62 espécies, na CUASO 46 e no HOC 43, sendo que PP e CUASO são mais similares entre si. Tal similaridade possivelmente esteja relacionada ao tamanho de ambas as áreas e, também, a uma semelhança nos sítios de nidificação e de alimentação. No geral, a fauna de formigas é generalista, com a presença de alguns gêneros especialistas, como Discothyrea, Acanthognathus, Gnamptogenys, Oxyepoecus e Pyramica; ou de gêneros cujos hábitos alimentares ainda são desconhecidos (Heteroponera e Myrmelachista). A presença de espécies caracteristicamente de áreas domiciliares também foi constatada: Pheidole megacephala Fabricius, 1793, Linepithema humile Mayr, 1868, Wasmannia auropunctata Roger, 1863, Paratrechina fulva Mayr, 1862, P. longicornis Latreille, 1802 e Tapinoma melanocephalum Fabricius, 1793.

Effects of the coastal brown ant Pheidole megacephala (Fabricius), on the ant fauna of the Perth metropolitan region, Western Australia

2000 ◽  
Vol 6 (1) ◽  
pp. 81 ◽  
Author(s):  
J. E. May ◽  
B. E. Heterick
Keyword(s):  
Western Australia ◽  
Abundant Species ◽  
Pitfall Trap ◽  
The Other ◽  
Metropolitan Region ◽  
Pheidole Megacephala ◽  
Apparent Displacement ◽  
Significant Difference ◽  
Almost All

This paper reports on the apparent displacement of native and exotic ants from gardens in the Perth Metropolitan region by the coastal brown ant (Pheidole megacephala (Fabricius)). Twelve gardens were sampled, four with P. megacephala present, and eight (the controls) where the ant was judged to be absent. Eight out of the 26 ant species recorded (including the coastal brown ant) were introduced. Ninety-two per cent of pitfall trap contents comprised the four most abundant species: P. megacephala, lridomyrmex chasei (Forel), Tetramorium simillimum (F. Smith) and Paratrechina ?obscura (Mayr). Three of the four P. megacephala-dominated gardens were depauperate of almost all other ant species. The fourth P. megacephala-infested garden had a relatively small number of coastal brown ants (104), and the highest number of ant species was found in that garden. The removal of this outlier garden left an average range of one to three species for the other three P. megacephala-infested gardens. Control gardens had between five and 12 ant species. Total ant abundance ranged from an average of 1 027 per P. megacephala-infested garden (increasing to 1 171 if the outlier garden is removed) to 146 at control gardens. There was a significant difference both in ant richness and ant abundance between the controls and P. megacephala-infested gardens (P < 0.05). This remained the case when figures for coastal brown ants were excluded from calculations.

Flowering, Pollination and Pod Formation in Bambara Groundnut (Voandzeia Subterranea) in Ghana

1968 ◽  
Vol 4 (1) ◽  
pp. 41-48 ◽  
Author(s):  
E. V. Doku
Keyword(s):  
Bambara Groundnut ◽  
Pheidole Megacephala ◽  
Monomorium Pharaonis ◽  
Pulse Crop ◽  
Cross Pollination

SummaryAlthough bambara groundnut (Voandzeia subterranea) is an important pulse crop in Africa and particularly in Ghana, information on the crop is not only very limited but conflicting, especially as regards flowering and mode of pollination. Both self- and cross-pollination can take place in varying degrees, depending on variety or strain, and this is brought about by two species of ants, Pheidole megacephala and Monomorium pharaonis, without which pollination might be severely limited or prevented altogether. The extent of cross pollination may be greater in varieties or strains with a more open habit, i.e.. varieties resembling the wild uncultivated ancestors, whereas the bunch cultivated types are more likely to be self-pollinated. It is suggested that varieties or strains may show differences in their ability to cross with one another.

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