Temporal structure of an ant community in semi‐arid Australia

Briese, D. T.; Macauley, B.J.

doi:10.1111/j.1442-9993.1980.tb01236.x

Cited by 102 publications

(88 citation statements)

References 18 publications

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“…Neotropical savanna) tend to be strictly nocturnal (Fagundes et al 1996;Strauss et al 2009;Byk & Del-Claro 2010). Moreover, due to the plants reduce greatly the nectar secretion when this resource is removed in low frequency (Koptur 1983;Pyke 1991;Heil et al 2000), the ants' visitation on EFN of A. verrucosa may also have night foraging in arid and semi-arid regions (Briese & Macauley 1980;Oliveira et al 1995). However, abiotic factors could also influence the nectar secretion of A. verrucosa.…”

Section: Discussionmentioning

confidence: 99%

Temporal variation in extrafloral nectar secretion in different ontogenic stages of the fruits ofAlibertia verrucosaS. Moore (Rubiaceae) in a Neotropical savanna

Falcão

Dáttilo

Izzo

2013

Journal of Plant Interactions

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In this study, we evaluate the temporal variation in extrafloral nectaries (EFNs) secretion in different ontogenic stages of Alibertia verrucosa (Rubiaceae) fruits in a Neotropical savanna. We observe greater nectar secretion rate in fruits of intermediate size compared with young or ripe fruit, indicating that they are possibly more protected by ants. In addition, the nectar secretion was higher at night, a pattern that could be associated with an increase of herbivore pressure and water stress during the daylight hours. In fact, due to the high temperature and low humidity during the day in savannas, most herbivores display strong nocturnal activity, and plants can avoid nectar secretion in this period. Our results indicate that A. verrucosa can change the ants' attraction according to EFN secretion during the ontogenic stages of the fruits, probably secreting more nectar when the biotic defense are more necessary for the protection of the fruits and the plant as a whole.

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Section: Discussionmentioning

confidence: 99%

Temporal variation in extrafloral nectar secretion in different ontogenic stages of the fruits ofAlibertia verrucosaS. Moore (Rubiaceae) in a Neotropical savanna

Falcão

Dáttilo

Izzo

2013

Journal of Plant Interactions

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“…Part of this variability was due to purely seasonal e ects on activity, such as that caused by stimulatory±inhibi-tory cues (e.g. low nocturnal temperatures, rainfall events; Briese & Macauley 1980). Because of this variability, I report three sets of values with Fig.…”

Section: P a T T E R N S O F O C C U R R E N C E W I T H R E S P E C mentioning

confidence: 99%

“…Several authors (Harkness & Wehner 1977;Briese & Macauley 1980;Andersen 1986; Ho mann 1998) have indicated that thermophily may be an adaptation to avoid competition by dominant ants active at cooler temperatures. Thus, while the use of cool, shaded habitats or times of year by ants may be one strategy for avoiding exclusion by dominants (Andersen 1995), thermophily may provide another.…”

Section: G E N E R a L I T Y O F T E M P E R A T U R E -D O M I N A Nmentioning

confidence: 99%

“…Thermophilic ants (with activity peaks at temperatures greater than I 37 C) have been identi®ed in unrelated taxa inhabiting open-habitat ant communities in several regions of the world, including tropical (Ho mann 1998) and temperate (Briese & Macauley 1980) Australia, Mediterranean mountains (Fernandez-Escudero & Tinaut 1998) and coastal areas , pre-Saharan African steppe (Heatwole & Muir 1989) and the Namib Desert (Marsh 1985). Several authors (Harkness & Wehner 1977;Briese & Macauley 1980;Andersen 1986; Ho mann 1998) have indicated that thermophily may be an adaptation to avoid competition by dominant ants active at cooler temperatures.…”

Section: G E N E R a L I T Y O F T E M P E R A T U R E -D O M I N A Nmentioning

confidence: 99%

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The trade‐off between thermal tolerance and behavioural dominance in a subtropical South American ant community

Bestelmeyer

2000

Journal of Animal Ecology

103

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Summary1. The distribution, ecology, and behaviour of ants (Hymenoptera: Formicidae) is profoundly in¯uenced by environmental stress and competition. As in plants, trade-o s in adaptations to these factors are the basis for functional classi®cations of ant taxa and communities at a global scale. 2. Theory predicts a trade-o between stress tolerance and competitive dominance in both plants and ants. In ants, low temperature is thought to be stressful, so I hypothesized that there would be a positive relationship between temperature and behavioural dominance. I evaluated this relationship in a South American, Chaco ant community. 3 The activity and behaviour of ground-foraging, omnivorous ants were examined at baits in open and closed, forested habitats during di erent seasons and times of day to characterize the responses of ant taxa to variation in microclimate and competitors. 4. Behaviourally dominant ants were most active at moderately high temperatures, whereas subordinate species were active at extreme temperatures, when they had virtually exclusive access to resources. 5. The patterns presented here and those observed in other studies suggest that there is a general trade-o between behavioural dominance and thermal tolerance in ants. This trade-o creates a linear relationship between temperature use and dominance for ants up to I 35 C, but extremely high temperatures may also be stressful such that the full relationship is actually unimodal.

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“…Trees represent physical barriers that obstruct the movement of seeds by insects increasing the energy expenditure (Crist & Wiens 1994, Notman & Villegas 2005. However, other factors such as seed production phenology (Schafer et al 2006) and high temperatures of the soil during the day in open areas (Briese & Macauley 1980, Sudd & Franks 1987 also are involved. In our study, the subalpine grassland lacked trees, suggesting that during the day the temperatures may have been high because there isn´t arboreal cover and thus shifting the activity of insects to the night when, additionally, the risk of being preyed upon by insectivores is lower (Tigar & Osborne 1999).…”

Section: Discussionmentioning

confidence: 99%

Pine seed removal in fragments of three temperate plant communities

Flores‐Peredo¹,

Sánchez-Velásquez²,

Bolívar‐Cimé³

2016

Bot. Sci.

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Background: Foraging strategies may vary among guilds of granivores and impact the tree recruitment and biodiversity of plant communities. Hypothesis: The hypotheses were: during the night in areas with tree cover rodents will be the main seed removers, insects in open areas at night, and birds in all types of plant communities during the daytime. Mathematical model: The seed removal by birds, rodents and insects was studied in a Mexican temperate forest. In order to detect differences in seed removal of Pinus patula, P. pseudostrobus, P. teocote and P. montezumae, a GLMM model with three way interaction (type of plant community, exclusion treatment and period) was carried out for each pine seed species where random variables were the variation among sites and months. Study site and years of study: This study was carried out in a Mexican temperate forest during February 2006 and January 2007. Methods: Through exclusion treatments we evaluated the seed removal of four pine species in three plant communities with two replicates (1 ha approximately) and two periods. Results: The three-way interaction was significant for all pine species (P < 0.001) (GLMM processes). The variance was greater among sites than between months. The main seed removers for all pine seed species, were: At night insects for subalpine grassland; during the daytime birds for all plant communities, and at night the rodents in pine forest, oak-alder forest and finally in the subalpine grassland. Conclusions: The rodents were the main seeds removers in areas with tree cover during the night, the insects in open areas at night, and birds in all plant communities during the daytime. Key words: birds, daytime and nighttime removal, insects, rodents, tree cover Remoción de semillas de pinos en tres comunidades vegetales templadas ResumenAntecedentes: Las estrategias de forrajeo pueden variar entre granívoros e impactar el reclutamiento de árboles y la biodiversidad de comunidades vegetales. Hipótesis: Las hipótesis fueron que: durante la noche en áreas con cobertura arbolada los roedores serán los principales removedores de semillas, los insectos en áreas abiertas en la noche; y las aves en todos los tipos de comunidades vegetales durante el día. Modelo matemático: La remoción de semillas por aves, roedores e insectos fue estudiada en un bosque templado mexicano. Con el fin de detectar diferencias en la remoción de semillas de Pinus patula, P. pseudostrobus, P. teocote and P. montezumae, un modelo GLMM con interacción de tres vías (tipo de comunidad vegetal, tratamiento de exclusión y periodo) fue llevado a cabo para cada especie de pino, donde las variables aleatorias fueron la variación entre sitios y los meses. Sitio de estudio y año de estudio: Este estudio fue llevado a cabo en un bosque templado mexicano durante Febrero 2006 a Enero del 2007. Métodos: Mediante tratamientos de exclusión nosotros evaluamos la remoción de semillas de cuatro especies de pinos en tres comunidades vegetales con dos replicas (1 ha aproximadamente) y en dos pe...

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Temporal structure of an ant community in semi‐arid Australia

Cited by 102 publications

References 18 publications

Temporal variation in extrafloral nectar secretion in different ontogenic stages of the fruits ofAlibertia verrucosaS. Moore (Rubiaceae) in a Neotropical savanna

Temporal variation in extrafloral nectar secretion in different ontogenic stages of the fruits ofAlibertia verrucosaS. Moore (Rubiaceae) in a Neotropical savanna

The trade‐off between thermal tolerance and behavioural dominance in a subtropical South American ant community

Pine seed removal in fragments of three temperate plant communities

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