Indirect effects of mutualism: ant-treehopper associations deter pollinators and reduce reproduction in a tropical shrub.


:Animal-pollinated plants can be susceptible to changes in pollinator availability. Honeydew-producing treehoppers frequently occur on inflorescences, potentially enhancing ant-mediated negative effects on pollination services. However, the effect of ant-attended, honeydew-producing insects on plant reproduction remains uncertain. We recorded the abundance of treehoppers and ants on Byrsonima intermedia (Malpighiaceae), and monitored floral visitors in a Brazilian cerrado savanna. We manipulated the presence of ants and ant-treehopper associations on inflorescences to assess their effect on pollination and fruit formation. We used dried ants pinned to inflorescences to evaluate the effect of ant presence and ant identity on potential pollinators. Results show that the presence of treehoppers increases ant abundance on flowers and disrupts pollination by oil-collecting bees, decreasing the frequency and duration of floral visits and reducing fruit and seed set. Treehopper herbivory has no direct effect on fruit or seed production, which are independent of treehopper density. Pinned ants promote avoidance by floral visitors, reducing the number of visits. Ant identity mediates visitation decisions, with Ectatomma brunneum causing greater avoidance by floral visitors than Camponotus rufipes. Field videos show that pollinating bees are harassed by ants near flowers, prompting avoidance behavior by the bees. This is the first demonstration of indirect effects by honeydew-gathering ants, via disrupted pollination, on plant reproduction in tropical cerrado savanna. Our results highlight the importance of studying other interactions near flowers, in addition to just observing pollinators, for a proper understanding of plant reproduction.






Ibarra-Isassi J,Oliveira PS




Has Abstract


2018-03-01 00:00:00














  • Testing the low latitude/high defense hypothesis for broad-leaved tree species.

    abstract::We tested the hypothesis that leaves of broad-leaved tree species are more highly defended at low latitudes than at high latitudes. We used canonical discriminant analysis to compare tree species from Panama (9°N, 39 species), Missouri, USA (38°N, 37 species), and southern Ontario, Canada (44°N, 34 species) with respe...


    pub_type: 杂志文章


    authors: Marquis RJ,Ricklefs RE,Abdala-Roberts L

    更新日期:2012-07-01 00:00:00

  • Induced responses in three alkaloid-containing plant species.

    abstract::In this paper we test three plant species for the inducibility of their alkaloid production. The plants were heavily damaged by cutting off 50% of their leaf surface using a pair of scissors. The cut-off leaf tips were used as controls for possible diurnal fluctuations. After 3, 6, 12, 24 and 48 h, respectively, the l...


    pub_type: 杂志文章


    authors: van Dam NM,van der Meijden E,Verpoorte R

    更新日期:1993-09-01 00:00:00

  • Prey adaptation along a competition-defense tradeoff cryptically shifts trophic cascades from density- to trait-mediated.

    abstract::Trophic cascades have become a dominant paradigm in ecology, yet considerable debate remains about the relative strength of density- (consumptive) and trait-mediated (non-consumptive) effects in trophic cascades. This debate may, in part, be resolved by considering prey experience, which shapes prey traits (through ge...


    pub_type: 杂志文章


    authors: Wood ZT,Fryxell DC,Moffett ER,Kinnison MT,Simon KS,Palkovacs EP

    更新日期:2020-03-01 00:00:00

  • The effect of cold-induced increased metabolic rate on the rate of 13C and 15N incorporation in house sparrows (Passer domesticus).

    abstract::Animals with high metabolic rates are believed to have high rates of carbon and nitrogen isotopic incorporation. We hypothesized that (1) chronic exposure to cold, and hence an increase in metabolic rate, would increase the rate of isotopic incorporation of both 13C and 15N into red blood cells; and (2) that the rate ...


    pub_type: 杂志文章


    authors: Carleton SA,Martínez del Rio C

    更新日期:2005-06-01 00:00:00

  • Induced resistance to Mexican bean beetles in soybean: variation among genotypes and lack of correlation with constitutive resistance.

    abstract::Fourteen genotypes (varieties) of soybean (Glycine max) were screened for levels of induced resistance to Mexican bean beetle (Epilachna varivestis) damage, and a subset of 6 of those varieties was screened for levels of constitutive resistance to Mexican bean beetles. Experiments were carried out in the greenhouse, w...


    pub_type: 杂志文章


    authors: Underwood N,Morris W,Gross K,Lockwood Iii JR

    更新日期:2000-01-01 00:00:00

  • Age at flowering differentially affects vegetative and reproductive responses of a determinate annual plant to elevated carbon dioxide.

    abstract::Plant population and community dynamics may be altered by increasing atmospheric CO(2) concentrations [[CO(2)]] through intraspecific variation in the responses of vegetative and reproductive growth. Although these responses may be regulated by age at flowering, little is known about the direct effects of age at flowe...


    pub_type: 杂志文章


    authors: Lewis JD,Wang X,Griffin KL,Tissue DT

    更新日期:2003-04-01 00:00:00

  • Tropical marine herbivore assimilation of phenolic-rich plants.

    abstract::Phenolics in marine brown algae have been thought to follow a latitudinal gradient with high phenolic species in high latitudes and low phenolic species in low latitudes. However, tropical brown algae from the western Caribbean have been shown to be high in phlorotannin concentration, indicating that latitude alone is...


    pub_type: 杂志文章


    authors: Targett NM,Boettcher AA,Targett TE,Vrolijk NH

    更新日期:1995-08-01 00:00:00

  • The site of settlement indicates commensalism between bluemussel and its epibiont.

    abstract::The site of settlement of barnacles (Balanus improvisus) attached on shells of bluemussels (Mytilus edulis) was mapped from a sample of mussels collected in the Baltic Sea. Most barnacles had settled near the siphonal apertures of the mussel. An experiment was made to measure the disadvantages and advantages that livi...


    pub_type: 杂志文章


    authors: Laihonen P,Furman ER

    更新日期:1986-12-01 00:00:00

  • Offspring growth, survival and reproductive success in the bank vole: a litter size manipulation experiment.

    abstract::To estimate the optimality of brood size, it is essential to study the effects of brood size manipulation on offspring survival and reproductive success. Moreover, testing the generality of the hypothesis of reproductive costs requires experimental data from a diversity of organisms. Here I present data on the growth,...


    pub_type: 杂志文章


    authors: Koskela E

    更新日期:1998-07-01 00:00:00

  • Cues of intraguild predators affect the distribution of intraguild prey.

    abstract::Theory on intraguild (IG) predation predicts that coexistence of IG-predators and IG-prey is only possible for a limited set of parameter values, suggesting that IG-predation would not be common in nature. This is in conflict with the observation that IG-predation occurs in many natural systems. One possible explanati...


    pub_type: 杂志文章


    authors: Choh Y,van der Hammen T,Sabelis MW,Janssen A

    更新日期:2010-06-01 00:00:00

  • A novel trade-off of insect diapause affecting a sequestered chemical defense.

    abstract::Diapause allows insects to temporally avoid conditions that are unfavorable for development and reproduction. However, diapause may incur a cost in the form of reduced metabolic energy reserves, reduced potential fecundity, and missed reproductive opportunities. This study investigated a hitherto ignored consequence o...


    pub_type: 杂志文章


    authors: Fordyce JA,Nice CC,Shapiro AM

    更新日期:2006-08-01 00:00:00

  • Nestling diet variation in an insular Mediterranean population of blue tits Parus caeruleus: effects of years, territories and individuals.

    abstract::Mediterranean evergreen forests of Corsica are characterized by relatively high species diversity of arthropods with low population densities. Food is never superabundant for Corsican blue tits Parus caeruleus. This study focused on the composition of the food of blue tit nestlings and especially on two main component...


    pub_type: 杂志文章


    authors: Bańbura J,Blondel J,de Wilde-Lambrechts H,Galan MJ,Maistre M

    更新日期:1994-12-01 00:00:00

  • Productivity of Agave deserti: measurement by dry weight and monthly prediction using physiological responses to environmental parameters.

    abstract::An "environmental productivity index" based on physiological responses to three environmental variables was used to predict the net productivity of a common succulent perennial of the Sonoran Desert, Agave deserti, on a monthly basis. Productivity was also independently measured in the field from dry weight changes. T...


    pub_type: 杂志文章


    authors: Nobel PS

    更新日期:1984-09-01 00:00:00

  • Foraging behavior of a freshwater copepod: Frequency changes in looping behavior at high and low prey densities.

    abstract::The foraging behavior of Mesocyclops edax in artificial patches of high and low prey density was examined. In low density patches Mesocyclops swam in an irregular curvilinear path with little or no looping behavior. In high density patches Mesocyclops exhibited extensive horizontal and vertical looping behavior. Horiz...


    pub_type: 杂志文章


    authors: Williamson CE

    更新日期:1981-09-01 00:00:00

  • Habitat selection by capercaillie in summer and autumn: Is bilberry important?

    abstract::The use of habitat by female and male adult capercaillie Tetrao urogallus during summer and autumn was studied by comparing the distribution of radio locations of birds with the availability of habitat at forest stand, home range and landscape level in an area of the Bavarian Alps, Germany. Capercaillie preferred fore...


    pub_type: 杂志文章


    authors: Storch I

    更新日期:1993-08-01 00:00:00

  • Niche differentiation between diploid and hexaploid Aster amellus.

    abstract::The maintenance of separated diploid and polyploid populations within a contact zone is possible due to both prezygotic and postzygotic isolation mechanisms. Niche differentiation between two cytotypes may be an important prezygotic isolating mechanism and can be studied using reciprocal transplant experiments. We inv...


    pub_type: 杂志文章


    authors: Raabová J,Fischer M,Münzbergová Z

    更新日期:2008-12-01 00:00:00

  • Dynamics of the association between a long-lived understory myrmecophyte and its specific associated ants.

    abstract::Myrmecophytic symbioses are widespread in tropical ecosystems and their diversity makes them useful tools for understanding the origin and evolution of mutualisms. Obligate ant-plants, or myrmecophytes, provide a nesting place, and, often, food to a limited number of plant-ant species. In exchange, plant-ants protect ...


    pub_type: 杂志文章


    authors: Orivel J,Lambs L,Malé PJ,Leroy C,Grangier J,Otto T,Quilichini A,Dejean A

    更新日期:2011-02-01 00:00:00

  • Cotton compensatory growth after loss of reproductive organs as affected by availability of resources and duration of recovery period.

    abstract::Damaged cotton plants in which reproductive organs were manually removed to simulate shedding induced by Helicoverpa spp. (Lepidoptera) were compared with undamaged controls grown under contrasting availability of resources. Plant growth and partitioning were analysed and fruit mass was taken as a measure of compensat...


    pub_type: 杂志文章


    authors: Sadras VO

    更新日期:1996-06-01 00:00:00

  • Structure of herbivore communities in two oak (Quercus spp.) hybrid zones.

    abstract::We examined patterns of density and species diversity for leaf-mining Lepidopterans and gall-forming Hymenopterans in two oak (Quercus spp.) hybrid zones: Quercus depressipes x Q. rugosa and Q. emoryi x Q. coccolobifolia. In both species complexes, hybrid hosts typically supported significantly lower densities and spe...


    pub_type: 杂志文章


    authors: Boecklen WJ,Spellenberg R

    更新日期:1990-11-01 00:00:00

  • The resistance of Pteridium aquilinum (L.) Kuhn to insect attack by Trichoplusia ni (Hübn.).

    abstract::Resistance of Pteridium aquilinum to insect attack was studied by incorporating air dried bracken leaf meal and extracts of bracken leaf meal into an artificial diet for Trichoplusia ni (Lepidoptera: Noctuidae). When larvae are reared on diets containing 6% bracken leaf meal, they do not mature past the second instar ...


    pub_type: 杂志文章


    authors: Hendrix SD

    更新日期:1977-12-01 00:00:00

  • A demographic approach to understanding the effects of climate on population growth.

    abstract::Amphibian life history traits are affected by temperature and precipitation. Yet, connecting these relationships to population growth, especially for multiple populations within a species, is lacking and precludes our understanding of amphibian population dynamics and distributions. Therefore, we constructed integral ...


    pub_type: 杂志文章


    authors: Caruso NM,Staudhammer CL,Rissler LJ

    更新日期:2020-08-01 00:00:00

  • Strong density-dependent survival and recruitment regulate the abundance of a coral reef fish.

    abstract::Debate on the control of population dynamics in reef fishes has centred on whether patterns in abundance are determined by the supply of planktonic recruits, or by post-recruitment processes. Recruitment limitation implies little or no regulation of the reef-associated population, and is supported by several experimen...


    pub_type: 杂志文章


    authors: Forrester GE

    更新日期:1995-08-01 00:00:00

  • Impacts of invasive plant species on riparian plant assemblages: interactions with elevated atmospheric carbon dioxide and nitrogen deposition.

    abstract::Resource competition is commonly invoked to explain negative effects of invasive plants on native plant abundance. If invasives out-compete natives, global changes that elevate resource availability may interact with invasives to exacerbate impacts on native communities. Indeed, evidence is accumulating that elevated ...


    pub_type: 杂志文章


    authors: Bradford MA,Schumacher HB,Catovsky S,Eggers T,Newingtion JE,Tordoff GM

    更新日期:2007-07-01 00:00:00

  • Resource limitation of tephritid flies on lesser burdock, Arctium minus (Hill) Bernh. (Compositae).

    abstract::The intensity of resource exploitation by phytophagous insects is usually considered to reflect population size. For populations of two flowerhead-attacking tephritid flies, however, the resources utilised were not related to the numbers of searching adults. Tephritis bardanae Schrank attacked 11-13% of the total flow...


    pub_type: 杂志文章


    authors: Straw NA

    更新日期:1991-05-01 00:00:00

  • Changes in resource concentration and defence during leaf development in a tough-leaved (Nothofagus moorei) and soft-leaved (Toona ciliata) species.

    abstract::Developing leaves that are soft, with high concentrations of resources, can be particularly vulnerable to herbivore damage. Since a developing leaf cannot be very tough, given the constraints of cell expansion, the major form of protection is likely to be chemical defence. We investigated changes in concentration of h...


    pub_type: 杂志文章


    authors: Brunt C,Read J,Sanson GD

    更新日期:2006-07-01 00:00:00

  • Overlap in nitrogen sources and redistribution of nitrogen between trees and grasses in a semi-arid savanna.

    abstract::A key question in savanna ecology is how trees and grasses coexist under N limitation. We used N stable isotopes and N content to study N source partitioning across seasons from trees and associated grasses in a semi-arid savanna. We also used (15)N tracer additions to investigate possible redistribution of N by trees...


    pub_type: 杂志文章


    authors: Priyadarshini KV,Prins HH,de Bie S,Heitkönig IM,Woodborne S,Gort G,Kirkman K,Fry B,de Kroon H

    更新日期:2014-04-01 00:00:00

  • Ecological specialization of Hawaiian Drosophila : II. The community matrix, ecological complementation, and phyletic species packing.

    abstract::The ecological overlap of three species of Hawaiian Drosophila: D. mimica D. kambysellisi, and D. imparisetae, has been investigated by analysis of the community matrix. The basic model is a Lotka-Volterra formulation, suitably expanded to include sexual dimorphism. We have also investigated equilibrium population siz...


    pub_type: 杂志文章


    authors: Richardson RH,Smouse PE

    更新日期:1975-03-01 00:00:00

  • Behavioural versus physiological mediation of life history under predation risk.

    abstract::Predator-generated variation in prey energy intake remains the dominant explanation of adaptive response to predation risk in prey life history, morphology and physiology across a wide range of taxa. This "behavioural hypothesis" suggest that chemical or visual signals of predation risk reduce prey energy intake leadi...


    pub_type: 杂志文章


    authors: Beckerman AP,Wieski K,Baird DJ

    更新日期:2007-05-01 00:00:00

  • A test of energetic trade-offs between growth and immune function in watersnakes.

    abstract::Energy budgets explain how organisms allocate energetic intake to accomplish essential processes. A likely life history trade-off occurs between growth and immune response in juvenile organisms, where growth is important to avoid predation or obtain larger prey and immune response is essential to survival in the prese...


    pub_type: 杂志文章


    authors: Korfel CA,Chamberlain JD,Gifford ME

    更新日期:2015-10-01 00:00:00

  • Multiple feeding techniques in the sessile hermit crab, Discorsopagurus schmitti, inhabiting polychaete tubes.

    abstract::In the sessile hermit crab Discorsopagurus schmitti, four different feeding techniques are described: antennary beating, body-trap feeding, feeding on wafting particles, and scraping. This species' potential for being a generalist in its diet and opportunistic in its foraging behavior certainly opened the way for a se...


    pub_type: 杂志文章


    authors: Gherardi F

    更新日期:1994-07-01 00:00:00