Interactions between the coccid, Icerya seychellarum (Westw.), and its host tree species on Aldabra Atoll : I. Euphorbia pyrifolia Lam.

abstract：:The tropical ants Ectatomma ruidum and E. tuberculatum (Formicidae) regularly patrol leaves, flowers, and fruits of the understory shrub, Psychotria limonensis (Rubiaceae), on Barro Colorado Island, Panama. Ant and pollinator exclusion experiments elucidated both positive and negative effects of ant attendance on plan...

journal_title：Oecologia

authors： Altshuler DL

更新日期：1999-06-01 00:00:00

abstract：:The food selection of the common goby, Pomatoschistus microps Krøyer, was studied in the field and in laboratory experiments on the Swedish west coast. The three most important prey organisms for P. microps in the study area were Corophium volutator, chironomid larvae and Nereis spp. Corophium was consumed more than a...

journal_title：Oecologia

authors： Magnhagen C,Wiederholm AM

更新日期：1982-12-01 00:00:00

abstract：:Understanding how communities respond to extreme climatic events is important for predicting the impact of climate change on biodiversity. The plant vigor and stress hypotheses provide a theoretical framework for understanding how arthropods respond to stress, but are rarely tested at the community level. Following a ...

journal_title：Oecologia

authors： Stone AC,Gehring CA,Whitham TG

更新日期：2010-11-01 00:00:00

abstract：:Numerous mechanisms are proposed to explain why exotic plants successfully invade natural communities. However, the positive effects of native engineers on exotic plant species have received less consideration. We tested whether the nutrient-rich soil patches created by a native ecological engineer (refuse dumps from ...

journal_title：Oecologia

authors： Farji-Brener AG,Lescano N,Ghermandi L

更新日期：2010-05-01 00:00:00

abstract：:We measured the response of dark respiration (R(d)) to temperature and foliage characteristics in the upper canopies of tree species in temperate rainforest communities in New Zealand along a soil chronosequence (six sites from 6 years to 120,000 years). The chronosequence provided a vegetation gradient characterised ...

journal_title：Oecologia

authors： Turnbull MH,Tissue DT,Griffin KL,Richardson SJ,Peltzer DA,Whitehead D

更新日期：2005-03-01 00:00:00

abstract：:The seasonal changes in plant community architecture and its importance to insect herbivores during the ruderal-early stages of an experimental secondary successional gradient are described. The dominant group of insect herbivores, the Auchenorrhyncha (Hemiptera: Homoptera) are considered together with their host plan...

journal_title：Oecologia

authors： Stinson CS,Brown VK

更新日期：1983-01-01 00:00:00

abstract：:Bryophytes dominate the carbon and nitrogen cycling of many poorly drained terrestrial ecosystems and are important in the vegetation-atmosphere exchange of carbon and water, yet few studies have estimated their leaf area at the stand scale. This study quantified the bryophyte-specific leaf area (SLA) and leaf area in...

journal_title：Oecologia

authors： Bond-Lamberty B,Gower ST

更新日期：2007-04-01 00:00:00

abstract：:In this study, we investigated whether free-living insectivorous water pipits (Anthus spinoletta) choose prey according to biochemical quality as measured by protein, lipid, carbohydrate, energy and water contents and/or according to profitability as measured by density, size and catchability. Food preference - expres...

journal_title：Oecologia

authors： Brodmann PA,Reyer HU

更新日期：1999-09-01 00:00:00

abstract：:The remains of northern fur seals (Callorhinus ursinus) are among the most abundant of pinniped elements recovered from mainland coastal archaeological sites in both California and Oregon. This is surprising as all contemporary northern fur seals breed exclusively on offshore islands, primarily at high latitudes, and ...

journal_title：Oecologia

authors： Burton RK,Snodgrass JJ,Gifford-Gonzalez D,Guilderson T,Brown T,Koch PL

更新日期：2001-06-01 00:00:00

abstract：:Anuran amphibians have traditionally been considered suitable model organisms for community ecology studies. In this paper, we review and quantitatively re-analyze the original studies published on dietary relationships among anuran communities worldwide. We re-analyzed 33 independent communities from all continents, ...

journal_title：Oecologia

authors： Vignoli L,Luiselli L

更新日期：2012-06-01 00:00:00

abstract：:Invasive species-species that have successfully overcome the barriers of transport, introduction, establishment, and spread-are a risk to biodiversity and ecosystem function. Introduction effort is one of the main factors underlying invasion success, but life history traits are also important as they influence populat...

journal_title：Oecologia

authors： van der Marel A,Waterman JM,López-Darias M

更新日期：2021-01-22 00:00:00

abstract：:Seeds dispersed by tropical, arboreal mammals are usually deposited singly and without dung or in clumps of fecal material. After dispersal through defecation by mammals, most seeds are secondarily dispersed by dung beetles or consumed by rodents. These post-dispersal, plant-animal interactions are likely to interact ...

journal_title：Oecologia

authors： Andresen E,Levey DJ

更新日期：2004-03-01 00:00:00

abstract：:Corridors connect otherwise isolated habitat patches and can direct movement of animals among such patches. In eight experimental landscapes, we tested two hypotheses of how corridors might affect dispersal behavior. The Traditional Corridor hypothesis posits that animals preferentially leave patches via corridors, fo...

journal_title：Oecologia

authors： Fried JH,Levey DJ,Hogsette JA

更新日期：2005-05-01 00:00:00

abstract：:Plants of white clover Trifolium repens were grown under the canopies of three grass species, Lolium perenne, Agrostis tenuis and Holcus lanatus, and under simulated canopies of black polythene and controls were exposed to unfiltered natural radiation. The canopies were adjusted so that they transmitted equal intensit...

journal_title：Oecologia

authors： Thompson L,Harper JL

更新日期：1988-04-01 00:00:00

abstract：:Trirhabda bacharidis (Weber) (Chrysomelidae), a univoltine, monophagous beetle is the dominant herbivore on Baccharis halimifolia (Compositae), a woody, perennial shrub that leafs out in early spring and retains its leaves into November. Available plant biomass increases during the season but T. bacharidis feeds only ...

journal_title：Oecologia

authors： Kraft SK,Denno RF

更新日期：1982-02-01 00:00:00

abstract：:Decomposition of standing dead trees that were killed by fire was examined for 10 species in the Great Smoky Mountains National Park. The decrease in wood density as fire age increased was used to estimate decomposition rates. Quercus prinus had the fastest decay rate (11% yr-1) while Pinus virginiana had the slowest ...

journal_title：Oecologia

authors： Harmon ME

更新日期：1982-02-01 00:00:00

abstract：:Ectomycorrhizal (EM) fungi form relationships with higher plants; plants transfer C to fungi, and fungi transfer nutrients to their host. While evidence indicates that this interaction is largely mutualistic, less is known about how nutrient supply and EM associates may alter C and nutrient exchanges, especially in in...

journal_title：Oecologia

authors： Albarracín MV,Six J,Houlton BZ,Bledsoe CS

更新日期：2013-12-01 00:00:00

abstract：:Competition for water surface prey between fish (Priapichtus annectens: Poeciliidae) and water striders (Potamobates unidentatus: Gerridae) was studied in the laboratory and in pools in a small tropical stream. Laboratory experiments showed that fish depressed activity and foraging success of water striders. Large fis...

journal_title：Oecologia

authors： Englund G,Johansson F,Olsson TI

更新日期：1992-12-01 00:00:00

abstract：:Locomotory efficiency and potential has been studied in three species of the waterboatman Notonecta in relation to the predation strategies of these bugs.Morphometric analysis, estimating likely relative drag forces, mechanical advantages of the swimming legs and leg length/body length ratios allowed an estimation of ...

journal_title：Oecologia

authors： Giller PS

更新日期：1982-02-01 00:00:00

abstract：:Ecosystem water-use efficiency (eWUE; the ratio of net ecosystem productivity to evapotranspiration rate) is a complex landscape-scale parameter controlled by both physical and biological processes occurring in soil and plants. Leaf WUE (lWUE; the ratio of leaf CO(2) assimilation rate to transpiration rate) is control...

journal_title：Oecologia

authors： Monson RK,Prater MR,Hu J,Burns SP,Sparks JP,Sparks KL,Scott-Denton LE

更新日期：2010-02-01 00:00:00

abstract：:Populations of dioecious plant species often exhibit biased sex ratios. Such biases may arise as a result of sex-based differences in life history traits, or as a result of spatial segregation of the sexes. Of these, sex-based differentiation in life history traits is likely to be the most common cause of bias. In dio...

journal_title：Oecologia

authors： Nicotra AB

更新日期：1998-06-01 00:00:00

abstract：:We compared movement patterns and rhythms of activity of a top predator, the Iberian lynx Lynx pardinus, a mesopredator, the red fox Vulpes vulpes, and their shared principal prey, the rabbit Oryctolagus cuniculus, in relation to moon phases. Because the three species are mostly nocturnal and crepuscular, we hypothesi...

journal_title：Oecologia

authors： Penteriani V,Kuparinen A,del Mar Delgado M,Palomares F,López-Bao JV,Fedriani JM,Calzada J,Moreno S,Villafuerte R,Campioni L,Lourenço R

更新日期：2013-11-01 00:00:00

abstract：:Relationships involving fire and perennial grasses are controversial in Chihuahuan Desert grasslands of southern New Mexico, USA. Research suggests that fire delays the resprouting of perennial grasses well after two growing seasons. However, such results are confounded by livestock grazing, soil erosion, and drought....

journal_title：Oecologia

authors： Drewa PB,Peters DP,Havstad KM

更新日期：2006-11-01 00:00:00

abstract：:Natural history collections are now being championed as key to broad ecological studies, especially those involving human impacts in the Anthropocene. However, collections are going through a crisis that threatens their present and future value, going beyond underfunding/understaffing to a more damaging practice: curr...

journal_title：Oecologia

authors： Salvador RB,Cunha CM

更新日期：2020-03-01 00:00:00

abstract：:The intermediate disturbance hypothesis (IDH) predicts that species diversity is maximized at moderate disturbance levels. This model is often applied to grassy ecosystems, where disturbance can be important for maintaining vascular plant composition and diversity. However, effects of disturbance type and frequency on...

journal_title：Oecologia

authors： O'Bryan KE,Prober SM,Lunt ID,Eldridge DJ

更新日期：2009-04-01 00:00:00

abstract：:Ecologists routinely set out to estimate the trophic position of individuals, populations, and species composing food webs, and nitrogen stable isotopes (δ(15)N) are a widely used proxy for trophic position. Although δ(15)N values are often sampled at the level of individuals, estimates and confidence intervals are fr...

journal_title：Oecologia

authors： Reum JC,Marshall KN

更新日期：2013-12-01 00:00:00

abstract：:Root proliferation in nutrient-rich soil patches is an important mechanism facilitating nutrient capture by plants. Although the phenomenon of root proliferation is well documented, the specific timing of this proliferation has not been investigated. We studied the timing and degree of root proliferation for three per...

journal_title：Oecologia

authors： Jackson RB,Caldwell MM

更新日期：1989-10-01 00:00:00

abstract：:Cladoceran hatching frequency can easily be calculated from observed egg age distribution and estimated egg development time. The large timelag errors of models incorporating birth rates in the equation are avoided, and the population growth rate can be estimated directly. ...

journal_title：Oecologia

authors： Johnsen G

更新日期：1983-11-01 00:00:00

abstract：:In a typical Dutch polder landscape the effects of nutrient transport from cultivated grassland to mesotrophic fen communities were studied. In a comparative approach, biomass production and nutrient (N, P and K) uptake were determined monthly in four fens and a hayfield differeing in productivity and species composit...

journal_title：Oecologia

authors： Verhoeven JT,van Beek S,Dekker M,Storm W

更新日期：1983-10-01 00:00:00

abstract：:Pheasants (Phasianus colchicus) and grey partridges (Perdix perdix) were maintained together on land known to be contaminated with eggs of the caecal nematode Heterakis gallinarum to examine the hypothesis that this shared parasite has a greater impact on grey partridges than on pheasants. Since an inverse relationshi...

journal_title：Oecologia

authors： Tompkins DM,Dickson G,Hudson PJ

更新日期：1999-05-01 00:00:00