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

abstract：:We examined the manner in which animals adjust the proportion of energy allocated to growth and storage in response to food availability. We compared univariate growth and length-mass relationships between juvenile adders (Vipera berus) reared under two different feeding regimes. Animals in the low- and high-food expe...

journal_title：Oecologia

authors： Forsman A,Lindell LE

更新日期：1996-12-01 00:00:00

abstract：:Plant species and functionally related species groups from arid and semi-arid habitats vary in their capacity to take up summer precipitation, acquire nitrogen quickly after summer precipitation, and subsequently respond with ecophysiological changes (e.g. water and nitrogen relations, gas exchange). For species that ...

journal_title：Oecologia

authors： Snyder KA,Donovan LA,James JJ,Tiller RL,Richards JH

更新日期：2004-10-01 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：:In cloud forest at Monteverde, Costa Rica, two common treelets (Palicourea lasiorrachis and Cephaelis elata, both Rubiaceae) depend simultaneously on one hummingbird population (Lampornis calolaema) for pollination. Both species are distylous and self-incompatible. In laboratory experiments, we examined possible effec...

journal_title：Oecologia

authors： Feinsinger P,Busby WH,Tiebout HM 3rd

更新日期：1988-08-01 00:00:00

abstract：:In fasting Pisidium amnicum and Sphaerium corneum, regular periods of behavioural and metabolic quiescence were shown to occur in the normoxic, constant environment of the flow-through chamber of a heat-flow microcalorimeter. The metabolic rate was suppressed to 7.5% of normal at 10° C and to 8.5-9.7% at 20° C for per...

journal_title：Oecologia

authors： Holopainen IJ,Penttinen OP

更新日期：1993-03-01 00:00:00

abstract：:The effects of tree height on shoot traits may in some cases differ in magnitude and direction from the effects of light. Nevertheless, general patterns of change in shoot traits in relation to variations in height and light have not so far been revealed. A comprehensive analysis of the differences between the effects...

journal_title：Oecologia

authors： Osada N,Okabe Y,Hayashi D,Katsuyama T,Tokuchi N

更新日期：2014-01-01 00:00:00

abstract：:The δ 13C, ‰ values of the two principal, widely distributed CAM species in Big Bend National Park, Texas, were examined and related to phytosociologic and macroclimatic parameters. Samples of Agave lecheguilla and Opuntia engelmannii were collected along an elevational gradient covering 1370 m, and δ values for both ...

journal_title：Oecologia

authors： Eickmeier WG,Bender MM

更新日期：1976-12-01 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：:Some individual plants of the mustard Brassica nigra in lowland California kill eggs of the Crucifer-specialist herbivores Pieris rapae and P. napi by producing a necrotic zone at the base of the egg, thereby apparently desicating it. This is a typical hypersensitivity reaction, but to an atypical stimulus. The eggs c...

journal_title：Oecologia

authors： Shapiro AM,DeVay JE

更新日期：1987-03-01 00:00:00

abstract：:Predation by Saduria entomon on the depositfeeding amphipods Monoporeia (=Pontoporeia) affinis and Pontoporeia femorata was studied in laboratory experiments. Prey vulnerabilities were compared in singleprey treatments and in mixed-prey treatments, where the proportions of the two species were varied at one total dens...

journal_title：Oecologia

authors： Hill C,Elmgren R

更新日期：1992-08-01 00:00:00

abstract：:Species distributions are dependent on interactions with abiotic and biotic factors in the environment. Abiotic factors like temperature, moisture, and soil nutrients, along with biotic interactions within and between species, can all have strong influences on spatial distributions of plants and animals. Terrestrial A...

journal_title：Oecologia

authors： Potts LJ,Gantz JD,Kawarasaki Y,Philip BN,Gonthier DJ,Law AD,Moe L,Unrine JM,McCulley RL,Lee RE Jr,Denlinger DL,Teets NM

更新日期：2020-12-01 00:00:00

abstract：:The invasion by winter-annual grasses (AGs) such as Bromus tectorum into sagebrush steppe throughout the western USA is a classic example of a biological invasion with multiple, interacting climate, soil and biotic factors driving the invasion, although few studies have examined all components together. Across a 6000-...

journal_title：Oecologia

authors： Bansal S,Sheley RL

更新日期：2016-06-01 00:00:00

abstract：:This study examined the effects of elevated CO2 on secondary metabolites for saplings of tropical trees. In the first experiment, nine species of trees were grown in the ground in open-top chambers in central Panama at ambient and elevated CO2 (about twice ambient). On average, leaf phenolic contents were 48% higher u...

journal_title：Oecologia

authors： Coley P,Massa M,Lovelock C,Winter K

更新日期：2002-09-01 00:00:00

abstract：:A two year comparative field water relations study was conducted in central Maryland on three sympatric temperate lianas, Lonicera japonica, Vitis vulpina and Parthenocissus quinquefolia. Seasonal physiological activity was longer by approximately 9 weeks in the evergreen L. japonica, while peak rates of stem elongati...

journal_title：Oecologia

authors： Bell DJ,Forseth IN,Teramura AH

更新日期：1988-01-01 00:00:00

abstract：:Geographic variation in species interactions can have major effects on species distributions and can be important for the resistance of resident communities to invasive species. We tested the hypothesis that coexistence or replacement of a resident North American mosquito Aedes aegypti with the invasive Aedes albopict...

journal_title：Oecologia

authors： Leisnham PT,Juliano SA

更新日期：2010-09-01 00:00:00

abstract：:Stomata of paper birch (Betula papyrifera Marsh.) seedlings were more open at high humidity than at low humidity and responded rapidly to changes in vapor pressure deficit. SO2 at 0.2 or 0.8 μl l-1 caused partial stomatal closure. Seedlings fumigated with SO2 at 0.2 or 0.5 μl l-1 for 30 h or 0.2 μl l-1 for 75 h took u...

journal_title：Oecologia

authors： Norby RJ,Kozlowski TT

更新日期：1982-04-01 00:00:00

abstract：:In mutualistic interactions, partners obtain a net benefit, but there may also be costs associated with the provision of benefits for a partner. The question of whether aphids suffer such costs when attended by ants has been raised in previous work. Transgenerational effects, where offspring phenotypes are adjusted ba...

journal_title：Oecologia

authors： Tegelaar K,Glinwood R,Pettersson J,Leimar O

更新日期：2013-11-01 00:00:00

abstract：:1. The defecation behavior of the parasitoid larvae of Aleochara curtula in the Calliphora puparium was described. After occupation of the puparium the first-instar larva begins to defecate. With these excrements the larva closes the entry hole. Afterwards the first-instar larva as well as later the second-instar larv...

journal_title：Oecologia

authors： Fuldner D,Pfenning R

更新日期：1973-06-01 00:00:00

abstract：: Fluorogenic substrate analogues (MUF substrates) are very sensitive in detecting hydrolytic enzymes. This method was adapted for the quantitative analysis of extracellular enzymes in snails and other animals. It was then used to determine cellobiase, chitobiase, protease, esterase, phosphatase and lipase in the diges...

journal_title：Oecologia

authors： Brendelberger H

更新日期：1996-12-01 00:00:00

abstract：:The paper considers a model of competition, based upon the Lotka-Volterra equations, which explicitly considers the effect of density independent mortality upon the outcome of competition. The model's possible application to wild Drosophila species in Europe are considered. ...

journal_title：Oecologia

authors： Shorrocks B,Begon M

更新日期：1975-12-01 00:00:00

abstract：:Food availability is thought to strongly influence the leaving phase of natal dispersal in animals with condition-dependent dispersal. We conducted a food supplementation experiment to determine the influence of extra food on the onset of dispersal and early dispersal movement patterns of 42 radio-tagged northern gosh...

journal_title：Oecologia

authors： Kennedy PL,Ward JM

更新日期：2003-01-01 00:00:00

abstract：:Existing models of microtine population regulation and life history evolution rely on data derived from empirical studies which assume spatial homogeneity of the sampling unit, and infer that population dynamics can be described adequately by aggregation of individuals differing in sex, age and social status. These as...

journal_title：Oecologia

authors： Cockburn A,Lidicker WZ Jr

更新日期：1983-09-01 00:00:00

abstract：:Clone mal9, a genotype ofSolanum dulcamara L. having photosynthetic characteristics similar to previously hypothesized shade ecotypes, is compared to five other genotypes having photosynthetic characteristics similar to previously hypothesized sun ecotypes. The primary differences are a 35% reduction in total leaf con...

journal_title：Oecologia

authors： Clough JM,Alberte RS,Teeri JA

更新日期：1980-01-01 00:00:00

abstract：:Plants are often attacked by many herbivorous insects and pathogens at the same time. Two important suites of responses to attack are mediated by plant hormones, jasmonate and salicylate, which independently provide resistance to herbivorous insects and pathogens, respectively. Several lines of evidence suggest that t...

journal_title：Oecologia

authors： Thaler JS,Karban R,Ullman DE,Boege K,Bostock RM

更新日期：2002-04-01 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：:Plant species composition is changing across many landscapes, but it is unclear how these changes affect habitat quality for animals. We used functional diversity and community-weighted mean (CWM) trait values for four plant traits (litter N, P, lignin and soluble phenolics) to explore how changes in plant species com...

journal_title：Oecologia

authors： Cohen JS,Rainford SK,Blossey B

更新日期：2014-04-01 00:00:00

abstract：:Behavioral games predators play among themselves may have profound effects on behavioral games predators play with their prey. We studied the behavioral game between predators and prey within the framework of social foraging among predators. We tested how conspecific interactions among predators (little egret) change ...

journal_title：Oecologia

authors： Vardi R,Abramsky Z,Kotler BP,Altstein O,Rosenzweig ML

更新日期：2017-07-01 00:00:00

abstract：:We reared larvae of three generalist insect species on plants occurring in their habitats. Individuals of each species were kept either on mixed diets, or on each plant species separately. We measured food plant preference in the mixed-diet group and compared insect performance on single plants to the performance on t...

journal_title：Oecologia

authors： Hägele BF,Rowell-Rahier M

更新日期：1999-06-01 00:00:00

abstract：:Difficulties in using genetic markers to demonstrate that changes in gene frequency cause fluctuations in the density of animal populations are illustrated. The frequency of chicks with light-coloured down increased during 4 years when population density of red grouse declined and the inherent level of aggressive beha...

journal_title：Oecologia

authors： Moss R,Watson A

更新日期：1987-10-01 00:00:00

abstract：:Although host preferences in phytophagous insects may be generated by several factors, few studies have simultaneously examined several potential host choice determinants. In this study we tested the impact of the following potential host choice determinants on host preference of the semi-aquatic lepidopteran Munroess...

journal_title：Oecologia

authors： Dorn NJ,Cronin G,Lodge DM

更新日期：2001-08-01 00:00:00