The mechanisms generating community phylogenetic patterns change with spatial scale.

abstract：:Genotypes of the annual legume Amphicarpaea bracteata vary in their degree of specialization toward different nitrogen-fixing bacteria. Plants of lineages "Ib" and "II" are specialized for mutualism with a limited group of bacterial genotypes. Lineage "Ia" plants are symbiotic generalists, interacting with all bacteri...

journal_title：Oecologia

authors： Wilkinson HH,Parker MA

更新日期：1996-10-01 00:00:00

abstract：:A climate room is described for precise regulation of temperature and humidity. Humidity is regulated by regulation of the dew-point temperature of the air. The ranges for both dew-point and air temperature are from 2°C to 45°C. The precision of regulation for the temperature is ±0.05°C, for the dew-point temperature ...

journal_title：Oecologia

authors： Bruin MK,Brandt DC,Körner FJ

更新日期：1976-12-01 00:00:00

abstract：:Heterotrophic gains of carbon from various host species by the root hemiparasitic shrub Olax phyllanthi (Labill) R.Br. were assessed using techniques based on carbon isotope discrimination (δ13C) on C3 and C4 hosts and C:N ratios of xylem sap and dry matter of host and parasite. Heterotrophic benefits (H) to Olax base...

journal_title：Oecologia

authors： Tennakoon KU,Pate JS

更新日期：1996-02-01 00:00:00

abstract：:Determining how environmental conditions interact with individual intrinsic properties is important for unravelling the underlying mechanisms that drive variation in reproductive decisions among migratory species. We investigated the influence of sea ice conditions and body condition at arrival on the breeding propens...

journal_title：Oecologia

authors： Jean-Gagnon F,Legagneux P,Gilchrist G,Bélanger S,Love OP,Bêty J

更新日期：2018-01-01 00:00:00

abstract：:The structure and seasonal dynamics of phytoplankton communities in the littoral zone were compared between oligotrophic and eutrophic lakes in the southeastern United States. Differences in diversity and species composition between lakes could be ascribed to long-term variation in nutrients corresponding to trophic s...

journal_title：Oecologia

authors： Lemly AD,Dimmick JF

更新日期：1982-09-01 00:00:00

abstract：:Understanding the effects of invasive plants on native consumers is important because consumer-mediated indirect effects have the potential to alter the dynamics of coexistence in native communities. Invasive plants may promote changes in consumer pressure due to changes in protective cover (i.e., the architectural co...

journal_title：Oecologia

authors： Dutra HP,Barnett K,Reinhardt JR,Marquis RJ,Orrock JL

更新日期：2011-07-01 00:00:00

abstract：:The effect of N supply on shoot and leaf lifespan was investigated in established stands of four herbaceous Carex species which differed in maximum dry matter production. These species were, in rank order of increasing maximum dry matter production (per unit ground area): Carex diandra≤C. rostrata

journal_title：Oecologia

authors： Aerts R,de Caluwe H

更新日期：1995-06-01 00:00:00

abstract：:Enemy release often is invoked to explain the success of invasive plants: an invader benefits from reduced attack as it escapes specialized enemies through the invasion process. Enemy release typically is thought of as occurring at large geographic scales, but local-scale interactions may also be important for invader...

journal_title：Oecologia

authors： Nunes KA,Kotanen PM

更新日期：2018-09-01 00:00:00

abstract：:Sea lion and seal populations in Alaskan waters underwent various degrees of decline during the latter half of the twentieth century and the cause(s) for the declines remain uncertain. The stable carbon ((13)C/(12)C) and nitrogen ((15)N/(14)N) isotope ratios in bone collagen from wild Steller sea lions (Eumetopias jub...

journal_title：Oecologia

authors： Hirons AC,Schell DM,Finney BP

更新日期：2001-12-01 00:00:00

abstract：:Climate change is expected to reduce annual precipitation by 20% and increase its standard deviation by 20% in the eastern Mediterranean. We have examined how these changes may affect herbaceous aboveground net primary production (ANPP) and its inter-annual coefficient of variation (CV) in natural rangelands along a d...

journal_title：Oecologia

authors： Golodets C,Sternberg M,Kigel J,Boeken B,Henkin Z,Seligman NG,Ungar ED

更新日期：2015-04-01 00:00:00

abstract：:Twospotted spider mites, Tetranychus urticae Koch are arrhenotokous. As a result of this genetic structure, primary and secondary sex ratios diverge from the 1:1 female:male ratio commonly found in diploid systems. Ratios vary, but 3:1 is the most common. The influence of life history parameters on spider mite sex rat...

journal_title：Oecologia

authors： Krainacker DA,Carey JR

更新日期：1990-03-01 00:00:00

abstract：:Net photosynthesis (10 klx light intensity, 150 μE m-2 s-1 PAR) and dark respiration of the lichen Ramalina maciformis at different temperatures are measured in relation to thallus water content. Both first increase with increasing hydration. Dark respiration then remains constant with increased water content until th...

journal_title：Oecologia

authors： Lange OL

更新日期：1980-04-01 00:00:00

abstract：:One of the most commonly cited hypotheses explaining invasion success is the enemy release hypothesis (ERH), which maintains that populations are regulated by coevolved natural enemies where they are native but are relieved of this pressure in the new range. However, the role of resident enemies in plant invasion rema...

journal_title：Oecologia

authors： Bohl Stricker K,Stiling P

更新日期：2014-03-01 00:00:00

abstract：:Organic carbon-rich sediments from the surface of fresh, intermediate, brackish and salt marshes of coastal Louisiana were sampled and analyzed for their 13C content. The average ∂13C from all sites within each wetland type was-27.8‰,-22.1‰,-16.9‰, and-16.2‰, for fresh, intermediate, brackish and salt marshes, respect...

journal_title：Oecologia

authors： Chmura GL,Aharon P,Socki RA,Abernethy R

更新日期：1987-12-01 00:00:00

abstract：:We performed a factorial combination of seed additions, surface soil disturbance, and protection from potential seed predation in experimental plots to elucidate the relative importance of each factor in the recruitment of scarlet gilia seedlings. We detected a significant interaction between seed addition and surface...

journal_title：Oecologia

authors： Juenger T,Bergelson J

更新日期：2000-05-01 00:00:00

abstract：:The survival potential of lichens in a given habitat is determined by the response of CO2 exchange to photosynthetically active radiation (PhAR), thallus temperature, and thallus relative water content (RWC). Therefore morphologically similar lichens from contrasting climatic environments 1) should differ in their CO2...

journal_title：Oecologia

authors： Lechowicz MJ

更新日期：1978-01-01 00:00:00

abstract：:Foragers of the leafcutting ant, Atta cephalotes L. (Formicidae, Attini) seldom or never attack many of the plant species available to them in nature. In the semideciduous forests of lowland Guanacaste Province, Costa Rica, one of the tree species seldom cut is Hymenaea courbaril L. (Leguminosae, Caesalpinioideae). We...

journal_title：Oecologia

authors： Hubbell SP,Wiemer DF,Adejare A

更新日期：1983-12-01 00:00:00

abstract：:Understanding the impact of multiple stressors on ecosystems is of pronounced importance, particularly when one or more of those stressors is anthropogenic. Here we investigated the role of physical disturbance and increased nutrients on reefs dominated by the canopy-forming kelp Ecklonia radiata. We combined experime...

journal_title：Oecologia

authors： Carnell PE,Keough MJ

更新日期：2014-05-01 00:00:00

abstract：:Only heavy insects and those that fly quickly can pass through a spider's web. When an insect is entangled in a web, permanent activity is the best way of getting free. Small wings are conducive to a successful escape, as is a special surface structure of the wings (scales, hairs, lipoid surface). The autotomy of legs...

journal_title：Oecologia

authors： Nentwig W

更新日期：1982-06-01 00:00:00

abstract：:Pollen movement is often restricted in natural populations, and insufficient pollination is a potential constraint on sexual reproduction in outcrossing species. Seed-set should decrease with increased distance from the pollen source in outcrossing plants. This prediction was tested using females of the clonal, gynodi...

journal_title：Oecologia

authors： Widén B,Widén M

更新日期：1990-06-01 00:00:00

abstract：:Developmental periods are integral components of life history strategies that can have important fitness consequences and vary enormously among organisms. However, the selection pressures and mechanisms causing variation in length of developmental periods are poorly understood. Particularly puzzling are prolonged deve...

journal_title：Oecologia

authors： Palacios MG,Martin TE

更新日期：2006-01-01 00:00:00

abstract：:Plant stigmas and bee pollinators are competitors for pollen. Pollen placed on a pollinator's body can be picked up by conspecific stigmas or it can be collected by the pollinator as food. Hypothetically, one solution is for pollen to be placed on 'safe sites' on the pollinator's body, sites where the pollinator canno...

journal_title：Oecologia

authors： Tong ZY,Huang SQ

更新日期：2018-01-01 00:00:00

abstract：:Nutrient availability and herbivory can regulate primary production in ecosystems, but little is known about how, or whether, they may interact with one another. Here, we investigate how nitrogen availability and insect herbivory interact to alter aboveground and belowground plant community biomass in an old-field eco...

journal_title：Oecologia

authors： Blue JD,Souza L,Classen AT,Schweitzer JA,Sanders NJ

更新日期：2011-11-01 00:00:00

abstract：:Investigating factors which affect the decline in survival with age, i.e. actuarial senescence, is important in order to understand how demographic rates vary in wild populations. Although the evidence for the occurrence of actuarial senescence in wild populations is growing, very few studies have compared actuarial s...

journal_title：Oecologia

authors： Holand H,Kvalnes T,Gamelon M,Tufto J,Jensen H,Pärn H,Ringsby TH,Sæther BE

更新日期：2016-07-01 00:00:00

abstract：:Intraspecific positive relationships between abundance and occupancy are observed for many species, suggesting that the same processes drive local and regional species dynamics. Two main groups of mechanisms explain this relationship: spatiotemporal variation in local population growth rates due to variation in habita...

journal_title：Oecologia

authors： Östman Ö

更新日期：2011-03-01 00:00:00

abstract：:Predator-prey interactions between the predatory leech, Glossiphonia complanata, and its gastropod prey were investigated in laboratory experiments, including behavioural observations with the aid of time-lapse video technique. Six gastropod species were investigated, viz. Lymnaea peregra, Planorbis planorbis, Physa f...

journal_title：Oecologia

authors： Brönmark C,Malmqvist B

更新日期：1986-05-01 00:00:00

abstract：:Gene frequencies at nine polymorphic enzyme loci were followed in 22 cage populations of D. melanogaster all founded from the same stock but subsequently maintained in different environments. The three factors distinguishing the different environments were temperature and the alcohol and yeast in the medium and for ea...

journal_title：Oecologia

authors： Oakeshott JG

更新日期：1979-12-01 00:00:00

abstract：:Water and nitrogen (N) interact to influence soil N cycling and plant N acquisition. We studied indices of soil N availability and acquisition by woody plant taxa with distinct nutritional specialisations along a north Australian rainfall gradient from monsoonal savanna (1,600-1,300 mm annual rainfall) to semi-arid wo...

journal_title：Oecologia

authors： Soper FM,Richards AE,Siddique I,Aidar MP,Cook GD,Hutley LB,Robinson N,Schmidt S

更新日期：2015-05-01 00:00:00

abstract：:Tropical ferns are characterized by a high diversity of plant life forms, yet there have been few large-scale studies on the functional ecology of these different forms. We examined epiphytic, hemiepiphytic, and terrestrial ferns, and asked whether there are differences in the mineral nutrition and water relations acr...

journal_title：Oecologia

authors： Watkins JE Jr,Rundel PW,Cardelús CL

更新日期：2007-08-01 00:00:00

abstract：:Soil properties of pioneer Pinus flexilis stands with similar topography and climate were investigated. Soils supporting this tree in association with Cercocarpus ledifolius were found to have higher percentages of total nitrogen than soils beneath similar stands lacking Cercocarpus.An excavated Cercocarpus ledifolius...

journal_title：Oecologia

authors： Lepper MG,Fleschner M

更新日期：1977-12-01 00:00:00