The distribution of C4 species of the Cyperaceae in North America in relation to climate.

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...

journal_title：Oecologia

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

abstract：:Large-bodied zooplankton of the genus Daphnia are thought to be keystone species in freshwater pelagic habitats, potentially able to exert strong grazing effects and enhance phosphorus limitation of algae. I examined the degree to which Daphnia pulex differ from small-bodied zooplankton in their effects on algal bioma...

journal_title：Oecologia

authors： Steiner CF

更新日期：2002-05-01 00:00:00

abstract：:Measurements were made of the photosynthetic gas exchange properties and water use efficiency of 19 species of mangrove in 9 estuaries with different salinity and climatic regimes in north eastern Australia and Papua New Guinea. Stomatal conductance and CO2 assimilation rates differed significantly between species at ...

journal_title：Oecologia

authors： Clough BF,Sim RG

更新日期：1989-04-01 00:00:00

abstract：:Current theory predicts that in low-density, seed-limited plant populations, seed predation will be more important than competition in determining the number of individuals that reach maturity. However, when plant density is high, competition for microsites suitable for establishment and growth is expected to have a r...

journal_title：Oecologia

authors： Sousa WP,Quek SP,Mitchell BJ

更新日期：2003-11-01 00:00:00

abstract：:Hemiparasitic plants tend to thrive in and significantly affect plant communities in low-nutrient, high-light environments. Hemiparasites are assumed to be weak competitors for light but strong parasites, leading to the prediction that effects on hosts and communities should be a function of resource supply. We invest...

journal_title：Oecologia

authors： Borowicz VA,Armstrong JE

更新日期：2012-07-01 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：:Bromus tectorum L. dominates sites of large-scale disturbance, while Poa pratensis L. dominates the sites of small-scale disturbance in the Festuca/Symphoricarpos habitat type in eastern Washington (USA). The role of incident irradiation in influencing these distributions was examined using field and glasshouse experi...

journal_title：Oecologia

authors： Bookman PA,Mack RN

更新日期：1983-03-01 00:00:00

abstract：:Hydrologic regime is an important control of primary production in wetland ecosystems. I investigated the coupling of flooding, soil salinity and plant production in northern prairie marshes that experience shallow spring flooding. Field experiments compared whitetop (Scolochloa festucacea) marsh that was: (1) nonfloo...

journal_title：Oecologia

authors： Neill C

更新日期：1993-10-01 00:00:00

abstract：:When testing census data of insect populations for regulation, and/or for overall density dependence in the course of numbers over years, certain conditions, which follow from the testing models, should be fulfilled. Even if the series of densities may be considered a piece of first-order Markov chain (a necessary con...

journal_title：Oecologia

authors： Den Boer PJ

更新日期：1990-05-01 00:00:00

abstract：:Genotype frequencies of adult and juvenile Actinia tenebrosa from 2 populations showed that settlement and recruitment predominantly involved the localised asexual (ameiotic) proliferation of established genotypes. However, there is strong indirect evidence that the genotypic variation was generated by sexual reproduc...

journal_title：Oecologia

authors： Ayre DJ

更新日期：1983-03-01 00:00:00

abstract：:Interspecific competition is assumed to have a strong influence on the population dynamics of competing species, but is not easily demonstrated for mobile species in the wild. In the Florida Keys (USA), anecdotal observations have long pointed to an inverse relationship in abundance of two large decapod crustaceans fo...

journal_title：Oecologia

authors： Behringer DC,Hart JE

更新日期：2017-05-01 00:00:00

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...

journal_title：Oecologia

authors： Brunt C,Read J,Sanson GD

更新日期：2006-07-01 00:00:00

abstract：:A number of feeding cues determine the palatability of detritus to detritivorous invertebrates. In salt marsh detritus the feeding cues include flavor provided by phenolics such as ferulic acid, pH, salinity, and nitrogen content. We examined the feeding responses to each cue by using experimental manipulations where ...

journal_title：Oecologia

authors： Valiela I,Rietsma CS

更新日期：1984-08-01 00:00:00

abstract：:The response of an Australian arid-zone gecko community to sulphur dioxide and salt spray from a mine and industrial site was investigated from 1992 to 1995. Geckos were abundant and fecund at control sites in chenopod shrubland and annual capture rates were strongly influenced by minimum night temperatures. Capture r...

journal_title：Oecologia

authors： Read JL

更新日期：1998-04-01 00:00:00

abstract：:Differential predation pressure and the probability of predation on a Batesian mimicry complex and on alternative prey were estimatedin a field experiment. The mimicry complex was composed of a noxious model (Eleodes obscura (Say)) and a palatable mimic (Stenomorpha marginata (LeConte)). House crickets (Acheta domesti...

journal_title：Oecologia

authors： Hetz M,Slobodchikoff CN

更新日期：1988-09-01 00:00:00

abstract：:Terpenoid emissions from ponderosa pine (Pinus ponderosa subsp. scopulorum) were measured in Colorado, USA over two growing seasons to evaluate the role of incident light, needle temperature, and stomatal conductance in controlling emissions of 2-methyl-3-buten-2-ol (MBO) and several monoterpenes. MBO was the dominant...

journal_title：Oecologia

authors： Harley P,Eller A,Guenther A,Monson RK

更新日期：2014-09-01 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：:Physiological responses to elevated CO2 at the leaf and canopy-level were studied in an intact pine (Pinus taeda) forest ecosystem exposed to elevated CO2 using a free-air CO2 enrichment (FACE) technique. Normalized canopy water-use of trees exposed to elevated CO2 over an 8-day exposure period was similar to that of ...

journal_title：Oecologia

authors： Ellsworth DS,Oren R,Huang C,Phillips N,Hendrey GR

更新日期：1995-10-01 00:00:00

abstract：:The period between oviposition and the start of hatching varied from about 17 weeks at 3°C to about 1 week at 22°C, and the length of the hatching period varied from about 34 days at 3°C to about 3 days at 22°C. Regression equations are provided to estimate the lengths of both periods at all temperatures between 3°C a...

journal_title：Oecologia

authors： Elliott JM

更新日期：1972-03-01 00:00:00

abstract：:We analysed the spatial and temporal pattern of egg laying in great spotted cuckoo females using microsatellite typing to determine parentage of the eggs and nestlings found in host (magpie) nests. The results showed that there were no exclusive laying territories in the study area. Cases of multiparasitism could be d...

journal_title：Oecologia

authors： Martínez JG,Soler JJ,Soler M,Burke T

更新日期：1998-11-01 00:00:00

abstract：:Canopy structure and tree species diversity, shaped by succession, disturbance, and community composition, are linked to numerous ecosystem functions, including net primary production (NPP). Understanding of how ecosystem structural metrics are interrelated and mechanistically link to NPP, however, is incomplete. We c...

journal_title：Oecologia

authors： Scheuermann CM,Nave LE,Fahey RT,Nadelhoffer KJ,Gough CM

更新日期：2018-10-01 00:00:00

abstract：:In this paper, we test the mid-domain hypothesis as an explanation for observed patterns of flowering diversity in two sub-alpine communities of insect-pollinated plants. Observed species richness patterns showed an early-season increase in richness, a mid-season peak, and a late-season decrease. We show that a "mid-d...

journal_title：Oecologia

authors： Morales MA,Dodge GJ,Inouye DW

更新日期：2005-01-01 00:00:00

abstract：:Six estimates of resource allocation to sexual reproduction (nectar concentration, nectar volume, sugar production, pollinator visitation rates, fruit-set, and seed production) and a single estimate of resource allocation to asexual reproduction (the rate of rooted-branch production) were examined for five species of ...

journal_title：Oecologia

authors： Sutherland S,Vickery RK Jr

更新日期：1988-08-01 00:00:00

abstract：:Few studies have evaluated elevated CO2 responses of trees in variable light despite its prevalence in forest understories and its potential importance for sapling survival. We studied two shade-tolerant species (Acer rubrum, Cornus florida) and two shade-intolerant species (Liquidambar styraciflua, Liriodendron tulip...

journal_title：Oecologia

authors： Naumburg E,Ellsworth DS

更新日期：2000-02-01 00:00:00

abstract：:Ant metapleural glands secrete surface antibiotics that affect pollen as well as bacteria and fungi. This may be one reason why ant pollination is rare. It is predicted that pollination by ants is possible only in the presence of certain ant and/or plant traits. Two traits are investigated; first, absence of the metap...

journal_title：Oecologia

authors： Peakall R,Angus CJ,Beattie AJ

更新日期：1990-10-01 00:00:00

abstract：:Compared to terrestrial environments, grazing intensity on belowground plant parts may be particularly strong in aquatic environments, which may have great effects on plant-community structure. We observed that the submerged macrophyte, Potamogeton pectinatus, which mainly reproduces with tubers, often grows at interm...

journal_title：Oecologia

authors： Sandsten H,Klaassen M

更新日期：2008-06-01 00:00:00

abstract：:Biodiverse environments provide a variety of resources that can be exploited by consumers. While many studies revealed a positive correlation between biodiversity and consumer biomass and richness, only few studies have investigated how resource diversity affects single consumers. To better understand whether a single...

journal_title：Oecologia

authors： Drescher N,Wallace HM,Katouli M,Massaro CF,Leonhardt SD

更新日期：2014-12-01 00:00:00

abstract：:Competition for space is an important process on tropical coral reefs. Few studies have examined the role sponges play in community structure despite the fact that many sponges are competitively superior to reef-building corals in space acquisition. Surveys conducted throughout the Florida Keys indicated that Chondril...

journal_title：Oecologia

authors： Hill MS

更新日期：1998-11-01 00:00:00

abstract：:The impacts of ungulates on small mammals in an East African savanna habitat were investigated by monitoring the population and community responses of small mammals on replicated 4-ha plots from which ungulates had been excluded. The dominant small mammal in this habitat is the pouched mouse, Saccostomusmearnsi, a med...

journal_title：Oecologia

authors： Keesing F

更新日期：1998-09-01 00:00:00

abstract：:Leaf water relationships were studied in four widespread forest tree species (Ilex opaca Ait., Cornus florida L., Acer rubrum L., and Liriodendron tulipifera L.). The individuals studied all occurred on the same site and were selected to represent a range of growth forms and water relationships in some of the principa...

journal_title：Oecologia

authors： Roberts SW,Strain BR,Knoerr KR

更新日期：1980-09-01 00:00:00