Differences in AM fungal root colonization between populations of perennial Aster species have genetic reasons.

abstract：:A chemostat study was conducted to investigate the influence of water quality parameters related to acidification processes on the decomposition of floating leaves of Nymphaea alba L. HCO inf3sup- and total Al concentration and pH influenced the decay rate. The activity of four cell-wall decaying exoenzymes was measur...

journal_title：Oecologia

authors： Kok CJ,Van der Velde G

更新日期：1991-11-01 00:00:00

abstract：:Four colonies of the desert leaf-cutter ant Acromyrmex versicolor versicolor (Pergande) located 30 miles N.E. of Tempe, Arizona were observed over a 7 month period. The ants utilized trails in foraging, a characteristic of higher attines, as well as foraging singly, a typical pattern among the more primitive gardeners...

journal_title：Oecologia

authors： Gamboa GJ

更新日期：1975-03-01 00:00:00

abstract：:Twenty nine harpacticoid copepods are new to Bermuda and significant changes are noted in the distribution records of several species. Six temporary groups are organized to separate the copepods on their apparent zoogeographical ranges: (1) cosmopolitan, (2) warm temperate-tropical, (3) North Atlantic, (4) North Atlan...

journal_title：Oecologia

authors： Coull BC,Herman SS

更新日期：1970-12-01 00:00:00

abstract：:Standard infra-red gas analysis techniques were used to compare the photosynthesis of the liverworts Marchantia foliacea Mitt. and Monoclea forsteri Hook. Parameters measured include net photosynthetic rates, light response curves, quantum efficiencies, diffusive resistances to CO2 and water, apparent photorespiration...

journal_title：Oecologia

authors： Green TG,Snelgar WP

更新日期：1982-08-01 00:00:00

abstract：:In a North Carolina population of Diamorpha smallii, densities were artificially manipulated by thinning stands to predetermined densities. Individuals in areas of high density produce fewer seeds than individuals at low density in the same habitat. Three components of fecundity, the number of flowers per plant, the n...

journal_title：Oecologia

authors： Clay K,Shaw R

更新日期：1981-10-01 00:00:00

abstract：:Emergence and survival of honey mesquite (Prosopis glandulosa var.glandulosa Torr.) seedlings was quantified on sites with contrasting grazing histories: long-term continuous grazing (LTG) and long-term protection (LTP) from grazing by cattle. On each site, different levels of heroaceous defoliation were imposed at mo...

journal_title：Oecologia

authors： Brown JR,Archer S

更新日期：1989-03-01 00:00:00

abstract：:Animals were acclimitized to a daily cycle of 15-25°C and a photoperiod of LD 12:12. Parietalectomized animals in an experimental thermal gradient (15°C-40°C, LD 12:12) selected significantly higher temperatures than controls at all hours of the day except from 0800-1200. These results suggest that the lizard parapine...

journal_title：Oecologia

authors： Hutchison VH,Kosh RJ

更新日期：1974-06-01 00:00:00

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...

journal_title：Oecologia

authors： Beckerman AP,Wieski K,Baird DJ

更新日期：2007-05-01 00:00:00

abstract：:Shorter male larval and pupal durations were sufficient to produce the protandrous emergence pattern of the black swallowtail butterfly. In 9 broods observed under natural conditions, the first male was seen 7.1±6.5 days before the first female, although the peak of captures relative to the first capture was similar i...

journal_title：Oecologia

authors： Lederhouse RC,Finke MD,Scriber JM

更新日期：1982-06-01 00:00:00

abstract：:Enhanced ultraviolet-B (UV-B) radiation may have multiple effects on both plants and animals and affect plant-herbivore interactions directly and indirectly by inducing changes in host plant quality. In this study, we examined combined effects of UV-B and herbivory on the defence of the mountain birch (Betula pubescen...

journal_title：Oecologia

authors： Anttila U,Julkunen-Tiitto R,Rousi M,Yang S,Rantala MJ,Ruuhola T

更新日期：2010-09-01 00:00:00

abstract：:Differences in the density of conspecific tree individuals in response to environmental gradients are well documented for many tree species, but how such density differences are generated and maintained is poorly understood. We examined the segregation of six dipterocarp species among three soil types in the Pasoh tro...

journal_title：Oecologia

authors： Yamada T,Yamada Y,Okuda T,Fletcher C

更新日期：2013-07-01 00:00:00

abstract：:Analysis of the branch area/stem area ratio of Scots pine growing in different climatic conditions in Europe and Siberia indicates that the branch area supported by a stem increases in warmer and drier conditions. The ratio was significantly correlated with several climatic variables, especially with potential evapotr...

journal_title：Oecologia

authors： Berninger F,Nikinmaa E,Hari P,Mencuccini M,Grace J

更新日期：1995-05-01 00:00:00

abstract：:The host specificity of insect parasitoids and herbivores is thought to be shaped by a suite of traits that mediate host acceptance and host suitability. We conducted laboratory experiments to identify mechanisms shaping the host specificity of the aphid parasitoid Binodoxys communis. Twenty species of aphids were exp...

journal_title：Oecologia

authors： Desneux N,Barta RJ,Hoelmer KA,Hopper KR,Heimpel GE

更新日期：2009-05-01 00:00:00

abstract：:The photosynthetic incorporation of H14CO3- by the alga Platymonas subcordiformis decreased with increasing concentrations of NaCl in the medium. There was no correlation between the response of P. subcordiformis to salinity in high or low NaCl-concentrations in the growing solution. When other osmotic substances were...

journal_title：Oecologia

authors： Kirst GO

更新日期：1975-09-01 00:00:00

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 ...

journal_title：Oecologia

authors： Caruso NM,Staudhammer CL,Rissler LJ

更新日期：2020-08-01 00:00:00

abstract：:There is considerable theoretical evidence that a trade-off between competitive and colonization ability enables species coexistence. However, empirical studies testing for the presence of a competition-colonization (CC) trade-off and its importance for species coexistence have found mixed results. In a microcosm expe...

journal_title：Oecologia

authors： Limberger R,Wickham SA

更新日期：2011-11-01 00:00:00

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...

journal_title：Oecologia

authors： Korfel CA,Chamberlain JD,Gifford ME

更新日期：2015-10-01 00:00:00

abstract：:The seasonal and long-term population dynamics of helminths parasitizing voles suggested that density-dependent factors might be important in the population dynamics of common species, whereas density-independent factors predominate in the regulation of the rare species. To test this, we used single and multiple regre...

journal_title：Oecologia

authors： Haukisalmi V,Henttonen H

更新日期：1990-06-01 00:00:00

abstract：:Most theoretical models for the evolution of temperature-dependent sex determination (TSD) rely upon differential fitness of male and female offspring incubated under different thermal regimes. However, there are few convincing data on this topic. We studied incubation effects in a lizard species (Bassiana duperreyi, ...

journal_title：Oecologia

authors： Elphick MJ,Shine R

更新日期：1999-03-01 00:00:00

abstract：:Seven North American moss species responded differentially to fumigations with sulfur dioxide ranging from 0.5 to 4.0 ppm. Leucobryum glaucum and Dicranum scoparium were the most sensitive species; Dicranella heterophylla, Polytrichum ohioense and Pottia truncata, the most resistant. The results of fumigations with 0....

journal_title：Oecologia

authors： Nash TH 3rd,Nash EH

更新日期：1974-09-01 00:00:00

abstract：:Disturbance is now recognized as a key ecosystem process but few studies have examined its indirect effects on individuals in a population or its relationship to ecological dominance in a community. Using an ecologically dominant small mammal population in experimentally burned habitat as a model, I empirically tested...

journal_title：Oecologia

authors： Plavsic MJ

更新日期：2011-08-01 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

abstract：:The CO2 assimilation of primary foliage of red maple (Acer rubrum L.) and red oak (Quercus rubra L.), and of regrowth foliage produced in response to simulated insect defoliation, was measured throughout the season by infrared gas analysis: parallel measurements of leaf conductance were obtained by ventilated diffusio...

journal_title：Oecologia

authors： Heichel GH,Turner NC

更新日期：1983-03-01 00:00:00

abstract：:Functional diversity has been identified as a key to understanding ecosystem and community functioning. However, due to the lack of a sound definition its nature and measurement are still poorly understood. In the same way that species diversity can be split into species richness and species evenness, so functional di...

journal_title：Oecologia

authors： Mouillot D,Mason WH,Dumay O,Wilson JB

更新日期：2005-01-01 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：:More than 500 species of the Poaceae are found in Kenya, East Africa. Eighteen of twenty-seven tribes are exclusively (except the Paniceae and Danthonieae) of the C3 photosynthetic type. A floristic analysis of low altitude grasslands suggests that nearly all species at these low altitudes are of the C4 photosynthetic...

journal_title：Oecologia

authors： Tieszen LL,Senyimba MM,Imbamba SK,Troughton JH

更新日期：1979-01-01 00:00:00

abstract：:Deuterium isotope analyses have revolutionized the study of migratory connectivity because global gradients of deuterium in precipitation (deltaD(P)) are expressed on a continental scale. Several authors have constructed continental scale base maps of deltaD(P) to provide a spatial reference for studying the movement ...

journal_title：Oecologia

authors： Farmer A,Cade BS,Torres-Dowdall J

更新日期：2008-11-01 00:00:00

abstract：:Hybridization has been proposed as a mechanism by which exotic plants can increase their invasiveness. By generating novel recombinants, hybridization may result in phenotypes that are better adapted to the new environment than their parental species. We experimentally assessed the resistance of five exotic Fallopia t...

journal_title：Oecologia

authors： Krebs C,Gerber E,Matthies D,Schaffner U

更新日期：2011-12-01 00:00:00

abstract：:We investigated seasonality of gender differences in the patterns of flea infestation in nine rodent species to test if sex-biased parasitism in terms of mean abundance, species richness, prevalence and the level of aggregation (a) varies among hosts and between seasons, and (b) is linked to sexual size dimorphism. Se...

journal_title：Oecologia

authors： Krasnov BR,Morand S,Hawlena H,Khokhlova IS,Shenbrot GI

更新日期：2005-12-01 00:00:00

abstract：:Some plant secondary compounds, such as terpenes, are very flammable; however, their role in enhancing plant flammability is poorly understood and often neglected in reviews on plant chemical ecology. This is relevant as there is growing evidence that flammability-enhancing traits are adaptive in fire-prone ecosystems...

journal_title：Oecologia

authors： Pausas JG,Alessio GA,Moreira B,Segarra-Moragues JG

更新日期：2016-01-01 00:00:00