Interpretation of global differences in plant calorific values : The significance of desert and arid woodland vegetation.

abstract：:The random-mixing assumptions of many parasite-transmission models are challenged if healthy individuals can alter their behaviour to reduce their risk of infection. Some pathogens reduce the attractiveness of their hosts' excretions, for example, potentially altering contact rates and thus the predicted force of infe...

journal_title：Oecologia

authors： Hughes NK,Helsen S,Tersago K,Leirs H

更新日期：2014-12-01 00:00:00

abstract：:Senecio vulgaris from ruderal habitats may colonise crop fields and persist in the new environment. Persistence may occur through phenotypic plasticity or genetic differentiation. In the presence of genetic variation, differential responses of life history traits to selection may lead to local adaptation. A reciprocal...

journal_title：Oecologia

authors： Leiss KA,Müller-Schärer H

更新日期：2001-07-01 00:00:00

abstract：:This study investigates the demography and interspecific interactions of 6 Heterohyrax brucei and 4 Procavia johnstoni populations, which inhabited 6 kopjes (rock outcrops) in the Serengeti National Park, Tanzania over a period of 17 years. On three kopjes (H1, O2 and PH2) both species lived sympatrically, while on th...

journal_title：Oecologia

authors： Hoeck HN

更新日期：1989-05-01 00:00:00

abstract：:Plant roots transfer water between soil layers of different water potential thereby significantly affecting the distribution and availability of water in the soil profile. We used a modification of the heat pulse method to measure sap flow in roots of Grevillea robusta and Eucalyptus camaldulensis and demonstrated a r...

journal_title：Oecologia

authors： Burgess SS,Adams MA,Turner NC,Ong CK

更新日期：1998-07-01 00:00:00

abstract：:During summer, 1971, a massive outbreak of red tide resulted in defaunation of a previously characterized sandy, intertidal habitat in upper Old Tampa Bay, Tampa, Florida. Repopulation of the polychaete fauna was studied from August, 1971, to July, 1973. A transect composed of 4 stations running from just below mean h...

journal_title：Oecologia

authors： Dauer DM,Simon JL

更新日期：1976-06-01 00:00:00

abstract：:Many animals have seasonally plastic diets to take advantage of seasonally abundant plant resources, such as fruit or nectar. Switches from insectivorous diets that are protein rich to fruits or nectar that are carbohydrate rich present physiological challenges, but are routinely done by insectivorous songbirds during...

journal_title：Oecologia

authors： Frick WF,Shipley JR,Kelly JF,Heady PA 3rd,Kay KM

更新日期：2014-01-01 00:00:00

abstract：:We performed a food provisioning experiment in a population of Pied Flycatchers Ficedula hypoleuca breeding at high altitude in central Spain to test if food availability before and during laying determines clutch size. Food was provided to one of two pairs with the same date of initiation of nest-building (15 dyads o...

journal_title：Oecologia

authors： Sanz JJ,Moreno J

更新日期：1995-08-01 00:00:00

abstract：:For some animals, the habitat which they first experience can influence the type of habitat which they select later in life and, thus, potentially their population distribution and dynamics. However, for many insect herbivores, whose natal habitat may consist of a single hostplant, the consequences of natal hostplant ...

journal_title：Oecologia

authors： Merwin AC,Inouye BD,Underwood N

更新日期：2020-06-01 00:00:00

abstract：:Feeding behavior in B. calyciflorus was observed in both constrained and unconfined individuals. There are at least three mechanisms by which the ingestion of suspended particles may be regulated. First, the cirri of the pseudotrochus may be extended, allowing particles to enter the funnel-shaped buccal field, or they...

journal_title：Oecologia

authors： Gilbert JJ,Starkweather PL

更新日期：1977-06-01 00:00:00

abstract：:Spontaneous bleeding of sugar-rich sap from cambial-deep incisions in the bark of trunks was demonstrated for Eucalyptus globulus and other eucalypts across a range of localities and seasonal conditions in south-west Australia. High levels of sucrose and raffinose (up to 31% w/v total sugars) were present in the exuda...

journal_title：Oecologia

authors： Pate J,Shedley E,Arthur D,Adams M

更新日期：1998-12-01 00:00:00

abstract：:Nitrogen (N) deposition and climate are acknowledged drivers of change in biodiversity and ecosystem function at large scales. However, at a local scale, their impact on functions and community structure of organisms is filtered by drivers like habitat quality and food quality/availability. This study assesses the rel...

journal_title：Oecologia

authors： Mitchell RJ,Urpeth HM,Britton AJ,Black H,Taylor AR

更新日期：2016-11-01 00:00:00

abstract：:A factorial design of clipping and compaction was used to study the responses of Schizachyrium scoparium and its mycorrhizal symbionts to these stresses. All treatment combinations significantly reduced the growth and biomass of plants relative to controls. Compaction significantly reduced tillering and crown expansio...

journal_title：Oecologia

authors： Wallace LL

更新日期：1987-06-01 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：:The photosynthetic pathways of 42 species of the genusEuphorbia growing wild, naturalized or cultivated in Egypt were investigated. The criteria used included the δ13C- and δD-values and Kranz anatomy of the leaves. There is a relationship between the photosynthetic pathway and the ecological conditions in the habitat...

journal_title：Oecologia

authors： Batanouny KH,Stichler W,Ziegler H

更新日期：1991-09-01 00:00:00

abstract：:Global climate change is expected to affect terrestrial ecosystems in a variety of ways. Some of the more well-studied effects include the biogeochemical feedbacks to the climate system that can either increase or decrease the atmospheric load of greenhouse gases such as carbon dioxide and nitrous oxide. Less well-stu...

journal_title：Oecologia

authors： Butler SM,Melillo JM,Johnson JE,Mohan J,Steudler PA,Lux H,Burrows E,Smith RM,Vario CL,Scott L,Hill TD,Aponte N,Bowles F

更新日期：2012-03-01 00:00:00

abstract：:Plants of Diplacus aurantiacus, a successional shrub common in California chaparral, were grown under controlled conditions in which either quantum flux density or nitrogen availability was varied. Photosynthesis and leaf nitrogen content were determined on a leaf area and a leaf weight basis, and whole plant growth w...

journal_title：Oecologia

authors： Gulmon SL,Chu CC

更新日期：1981-05-01 00:00:00

abstract：:Fourteen genotypes (varieties) of soybean (Glycine max) were screened for levels of induced resistance to Mexican bean beetle (Epilachna varivestis) damage, and a subset of 6 of those varieties was screened for levels of constitutive resistance to Mexican bean beetles. Experiments were carried out in the greenhouse, w...

journal_title：Oecologia

authors： Underwood N,Morris W,Gross K,Lockwood Iii JR

更新日期：2000-01-01 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：:It is important to understand the role that different predators can have to be able to predict how changes in the predator assemblage may affect the prey community and ecosystem attributes. We tested the effects of different stream predators on macroinvertebrates and ecosystem attributes, in terms of benthic algal bio...

journal_title：Oecologia

authors： Nilsson E,Olsson K,Persson A,Nyström P,Svensson G,Nilsson U

更新日期：2008-10-01 00:00:00

abstract：:Evidence was given that the freezing tolerance of Halimione portulacoides, a wintergreen halophyte, can be explained by protection of sensitive cellular membranes in vivo. Experiments were done with cloned cuttings of a plant from the German North Sea coast. One series received no NaCl (O-plants) the other 3% NaCl (Na...

journal_title：Oecologia

authors： Maier M,Kappen L

更新日期：1979-01-01 00:00:00

abstract：:No definitive explanation for the form of the relationship between species diversity and ecosystem productivity exists nor is there agreement on the mechanisms linking diversity and productivity across scales. Here, we examine changes in the form of the diversity-productivity relationship within and across the plant c...

journal_title：Oecologia

authors： Jennings MD,Williams JW,Stromberg MR

更新日期：2005-05-01 00:00:00

abstract：:Field experiments were conducted to clarify the relationship between the extent of food limitation and the amount and nature of intraspecific competition in an orb weaver, the labyrinth spider Metepeira labyrinthea. In one experiment agonistic encounters between marked adult females were induced at natural web sites. ...

journal_title：Oecologia

authors： Wise DH

更新日期：1983-04-01 00:00:00

abstract：:Using data from three fires in northeastern Spain, we tested a condition necessary to support the idea that fire has been a factor in the evolution of the resprouting habit: populations of all resprouting species within a community should show high levels of genet survival after fires and show a low coefficient of var...

journal_title：Oecologia

authors： López-Soria L,Castell C

更新日期：1992-10-01 00:00:00

abstract：:Long-termed fumigation of pea seedlings with SO2 caused typical alterations of the concentration of free glutamate and glutamine as well as fluctuations of the activity of glutamate dehydrogenase and glutamine synthetase. Shortly after the beginning of the fumigation with low concentrations of SO2 (up to 0,3 ppm) the ...

journal_title：Oecologia

authors： Jäger HJ,Pahlich E

更新日期：1972-06-01 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：:Anthropogenic disturbance can have important indirect effects on ecosystems by disrupting species interactions. Here we examine the effects of anthropogenic disturbance on distance dispersal by ants for the diaspores of myrmecochorous Euphorbiaceae in Brazilian Caatinga. Rates of diaspore removal and distances removed...

journal_title：Oecologia

authors： Leal LC,Andersen AN,Leal IR

更新日期：2014-01-01 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：:Studies of population dynamics of long-lived species have generally focused on adult survival because population growth should be most sensitive to this parameter. However, actual variations in population size can often be driven by other demographic parameters, such as juvenile survival, when they show high temporal ...

journal_title：Oecologia

authors： Souchay G,Gauthier G,Pradel R

更新日期：2013-09-01 00:00:00

abstract：:Hydrogen isotope (δ2H) analysis has been routinely used as an ecological tracer for animal movement and migration, yet a biochemical understanding of how animals incorporate this element in the synthesis of tissues is poorly resolved. Here, we apply a new analytical tool, amino acid (AA) δ2H analysis, in a controlled ...

journal_title：Oecologia

authors： Newsome SD,Nakamoto BJ,Curras MR,Fogel ML

更新日期：2020-08-01 00:00:00

abstract：:This study examines the effect of different densities and the removal of all neighbours at different stages of development on all components of reproduction in the inbreeding annual Thlaspi arvense L. A 64-fold increase in density significantly reduced all repooductive components. The number of flower buds per plant w...

journal_title：Oecologia

authors： Matthies D

更新日期：1990-05-01 00:00:00