Ant behaviour and seed morphology: a missing link of myrmecochory.

abstract：:Global climate models forecast an increase in the frequency and intensity of extreme weather events, including severe droughts. Based on multi-year relationships between precipitation amount and aboveground annual net primary production (ANPP), semi-arid grasslands are projected to be among the most sensitive ecosyste...

journal_title：Oecologia

authors： Cherwin K,Knapp A

更新日期：2012-07-01 00:00:00

abstract：:Perennial species have evolved several strategies to survive fire, with resprouters and seeders forming two major categories. Gompholobium marginatum is a herbaceous seeder legume occurring in the Western Australian jarrah (Eucalyptus marginata) forest which since 1961 has been subjected to burns every sixth year. Suc...

journal_title：Oecologia

authors： Hansen A,Pate JS,Hansen AP

更新日期：1992-05-01 00:00:00

abstract：:In order to test the role of disturbance and the effects of disturbance frequency on stream communities, an experiment was conducted in New Hope Creek, North Carolina, USA. Patches of cobbles were tumbled 0, 1 or 2 times in a 6 week span. These tumbling disturbances lasted only 30 seconds. The recovery of the macroinv...

journal_title：Oecologia

authors： Reice SR

更新日期：1985-08-01 00:00:00

abstract：:A trade-off between antimicrobial defences and palatability to dispersers may place limits on fruit persistence in nature. The retention times of ripe fruits on 34 wild plant species under natural conditions (unbagged persistence) and when fruits had been bagged with nylon mesh to exclude frugivores (bagged persistenc...

journal_title：Oecologia

authors： Tang AM,Corlett RT,Hyde KD

更新日期：2005-01-01 00:00:00

abstract：:Thirty-four species of marine macroalgae from around St. Andrews, Scotland, have been assayed for their external activity and thirty-three species for their total activity of carbonic anhydrase. Activity was detected in all the Rhodophyta tested apart from Chondrus crispus, but was absent in Codium fragile, Enteromorp...

journal_title：Oecologia

authors： Giordano M,Maberly SC

更新日期：1989-12-01 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：:Locomotory efficiency and potential has been studied in three species of the waterboatman Notonecta in relation to the predation strategies of these bugs.Morphometric analysis, estimating likely relative drag forces, mechanical advantages of the swimming legs and leg length/body length ratios allowed an estimation of ...

journal_title：Oecologia

authors： Giller PS

更新日期：1982-02-01 00:00:00

abstract：:A technique is presented in which desiccation as a source of error in fresh weight determinations of soft-bodied microfauna is avoided by weighing the animal in a drop of silica fluid. ...

journal_title：Oecologia

authors： Lundkvist H

更新日期：1978-01-01 00:00:00

abstract：:Resource competition is commonly invoked to explain negative effects of invasive plants on native plant abundance. If invasives out-compete natives, global changes that elevate resource availability may interact with invasives to exacerbate impacts on native communities. Indeed, evidence is accumulating that elevated ...

journal_title：Oecologia

authors： Bradford MA,Schumacher HB,Catovsky S,Eggers T,Newingtion JE,Tordoff GM

更新日期：2007-07-01 00:00:00

abstract：:Natural abundance of (15)N and [N] was studied in thalli of mat-forming lichens collected from tundra and heathland sites in the northern and southern hemispheres. The study includes samples of British Cladonia portentosa from sites in regions of high and low N-loading and in heathland growing both directly on peat an...

journal_title：Oecologia

authors： Ellis CJ,Crittenden PD,Scrimgeour CM,Ashcroft C

更新日期：2003-06-01 00:00:00

abstract：:The effects of fertilization on leaf longevity and leaf mortality in the Alaskan evergreen shrub, Ledum palustre (Ait.) Hult., were investigated in a field experiment. The fertilization treatments included N alone, P alone, N plus P, and N plus P plus K. After 5 years all treatments had the same effect on leaf longevi...

journal_title：Oecologia

authors： Shaver GR

更新日期：1983-02-01 00:00:00

abstract：:Contamination in marine foodwebs is nowadays of great environmental concern owing to the increasing levels of pollution in marine ecosystems from different anthropogenic sources. Seabirds can be used as indicators of regional contaminant patterns across large temporal and spatial scales. We analysed Hg, Se and Pb leve...

journal_title：Oecologia

authors： Ramos R,González-Solís J,Forero MG,Moreno R,Gómez-Díaz E,Ruiz X,Hobson KA

更新日期：2009-03-01 00:00:00

abstract：:The frequency of extreme warm years is increasing across the majority of the planet. Shifts in plant phenology in response to extreme years can influence plant survival, productivity, and synchrony with pollinators/herbivores. Despite extensive work on plant phenological responses to climate change, little is known ab...

journal_title：Oecologia

authors： Carter JM,Orive ME,Gerhart LM,Stern JH,Marchin RM,Nagel J,Ward JK

更新日期：2017-04-01 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：:Recent investigations into the nutrient cycling of coastal ecosystems have suggested that migratory or anadromous fish could be important vectors of marine nutrients. Anadromous fish have assimilated marine nutrients that would contribute to the nutrient budgets of freshwater systems by excretion, gamete release, or t...

journal_title：Oecologia

authors： MacAvoy SE,Macko SA,McIninch SP,Garman GC

更新日期：2000-03-01 00:00:00

abstract：:The impacts of disturbance on biodiversity and distributions have been studied in many systems. Yet, comparatively less is known about how lichens-obligate symbiotic organisms-respond to disturbance. Successful establishment and development of lichens require a minimum of two compatible yet usually unrelated species t...

journal_title：Oecologia

authors： Tripp EA,Lendemer JC,McCain CM

更新日期：2019-06-01 00:00:00

abstract：:At constant cladode temperature the stomatal resistance of O. inermis increased when the cladode-air vapor pressure difference was increased and stomatal resistance decreased when the cladode-air vapor pressure difference was lowered. Net CO2 fixation in the dark was very responsive to these humidity dependent changes...

journal_title：Oecologia

authors： Osmond CB,Ludlow MM,Davis R,Cowan IR,Powles SB,Winter K

更新日期：1979-07-01 00:00:00

abstract：:The spatial context in which seed predation occurs may modify the spatial structure of recruitment generated by seed dispersal. The Janzen-Connell (J-C) model predicts that granivores will exert greater pressure on the parent plant or at those sites where the density of dispersed seeds is higher. We have investigated ...

journal_title：Oecologia

authors： Blendinger PG,Díaz-Vélez MC

更新日期：2010-06-01 00:00:00

abstract：:The prey naiveté hypothesis suggests that native prey may be vulnerable to introduced predators because they have not evolved appropriate defenses. However, recent evidence suggests that native prey sometimes exhibit induced defenses to introduced predators, as a result of rapid evolution or other processes. We examin...

journal_title：Oecologia

authors： Bible JM,Griffith KR,Sanford E

更新日期：2017-03-01 00:00:00

abstract：:The duration and amount of water captured on leaves and its functional significance is highly varied. Leaf surface wettability influences water absorption, gas exchange, pathogen infection, nutrient leaching, contamination by pollutants, self-cleaning properties and in freezing environments the probability of extrinsi...

journal_title：Oecologia

authors： Aryal B,Neuner G

更新日期：2010-01-01 00:00:00

abstract：:Long-term studies were carried out in central Finland between 1985 and 2003 to examine the temporal and spatial variation in the density of otter populations. Snow tracking was used to estimate the total population and the number of litters in the study area. In total 52 otters, including 16 cubs in 11 litters, lived ...

journal_title：Oecologia

authors： Sulkava RT,Sulkava PO,Sulkava PE

更新日期：2007-09-01 00:00:00

abstract：:The up-regulation of secondary metabolic pathways following herbivore attack and the subsequent reduction in herbivore performance have been identified in numerous woody plant species. Eucalypts constitutively express many secondary metabolites in the leaves, including terpenes and formylated phloroglucinol compounds ...

journal_title：Oecologia

authors： Henery ML,Wallis IR,Stone C,Foley WJ

更新日期：2008-07-01 00:00:00

abstract：:Leaf diffusion resistance (r 1) of the upper and lower leaf surfaces of several Populus clones was related to leaf water potential (ψ1), light intensity, vapor pressure deficit (VPD), and temperature by intrinsicallylinear, logarithmic multiple regression analyses. Regression equations accounted for up to 80% of varia...

journal_title：Oecologia

authors： Pallardy SG,Kozlowski TT

更新日期：1979-01-01 00:00:00

abstract：:The logistic equation has been used as the basis of two distinct models of population dynamics, a resource limited model and an equilibrium model. It is argued that although the two models are very different, the distinction between them has been obscured by the use of the same terminology for the parameters of both. ...

journal_title：Oecologia

authors： Pollard E

更新日期：1981-07-01 00:00:00

abstract：:The dynamics of vegetative and reproductive growth were compared in matched pairs of Mediteranean and desert populations of three unrelated annual species, Erucaria hispanica (L.) Druce, Brachypodium distachyon (L.) Beauv. and Bromus fasciculatus C. Presl., under high and low levels of water availability in a common-e...

journal_title：Oecologia

authors： Aronson J,Kigel J,Shmida A,Klein J

更新日期：1992-01-01 00:00:00

abstract：:Herbivores are thought to achieve adequate nutrition by consuming numerous species of plants or by occasionally consuming animal tissue. Although active selection of diverse foods is common in nature, the relationship between diet mixing and consumer fitness is poorly understood, especially in marine environments. We ...

journal_title：Oecologia

authors： Cruz-Rivera E,Hay ME

更新日期：2000-05-01 00:00:00

abstract：:We examined how independent and interactive effects of CO2 concentrations, water supply and wind speed affect growth rates, biomass partitioning, water use efficiency, diffusive conductance and stomatal density of plants. To test the prediction that wind stress will be ameliorated by increased CO2 and/or by unrestrict...

journal_title：Oecologia

authors： Retuerto R,Woodward FI

更新日期：1993-06-01 00:00:00

abstract：:Individual species can have profound effects on ecological communities, but, in hyperdiverse systems, it can be challenging to determine the underlying ecological mechanisms. Simplifying species' responses by trophic level or functional group may be useful, but characterizing the trait structure of communities may be ...

journal_title：Oecologia

authors： Rogy P,Hammill E,Smith MA,Rost-Komiya B,Srivastava DS

更新日期：2020-04-01 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：:Ecologists routinely set out to estimate the trophic position of individuals, populations, and species composing food webs, and nitrogen stable isotopes (δ(15)N) are a widely used proxy for trophic position. Although δ(15)N values are often sampled at the level of individuals, estimates and confidence intervals are fr...

journal_title：Oecologia

authors： Reum JC,Marshall KN

更新日期：2013-12-01 00:00:00