Nitrate assimilation in coexisting vascular plants in mire and swamp forest habitats in Central Sweden.

abstract：:Mature growth-phase internodes of Alaska paper birch (Betula resinifera) are preferred by the snowshoe hare (Lepus americanus) over juvenile growth-phase internodes due to the low food value of the latter. While the mature over juvenile preferencec cannot be explained by the levels of inorganic nutrients or gross chem...

journal_title：Oecologia

authors： Reichardt PB,Bryant JP,Clausen TP,Wieland GD

更新日期：1984-12-01 00:00:00

abstract：:Plants derived from ten representative Limnanthes alba populations in Northern California, grown in a common environment, showed significant among-population genetic variation of certain floral and life history characters. Variation of these two sets of characters also correlated with the geographic distribution of po...

journal_title：Oecologia

authors： Ritland K,Jain S

更新日期：1984-08-01 00:00:00

abstract：:Plasticity in life-history characteristics was investigated in three populations of Plantago major L. ssp. pleiosperma (Pilger), a self-compatible, wind pollinated species with a high self-fertilization rate. The populations studied were selected for their marked differences in biomass accumulation and habitat charact...

journal_title：Oecologia

authors： Lotz LA,Blom CW

更新日期：1986-04-01 00:00:00

abstract：:Invasive species are capable of altering ecosystems through the consumption of basal resources. However, quantifying the effects of invasive species in large ecosystems is challenging. Measuring changes in basal resources (i.e., phytoplankton) at an ecosystem scale is an important and potentially translatable response...

journal_title：Oecologia

authors： Tumolo BB,Flinn MB

更新日期：2017-10-01 00:00:00

abstract：:Ectomycorrhizal (EM) fungi form relationships with higher plants; plants transfer C to fungi, and fungi transfer nutrients to their host. While evidence indicates that this interaction is largely mutualistic, less is known about how nutrient supply and EM associates may alter C and nutrient exchanges, especially in in...

journal_title：Oecologia

authors： Albarracín MV,Six J,Houlton BZ,Bledsoe CS

更新日期：2013-12-01 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：:A major goal of modern ecology is to understand macroecological patterns based on their mechanistic underpinnings. The metabolic theory of ecology predicts a monotonic increase of biodiversity with temperature based on the principles of metabolism. For marine copepods, observations have shown that while biodiversity d...

journal_title：Oecologia

authors： Record NR,Pershing AJ,Maps F

更新日期：2012-10-01 00:00:00

abstract：:Prescribed burning is a major control over element cycles in Tallgrass prairie (Eastern Kansas, USA). In this paper we report potential effects of fire on nonsymbiotic nitrogen fixation. Fire resulted in additions of available P in ash, which may stimulate nitrogen fixation by terrestrial cyanobacteria. Cyanobacterial...

journal_title：Oecologia

authors： Eisele KA,Schimel DS,Kapustka LA,Parton WJ

更新日期：1989-06-01 00:00:00

abstract：:Growth of woody species has two components, one pertaining to increment of biomass, the other to the architectonic arrangement of dry matter in space. Only the combination of both components explained the competitive strength of species that dominate in different stages of a hedgerow succession in Central Europe. Biom...

journal_title：Oecologia

authors： Küppers M

更新日期：1985-06-01 00:00:00

abstract：:Why can alien species succeed in environments to which they have had no opportunity to adapt and even become more abundant than many native species? Ecological theory suggests two main possible answers for this paradox: competitive superiority of exotic species over native species and opportunistic use of ecological o...

journal_title：Oecologia

authors： Sol D,Bartomeus I,Griffin AS

更新日期：2012-06-01 00:00:00

abstract：:Small changes in environmental conditions can unexpectedly tip an ecosystem from one community type to another, and these often irreversible shifts have been observed in semi-arid grasslands, freshwater lakes and ponds, coral reefs, and kelp forests. A commonly accepted explanation is that these ecosystems contain mul...

journal_title：Oecologia

authors： Petraitis PS,Methratta ET,Rhile EC,Vidargas NA,Dudgeon SR

更新日期：2009-08-01 00:00:00

abstract：:Two methods of extraction were used in the estimation of snail population densities in woodland litter. The time-consuming-Vágvölgyi technique proved to be 6.25 times more efficient than infra-red heat extraction but it was shown that the results obtained by the latter method could be easily corrected to conform with ...

journal_title：Oecologia

authors： Phillipson J,Abel R

更新日期：1983-03-01 00:00:00

abstract：:The activity behaviour of the common vole, Microtus arvalis was studied in an enclosure during a one-year cycle. The number of voles varied between 2 and 25 specimens. Emergence from burrows, running through pathways and visits at a feeding site were automatically recorded by passage counters which we developed for us...

journal_title：Oecologia

authors： Lehmann U,Sommersberg CW

更新日期：1980-01-01 00:00:00

abstract：:Density-dependent mortality may regulate many populations, but due to an offshore larval phase in benthic marine organisms, it is often difficult to quantify the effects of mortality of arriving individuals. We added approximately 600 recruit-sized individuals onto coral reef that parallels patterns in naturally settl...

journal_title：Oecologia

authors： Brunton BJ,Booth DJ

更新日期：2003-11-01 00:00:00

abstract：:Carbon allocation among bunchgrass tillers was examined with carbon-11 (11CO2) steady state labelling. Labelled carbon was continuously transported from parent tillers to anatomically attached daughter tillers at a time when morphological characteristics indicated that tiller maturation had occurred. Steady state leve...

journal_title：Oecologia

authors： Welker JM,Rykiel EJ Jr,Briske DD,Goeschl JD

更新日期：1985-09-01 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：:We examined the response of the birch tube-maker Acrobasis betulella Hulst (Lepidoptera: Pyralidae) to habitat patch isolation and edges. Density of A.␣betulella larva was higher on distant islands than on islands close to the shore. Following experimental removal of all larvae from the islands, adults were able to re...

journal_title：Oecologia

authors： Cappuccino N,Martin MA

更新日期：1997-03-01 00:00:00

abstract：:Interrelationships between morphology, microhabitat, water relations, and photosynthesis of a xeric fern, Notholaena parryi D.C. Eat. (Pteridaceae), were examined in the western Colorado desert. In its typical microhabitat rock outcroppings protected N. parryi from direct sunlight and moderated the diurnal variations ...

journal_title：Oecologia

authors： Nobel PS

更新日期：1978-01-01 00:00:00

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：:Recent discussions on scaling issues in ecology have emphasized that processes acting at a wide range of spatial and temporal scales influence ecosystems and thus there is no appropriate single scale at which ecological processes should be studied. This may be particularly true for environmental disturbances (e.g. El ...

journal_title：Oecologia

authors： Edwards MS

更新日期：2004-02-01 00:00:00

abstract：:The changing populations of weeds during 13 years of the Broadbalk continuous wheat experiment were analysed to investigate the extent of differences in shortterm variability of cover between species. The data were from two sections of the experiment where winter wheat was grown continuously under herbicide treatment ...

journal_title：Oecologia

authors： Firbank LG

更新日期：1993-06-01 00:00:00

abstract：:We tested whether interspecific competition from Aedes albopictus had measurable effects on A. aegypti at the typical numbers of larval mosquitoes found in cemetery vases in south Florida. We also tested whether the effect of interspecific competition from A. albopictus on A. aegypti differed between sites where A. ae...

journal_title：Oecologia

authors： Juliano SA,Lounibos LP,O'Meara GF

更新日期：2004-05-01 00:00:00

abstract：:Studies of predation by roach (Rutilus rutilus) on zebra mussel (Dreissena polymorpha) in a large, eutrophic lake showed that there was a clearly marked size threshold (∼ 160 mm SL) above which roach began to feed on mussels. Roach preying on various sizes of mussels selected them in proportions different from their a...

journal_title：Oecologia

authors： Prejs A,Lewandowski K,Stańczykowska-Piotrowska A

更新日期：1990-06-01 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：:The effects of defoliation of alder (Alnus glutinosa) on subsequent herbivory by alder leaf beetle (Agelastica alni) were studied in ten alder stands in northern Germany. At each site, one tree was manually defoliated (c. 20% of total foliage) to simulate herbivory. Subsequent damage by A. alni was assessed on ten ald...

journal_title：Oecologia

authors： Dolch R,Tscharntke T

更新日期：2000-12-01 00:00:00

abstract：:Chronic atmospheric N deposition has modified relative N availability, altering the biogeochemical cycles of forests and the stoichiometry of nutrients in trees, inducing P limitation, and modifying the N:P ratios of plant biomass. This study examines how the variation in the foliar stoichiometry of Abies pinsapo acro...

journal_title：Oecologia

authors： Blanes MC,Viñegla B,Merino J,Carreira JA

更新日期：2013-04-01 00:00:00

abstract：:The response to a single defoliation was studied on three clones of Themeda triandra collected in the short, mid, and tall grassland regions of the Serengeti National Park (Tanzania). These sites represent a gradient of decreasing grazing intensity. Growth, allocation pattern, and several morphometric traits were moni...

journal_title：Oecologia

authors： Oesterheld M,McNaughton SJ

更新日期：1988-11-01 00:00:00

abstract：:Research on winter energy management in small vertebrates has focused on the regulation of body mass (BM) within a framework of starvation-predation trade-off. Winter-acclimatized birds exhibit a seasonal increase in both BM and basal metabolic rate (BMR), although the patterns of co-variation between the two traits r...

journal_title：Oecologia

authors： Broggi J,Nilsson JF,Koivula K,Hohtola E,Nilsson JÅ

更新日期：2019-02-01 00:00:00

abstract：:It is illustrated theoretically that in a heterogeneous habitat the dispersal of individuals, even when it is random and density-independent, may have a pronounced effect of raising the average reproductive rate of the whole population, in addition to the effect of stabilization in the usual sense of reducing its vari...

journal_title：Oecologia

authors： Kuno E

更新日期：1981-05-01 00:00:00

abstract：:Life history theory predicts that migratory fishes should delay reproduction, be larger at first reproduction, and have higher fecundities than nonmigrants. We tested this hypothesis by comparing life histories of anadromous ("estuary") and resident freshwater ("upstream") threespine sticklebacks (Gasterosteus aculeat...

journal_title：Oecologia

authors： Snyder RJ,Dingle H

更新日期：1990-10-01 00:00:00