Cross-shoal variability in the feeding habits of migrating Atlantic cod (Gadus morhua).

abstract：:We studied the disturbance associated with prairie vole burrows and its effects on grassland plant diversity at the patch (1 m(2)) and metacommunity (>5 ha) scales. We expected vole burrows to increase patch-scale plant species diversity by locally reducing competition for resources or creating niche opportunities tha...

journal_title：Oecologia

authors： Questad EJ,Foster BL

更新日期：2007-08-01 00:00:00

abstract：:Spatial and temporal variation in resource distribution affect the movement and foraging behavior of many animals. In the case of animal-dispersed trees, numerous studies have addressed masting-the synchronized variation in seed production between years-but the fitness consequences of spatial variation in seed product...

journal_title：Oecologia

authors： Pesendorfer MB,Koenig WD

更新日期：2016-05-01 00:00:00

abstract：:Seasonal reductions in food availability may cause animals to catabolize endogenous tissue and the resulting loss of lean mass can hinder their ability to forage and reproduce. While several studies have considered nitrogen isotopes (δ15N) as an indicator of catabolism, relationships between protein intake, body condi...

journal_title：Oecologia

authors： Hughes KL,Whiteman JP,Newsome SD

更新日期：2018-02-01 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：:Plant species composition is changing across many landscapes, but it is unclear how these changes affect habitat quality for animals. We used functional diversity and community-weighted mean (CWM) trait values for four plant traits (litter N, P, lignin and soluble phenolics) to explore how changes in plant species com...

journal_title：Oecologia

authors： Cohen JS,Rainford SK,Blossey B

更新日期：2014-04-01 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：:Genets of Trifolium repens (white clover) were collected from three patches of old permanent pasture dominated by Agrostis capillaris, Holcus lanatus or Lolium perenne. Plants derived from the genets were grown with plants of one grass species present on one side of each T. repens, and a different grass species on the...

journal_title：Oecologia

authors： Turkington R,Hamilton RS,Gliddon C

更新日期：1991-04-01 00:00:00

abstract：:Canopy CO2 concentrations in a tropical rainforest in French Guiana were measured continuously for 5 days during the 1994 dry season and the 1995 wet season. Carbon dioxide concentrations ([CO2]) throughout the canopy (0.02-38 m) showed a distinct daily pattern, were well-stratified and decreased with increasing heigh...

journal_title：Oecologia

authors： Buchmann N,Guehl JM,Barigah TS,Ehleringer JR

更新日期：1997-03-01 00:00:00

abstract：:Much of the research into herbivore ecology and evolution has focused on patterns and mechanisms of niche partitioning in the diets of specialized grazers and browsers, but the significance of the balance of grazing and browsing within intermediate feeders present unique questions that have received less attention. We...

journal_title：Oecologia

authors： Christianson D,Creel S

更新日期：2009-01-01 00:00:00

abstract：:We assessed the ecomorphological structure of a guild of rhinolophoid bats in a Malaysian rainforest first described by Heller and von Helversen (1989). These authors found that the distribution of echolocation call frequencies used by 12 syntopic species was more even than expected from allometric relationships or in...

journal_title：Oecologia

authors： Kingston T,Jones G,Zubaid A,Kunz TH

更新日期：2000-08-01 00:00:00

abstract：:Changing environments can have divergent effects on biodiversity-ecosystem function relationships at alternating trophic levels. Freshwater mussels fertilize stream foodwebs through nutrient excretion, and mussel species-specific excretion rates depend on environmental conditions. We asked how differences in mussel di...

journal_title：Oecologia

authors： Spooner DE,Vaughn CC,Galbraith HS

更新日期：2012-02-01 00:00:00

abstract：:Pathogens can drive host population dynamics. Chytridiomycosis is a fungal disease of amphibians that is caused by the fungus Batrachochytrium dendrobatidis (Bd). This pathogen has caused declines and extinctions in some host species whereas other host species coexist with Bd without suffering declines. In the early 1...

journal_title：Oecologia

authors： Sapsford SJ,Voordouw MJ,Alford RA,Schwarzkopf L

更新日期：2015-12-01 00:00:00

abstract：:Interspecific relationships such as mutualism and parasitism are major drivers of biodiversity. Because such interactions often comprise more than two species, ecological studies increasingly focus on complex multispecies systems. However, the spatial heterogeneity of multi-species interactions is often poorly underst...

journal_title：Oecologia

authors： Schöner CR,Schöner MG,Kerth G,Grafe TU

更新日期：2013-09-01 00:00:00

abstract：:The palatability of 14 species of woody plant was assessed for three species of browsing ruminant, namely kudus, impalas and goats. Results show that palatability was most clearly related to leaf contents of condensed tannins. The effect was a threshold one, with all plants containing more than 5% condensed tannins be...

journal_title：Oecologia

authors： Cooper SM,Owen-Smith N

更新日期：1985-08-01 00:00:00

abstract：:Eriophorum vaginatum is a characteristic species of northern peatlands and a keystone plant for cutover bog restoration. Understanding the factors affecting E. vaginatum seedling establishment (i.e. growth dynamics and allocation) under global change has practical implications for the management of abandoned mined bog...

journal_title：Oecologia

authors： Siegenthaler A,Buttler A,Grosvernier P,Gobat JM,Nilsson MB,Mitchell EA

更新日期：2013-02-01 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：:The ability to utilize NO inf3sup- in seven high arctic plant species from Truelove Lowland, Devon Island, Canada was investigated, using an in vivo assay of maximum potential nitrate reductase (NR) activity and applications of 15N. Plant species were selected on the basis of being characteristic of nutrient-poor and ...

journal_title：Oecologia

authors： Atkin OK,Villar R,Cummins WR

更新日期：1993-11-01 00:00:00

abstract：:Three-to-five-year population oscillations of northern small rodents are usually synchronous over hundreds of square kilometers. This regional synchrony could be due to similarity in climatic factors, or due to nomadic predators reducing the patches of high prey density close to the average density of a larger area. W...

journal_title：Oecologia

authors： Norrdahl K,Korpimäki E

更新日期：1996-09-01 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：: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：:The influence of ant attendance on parasitization of the larvae of three hawthorn psyllid species [Cacopsylla peregrina Förster, C. melanoneura Förster, C. crataegi (Schrank)] was studied over 2 years. All three psyllid species had low parasitization rates. However, the ant-attended C. crataegi was almost exclusively ...

journal_title：Oecologia

authors： Novak H

更新日期：1994-09-01 00:00:00

abstract：:This study quantified both the age- and sex-specific survival rates of juveniles and adults, and tested for interannual differences in age-specific survival rates of the southern elephant seal population at Marion Island. Pups were tagged on an annual basis from 1983 onwards at Marion Island, and a consistent recaptur...

journal_title：Oecologia

authors： Pistorius PA,Bester MN,Kirkman SP

更新日期：1999-11-01 00:00:00

abstract：:Severe droughts may alter the reproductive phenology of tropical tree species, but our understanding of these effects has been hampered by confounded variation in drought, light and other factors during natural drought events. We used a large-scale experimental reduction of throughfall in an eastern-central Amazon for...

journal_title：Oecologia

authors： Brando P,Ray D,Nepstad D,Cardinot G,Curran LM,Oliveira R

更新日期：2006-11-01 00:00:00

abstract：:Individuals of the collembolan species Tomocerus flavescens from a beech wood on limestone near Göttingen (West Germany) were fed with C-14-labelled algae in the laboratory. On an average, T. flavescens exchanged almost all of its endogenous carbon after 3.4 moults. In periods of starvation the interval between two ec...

journal_title：Oecologia

authors： Wolters V

更新日期：1985-01-01 00:00:00

abstract：:This study links summer foraging and scatter-hoarding to winter larder-hoarding and winter survival in yellow pine chipmunks (Tamias amoenus) by comparing patterns of time allocation and winter larder contents in 2 years with very different levels of resource availability. In 2003, seed production and the number of tr...

journal_title：Oecologia

authors： Kuhn KM,Vander Wall SB

更新日期：2008-08-01 00:00:00

abstract：:Mature male parr successfully fertilized eggs of anadromous female Atlantic salmon, Salmo salar, in competition with anadromous males under simulated natural conditions. Mating situations were created in which mature male parr and anadromous males competing for the opportunity to spawn with an anadromous female differ...

journal_title：Oecologia

authors： Hutchings JA,Myers RA

更新日期：1988-03-01 00:00:00

abstract：:Experimental studies were used to examine the mechanisms governing the distribution and abundance of two major patch types in unshaded reaches of Augusta Creek, Michigan (USA). One patch type is dominated by Cladophora glomerata, a macroalga potentially able to monopolize space, whereas the other type is comprised of ...

journal_title：Oecologia

authors： Hart DD

更新日期：1992-08-01 00:00:00

abstract：:Optimal foraging theory is based on the assumption that at least some aspects of foraging behavior are genetically determined (Pyke et al. 1977; Kamil and Sargent 1980; Pyke 1984). Nonetheless, very few studies have examined the role of genetics in foraging behavior. Here, we report on geographical differences in the ...

journal_title：Oecologia

authors： Hedrick AV,Riechert SE

更新日期：1989-09-01 00:00:00

abstract：:We examined cellular immunity of adult tree swallows feeding nestlings under variable weather conditions. Birds received an injection of phytohaemagglutinin (PHA), which causes a local swelling, reflecting the strength of T-cell-mediated immunocompetence. There was a negative relationship between the immune response a...

journal_title：Oecologia

authors： Lifjeld JT,Dunn PO,Whittingham LA

更新日期：2002-01-01 00:00:00

abstract：:The effect of low intensity continuous light, e.g., in the High Arctic summer, on plant carbon and hydrogen isotope fractionations is unknown. We conducted greenhouse experiments to test the impact of light quantity and duration on both carbon and hydrogen isotope compositions of three deciduous conifers whose fossil ...

journal_title：Oecologia

authors： Yang H,Pagani M,Briggs DE,Equiza MA,Jagels R,Leng Q,Lepage BA

更新日期：2009-06-01 00:00:00