Phosphorus and nitrogen resorption from different chemical fractions in senescing leaves of tropical tree species on Mount Kinabalu, Borneo.

abstract：:A central point in life history theory is that parental investment in current reproduction should be balanced by the costs in terms of residual reproductive value. Long-lived seabirds are considered fixed investors, that is, parents fix a specific level of investment in their current reproduction independent to the br...

journal_title：Oecologia

authors： Navarro J,González-Solís J

更新日期：2007-02-01 00:00:00

abstract：:In the eight Pardosa species studied, aerial dispersal occurs generally in the young instars. The climatic conditions, particularly wind but also temperature and humidity, affect the occurrence of aerial dispersal. Within the different systematic groups in the genus, species with relatively high and relatively low dis...

journal_title：Oecologia

authors： Richter CJ

更新日期：1970-09-01 00:00:00

abstract：:Resource supply and pollen delivery are often thought to equally limit seed production in animal-pollinated plants. At equilibrium, plants should show no response to experimental pollen supplementation because resources limit seed set above the current level of pollen attraction, while experimental reduction in pollen...

journal_title：Oecologia

authors： Ornelas JF,Lara C

更新日期：2009-07-01 00:00:00

abstract：:In the tropical dry forest of the central Pacific coast of Mexico the pollination and reproductive success of the bombacaceous tree Ceiba grandiflora was negatively affected by habitat disruption. Two of the three bat species that function as effective pollinators for this species ( Glossophaga soricina and Musonycter...

journal_title：Oecologia

authors： Quesada M,Stoner KE,Rosas-Guerrero V,Palacios-Guevara C,Lobo JA

更新日期：2003-05-01 00:00:00

abstract：:Among species, photosynthetic capacity (Amax) is usually related to leaf nitrogen content (N), but variation in the species-specific relationship is not well understood. To address this issue, we studied Amax-N relationships in 23 species in adjacent Amazonian communities differentially limited by nitrogen (N), phosph...

journal_title：Oecologia

authors： Reich PB,Walters MB,Ellsworth DS,Uhl C

更新日期：1994-02-01 00:00:00

abstract：:In resource-limited savannas, the distribution and abundance of fine roots play an important role in acquiring essential resources and structuring vegetation patterns and dynamics. However, little is known regarding the three-dimensional distribution of fine roots in savanna ecosystems at the landscape scale. We quant...

journal_title：Oecologia

authors： Zhou Y,Boutton TW,Wu XB,Wright CL,Dion AL

更新日期：2018-04-01 00:00:00

abstract：:Spatial variation in biotic interactions and natural selection are fundamental parts of natural systems, and can be driven by differences in both trait distributions and the local environmental context of the interaction. Most studies of plant-animal interactions have been performed only in natural settings, making it...

journal_title：Oecologia

authors： König MA,Wiklund C,Ehrlén J

更新日期：2014-04-01 00:00:00

abstract：:In ant-plant symbioses, the behavior of ant inhabitants affects the nature of the interaction, ranging from mutualism to parasitism. Mutualistic species confer a benefit to the plant, while parasites reap the benefits of the interaction without reciprocating, potentially resulting in a negative impact on the host plan...

journal_title：Oecologia

authors： Tillberg CV

更新日期：2004-08-01 00:00:00

abstract：:Seeds dispersed by tropical, arboreal mammals are usually deposited singly and without dung or in clumps of fecal material. After dispersal through defecation by mammals, most seeds are secondarily dispersed by dung beetles or consumed by rodents. These post-dispersal, plant-animal interactions are likely to interact ...

journal_title：Oecologia

authors： Andresen E,Levey DJ

更新日期：2004-03-01 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：:Biodiverse environments provide a variety of resources that can be exploited by consumers. While many studies revealed a positive correlation between biodiversity and consumer biomass and richness, only few studies have investigated how resource diversity affects single consumers. To better understand whether a single...

journal_title：Oecologia

authors： Drescher N,Wallace HM,Katouli M,Massaro CF,Leonhardt SD

更新日期：2014-12-01 00:00:00

abstract：:Geographic patterns of intraspecific variations in traits related to photosynthesis and biomass were examined in two separate common garden experiments using seed collected from 26 Sitka alder (Alnus sinuata Rydb.) and 18 paper birch (Betula papyrifera Marsh.) populations from climatically diverse locations in British...

journal_title：Oecologia

authors： Benowicz A,Guy RD,El-Kassaby YA

更新日期：2000-05-01 00:00:00

abstract：:The need to allocate a limited amount of energy between different life-history traits is a fundamental assumption in life-history theory. However, it has often turned out to be extremely difficult to measure the competing processes that contribute to costs or benefits for individual organisms. The present investigatio...

journal_title：Oecologia

authors： Stadler B

更新日期：1995-05-01 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：: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：:This study examines the impacts of woody, N2-fixing invasive Acacia spp. on the patterns of nutrient cycling in two invaded ecosystems of differing nutrient status in the Cape floristic region. Patterns of soil nutrient mineralization were measured by a field incubation method while the significance of the fixation pr...

journal_title：Oecologia

authors： Stock WD,Wienand KT,Baker AC

更新日期：1995-03-01 00:00:00

abstract：:Leaf surface conductance and apparent photosynthesis were measured during late summer and autumn on saplings and sprouts of pin cherry (Prunus pensylvanica), yellow birch (Betula alleghaniensis), American beech (Fagus grandifolia), and sugar maple (Acer saccharum) naturally revegetating a site in the northern hardwood...

journal_title：Oecologia

authors： Amthor JS,Gill DS,Bormann FH

更新日期：1990-08-01 00:00:00

abstract：:The time at which plants emerge from the soil is shown to be correlated with both survival and growth in each of four years in a plant community emerging after yearly plowing. For all seven species investigated, earlier emerging individuals generally had both a higher biomass and probability of survival. There were di...

journal_title：Oecologia

authors： Miller TE

更新日期：1987-05-01 00:00:00

abstract：:Interactions among granivores and seeds depend on the foraging behaviour and morphology of the granivores and on the attributes and availability of seeds. We investigated seed selection by the seed harvesting ant Messor bouvieri in three adjacent plant communities in Spain by relating the harvested seeds to those in t...

journal_title：Oecologia

authors： Willott SJ,Compton SG,Incoll LD

更新日期：2000-10-01 00:00:00

abstract：:Kelrick et al. (1986) argued that seed preferences of desert granivores are strongly influenced by soluble carbohydrate contents of native seed species. They assumed that bitterbrush (Purshia tridentata) seeds are eaten in their entirety by rodents, but in fact these granivores eat only embryos of bitterbrush seeds. E...

journal_title：Oecologia

authors： Jenkins SH

更新日期：1988-04-01 00:00:00

abstract：:Shoot herbivory by the sapling specialist shoot-borer Cromarcha stroudagnesia (Lepidoptera, Pyralidae, Chrysauginae) is shown to have large direct and indirect effects on the rates of height increment and mortality of saplings of its host tree, Tabebuia ochracea (Bignoniaceae), in the secondary successional tropical d...

journal_title：Oecologia

authors： Sullivan JJ

更新日期：2003-06-01 00:00:00

abstract：:It has long been argued that seed dispersal enhances recruitment in tropical trees by allowing offspring to `escape' strong density/distance-dependent attack by insects, pathogens and rodents. Here we examined the effects of canopy openness and parent-offspring distance upon the frequency and timing of Chlorocardium r...

journal_title：Oecologia

authors： Hammond DS,Brown VK,Zagt R

更新日期：1999-05-01 00:00:00

abstract：:1. There is a well-defined time sequence in the oxygen consumption of Porcellio scaber. A maximal rate (the 'active rate') is obtained in woodlice subjected to the maximal disturbance of food presentation, handling and light. After initial exploratory activity has ceased, the oxygen consumption declines through a seri...

journal_title：Oecologia

authors： Newell RC,Wieser W,Pye VI

更新日期：1974-03-01 00:00:00

abstract：:The food selection of the common goby, Pomatoschistus microps Krøyer, was studied in the field and in laboratory experiments on the Swedish west coast. The three most important prey organisms for P. microps in the study area were Corophium volutator, chironomid larvae and Nereis spp. Corophium was consumed more than a...

journal_title：Oecologia

authors： Magnhagen C,Wiederholm AM

更新日期：1982-12-01 00:00:00

abstract：:Effects of habitat fragmentation on species diversity and herbivore-parasitoid interactions were analyzed using the insect community of seed feeders and their parasitoids in the pods of the bush vetch (Vicia sepium L.). Field studies were carried out on 18 old meadows differing in area and isolation. The area of these...

journal_title：Oecologia

authors： Kruess A,Tscharntke T

更新日期：2000-01-01 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：:Many bumblebee species are declining at a rapid rate in the United Kingdom and elsewhere. This is commonly attributed to the decline in floral resources that has resulted from an intensification in farming practices. Here we assess growth of nests of the bumblebee, Bombus terrestris, in habitats providing different le...

journal_title：Oecologia

authors： Goulson D,Hughes W,Derwent L,Stout J

更新日期：2002-01-01 00:00:00

abstract：:In southeastern Arizona, Prosopis juliflora (Swartz) DC. and Quercus emoryi Torr. are the dominant woody species at grassland/woodland boundaries. The stability of the grassland/woodland boundary in this region has been questioned, although there is no direct evidence to confirm that woodland is encroaching into grass...

journal_title：Oecologia

authors： McPherson GR,Boutton TW,Midwood AJ

更新日期：1993-02-01 00:00:00

abstract：:Asexual fungal endophytes, which do not produce reproductive structures, spread in host populations only vertically via the propagules of their hosts. With such a close relationship between the fitness of the asexual endophyte and that of the host, the relationship is traditionally thought to be mutualistic. Here we p...

journal_title：Oecologia

authors： Olejniczak P,Lembicz M

更新日期：2007-06-01 00:00:00

abstract：:Difficulties in using genetic markers to demonstrate that changes in gene frequency cause fluctuations in the density of animal populations are illustrated. The frequency of chicks with light-coloured down increased during 4 years when population density of red grouse declined and the inherent level of aggressive beha...

journal_title：Oecologia

authors： Moss R,Watson A

更新日期：1987-10-01 00:00:00