The meanings of r- and K-selection.

abstract：:Intensive harvesting of native eucalypt forests is carried out in the Eden area in the south east coastal region of New South Wales, Australia. Soil nutrient capital and nutrient removals in forest harvesting were estimated together with potential impacts of these removals on the nutrient capital balance. Soils were a...

journal_title：Oecologia

authors： Turner J,Lambert MJ

更新日期：1986-08-01 00:00:00

abstract：:I tested hypotheses for ecological roles of storage carbohydrates in perennating organs (roots and branches) of alpine Oxytropis sericea, a leguminous herb. In naturally growing plants, total nonstructural carbohydrates achieved their maximal concentration in the fall, declined during winter, and reached minimal level...

journal_title：Oecologia

authors： Wyka T

更新日期：1999-08-01 00:00:00

abstract：:Plasticity of plant traits is commonly quantified by comparing different phenotypes at the same age. In this paper, we present a method in which the effect of resource conditions on plant weight is used as a basis for quantifying the plasticity of individual plant traits. Abutilon theophrasti individuals were grown in...

journal_title：Oecologia

authors： Rice SA,Bazzaz FA

更新日期：1989-03-01 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：:With multiple species introductions and rapid global changes, there is a need for comprehensive invasion models that can predict community responses. Evidence suggests that abiotic constraint, propagule pressure, and biotic resistance of resident species each determine plant invasion success, yet their interactions ar...

journal_title：Oecologia

authors： Byun C,de Blois S,Brisson J

更新日期：2015-05-01 00:00:00

abstract：:Despite the potential impact on prey fitness and predator-prey interactions, most studies of predation risk ignore physiological responses and their dependence upon food level and sex. Therefore, we reared male and female larvae of the damselfly Lestes viridis under predator stress (dragonfly larvae) at high and low f...

journal_title：Oecologia

authors： Slos S,De Meester L,Stoks R

更新日期：2009-09-01 00:00:00

abstract：:We tested the hypothesis that generally higher levels of herbivory on bittercress in sun vs in shade, especially by leaf miners, were related to the earlier phenological development of plants in the sun. Naturally-occurring plants in the sun were taller and had longer leaves than did those in the shade during the firs...

journal_title：Oecologia

authors： Collinge SK,Louda SM

更新日期：1989-04-01 00:00:00

abstract：:The percent of species of the Cyperaceae possessing the C4 pathway was calculated for twenty-five regions of North America. A stepwise multiple regression analysis was used to determine which climatic variables were most highly correlated with the percent C4 species among the various regions. The square of the mean Ju...

journal_title：Oecologia

authors： Teeri JA,Livingstone DA

更新日期：1980-12-01 00:00:00

abstract：:We tested the hypothesis that leaves of broad-leaved tree species are more highly defended at low latitudes than at high latitudes. We used canonical discriminant analysis to compare tree species from Panama (9°N, 39 species), Missouri, USA (38°N, 37 species), and southern Ontario, Canada (44°N, 34 species) with respe...

journal_title：Oecologia

authors： Marquis RJ,Ricklefs RE,Abdala-Roberts L

更新日期：2012-07-01 00:00:00

abstract：:Mortality estimates for the immature stages of two butterfly species, Danaus plexippus and D. chrysippus, were obtained by observing the survival of egg cohorts on different sized patches of food plants (Asclepias spp.), over a one-year period. Losses were variable (0-100%) but usually high (90% and over) throughout t...

journal_title：Oecologia

authors： Zalucki MP,Kitching RL

更新日期：1982-01-01 00:00:00

abstract：:The remains of northern fur seals (Callorhinus ursinus) are among the most abundant of pinniped elements recovered from mainland coastal archaeological sites in both California and Oregon. This is surprising as all contemporary northern fur seals breed exclusively on offshore islands, primarily at high latitudes, and ...

journal_title：Oecologia

authors： Burton RK,Snodgrass JJ,Gifford-Gonzalez D,Guilderson T,Brown T,Koch PL

更新日期：2001-06-01 00:00:00

abstract：:Clone mal9, a genotype ofSolanum dulcamara L. having photosynthetic characteristics similar to previously hypothesized shade ecotypes, is compared to five other genotypes having photosynthetic characteristics similar to previously hypothesized sun ecotypes. The primary differences are a 35% reduction in total leaf con...

journal_title：Oecologia

authors： Clough JM,Alberte RS,Teeri JA

更新日期：1980-01-01 00:00:00

abstract：:While morphological differences such as tongue length are often featured as drivers of pollinator floral preferences, differences in chemical detection and tolerance to secondary compounds may also play a role. We sought to better understand the role of secondary compounds in floral preference by examining visitation ...

journal_title：Oecologia

authors： Villalona E,Ezray BD,Laveaga E,Agrawal AA,Ali JG,Hines HM

更新日期：2020-07-01 00:00:00

abstract：:Cottonwoods are dominant riparian trees of the western United States and are known for their propensity to hybridize. We compared the decomposition of leaf litter from two species (Populus angustifolia and P. fremontii) and their hybrids. Three patterns were found. First, in one terrestrial and two aquatic experiments...

journal_title：Oecologia

authors： Driebe EM,Whitham TG

更新日期：2000-04-01 00:00:00

abstract：:Ecosystem-wide effects of introduced brown trout (Salmo trutta L.) and native river galaxias (Galaxiaseldoni McDowall) were studied by analysing ecosystem production budgets for two adjacent tributaries of a grassland stream-system in the South Island of New Zealand. One tributary was inhabited by brown trout, the oth...

journal_title：Oecologia

authors： Huryn AD

更新日期：1998-06-01 00:00:00

abstract：:Understanding the mechanisms producing and maintaining discontinuities between patches in mosaics of habitats is necessary to predict changes in patterns of abundance and distribution of species. On temperate rocky reefs, physical and biological disturbance can result in a mosaic of patches of encrusting coralline, tu...

journal_title：Oecologia

authors： Bulleri F,Benedetti-Cecchi L

更新日期：2006-09-01 00:00:00

abstract：:Branch sampling of branch diameter and fruit crop on 22 species of Barbadian trees and shrubs provided sufficient data to build regressions between plant size and fruit crop weight. Orchard plants bear much more fruit than wild, feral or garden plants of similar size, but this difference disappears in multiple regress...

journal_title：Oecologia

authors： Peters RH,Cloutier S,Dubé D,Evans A,Hastings P,Kaiser H,Kohn D,Sarwer-Foner B

更新日期：1988-01-01 00:00:00

abstract：:Although ecological disturbances can have a strong influence on pollinators through changes in habitat, virtually no studies have quantified how characteristics of wildfire influence the demography of essential pollinators. Nevertheless, evaluating this topic is critical for understanding how wildfire is linked to pol...

journal_title：Oecologia

authors： Galbraith SM,Cane JH,Rivers JW

更新日期：2021-01-03 00:00:00

abstract：:Species-habitat relationships are an important aspect of fish life history, particularly in early ontogeny. To address the lack of information on the microhabitat use/requirements of European coarse fishes, particularly 0-group fishes in riverine systems, an empirical model was generated from data collected in the Riv...

journal_title：Oecologia

authors： Copp GH

更新日期：1992-09-01 00:00:00

abstract：:The host specificity of insect parasitoids and herbivores is thought to be shaped by a suite of traits that mediate host acceptance and host suitability. We conducted laboratory experiments to identify mechanisms shaping the host specificity of the aphid parasitoid Binodoxys communis. Twenty species of aphids were exp...

journal_title：Oecologia

authors： Desneux N,Barta RJ,Hoelmer KA,Hopper KR,Heimpel GE

更新日期：2009-05-01 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：:The presence of litter has the potential to alter the population dynamics of plants. In this paper, we explore the effects of litter on population dynamics using a simple experimental laboratory system with populations of the annual crucifer, Cardamine pensylvanica. Using a factorial experiment with four densities and...

journal_title：Oecologia

authors： Molofsky J,Lanza J,Crone EE

更新日期：2000-09-01 00:00:00

abstract：:Spatiotemporal variation in the interactions among plants and animals is widespread; yet our conceptual and empirical understanding of this variation is limited to a few types of visitors, mainly herbivores, pollinators, seed predators, and seed dispersers. Despite the ubiquity of nectar robbing and the strength of it...

journal_title：Oecologia

authors： Irwin RE,Maloof JE

更新日期：2002-12-01 00:00:00

abstract：:Data in the literature that in the Netherlands Carabus problematicus is an autumn breeder with overwintering larvae and adults have been confirmed. Pitfall catches show two peaks of adult beetles. The first small peak of activity is realized in May, the significance of which is not yet understood. The second higher pe...

journal_title：Oecologia

authors： Rijnsdorp AD

更新日期：1980-05-01 00:00:00

abstract：:It has been postulated that free amino acids in the diet of herbivores are a more readily available source of nitrogen than are amino acids in intact proteins. When plants are subjected to any of a number of stress factors the concentration of free amino acids in their tissues may increase relative to the protein cont...

journal_title：Oecologia

authors： Cockfield SD

更新日期：1988-10-01 00:00:00

abstract：:Animals in fragmented landscapes have a major challenge to move between high-quality habitat patches through lower-quality matrix. Two current mechanistic hypotheses that describe the movement used by animals outside of their preferred patches (e.g., high-quality habitat or home range) are the biased, correlated rando...

journal_title：Oecologia

authors： McIntire EJ,Rompré G,Severns PM

更新日期：2013-05-01 00:00:00

abstract：:The turnover of plant biomass largely determines the amount of energy flowing through an ecosystem and understanding the processes that regulate turnover has been of interest to ecologists for decades. Leaf life span theory has proven useful in explaining patterns of leaf turnover in relation to resource availability,...

journal_title：Oecologia

authors： Rodriguez GE,Reed DC,Holbrook SJ

更新日期：2016-10-01 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：: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：:Three types of experiments indicate that the functional organization of the mountain birch may influence the ways in which the tree responds to simulated or natural herbivory. The first experiment showed that herbivory to both short and long shoot leaves affects plant development but, because growth largely proceeds b...

journal_title：Oecologia

authors： Haukioja E,Ruohomäki K,Senn J,Suomela J,Walls M

更新日期：1990-02-01 00:00:00