Demographic costs of Chaoborus-induced defences in Daphnia pulex: a sensitivity analysis.

abstract：:Growth and reproduction of twoDaphnia species (Cladocera) from Lake Constance were measured experimentally in a through-flow laboratory system under different food conditions, in order to investigate the effect of food quality on zooplankton populations. The cryptomonadRhodomonas sp. and the diatomStephanodiscus hantz...

journal_title：Oecologia

authors： Giani A

更新日期：1991-09-01 00:00:00

abstract：:Spontaneous bleeding of sugar-rich sap from cambial-deep incisions in the bark of trunks was demonstrated for Eucalyptus globulus and other eucalypts across a range of localities and seasonal conditions in south-west Australia. High levels of sucrose and raffinose (up to 31% w/v total sugars) were present in the exuda...

journal_title：Oecologia

authors： Pate J,Shedley E,Arthur D,Adams M

更新日期：1998-12-01 00:00:00

abstract：:Inoculation with arbuscular mycorrhizal (AM) fungi is known to increase the species diversity of plant communities. One mechanism that can increase the likelihood of species co-existence, and thus species diversity, is a trade-off between competitive ability and the magnitude of plant growth response to AM fungal inoc...

journal_title：Oecologia

authors： Stanescu S,Maherali H

更新日期：2017-02-01 00:00:00

abstract：:The climatic control of productivity for two populations of the lichen Cetraria cucullata (Bell.) Ach. growing in the arctic tundra of northern Alaska (70°28'N, 157°23'W) was examined. Respiratory losses of carbon vary with tissue temperature, tissue water content, and time since wetting. Potential net photosynthetic ...

journal_title：Oecologia

authors： Lechowicz MJ

更新日期：1981-08-01 00:00:00

abstract：:The effects of a number of factors, notably leaf mining insects, on the longevity of beech and holm oak leaves have been studied. The regular monitoring of individually labelled leaves was complemented by analysis of leaf fall data. Both methods confirm that these mining insects have only a slight impact on their host...

journal_title：Oecologia

authors： Pritchard IM,James R

更新日期：1984-09-01 00:00:00

abstract：:Canopy nitrogen (N) is a key factor regulating carbon cycling in forest ecosystems through linkages among foliar N and photosynthesis, decomposition, and N cycling. This analysis examined landscape variation in canopy nitrogen and carbon assimilation in a temperate mixed forest surrounding Harvard Forest in central Ma...

journal_title：Oecologia

authors： Zhou Z,Ollinger SV,Lepine L

更新日期：2018-10-01 00:00:00

abstract：:In long-lived species, adult survival is the population parameter having the highest elasticity, and therefore, it can be expected to be least affected by climatic variations. We studied the dynamics and survival of breeding female common eiders Somateria mollissima mollissima in the Baltic Sea from 1960 to 2007. Usin...

journal_title：Oecologia

authors： Hario M,Mazerolle MJ,Saurola P

更新日期：2009-04-01 00:00:00

abstract：:Diel vertical migration (DVM) of herbivorous zooplankton is a widespread behavioural phenomenon in freshwater ecosystems. So far only little attention has been paid to the impact of DVM on the phytoplankton community in the epilimnion. Some theoretical models predict that algal population growth in the epilimnion shou...

journal_title：Oecologia

authors： Reichwaldt ES,Wolf ID,Stibor H

更新日期：2004-11-01 00:00:00

abstract：:Regulation of seed germination phenology is an important aspect of the life history strategy of invading annual plant species. In the obligately selfing winter annual grass Bromus tectorum, seeds are at least conditionally dormant at dispersal in early summer and lose dormancy through dry-afterripening. Patterns of ge...

journal_title：Oecologia

authors： Meyer SE,Allen PS

更新日期：1999-07-01 00:00:00

abstract：:Plant-plant facilitation is a crucial ecological process, as many plant species (facilitated) require the presence of an established individual (nurse) to recruit. Some plant facilitative interactions disappear during the ontogenetic development of the facilitated plant but others persist, even when the two plants are...

journal_title：Oecologia

authors： Montesinos-Navarro A,Segarra-Moragues JG,Valiente-Banuet A,Verdú M

更新日期：2016-06-01 00:00:00

abstract：:The stress-gradient hypothesis (SGH) predicts that the community-wide prevalence of positive interactions, relative to negative interactions, is greater under more severe environmental conditions. Because the frequency of positive and negative interactions within a community is the aggregate of multiple pair-wise inte...

journal_title：Oecologia

authors： le Roux PC,McGeoch MA

更新日期：2010-03-01 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：:We demonstrate that an egg parasitoid, Anagrus delicatus (Mymaridae, Hymenoptera) and its host, Prokelesia marginata (Delphacidae, Homoptera) regularly disperse 1 km or more in a north Florida saltmarsh. Anagrus delicatus were caught on yellow sticky traps on offshore islets and oyster bars throughout the spring, summ...

journal_title：Oecologia

authors： Antolin MF,Strong DR

更新日期：1987-09-01 00:00:00

abstract：:Twenty nine harpacticoid copepods are new to Bermuda and significant changes are noted in the distribution records of several species. Six temporary groups are organized to separate the copepods on their apparent zoogeographical ranges: (1) cosmopolitan, (2) warm temperate-tropical, (3) North Atlantic, (4) North Atlan...

journal_title：Oecologia

authors： Coull BC,Herman SS

更新日期：1970-12-01 00:00:00

abstract：:As the impact of anthropogenic activities intensifies worldwide, an increasing proportion of landscape is converted to early successional stages every year. To understand and anticipate the global effects of the human footprint on wildlife, assessing short-term changes in animal populations in response to disturbance ...

journal_title：Oecologia

authors： Martineau J,Pothier D,Fortin D

更新日期：2016-07-01 00:00:00

abstract：:Since the publication of the theory of island biogeography, ecologists have postulated that fragmentation of continuous habitat presents a prominent threat to species diversity. However, negative fragmentation effects may be artifacts; the result of species diversity declining with habitat loss, and habitat loss corre...

journal_title：Oecologia

authors： MacDonald ZG,Anderson ID,Acorn JH,Nielsen SE

更新日期：2018-01-01 00:00:00

abstract：:In order to scale up from the ecophysiological characters of individual plants to population-level questions, we need to determine if character patterns in natural populations are stable through time, and if the characters are related to growth and survival. We investigated these questions in a 3-year study for one ch...

journal_title：Oecologia

authors： Donovan LA,Ehleringer JR

更新日期：1994-12-01 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：:Several studies have suggested that aquatic microcrustaceans are relatively efficient dispersers in a variety of landscapes, whereas others have indicated dispersal limitation at large spatial scales or under specific circumstances. Based on a survey of a set of recently created ponds in an area of approximately 18 × ...

journal_title：Oecologia

authors： Juračka PJ,Declerck SA,Vondrák D,Beran L,Černý M,Petrusek A

更新日期：2016-03-01 00:00:00

abstract：:The hypothesis that carnivorous plants are less responsive to prey at high soil nutrient levels than at lower levels (Givnish et al. 1984) is tested on four plant species (Drosera rotundifolia, Pinguicula alpina, P. villosa and P. vulgaris) from a subarctic environment. The response, measured in terms of seven charact...

journal_title：Oecologia

authors： Karlsson PS,Nordell KO,Carlsson BÅ,Svensson BM

更新日期：1991-03-01 00:00:00

abstract：:Most animals metamorphose, changing morphology, physiology, behavior and ecological interactions. Size- and habitat-dependent mortality risk is thought to affect the evolution and plastic expression of metamorphic timing, and high predation during the morphological transition is posited as a critical selective force s...

journal_title：Oecologia

authors： Touchon JC,Jiménez RR,Abinette SH,Vonesh JR,Warkentin KM

更新日期：2013-11-01 00:00:00

abstract：:Multiple regression analyses were made of the effect of food composition upon energetic efficiency and existence energy of House Sparrows, Passer domesticus. Protein content of experimental food is the most important of eleven independent variables tested in the prediction of energetic efficiency. Other variables sign...

journal_title：Oecologia

authors： Blem CR

更新日期：1976-09-01 00:00:00

abstract：:The theory that early successional plants and annual plants will be less well defended against generalist herbivores than later successional plants and perennial plants, because they avoid herbivores by escaping in space and time, is evaluated. The theory is not supported in the ecosystem examined. The correlation bet...

journal_title：Oecologia

authors： Otte D

更新日期：1975-06-01 00:00:00

abstract：:We investigated the effect of increased N-supply on productivity and potential litter decay rates of Carex species, which are the dominant vascular plant species in peatlands in the Netherlands. We hypothesized that: (1) under conditions of N-limited plant growth, increased N-supply will lead to increased productivity...

journal_title：Oecologia

authors： Aerts R,van Logtestijn R,van Staalduinen M,Toet S

更新日期：1995-12-01 00:00:00

abstract：:The effect of water immersion on the non-parasitic stages of Boophilus microplus were investigated both under laboratory and field conditions. Survival of engorged female ticks was influenced by their age and the temperature of the water. Eggs and larvae were more resistant to submerison than were engorged females and...

journal_title：Oecologia

authors： Sutherst RW

更新日期：1971-09-01 00:00:00

abstract：:Many animals have seasonally plastic diets to take advantage of seasonally abundant plant resources, such as fruit or nectar. Switches from insectivorous diets that are protein rich to fruits or nectar that are carbohydrate rich present physiological challenges, but are routinely done by insectivorous songbirds during...

journal_title：Oecologia

authors： Frick WF,Shipley JR,Kelly JF,Heady PA 3rd,Kay KM

更新日期：2014-01-01 00:00:00

abstract：:Adjustment of hydraulic architecture in response to environmental conditions was studied in two warm-desert sub-shrubs, Hymenoclea salsola and Ambrosia dumosa, both at the level of genetic adaptation along a climatic gradient and plastic response to immediate growth conditions. Individuals of both species originating ...

journal_title：Oecologia

authors： Comstock JP

更新日期：2000-10-01 00:00:00

abstract：:We investigated the effects of elevated CO2 (600 μl l-1 vs 350 μl l-1) and phosphorus supply (1 g P m-2 year-1 vs unfertilized) on intact monoliths from species-rich calcareous grassland in a greenhouse. Aboveground community dry mass remained almost unaffected by elevated CO2 in the first year (+6%, n.s.), but was si...

journal_title：Oecologia

authors： Stöcklin J,Schweizer K,Körner C

更新日期：1998-08-01 00:00:00

abstract：:Availability of light and water differs between tropical moist and dry forests, with typically higher understorey light levels and lower water availability in the latter. Therefore, growth trajectories of juvenile trees--those that have not attained the canopy--are likely governed by temporal fluctuations in light ava...

journal_title：Oecologia

authors： Brienen RJ,Zuidema PA,Martínez-Ramos M

更新日期：2010-06-01 00:00:00

abstract：:Understanding the factors that affect establishment success of new species in established communities requires the study of both the ability of new species to establish and community resistance. Spatial pattern of species within a community can affect plant performance by changing the outcome of inter-specific competi...

journal_title：Oecologia

authors： Thébault A,Stoll P,Buttler A

更新日期：2012-12-01 00:00:00