Predation by the isopod Saduria entomon on the amphipods Monoporeia affinis and Pontoporeia femorata: experiments on prey vulnerability.

abstract：:Plant resistance and tolerance to herbivores, parasites, pathogens, and abiotic factors may involve two types of costs. First, resistance and tolerance may be costly in terms of plant fitness. Second, resistance and tolerance to multiple enemies may involve ecological trade-offs. Our study species, the stinging nettle...

journal_title：Oecologia

authors： Puustinen S,Koskela T,Mutikainen P

更新日期：2004-03-01 00:00:00

abstract：:Seasonal and nutritionally induced changes of whole body protein metabolism have been studied in 45 to 57 mm shell-length Mytilus edulis from Whitsand Bay, southwest England. The subtraction of measured net protein balances from coincident rates of protein synthesis, determined in vivo by supplying 15N-labelled alga a...

journal_title：Oecologia

authors： Hawkins AJ

更新日期：1985-04-01 00:00:00

abstract：:Atmospheric inputs of N and S in bulk deposition (open collectors) and throughfall (beneath canopy collectors) were measured in and adjacent to two Class 1 wilderness areas of the northeastern US. In general, atmospheric S inputs followed our expectations with throughfall S fluxes increasing with elevation in the Whit...

journal_title：Oecologia

authors： Templer PH,Weathers KC,Lindsey A,Lenoir K,Scott L

更新日期：2015-01-01 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

abstract：:Recent work suggests that soil nutrient heterogeneity may modulate plant responses to drivers of global change, but interactions between N heterogeneity and changes in rainfall regime remain poorly understood. We used a model grassland system to investigate the interactive effects of N application pattern (homogeneous...

journal_title：Oecologia

authors： Xi N,Carrère P,Bloor JM

更新日期：2015-06-01 00:00:00

abstract：:There is an increasing ecological interest in understanding the gradients in H(2)(18)O enrichment in leaf water (i.e. a Péclet effect), because an appreciation of the significance of the Péclet effect is important for improving our understanding of the mechanistic processes affecting the (18)O composition of leaf wate...

journal_title：Oecologia

authors： Barbour MM,Roden JS,Farquhar GD,Ehleringer JR

更新日期：2004-02-01 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：:Ovipositing females of the cynipid waspPseudeucoila bochei discriminate between parasitized and unparasitized hosts, which results in a far more uniform distribution of eggs over the hosts than would be obtained if oviposition were random (Fig. 1,a 0-f 0).For the description of the distributions a few models were work...

journal_title：Oecologia

authors： Bakker K,Eijsackers HJ,van Lenteren JC,Meelis E

更新日期：1972-03-01 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：:Carbon dioxide exchange patterns of prickly-pear cactus (Opuntia phaeacantha var. discata) were studied throughout the year to determine temperature influences on and seasonal responses of the process. Cacti exhibit CAM which permits nighttime carboxylation of CO2 to malate and daytime decarboxylation of malate to CO2...

journal_title：Oecologia

authors： Nisbet RA,Patten DT

更新日期：1974-12-01 00:00:00

abstract：:Gas exchange characteristics of droughted and rewatered Portulacaria afra were studied during the seasonal shift from CAM to C3 photosynthesis. 14CO2 uptake, stomatal conductance, and total titratable acidity were determined for both irrigated and 2, 4, and 7.5 month waterstressed plants from summer 1984 to summer 198...

journal_title：Oecologia

authors： Guralnick LJ,Ting IP

更新日期：1986-08-01 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：:The parasitoids known to attack 191 phytophagous species of gall midges (Cecidomyiidae) were used to examine factors influencing parasitoid assemblage size. The number of parasitoid species a midge species supports was tested against nine variables describing geographical, biological and ecological attributes of hosts...

journal_title：Oecologia

authors： Hawkins BA,Gagné RJ

更新日期：1989-10-01 00:00:00

abstract：:Fourteen genotypes (varieties) of soybean (Glycine max) were screened for levels of induced resistance to Mexican bean beetle (Epilachna varivestis) damage, and a subset of 6 of those varieties was screened for levels of constitutive resistance to Mexican bean beetles. Experiments were carried out in the greenhouse, w...

journal_title：Oecologia

authors： Underwood N,Morris W,Gross K,Lockwood Iii JR

更新日期：2000-01-01 00:00:00

abstract：:Not all hosts, communities or environments are equally hospitable for parasites. Direct and indirect interactions between parasites and their predators, competitors and the environment can influence variability in host exposure, susceptibility and subsequent infection, and these influences may vary across spatial scal...

journal_title：Oecologia

authors： Gehman AM,Grabowski JH,Hughes AR,Kimbro DL,Piehler MF,Byers JE

更新日期：2017-01-01 00:00:00

abstract：:Honeybees (Apis mellifera) and bumblebees (Bombus spp.) often undergo exploitative competition for shared floral resources, which can alter their foraging behaviour and flower choice, even causing competitive exclusion. This may be strongest in summer, when foraging conditions are most challenging for bees, compared t...

journal_title：Oecologia

authors： Wignall VR,Campbell Harry I,Davies NL,Kenny SD,McMinn JK,Ratnieks FLW

更新日期：2020-02-01 00:00:00

abstract：:Climate change due to greenhouse gas emissions is predicted to raise the mean global temperature by 1.0-3.5°C in the next 50-100 years. The direct and indirect effects of this potential increase in temperature on terrestrial ecosystems and ecosystem processes are likely to be complex and highly varied in time and spac...

journal_title：Oecologia

authors： Rustad L,Campbell J,Marion G,Norby R,Mitchell M,Hartley A,Cornelissen J,Gurevitch J,GCTE-NEWS.

更新日期：2001-02-01 00:00:00

abstract：:The frequency of extreme warm years is increasing across the majority of the planet. Shifts in plant phenology in response to extreme years can influence plant survival, productivity, and synchrony with pollinators/herbivores. Despite extensive work on plant phenological responses to climate change, little is known ab...

journal_title：Oecologia

authors： Carter JM,Orive ME,Gerhart LM,Stern JH,Marchin RM,Nagel J,Ward JK

更新日期：2017-04-01 00:00:00

abstract：:Leaves of birch (Betula pendula Roth) and sycamore (Acer pseudoplatanus L.) were initiated and grown either in a simulated shadelight (80 μmol m-2 s-1, R/FR ratio 0.28)/dark photoenvironment or a white light (250 μmol m-2 s-1, R/FR>1)/dark photoenvironment. Until the leaves were more than 50% expanded, growth rates (m...

journal_title：Oecologia

authors： Taylor G,Davies WJ

更新日期：1986-07-01 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：:The definition of photosynthetically active radiation (Q) as the visible waveband (λ 400-700 nm) is a core assumption of much of modern plant biology and global models of carbon and water fluxes. On the other hand, much research has focused on potential mutation and damage to leaves caused by ultraviolet (UV) radiatio...

journal_title：Oecologia

authors： Turnbull TL,Barlow AM,Adams MA

更新日期：2013-10-01 00:00:00

abstract：:In common with samples from less taxonomically constrained studies, significant correlations exist between the numbers of predatory and non-predatory species in assemblages of terrestrial beetles. Under logarithmic transformation the relationship can be described reasonably well by a straight line. Explanations for pr...

journal_title：Oecologia

authors： Gaston KJ,Warren PH,Hammond PM

更新日期：1992-06-01 00:00:00

abstract：:Studies on iron reduction and the mechanism of gley formation by nitrogen-fixing clostridia are reported. Up to 106 cells/g soil of anaerobic, nitrogen-fixing clostridia, capable of reducing iron (III)-oxide, were counted in samples taken from various top soils. In a gleyed subsoil as many as 105 bacteria per g soil, ...

journal_title：Oecologia

authors： Ottow JC

更新日期：1971-01-01 00:00:00

abstract：:Fluorescent probes have been applied to study by epifluorescence microscopy interactions between species in an Anabaena flos-aquae association, derived from a freshwater community. Glycoconjugates (macromolecules containing carbohydrate residues) have been shown to play a vital role in recognition processes and in for...

journal_title：Oecologia

authors： Müller U,Sengbusch PV

更新日期：1983-05-01 00:00:00

abstract：:Our field observations on submersed macrophytes in the littoral zone of Cayuga Lake, N.Y., USA indicate that the shift in dominance from Myriophyllum spicatum L. to Elodea canadensis Michx. may be explained by the high abundance of an aquatic lepidopteran larva, Acentria ephemerella Denis & Schiffermüller. Experimenta...

journal_title：Oecologia

authors： Gross EM,Johnson RL,Hairston NG Jr

更新日期：2001-03-01 00:00:00

abstract：:Food density, degree of hunger prior to foraging, and food processing difficulty were varied in order to determine their effects on the diet diversity of captive Peromyscus leucopus foraging for buried seeds. No relationship was found between diet diversity and food density. However, diet diversity exhibited a signifi...

journal_title：Oecologia

authors： Ebersole JP,Wilson JC

更新日期：1980-07-01 00:00:00

abstract：:Provenance translocations of tree species are promoted in forestry, conservation, and restoration in response to global climate change. While this option is driven by adaptive considerations, less is known of the effects translocations can have on dependent communities. We investigated the relative importance and cons...

journal_title：Oecologia

authors： Gosney BJ,Potts BM,Forster LG,Whiteley C,O'Reilly-Wapstra JM

更新日期：2021-01-20 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：: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：:Regeneration methods for coastal sage srub vegetation after fire were studied in the coastal Santa Monica Mountains of southern California. Six sites were sampled two years after a large fire of fall, 1978. The intensity of fire varied. Foliar cover and flowering incidence were recorded for individuals regenerating by...

journal_title：Oecologia

authors： Malanson GP,O'Leary JF

更新日期：1982-06-01 00:00:00