Modeling the dynamics of mountain pine beetle aggregation in a lodgepole pine stand.

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：:Predation by invasive species is a major threat to the persistence of naïve prey. Typically, this negative effect is addressed by suppressing the population size of the invasive predator to a point where the predation pressure does not hinder the viability of the prey. However, this type of intervention may not be eff...

journal_title：Oecologia

authors： García-Díaz P,Binny RN,Anderson DP

更新日期：2021-01-08 00:00:00

abstract：:Characterizing the causes of spatial and temporal variation in parasite-induced mortality under natural conditions is crucial to better understanding the factors driving host population dynamics. Our goal was to quantify this variation in the amphipod Paracalliope novizealandiae, a second intermediate host of the trem...

journal_title：Oecologia

authors： Bates AE,Poulin R,Lamare MD

更新日期：2010-07-01 00:00:00

abstract：:Large-scale ocean-atmosphere physical dynamics can have profound impacts on the structure and organization of marine ecosystems. These changes have been termed "regime shifts", and five different episodes have been detected in the North Pacific Ocean, with concurrent changes also occurring in the Bering and Beaufort S...

journal_title：Oecologia

authors： Luque SP,Ferguson SH

更新日期：2009-05-01 00:00:00

abstract：:(i) The growth of ca. 100 individuals of a small deciduous tree Euphorbia pyrifolia, of different ages and edaphic regimes, and with different levels of infestation by the coccid Icerya seychellarum, has been studied on Aldabra Atoll over two years (1976-1978). Infestation on leaves ranged between 0 and 1.3 mg dry wei...

journal_title：Oecologia

authors： Newbery DM

更新日期：1980-01-01 00:00:00

abstract：:Understanding the effects of invasive plants on native consumers is important because consumer-mediated indirect effects have the potential to alter the dynamics of coexistence in native communities. Invasive plants may promote changes in consumer pressure due to changes in protective cover (i.e., the architectural co...

journal_title：Oecologia

authors： Dutra HP,Barnett K,Reinhardt JR,Marquis RJ,Orrock JL

更新日期：2011-07-01 00:00:00

abstract：:Predator-prey interactions between small mammals and their avian and mammalian predators have attracted much attention. However, large-scale field experiments examining small-mammal antipredatory responses under the risk of predation by mammals are rare. As recently pointed out, the scale of experiments may cause misl...

journal_title：Oecologia

authors： Jonsson P,Koskela E,Mappes T

更新日期：2000-03-01 00:00:00

abstract：:No-take marine reserves (NTMRs) provide hope that local carrying capacity may be partially restored if reserves are protected long enough. How long is long enough? We assess the duration of protection required for populations of large predatory reef fish in marine reserves to attain new steady states. We monitored bio...

journal_title：Oecologia

authors： Russ GR,Alcala AC

更新日期：2010-08-01 00:00:00

abstract：:In this paper we test three plant species for the inducibility of their alkaloid production. The plants were heavily damaged by cutting off 50% of their leaf surface using a pair of scissors. The cut-off leaf tips were used as controls for possible diurnal fluctuations. After 3, 6, 12, 24 and 48 h, respectively, the l...

journal_title：Oecologia

authors： van Dam NM,van der Meijden E,Verpoorte R

更新日期：1993-09-01 00:00:00

abstract：:We used field and mesocosm experiments to measure effects of southern redbelly dace (Phoxinus erythrogaster), a grazing minnow, on stream ecosystem structure and function. Ecosystem structure was quantified as algal filament length, algal biomass, size distribution of particulate organic matter (POM), algal assemblage...

journal_title：Oecologia

authors： Bertrand KN,Gido KB

更新日期：2007-02-01 00:00:00

abstract：:The photosynthetic incorporation of H14CO3- by the alga Platymonas subcordiformis decreased with increasing concentrations of NaCl in the medium. There was no correlation between the response of P. subcordiformis to salinity in high or low NaCl-concentrations in the growing solution. When other osmotic substances were...

journal_title：Oecologia

authors： Kirst GO

更新日期：1975-09-01 00:00:00

abstract：:Models of the evolution of seed dormancy reveal that dormancy is favoured either when opportunities for establishment vary over time and when there is wide variation in the probability of success, or when the probability of success is limited by frequency dependence. Empirical evidence supporting the temporal heteroge...

journal_title：Oecologia

authors： Zammit C,Zedler PH

更新日期：1990-08-01 00:00:00

abstract：:The respiratory physiology of four species of Australian desert-dwelling beetle was examined using a flow-through respirometry system over the temperature range of 20-40°C. The two species of tenebrionid beetles (Heleus waitei and Pterohelaeus sp.) did not exhibit the discontinuous gas exchange cycles (DGC), a mechani...

journal_title：Oecologia

authors： Duncan FD,Dickman CR

更新日期：2001-12-01 00:00:00

abstract：:Naïveté can occur within any novel antagonistic interaction, and competitive forces play a fundamental role in shaping community structure, yet competitive naïveté has received very little attention in the literature to date. Naïveté towards a novel competitor is unlikely to result in immediate mortality, but could po...

journal_title：Oecologia

authors： Heavener SJ,Carthey AJ,Banks PB

更新日期：2014-05-01 00:00:00

abstract：:More than 500 species of the Poaceae are found in Kenya, East Africa. Eighteen of twenty-seven tribes are exclusively (except the Paniceae and Danthonieae) of the C3 photosynthetic type. A floristic analysis of low altitude grasslands suggests that nearly all species at these low altitudes are of the C4 photosynthetic...

journal_title：Oecologia

authors： Tieszen LL,Senyimba MM,Imbamba SK,Troughton JH

更新日期：1979-01-01 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：:Global changes interact with plant invasions by differentially impacting native and invasive species. For example, invasive plants often benefit from eutrophication to a greater degree than native plants. While this is well-documented, a broad, trait-based explanation for this phenomenon is lacking. Recent research sh...

journal_title：Oecologia

authors： Harvey JT,Leffler AJ

更新日期：2020-08-01 00:00:00

abstract：:Pea aphids have several alternative responses to the detection of alarm pheromone produced by conspecifics. One of these, dropping from the feeding site to the ground, is potentially costly owing to the risk of desiccation-induced mortality on the ground before another host plant can be reached. Both dropping and walk...

journal_title：Oecologia

authors： Dill LM,Fraser AH,Roitberg BD

更新日期：1990-07-01 00:00:00

abstract：: Habitat fragmentation is becoming increasingly common, yet, the effect of habitat spatial structure on population dynamics remains undetermined for most species. Populations of a single species found in fragmented and nonfragmented habitat present a rare opportunity to examine the effect of habitat spatial structure ...

journal_title：Oecologia

authors： Peacock MM,Smith AT

更新日期：1997-11-01 00:00:00

abstract：:Nitrogen deposition in the northeastern US changed N availability in the latter part of the twentieth century, with potential legacy effects. However, long-term N cycle measurements are scarce. N isotopes in tree rings have been used as an indicator of N availability through time, but there is little verification of w...

journal_title：Oecologia

authors： Burnham MB,Adams MB,Peterjohn WT

更新日期：2019-12-01 00:00:00

abstract：:Theoretical predictions from a simulation model of insect distributions and dispersal among isolated food plants have been tested with data gathered from 13 Cinnabar moth populations. Agreement with the predictions was good. Egg batch size was equal to or slightly larger than the number which could be supported by the...

journal_title：Oecologia

authors： Myers JH,Campbell BJ

更新日期：1976-03-01 00:00:00

abstract：:Wire cages with different-sized meshes were placed on trunks and around leaves at different heights in oak trees and in forest litter. Gypsy moth, Lymantria dispar, instars II-V tethered with threads were placed in each cage (instars II-III only in leaf cages) as well as outside the cages. Predation of larvae decrease...

journal_title：Oecologia

authors： Weseloh RM

更新日期：1988-11-01 00:00:00

abstract：:The diurnal periodicity of emergence of several stonefly and mayfly species was studied on the shore of lake Mondsee, Austria. Nemoura cinerea (Plecoptera) emerges during the whole day with peaks in the morning and afternoon. The Ephemeroptera Leptophlebia marginata, Ephemera danica and Centroptilum luteolum emerge as...

journal_title：Oecologia

authors： Thomas E

更新日期：1969-08-01 00:00:00

abstract：:Mating durations of copepods were found to differ significantly between fishless high-altitude waters and lowland lakes containing fish. In lowland species the whole mating process was completed within a few minutes, but it averaged over an hour in high-altitude species. Alpine copepods showed a prolonged post-copulat...

journal_title：Oecologia

authors： Jersabek CD,Luger MS,Schabetsberger R,Grill S,Strickler JR

更新日期：2007-09-01 00:00:00

abstract：:One of the most commonly cited hypotheses explaining invasion success is the enemy release hypothesis (ERH), which maintains that populations are regulated by coevolved natural enemies where they are native but are relieved of this pressure in the new range. However, the role of resident enemies in plant invasion rema...

journal_title：Oecologia

authors： Bohl Stricker K,Stiling P

更新日期：2014-03-01 00:00:00

abstract：:Plant isoprene emissions are known to contribute to abiotic stress tolerance, especially during episodes of high temperature and drought, and during cellular oxidative stress. Recent studies have shown that genetic transformations to add or remove isoprene emissions cause a cascade of cellular modifications that inclu...

journal_title：Oecologia

authors： Monson RK,Weraduwage SM,Rosenkranz M,Schnitzler JP,Sharkey TD

更新日期：2021-01-08 00:00:00

abstract：:Arthropods and pathogens damage leaves in natural ecosystems and may reduce photosynthesis at some distance away from directly injured tissue. We quantified the indirect effects of naturally occurring biotic damage on leaf-level photosystem II operating efficiency (Phi(PSII)) of 11 understory hardwood tree species usi...

journal_title：Oecologia

authors： Aldea M,Hamilton JG,Resti JP,Zangerl AR,Berenbaum MR,Frank TD,Delucia EH

更新日期：2006-08-01 00:00:00

abstract：:Seasonal changes in the photosynthetic characteristics of intact involucral leaves of Anemone raddeana were investigated under laboratory conditions. Net photosynthesis and constant water vapor pressure deficit showed almost the same seasonal trend. They increased rapidly from mid-April immediately after unfolding of ...

journal_title：Oecologia

authors： Yoshie F,Yoshida S

更新日期：1987-05-01 00:00:00

abstract：:Water and nitrogen (N) interact to influence soil N cycling and plant N acquisition. We studied indices of soil N availability and acquisition by woody plant taxa with distinct nutritional specialisations along a north Australian rainfall gradient from monsoonal savanna (1,600-1,300 mm annual rainfall) to semi-arid wo...

journal_title：Oecologia

authors： Soper FM,Richards AE,Siddique I,Aidar MP,Cook GD,Hutley LB,Robinson N,Schmidt S

更新日期：2015-05-01 00:00:00

abstract：:Leptopterna dolobrata (L.) (Holarctis) and Calocoris roseomaculatus (De Geer) (Palaearctis) are single-brooded in the whole range of their distribution and hibernate in the egg stage. Both species are active only for 21/2 months, while the egg stage lasts over 9 months.The main food plants of Leptopterna are Dactylis ...

journal_title：Oecologia

authors： Braune HJ

更新日期：1971-09-01 00:00:00