Nutritional status of Abies pinsapo forests along a nitrogen deposition gradient: do C/N/P stoichiometric shifts modify photosynthetic nutrient use efficiency?

abstract：:As primary producers, plants are known to influence higher trophic interactions by initiating food chains. However, as architects, plants may bypass consumers to directly affect predators with important but underappreciated trophic ramifications. Invasion of western North American grasslands by the perennial forb, spo...

journal_title：Oecologia

authors： Pearson DE

更新日期：2009-03-01 00:00:00

abstract：:We report the recovery of root nodules from P. glandulosa var. glandulosa in the eastern portion of its range, where the species reaches its greatest vegetational development. Single cores 4.7 cm in diameter and up to 250 cm deep yielded from 0 to over 250 nodules. Nodules were found at all depths below 10 cm, with th...

journal_title：Oecologia

authors： Johnson HB,Mayeux HS Jr

更新日期：1990-09-01 00:00:00

abstract：:The influence of ectoparasitic water mite larvae (Arrenurus) on the fluctuating asymmetry (FA) of forewing length and cell number in the foreweings of the damselfly Coenagrion puella has been investigated. We show a significant correlation between the FA of forewing length and the mite load. Most explanations for incr...

journal_title：Oecologia

authors： Bonn A,Gasse M,Rolff J,Martens A

更新日期：1996-12-01 00:00:00

abstract：:In mutualistic interactions, partners obtain a net benefit, but there may also be costs associated with the provision of benefits for a partner. The question of whether aphids suffer such costs when attended by ants has been raised in previous work. Transgenerational effects, where offspring phenotypes are adjusted ba...

journal_title：Oecologia

authors： Tegelaar K,Glinwood R,Pettersson J,Leimar O

更新日期：2013-11-01 00:00:00

abstract：:Tooth enamel apatite carbonate carbon and oxygen isotope ratios of modern kangaroos (Macropus spp.) collected on a 900-km latitudinal transect spanning a C(3)-C(4) transition zone were analysed to create a reference set for palaeoenvironmental reconstruction in southern Australia. The carbon isotope composition of ena...

journal_title：Oecologia

authors： Brookman TH,Ambrose SH

更新日期：2013-02-01 00:00:00

abstract：:Herbivores decrease plant fitness by consuming reproductive tissues, limiting resources, and/or affecting mutualisms. Although these mechanisms were extensively tested in chewing herbivores, the impact of other functional groups (e.g., sap-feeders) remains poorly understood. We investigated whether aphids affect plant...

journal_title：Oecologia

authors： Devegili AM,Chalcoff VR

更新日期：2020-11-01 00:00:00

abstract：:Host plant use and availability were determined in early nymphal and adult-stage Schistocerca emarginata (=lineata) (Orthoptera: Acrididae) populations at six localities in Texas, USA. Early instar nymphal populations were feeding almost exclusively on either Ptelea trifoliata (Rutaceae) or Rubus trivialis (Rosaceae)....

journal_title：Oecologia

authors： Sword GA,Dopman EB

更新日期：1999-08-01 00:00:00

abstract：:Frugivorous birds disperse the seeds of many fruit-bearing plants, but the fate of seeds after defecation or regurgitation is often unknown. Some rodents gather and scatter hoard seeds, and some of these may be overlooked, germinate, and establish plants. We show that these two disparate modes of seed dispersal are li...

journal_title：Oecologia

authors： Vander Wall SB,Kuhn KM,Gworek JR

更新日期：2005-09-01 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：:The life-cycle of the dominant brackish water ostracod Cyprideis torosa (Jones, 1850) has been studied during 4 years. The species has only one generation anually. Reproduction is fairly similar throughout the years and appears to be tuned in to temperature. The number of adults has one peak every year and can be desc...

journal_title：Oecologia

authors： Heip C

更新日期：1976-09-01 00:00:00

abstract：:This study links summer foraging and scatter-hoarding to winter larder-hoarding and winter survival in yellow pine chipmunks (Tamias amoenus) by comparing patterns of time allocation and winter larder contents in 2 years with very different levels of resource availability. In 2003, seed production and the number of tr...

journal_title：Oecologia

authors： Kuhn KM,Vander Wall SB

更新日期：2008-08-01 00:00:00

abstract：:The influence of ant attendance on parasitization of the larvae of three hawthorn psyllid species [Cacopsylla peregrina Förster, C. melanoneura Förster, C. crataegi (Schrank)] was studied over 2 years. All three psyllid species had low parasitization rates. However, the ant-attended C. crataegi was almost exclusively ...

journal_title：Oecologia

authors： Novak H

更新日期：1994-09-01 00:00:00

abstract：:Lizards may experience population declines and extinctions on a similar scale to that experienced by amphibians, and climate warming is one hypothesis proposed to explain these declines and extinctions. Within lizards, viviparous species are hypothesized to be more vulnerable to climate warming, because they have evol...

journal_title：Oecologia

authors： Wang Z,Ma L,Shao M,Ji X

更新日期：2017-12-01 00:00:00

abstract：:Several studies published over the last years suggest that the ability of many species to cope with global change will be closely related to the current amount of plasticity for fitness-related traits. Thus, disentangling general patterns in phenotypic flexibility, which could be then included in models aimed to predi...

journal_title：Oecologia

authors： Aguilar-Kirigin ÁJ,Naya DE

更新日期：2013-11-01 00:00:00

abstract：:Correlates of individual plant escape from seed predation were investigated for an East African population of the shrub Crotalaria pallida (Papilionaceae) in which seed mortality due to chewing insects is high and varies among neighboring individuals. Several plant properties expected to influence phytophagous insect ...

journal_title：Oecologia

authors： Moore LR

更新日期：1978-01-01 00:00:00

abstract：:Behavioral traits and diet were traditionally thought to be highly plastic within individuals. This view was espoused in the widespread use of optimality models, which broadly predict that individuals can modify behavioral traits and diet across ecological contexts to maximize fitness. Yet, research conducted over the...

journal_title：Oecologia

authors： Toscano BJ,Gownaris NJ,Heerhartz SM,Monaco CJ

更新日期：2016-09-01 00:00:00

abstract：:Global climate change is expected to affect terrestrial ecosystems in a variety of ways. Some of the more well-studied effects include the biogeochemical feedbacks to the climate system that can either increase or decrease the atmospheric load of greenhouse gases such as carbon dioxide and nitrous oxide. Less well-stu...

journal_title：Oecologia

authors： Butler SM,Melillo JM,Johnson JE,Mohan J,Steudler PA,Lux H,Burrows E,Smith RM,Vario CL,Scott L,Hill TD,Aponte N,Bowles F

更新日期：2012-03-01 00:00:00

abstract：:The life ofOncopeltus fasciatus centers on the seeds of milkweeds (Asclepiadaceae,Asclepias syriaca in this study). Adults reproduce prolifically on these seeds, but they engage in only half as much copulation and lay only a few eggs when fed milkweed buds and flowers instead. They can not maintain body weight on a di...

journal_title：Oecologia

authors： Ralph CP

更新日期：1976-06-01 00:00:00

abstract：:On a shallow sand flat at Princess Royal Harbour near Albany, Western Australia, the brown macrophyte Hormosira banksii attaches to shells of infaunal bivalves. Hormosira occupies shells of Katelysia rhytiphora in preference to K. scalarina. We proposed and tested four hypotheses to explain this host occupation patter...

journal_title：Oecologia

authors： Black R,Peterson CH

更新日期：1987-09-01 00:00:00

abstract：:The operative temperature of the environment was estimated for starlings using hollow, unheated taxidermic mounts. On average, adults foraging in full sun were characterized by shorter foraging bouts than those adults foraging in full shade. Simultaneous observations of air temperature, operative temperature, and the ...

journal_title：Oecologia

authors： Clark L

更新日期：1987-01-01 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：:Thirty-four species of marine macroalgae from around St. Andrews, Scotland, have been assayed for their external activity and thirty-three species for their total activity of carbonic anhydrase. Activity was detected in all the Rhodophyta tested apart from Chondrus crispus, but was absent in Codium fragile, Enteromorp...

journal_title：Oecologia

authors： Giordano M,Maberly SC

更新日期：1989-12-01 00:00:00

abstract：:We measured the response of dark respiration (R(d)) to temperature and foliage characteristics in the upper canopies of tree species in temperate rainforest communities in New Zealand along a soil chronosequence (six sites from 6 years to 120,000 years). The chronosequence provided a vegetation gradient characterised ...

journal_title：Oecologia

authors： Turnbull MH,Tissue DT,Griffin KL,Richardson SJ,Peltzer DA,Whitehead D

更新日期：2005-03-01 00:00:00

abstract：:Anuran amphibians have traditionally been considered suitable model organisms for community ecology studies. In this paper, we review and quantitatively re-analyze the original studies published on dietary relationships among anuran communities worldwide. We re-analyzed 33 independent communities from all continents, ...

journal_title：Oecologia

authors： Vignoli L,Luiselli L

更新日期：2012-06-01 00:00:00

abstract：:The photosynthetic pathways of 42 species of the genusEuphorbia growing wild, naturalized or cultivated in Egypt were investigated. The criteria used included the δ13C- and δD-values and Kranz anatomy of the leaves. There is a relationship between the photosynthetic pathway and the ecological conditions in the habitat...

journal_title：Oecologia

authors： Batanouny KH,Stichler W,Ziegler H

更新日期：1991-09-01 00:00:00

abstract：:During unusually wet years the salinity of the Great Salt Lake (Utah) decreased from above 100 g/L to 50 g/L. This allowed the predaceous insect Trichocorixa verticalis to invade the pelagic region of the lake and reach a mean summer density of 52/m3. Concurrent changes in the pelagic ecosystem were: a decrease in the...

journal_title：Oecologia

authors： Wurtsbaugh WA

更新日期：1992-02-01 00:00:00

abstract：:The factors that promote ecological separation among closely related sympatric carnivores in tropical forests are poorly understood due to a paucity of field studies. Here, we report on community-wide food resource utilization patterns among eight co-existing carnivores in the Dzanga-Sangha Reserve, Central African Re...

journal_title：Oecologia

authors： Ray J,Sunquist M

更新日期：2001-05-01 00:00:00

abstract：:Morphological relationships change with overall body size and body size often varies among populations. Therefore, quantitative analyses of individual traits from organisms in different populations or environments (e.g., in studies of phenotypic plasticity) often adjust for differences in body size to isolate changes ...

journal_title：Oecologia

authors： McCoy MW,Bolker BM,Osenberg CW,Miner BG,Vonesh JR

更新日期：2006-07-01 00:00:00

abstract：:CrowdedEpirrita larvae had shorter larval periods than, and similar pupal masses to, their solitary siblings when reared on low quality diets. When fed on high quality diets, pupal masses of crowded larvae were lower than in singletons, and there was no difference in larval period. Because changes in food availability...

journal_title：Oecologia

authors： Haukioja E,Pakarinen E,Niemelä P,Iso-Iivari L

更新日期：1988-05-01 00:00:00

abstract：:The possibility that resource limits constrain the growth of mobile epifaunal populations associated withSargassum patens plants was investigated by placing plants and associated animals into field microcosms which excluded fish predators, and then comparing faunal abundance and size-structure changes in different mic...

journal_title：Oecologia

authors： Edgar GJ,Aoki M

更新日期：1993-03-01 00:00:00