Does vegetation complexity affect host plant chemistry, and thus multitrophic interactions, in a human-altered landscape?

abstract：:The size of forest fragments, the use of land bordering fragments, and the distance of nests from an edge all affect the frequency of predation upon bird nests in Maine (USA), an area where the forest has been fragmented by roads, but not significantly reduced in area. We placed artificial nests containing quail eggs ...

journal_title：Oecologia

authors： Small MF,Hunter ML

更新日期：1988-06-01 00:00:00

abstract：:Mature male parr successfully fertilized eggs of anadromous female Atlantic salmon, Salmo salar, in competition with anadromous males under simulated natural conditions. Mating situations were created in which mature male parr and anadromous males competing for the opportunity to spawn with an anadromous female differ...

journal_title：Oecologia

authors： Hutchings JA,Myers RA

更新日期：1988-03-01 00:00:00

abstract：:Estuarine assemblages of fishes and natant decapod crustaceans (i.e. nekton) comprise both permanent resident species and juveniles of coastal marine species that use estuaries primarily as nurseries. In an attempt to understand how the young of marine species successfully invade communities of permanent estuarine res...

journal_title：Oecologia

authors： Kneib RT,Knowlton MK

更新日期：1995-09-01 00:00:00

abstract：:We assessed the combined effects of varying the relative density and the relative floral morphological complexity of plant species on the behaviour of their bumblebee pollinators. Three species of bumblebee (Bombus pascuorum, B. terrestris and B. hortorum) were observed foraging on experimental arrays consisting of pa...

journal_title：Oecologia

authors： Stout JC,Allen JA,Goulson D

更新日期：1998-12-01 00:00:00

abstract：:Across latitudinal clines, the juvenile developmental rates of ectotherms often covary with the length of the growing season, due to life-history trade-offs imposed by the time-constrained environments. However, as the start of the growing season often varies substantially across years, adaptive parental effects on ju...

journal_title：Oecologia

authors： Rowiński PK,Laurila A,Gotthard K,Sowersby W,Lind MI,Richter-Boix A,Eckerström-Liedholm S,Rogell B

更新日期：2020-04-01 00:00:00

abstract：:Long-term fertilization of acidic tussock tundra has led to changes in plant species composition, increases in aboveground production and biomass and substantial losses of soil organic carbon (SOC). Root litter is an important input to SOC pools, although little is known about fine root demography in tussock tundra. I...

journal_title：Oecologia

authors： Sullivan PF,Sommerkorn M,Rueth HM,Nadelhoffer KJ,Shaver GR,Welker JM

更新日期：2007-09-01 00:00:00

abstract：:Debate on the control of population dynamics in reef fishes has centred on whether patterns in abundance are determined by the supply of planktonic recruits, or by post-recruitment processes. Recruitment limitation implies little or no regulation of the reef-associated population, and is supported by several experimen...

journal_title：Oecologia

authors： Forrester GE

更新日期：1995-08-01 00:00:00

abstract：:Endozoochory plays a prominent role for the dispersal of seed plants, and dispersal vectors are well known. However, for taxa such as ferns and bryophytes, endozoochory has only been suggested anecdotally but never tested in controlled experiments. We fed fertile leaflets of three ferns and capsules of four bryophyte ...

journal_title：Oecologia

authors： Boch S,Berlinger M,Fischer M,Knop E,Nentwig W,Türke M,Prati D

更新日期：2013-07-01 00:00:00

abstract：:Our understanding of the response of vascular, terrestrial plants to nitrogen (N) addition is advanced and provides the foundation for modern agriculture. In comparison, information on responses of marine macroalgae to increased nitrogen is far less developed. We investigated how in situ pulses of nitrate (NO3 (-)) af...

journal_title：Oecologia

authors： Stephens TA,Hepburn CD

更新日期：2016-09-01 00:00:00

abstract：:Larval digenetic trematodes commonly castrate their first intermediate hosts, and should therefore impose strong selection on the timing and mode of host reproduction. Here we examine spatial variation in infection by trematodes in the freshwater snail Potamopyrgus antipodarum. Snails were collected at 11 different si...

journal_title：Oecologia

authors： Jokela J,Lively CM

更新日期：1995-09-01 00:00:00

abstract：:Wildfire severity in forests is projected to increase with warming and drying conditions associated with climate change. Our objective was to determine the impact of wildfire and clearcutting severity on the ectomycorrhizal fungal (EMF) community of Douglas-fir seedlings in the dry forests of interior British Columbia...

journal_title：Oecologia

authors： Barker JS,Simard SW,Jones MD,Durall DM

更新日期：2013-08-01 00:00:00

abstract：:At Bakers Hill, differential winter mortality of juvenile slowgrowing Amphibolurus ornatus is correlated with the incidence of frosts (Bradshaw, 1971). The present study shows that the probability an individual will spend the night in a refuge that is safe from the lethal effect of a frost is directly related to the i...

journal_title：Oecologia

authors： Baverstock PR

更新日期：1978-01-01 00:00:00

abstract：:Lemming populations are generally characterised by their cyclic nature, yet empirical data to support this are lacking for most species, largely because of the time and expense necessary to collect long-term population data. In this study we use the relative frequency of yearly willow scarring by lemmings as an index ...

journal_title：Oecologia

authors： Predavec M,Krebs CJ,Danell K,Hyndman R

更新日期：2001-01-01 00:00:00

abstract：:Eriophorum vaginatum is a characteristic species of northern peatlands and a keystone plant for cutover bog restoration. Understanding the factors affecting E. vaginatum seedling establishment (i.e. growth dynamics and allocation) under global change has practical implications for the management of abandoned mined bog...

journal_title：Oecologia

authors： Siegenthaler A,Buttler A,Grosvernier P,Gobat JM,Nilsson MB,Mitchell EA

更新日期：2013-02-01 00:00:00

abstract：:1. It was clarified, by means of breeding experiments conducted within a temperature range of 14-34°C, if the growth of Pieris influenced by diurnally fluctuating temperatures depends on a simple additive influence of day-and-night-temperatures or if its growth is accelerated or retarded under these conditions by spec...

journal_title：Oecologia

authors： Neumann D,Heimbach F

更新日期：1975-06-01 00:00:00

abstract：:Energy limitation has long been the primary assumption underlying conceptual models of evolutionary and ecological processes in cave ecosystems. However, the prediction that cave communities are actually energy-limited in the sense that constituent populations are consuming all or most of their resource supply is unte...

journal_title：Oecologia

authors： Venarsky MP,Huntsman BM,Huryn AD,Benstead JP,Kuhajda BR

更新日期：2014-11-01 00:00:00

abstract：:We tested the existence of general patterns in the photosynthetic metabolism of oxygen-evolving organisms, based on a compilation of data for 315 species ranging from cyanobacteria to tree leaves. We used thickness and chlorophyll a concentration of the photosynthetic structure (cell, thallus, leaf) to scale differenc...

journal_title：Oecologia

authors： Enríquez S,Duarte CM,Sand-Jensen K,Nielsen SL

更新日期：1996-10-01 00:00:00

abstract：:Predawn water potential of representative plant species, together with stable isotope composition of stem water and potential water sources were investigated in four low-elevation tropical hardwood hammocks in the Lower Florida Keys, during a one year period. Hammock species had the lowest water potentials when soil w...

journal_title：Oecologia

authors： Ish-Shalom N,Sternberg LD,Ross M,O'Brien J,Flynn L

更新日期：1992-10-01 00:00:00

abstract：:Macoma balthica (L.) is a common clam of the estuarine seafloor, belonging to an important group of invertebrates possessing the capacity to choose between the two fundamental modes of feeding available, using its siphon to inhale either suspended food particles from the water or food particles deposited on the sedime...

journal_title：Oecologia

authors： Skilleter GA,Peterson CH

更新日期：1994-12-01 00:00:00

abstract：:Carbon isotope ratios, photosynthesis, and transpiration were measured on a xylem-tapping mistletoe (Phoradendron juniperinum) and its host (Juniperus osteosperma) in southern Utah, USA. For host tissues, the carbon isotope ratios agreed with theoretical values predicted from gas exchange observations. However, for mi...

journal_title：Oecologia

authors： Marshall JD,Ehleringer JR

更新日期：1990-09-01 00:00:00

abstract：:(1) The growth response of two Daphnia species coexisting in Lake Constance to constant and fluctuating conditions of temperature and food was tested in a flowthrough system. (2) In the lake D. hyalina exhibits a pronounced diurnal pattern of vertical migration, whereas D. galeata stays near the surface. The experimen...

journal_title：Oecologia

authors： Stich HB,Lampert W

更新日期：1984-02-01 00:00:00

abstract：:Senecio vulgaris from ruderal habitats may colonise crop fields and persist in the new environment. Persistence may occur through phenotypic plasticity or genetic differentiation. In the presence of genetic variation, differential responses of life history traits to selection may lead to local adaptation. A reciprocal...

journal_title：Oecologia

authors： Leiss KA,Müller-Schärer H

更新日期：2001-07-01 00:00:00

abstract：:Physiological responses to elevated CO2 at the leaf and canopy-level were studied in an intact pine (Pinus taeda) forest ecosystem exposed to elevated CO2 using a free-air CO2 enrichment (FACE) technique. Normalized canopy water-use of trees exposed to elevated CO2 over an 8-day exposure period was similar to that of ...

journal_title：Oecologia

authors： Ellsworth DS,Oren R,Huang C,Phillips N,Hendrey GR

更新日期：1995-10-01 00:00:00

abstract：:Stable carbon isotope techniques were employed to study the food habits of the termite Macrotermes michaelseni (Isoptera: Termitidae) in a semiarid savanna habitat in Kenya. At Kajiado this species utilized approximately 70% herbaceous vegetation (mostly grass) and 30% woody vegetation, while at Ruiru approximately 64...

journal_title：Oecologia

authors： Boutton TW,Arshad MA,Tieszen LL

更新日期：1983-08-01 00:00:00

abstract：:The decision how to allocate marginal resources to reproduction and growth can have important effects on associated life-history parameters as well as on population dynamics. In addition to showing variation among individuals in a population, such allocation rules may be either condition-dependent or fixed in differen...

journal_title：Oecologia

authors： Lardner B,Loman J

更新日期：2003-12-01 00:00:00

abstract：:The validity of nutrient use efficiency as a central concept in ecosystem ecology has recently been subject to challenge based upon arguments over autocorrelation of data, interpretation of graphical approaches, and appropriate statistical analyses. Much of the confusion on the measurement and interpretation of nutrie...

journal_title：Oecologia

authors： Pastor J,Bridgham SD

更新日期：1999-01-01 00:00:00

abstract：:The identification of potential competitors has been driven by the concept of limiting similarity. Lacking are explicit tests of interaction strength among morphologically similar and dissimilar species. I used the mottled sculpin, Cottus bairdi, as a focal species in an artificial stream experiment designed to compar...

journal_title：Oecologia

authors： Resetarits WJ Jr

更新日期：1995-09-01 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：:Leaf-chewing herbivores select food with a protein/carbohydrate ratio of 0.8-1.5, whereas phloem sap, which aphids feed on, has a ratio of approximately 0.1. Enhanced N fertilization increases the amino acid concentration in phloem sap and elevates the N/C ratio. The study examines: (1) whether aphids select between p...

journal_title：Oecologia

authors： Nowak H,Komor E

更新日期：2010-08-01 00:00:00

abstract：:We describe differences in senescence among populations of grasshoppers that occur along an altitudinal gradient in the Sierra Nevada, California. Experimental males from five populations of the Melanoplus sanguinipes/devastator sibling species complex were reared in each of two thermal culture conditions from eggs of...

journal_title：Oecologia

authors： Tatar M,Gray DW,Carey JR

更新日期：1997-07-01 00:00:00