Nested bird and micro-habitat assemblages in a peatland archipelago.

abstract：:In 1989, 313 foraging flights of common terns in the Wadden Sea were radio-tracked. The feeding trips lasted on average 115 min covering about 30 km per flight. Completely tracked flights had a mean radius of 6.3 km. The terns preferred distinct foraging areas in the Wadden Sea. These were visited at site-specific pha...

journal_title：Oecologia

authors： Becker PH,Frank D,Sudmann SR

更新日期：1993-03-01 00:00:00

abstract：:We compare results of field study and model analysis of two butterfly populations to evaluate the importance of alternative mechanisms causing changes in abundance. Although understanding and predicting population fluctuations is a central goal of population ecology, it is not often achieved because long-term abundanc...

journal_title：Oecologia

authors： McLaughlin JF,Hellmann JJ,Boggs CL,Ehrlich PR

更新日期：2002-08-01 00:00:00

abstract：:Both top-down and bottom-up processes are common in terrestrial ecosystems, but how these opposing forces interact and vary over time is poorly understood. We tested the variation of these processes over seasonal time in a natural temperate zone grassland, a field site characterized by strong seasonal changes in abiot...

journal_title：Oecologia

authors： Boyer AG,Swearingen RE,Blaha MA,Fortson CT,Gremillion SK,Osborn KA,Moran MD

更新日期：2003-07-01 00:00:00

abstract：:The effect of feeding of the mirid bug Capsodes infuscatus on fruit production of the geophyte Asphodelus ramosus was studied in a desert area in Israel. Plant and bug densities and percent loss of fruit production were measured in a relatively dry lower colluvial slope, an intermediate upper colluvial slope, and a re...

journal_title：Oecologia

authors： Ayal Y,Izhaki I

更新日期：1993-04-01 00:00:00

abstract：:In many mammals, early survival differs between the sexes, with males proving the more fragile sex ["Fragile male (FM) hypothesis"], especially in sexually dimorphic species where males are the larger sex. Male-biased allocation (MBA) by females may offset this difference. Here, we evaluate support for the FM and MBA ...

journal_title：Oecologia

authors： Kraus C,Mueller B,Meise K,Piedrahita P,Pörschmann U,Trillmich F

更新日期：2013-04-01 00:00:00

abstract：:Abiotic drivers of environmental stress have been found to induce CAM expression (nocturnal carboxylation) in facultative CAM species such as Mesembryanthemum crystallinum. The role played by biotic factors such as competition with non-CAM species in affecting CAM expression, however, remains largely understudied. Thi...

journal_title：Oecologia

authors： Yu K,D'Odorico P,Li W,He Y

更新日期：2017-06-01 00:00:00

abstract：:Two primarily granivorous rodents of Old World deserts,Gerbillus allenbyi (mean adult body mass=26 g) andG. pyramidum (mean adult body mass=40 g), coexist in sandy habitats in the northwestern Negev desert. Both species are burrow dwellers and are nocturnal; however, in their overall distributions,G. pyramidum occurs ...

journal_title：Oecologia

authors： Degen AA,Pinshow B,Kam M

更新日期：1992-07-01 00:00:00

abstract：:In the simultaneously hermaphroditic marine fish, Serranus subligarius, male role individuals are known to pair spawn, group spawn and streak spawn. While the effects of these common mating tactics on mating success in the male role have been well studied, their consequences for the reproductive success of the individ...

journal_title：Oecologia

authors： Adreani MS

更新日期：2012-10-01 00:00:00

abstract：:Size thresholds commonly underlie the induction of alternative morphological states. However, the respective importance of absolute and relative size to such thresholds remains uncertain. If absolute size governs expression, morph frequency should differ among environments that influence absolute sizes (e.g. resources...

journal_title：Oecologia

authors： Moore MP,Pechmann JHK,Whiteman HH

更新日期：2020-08-01 00:00:00

abstract：:The life history of freshwater cladocerans such as Daphnia spp. is strongly affected by their environment. Factors such as temperature, food quantity and even the presence or absence of predators influence growth, reproduction and morphology of individuals. Recently, it has also become clear that the quality of the fo...

journal_title：Oecologia

authors： Seidendorf B,Meier N,Petrusek A,Boersma M,Streit B,Schwenk K

更新日期：2010-02-01 00:00:00

abstract：:Principal and reduced major axes, and Bulmer's (1975) tests have been suggested as methods for detecting the presence of density dependence in a series of population censuses that are unsuitable for analysis by alternative means e.g. by k-factor analysis. These alternative methods are tested using census data, some of...

journal_title：Oecologia

authors： Gaston KJ,Lawton JH

更新日期：1987-12-01 00:00:00

abstract：:Warming-induced nutrient enrichment in the Arctic may lead to shifts in leaf-level physiological properties and processes with potential consequences for plant community dynamics and ecosystem function. To explore the physiological responses of Arctic tundra vegetation to increasing nutrient availability, we examined ...

journal_title：Oecologia

authors： Prager CM,Boelman NT,Eitel JUH,Gersony JT,Greaves HE,Heskel MA,Magney TS,Menge DNL,Naeem S,Shen C,Vierling LA,Griffin KL

更新日期：2020-03-01 00:00:00

abstract：:The aim of our study was to identify interactions between the decomposition of aboveground litter and rhizosphere activity. The experimental approach combined the placement of labelled litter (delta13C=-37.9 per thousand ) with forest girdling in a 35-year-old Norway spruce stand, resulting in four different treatment...

journal_title：Oecologia

authors： Subke JA,Hahn V,Battipaglia G,Linder S,Buchmann N,Cotrufo MF

更新日期：2004-05-01 00:00:00

abstract：:The reproductive behaviour of the toad Bufo calamita was studied in a large population in the northern Rhineland, Germany. Toads bred at four spatially separated but neighbouring areas including 34 breeding ponds. Three methods were applied to monitor quantitatively the intensity of breeding and migratory activity: ca...

journal_title：Oecologia

authors： Sinsch U

更新日期：1988-08-01 00:00:00

abstract：:Analyses of carbon-assimilation patterns in response to intercellular CO2 concentrations, and the photosynthetic water-and nitrogen-use efficiencies, were conducted for a C3, a C4, and three C3-C4 species in the genus Flaveria in order to determine some of the advantages and disadvantages of C3-C4 intermediate photosy...

journal_title：Oecologia

authors： Monson RK

更新日期：1989-08-01 00:00:00

abstract：:Kinetic properties of NAD malate dehydrogenase (MDH) and glutamate oxaloacetate transaminase (GOT) were analyzed in two genotypes of Arabidopsis thaliana collected in two sites of contrasting climates. Plants from each genotype were acclimated under controlled conditions at four different thermoperiods: 5-10° C, 7-15°...

journal_title：Oecologia

authors： Simon JP,Potvin C,Blanchard MH

更新日期：1983-11-01 00:00:00

abstract：:We investigated the carbon supply status in species-rich mediterranean plant communities growing in a bowl-shaped 1-ha "CO2 spring" area near Sienna, Italy. A geothermic "lime-kiln" has provided these communities, for as long as historical records are available, with pure CO2 that mixes with ambient air at canopy leve...

journal_title：Oecologia

authors： Körner C,Miglietta F

更新日期：1994-09-01 00:00:00

abstract：:We evaluate the empirical and theoretical support for the hypothesis that a large proportion of native species richness is required to maximize ecosystem stability and sustain function. This assessment is important for conservation strategies because sustenance of ecosystem functions has been used as an argument for t...

journal_title：Oecologia

authors： Schwartz MW,Brigham CA,Hoeksema JD,Lyons KG,Mills MH,van Mantgem PJ

更新日期：2000-02-01 00:00:00

abstract：:We determined the water-soluble thiol (SH) content and the osmolality of the cell sap in spruce trees of both low- and high-altitude origin that were transplanted to two test areas at different altitudes (400 m and 1700 m). There was little or no significant difference in SH content and osmotic value between trees of ...

journal_title：Oecologia

authors： Grill D,Pfeifhofer H,Tschulik A,Hellig K,Holzer K

更新日期：1988-07-01 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

abstract：:1. In an attempt to evaluate the importance of individual daily habits to a freeliving animal, foraging behaviour of kestrels was observed continuously for days in sequence in open country. Data obtained in 2,942 observation hours were used. Flight-hunting was the prominent foraging technique yielding 76% of all prey ...

journal_title：Oecologia

authors： Rijnsdorp A,Daan S,Dijkstra C

更新日期：1981-09-01 00:00:00

abstract：:The impact of predation by the robber fly Proctacanthus milbertii Macquart on populations of adult grasshoppers from grasslands of the Nebraska sandhills was estimated. Densities of P. milbertii were estimated at 437 individuals per hectare (2 se=122). Overall densities of 23 species of grasshoppers were estimated to ...

journal_title：Oecologia

authors： Joern A,Rudd NT

更新日期：1982-10-01 00:00:00

abstract：:We examined the response of the birch tube-maker Acrobasis betulella Hulst (Lepidoptera: Pyralidae) to habitat patch isolation and edges. Density of A.␣betulella larva was higher on distant islands than on islands close to the shore. Following experimental removal of all larvae from the islands, adults were able to re...

journal_title：Oecologia

authors： Cappuccino N,Martin MA

更新日期：1997-03-01 00:00:00

abstract：:The central mudminnow (Umbra limi) and yellow perch (Perca flavescens) are two species of fishes that commonly co-occur in small bog lakes in the Great Lakes region of North America. Both species are dietary generalists with a high degree of dietary overlap, and perch populations have been shown to have a strong negat...

journal_title：Oecologia

authors： Paszkowski CA

更新日期：1985-05-01 00:00:00

abstract：:A traditional view of diverse floral traits is that they reflect differences in foraging preferences of pollinators. The role of pollinators in the evolution of floral traits has been questioned recently by broad community surveys, especially studies concerning variation in pollinator assemblages and visitation freque...

journal_title：Oecologia

authors： Gong YB,Huang SQ

更新日期：2011-07-01 00:00:00

abstract：:We used a complete block design to experimentally study direct and indirect interactions in a three trophic-level freshwater system consisting of a top predator, the green sunfish, Lepomis cyanellus, an intermediate predator, small-mouthed salamander larvae, Ambystoma barbouri, and prey, hatchling isopods, Lirceus fon...

journal_title：Oecologia

authors： Huang C,Sih A

更新日期：1991-02-01 00:00:00

abstract：:The percent of species of the Cyperaceae possessing the C4 pathway was calculated for twenty-five regions of North America. A stepwise multiple regression analysis was used to determine which climatic variables were most highly correlated with the percent C4 species among the various regions. The square of the mean Ju...

journal_title：Oecologia

authors： Teeri JA,Livingstone DA

更新日期：1980-12-01 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：:The mortality and physiological status (body water content) of Asellus aquaticus (Isopoda) and Gammarus pulex (Amphipoda) were measured after 25 days exposure in 20 natural streams with a pH range of 4.3-7.5 and a colour range of 8-280 mg Pt L-1. In addition, the effects of keeping the animals as single species or tog...

journal_title：Oecologia

authors： Hargeby A

更新日期：1990-03-01 00:00:00

abstract：:Interspecific hybridization is an important and common evolutionary mechanism, but field-based evaluations of changes in realized niches and zonation patterns of native and exotic hybrids relative to those of their parental plant species are rare. Would native hybrids forming hybrid zones between their parental specie...

journal_title：Oecologia

authors： Gallego-Tévar B,Curado G,Grewell BJ,Figueroa ME,Castillo JM

更新日期：2018-11-01 00:00:00