Clouds homogenize shoot temperatures, transpiration, and photosynthesis within crowns of Abies fraseri (Pursh.) Poiret.

abstract：:Atriplex sagittata is a heterocarpic species producing three types of fruits which differ in morphology and ecological properties. This study focused on variation in biomass allocation into particular fruit types under different density and fertilization levels. The reduction in total weight under stressful conditions...

journal_title：Oecologia

authors： Mandák B,Pyšek P

更新日期：1999-04-01 00:00:00

abstract：:The dispersal of an endangered beetle, Osmoderma eremita, that lives in tree hollows, was studied by mark-release-recapture with pitfall traps. As only a small proportion of all dispersals is observed by this method, a simulation model was constructed to estimate the dispersal rate per individual. The model results su...

journal_title：Oecologia

authors： Ranius T,Hedin J

更新日期：2001-02-01 00:00:00

abstract：:Studies of predation by roach (Rutilus rutilus) on zebra mussel (Dreissena polymorpha) in a large, eutrophic lake showed that there was a clearly marked size threshold (∼ 160 mm SL) above which roach began to feed on mussels. Roach preying on various sizes of mussels selected them in proportions different from their a...

journal_title：Oecologia

authors： Prejs A,Lewandowski K,Stańczykowska-Piotrowska A

更新日期：1990-06-01 00:00:00

abstract：:Direct and interactive effects of daylength and temperature preconditioning of above- and below-ground parts of Chrysanthemum morifolium Ramat. 'Astrid' are examined in relation to net photosynthesis. Most previous work on thermal preconditioning has concentrated on the effects of a given thermal regime on entire plan...

journal_title：Oecologia

authors： Adams MS,Fayyaz MM

更新日期：1979-01-01 00:00:00

abstract：:Small marine invertebrates often use sessile organisms as microhabitats, which can provide food sources and/or serve as refugees from predators. Because of the availability of external food items such as epibionts and detritus in the marine environment, these invertebrates may not depend on the sessile organisms as so...

journal_title：Oecologia

authors： Kumagai NH

更新日期：2008-04-01 00:00:00

abstract：:The compensatory growth potential of a grazed fungal biomass was mathematically expressed as a function of patchiness in its distribution and demonstrated in an experiment using the fungivorous collembolan Onychiurus armatus and the soil fungi Verticillium bulbillosum and Penicillium spinulosum. The model addresses th...

journal_title：Oecologia

authors： Bengtsson G,Hedlund K,Rundgren S

更新日期：1993-03-01 00:00:00

abstract：:Sea lion and seal populations in Alaskan waters underwent various degrees of decline during the latter half of the twentieth century and the cause(s) for the declines remain uncertain. The stable carbon ((13)C/(12)C) and nitrogen ((15)N/(14)N) isotope ratios in bone collagen from wild Steller sea lions (Eumetopias jub...

journal_title：Oecologia

authors： Hirons AC,Schell DM,Finney BP

更新日期：2001-12-01 00:00:00

abstract：:Two calanoid copepod genera, Boeckella and Calamoecia have broadly similar geographic distributions in Australia but Boeckella is more common than Calamoecia. A field survey and literature search indicate that Boeckella is usually the first calanoid to colonize newly formed bodies of water, and Boeckella is more commo...

journal_title：Oecologia

authors： Maly EJ

更新日期：1984-05-01 00:00:00

abstract：:Regulation of seed germination phenology is an important aspect of the life history strategy of invading annual plant species. In the obligately selfing winter annual grass Bromus tectorum, seeds are at least conditionally dormant at dispersal in early summer and lose dormancy through dry-afterripening. Patterns of ge...

journal_title：Oecologia

authors： Meyer SE,Allen PS

更新日期：1999-07-01 00:00:00

abstract：:After having been hunted to near-extinction in the Pacific maritime fur trade, the sea otter population at Amchitka Island, Alaska increased from very low numbers in the early 1900s to near equilibrium density by the 1940s. The population persisted at or near equilibrium through the 1980s, but declined sharply in the ...

journal_title：Oecologia

authors： Watt J,Siniff DB,Estes JA

更新日期：2000-08-01 00:00:00

abstract：:We used Y-plant, a computer-based model of crown architecture, to examine the implications of leaf reorientation resulting from petiole bending in Psychotria limonensis (Rubiaceae) seedlings. During this reorientation process, bending of the petioles of lower leaves that are potentially self-shaded by the upper leaves...

journal_title：Oecologia

authors： Gálvez D,Pearcy RW

更新日期：2003-03-01 00:00:00

abstract：:Fruit survival patterns, from fertilization to maturation, were examined for Carya ovata and C. tomentosa in a New Jersey USA forest. We observed fruiting and shoot growth characteristics over a 3-yr period to determine: (1) the patterns of fruit survivorship (from initiation to maturity) within and among years, (2) t...

journal_title：Oecologia

authors： McCarthy BC,Quinn JA

更新日期：1992-08-01 00:00:00

abstract：:Seed dispersal is an important ecosystem function, but it is contentious how structural and functional diversity of plant and bird communities are associated with seed-dispersal functions. We used structural equation models to test how structural (i.e., abundance, species richness) and functional diversity (i.e., func...

journal_title：Oecologia

authors： Quitián M,Santillán V,Espinosa CI,Homeier J,Böhning-Gaese K,Schleuning M,Neuschulz EL

更新日期：2019-02-01 00:00:00

abstract：:Fourteen temperate, submerged macrophytes were cultivated in the laboratory at high DIC levels (3.3-3.8 mM), 10.4-14.4 mol photons (PAR) m-2 d-1 and 15°C. Photosynthesis at photosaturation ranged between 0.59 and 17.98 mg O2 g-1 DW h-1 at ambient pH (8.3) and were markedly higher between 1.76 and 47.11 mg O2 g-1 DW h-...

journal_title：Oecologia

authors： Nielsen SL,Sand-Jensen K

更新日期：1989-11-01 00:00:00

abstract：:This study investigated direct and indirect interactions between the ant, Pheidole megacephala (Fabr.), the green scale, Coccus viridis (Green), and the scale's host plant, Pluchea indica (L.). To examine the influence of ants on scales and host plants, scale population densities, scale mortality rates, and plant perf...

journal_title：Oecologia

authors： Bach CE

更新日期：1991-07-01 00:00:00

abstract：:The presence of litter has the potential to alter the population dynamics of plants. In this paper, we explore the effects of litter on population dynamics using a simple experimental laboratory system with populations of the annual crucifer, Cardamine pensylvanica. Using a factorial experiment with four densities and...

journal_title：Oecologia

authors： Molofsky J,Lanza J,Crone EE

更新日期：2000-09-01 00:00:00

abstract：:A simple life table model was constructed for Tetranychus urticae in which daily survivorship of eggs and motil stages, fecundity, and development time was altered to assess the impact of each parameter on the intrinsic rate of increase. r. Interpretation of the trade-offs focused on management considerations.A second...

journal_title：Oecologia

authors： Carey JR

更新日期：1982-01-01 00:00:00

abstract：:Measurements are reported of carbon isotope ratios of Dudleya species growing in natural plant communities. Considerable variation in the δ13C values are interpreted as indicating substantial flexibility of the photosynthetic pathways between C3 and CAM. The variability in photosynthetic pathway was in response to gen...

journal_title：Oecologia

authors： Troughton JH,Mooney HA,Berry JA,Verity D

更新日期：1977-12-01 00:00:00

abstract：:The remains of northern fur seals (Callorhinus ursinus) are among the most abundant of pinniped elements recovered from mainland coastal archaeological sites in both California and Oregon. This is surprising as all contemporary northern fur seals breed exclusively on offshore islands, primarily at high latitudes, and ...

journal_title：Oecologia

authors： Burton RK,Snodgrass JJ,Gifford-Gonzalez D,Guilderson T,Brown T,Koch PL

更新日期：2001-06-01 00:00:00

abstract：:Relationships between fine root growth, rates of litter decomposition and nutrient release were analysed in a mixed forest on Tierra Firme, a Tall Amazon Caatinga and a Low Bana on podsolized sands near San Carlos de Rio Negro. Fine root growth in the upper soil layers (root mat+10 cm upper soil) was considerably high...

journal_title：Oecologia

authors： Cuevas E,Medina E

更新日期：1988-07-01 00:00:00

abstract：:During summer, 1971, a massive outbreak of red tide resulted in defaunation of a previously characterized sandy, intertidal habitat in upper Old Tampa Bay, Tampa, Florida. Repopulation of the polychaete fauna was studied from August, 1971, to July, 1973. A transect composed of 4 stations running from just below mean h...

journal_title：Oecologia

authors： Dauer DM,Simon JL

更新日期：1976-06-01 00:00:00

abstract：:Feeding behavior in B. calyciflorus was observed in both constrained and unconfined individuals. There are at least three mechanisms by which the ingestion of suspended particles may be regulated. First, the cirri of the pseudotrochus may be extended, allowing particles to enter the funnel-shaped buccal field, or they...

journal_title：Oecologia

authors： Gilbert JJ,Starkweather PL

更新日期：1977-06-01 00:00:00

abstract：:Daily energy metabolism and water flux were measured with doubly labeled water in the free-living insectivorous lizards Cnemidophorus tigris (mean body mass 15.7 g) and Callisaurus draconoides (8.6 g) in June 1979 in the Colorado Desert of California. C. tigris was an active forager; it spent 91% of its 5-h daily acti...

journal_title：Oecologia

authors： Anderson RA,Karasov WH

更新日期：1981-05-01 00:00:00

abstract：:We studied the population structure of a high arctic breeding wader bird species, the White-rumped Sandpiper Calidris fuscicollis. Breeding adults, chicks and juveniles were sampled at seven localities throughout the species' breeding range in arctic Canada in 1999. The mitochondrial control region was analysed by DNA...

journal_title：Oecologia

authors： Wennerberg L,Klaassen M,Lindström Å

更新日期：2002-05-01 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：: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 effects of bannertail kangaroo rat (Dipodomys spectabilis) mounds and associated soil-surface disturbance on plant species composition and diversity in the Chihuahuan Desert were examined with multivariate analysis. Kangaroo rat mounds created disturbance gaps and contributed to local species diversity by creating...

journal_title：Oecologia

authors： Guo Q

更新日期：1996-04-01 00:00:00

abstract：:Studies of population dynamics of long-lived species have generally focused on adult survival because population growth should be most sensitive to this parameter. However, actual variations in population size can often be driven by other demographic parameters, such as juvenile survival, when they show high temporal ...

journal_title：Oecologia

authors： Souchay G,Gauthier G,Pradel R

更新日期：2013-09-01 00:00:00

abstract：:Plant physiological strategies of carbon (C) and nitrogen (N) uptake and metabolism are often regarded as outcomes of environmental selection. This is likely true, but the role of evolutionary history may also be important in shaping patterns of functional diversity. Here, we used leaf C and N stable isotope ratios (δ...

journal_title：Oecologia

authors： Goud EM,Sparks JP

更新日期：2018-08-01 00:00:00

abstract：:We examined the effects of intraguild predation (IGP) and interference competition on an endangered dragonfly, Aeshna viridis Eversm. (Odonata: Anisoptera). A. viridis is rare in Europe due to the decrease in suitable habitats harboring the macrophyte Stratiotes aloides L. Stratiotes plants are the principal ovipositi...

journal_title：Oecologia

authors： Suutari E,Rantala MJ,Salmela J,Suhonen J

更新日期：2004-06-01 00:00:00