Diversity and productivity of plant communities across the Inland Northwest, USA.

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：:Ecosystem-wide effects of introduced brown trout (Salmo trutta L.) and native river galaxias (Galaxiaseldoni McDowall) were studied by analysing ecosystem production budgets for two adjacent tributaries of a grassland stream-system in the South Island of New Zealand. One tributary was inhabited by brown trout, the oth...

journal_title：Oecologia

authors： Huryn AD

更新日期：1998-06-01 00:00:00

abstract：:Ecologists routinely set out to estimate the trophic position of individuals, populations, and species composing food webs, and nitrogen stable isotopes (δ(15)N) are a widely used proxy for trophic position. Although δ(15)N values are often sampled at the level of individuals, estimates and confidence intervals are fr...

journal_title：Oecologia

authors： Reum JC,Marshall KN

更新日期：2013-12-01 00:00:00

abstract：:In fasting Pisidium amnicum and Sphaerium corneum, regular periods of behavioural and metabolic quiescence were shown to occur in the normoxic, constant environment of the flow-through chamber of a heat-flow microcalorimeter. The metabolic rate was suppressed to 7.5% of normal at 10° C and to 8.5-9.7% at 20° C for per...

journal_title：Oecologia

authors： Holopainen IJ,Penttinen OP

更新日期：1993-03-01 00:00:00

abstract：:Northern deer populations are typically partially migratory, but the relationship between migratory movements and parasites has received little attention. Migration often involves movement from a low-elevation winter range towards a summer range at higher elevation. In Europe these movements may also involve a gradien...

journal_title：Oecologia

authors： Mysterud A,Qviller L,Meisingset EL,Viljugrein H

更新日期：2016-02-01 00:00:00

abstract：:Short-term responses of producers highlight that key nutrients (e.g., N, P)-or combinations of these nutrients-limit primary production in aquatic and terrestrial ecosystems. These discoveries continue to provide highly valuable insights, but it remains important to ask whether nutrients always predominantly limit pro...

journal_title：Oecologia

authors： Darcy-Hall TL,Hall SR

更新日期：2008-04-01 00:00:00

abstract：:Resource supply and pollen delivery are often thought to equally limit seed production in animal-pollinated plants. At equilibrium, plants should show no response to experimental pollen supplementation because resources limit seed set above the current level of pollen attraction, while experimental reduction in pollen...

journal_title：Oecologia

authors： Ornelas JF,Lara C

更新日期：2009-07-01 00:00:00

abstract：:The neotropical shrub Pentagonia macrophylla Benth. (Rubiaceae) has protandrous two-day flowers. Synchronous development among flowers on a single individual results in sequential phenotypic unisexuality: the entire plant alternates gender from day to day. Pistillate flowers produce more nectar than staminate flowers ...

journal_title：Oecologia

authors： McDade LA

更新日期：1986-01-01 00:00:00

abstract：:To investigate the physiological, behavioral, and genetic contributions to growth rate, we studied the thermal sensitivity of growth rate in hatchlings of the iguanid lizards Sceloporus occidentalis and S. graciosus in the laboratory. We used a cycling thermal regime patterned after thermal environments found in natur...

journal_title：Oecologia

authors： Sinervo B,Adolph SC

更新日期：1989-03-01 00:00:00

abstract：:Pollen movement is often restricted in natural populations, and insufficient pollination is a potential constraint on sexual reproduction in outcrossing species. Seed-set should decrease with increased distance from the pollen source in outcrossing plants. This prediction was tested using females of the clonal, gynodi...

journal_title：Oecologia

authors： Widén B,Widén M

更新日期：1990-06-01 00:00:00

abstract：:Prosopis is a genus of phreatophytic trees inhabiting hot deserts and semiarid grasslands of the world. Although desert trees are exposed to unusual environmental temperature and water stress, few investigations have evaluated their water relations. This is particularly true for Prosopis species growing in areas where...

journal_title：Oecologia

authors： Nilsen ET,Rundel PW,Sharifi MR

更新日期：1981-08-01 00:00:00

abstract：:The stress-gradient hypothesis (SGH) predicts that the community-wide prevalence of positive interactions, relative to negative interactions, is greater under more severe environmental conditions. Because the frequency of positive and negative interactions within a community is the aggregate of multiple pair-wise inte...

journal_title：Oecologia

authors： le Roux PC,McGeoch MA

更新日期：2010-03-01 00:00:00

abstract：:Data from the US/IBP Desert Biome validation studies indicate that above-ground production and biomass allocated to reproduction in Larrea tridentata vary from one year to another depending upon the timing and extent of soil-moisture availability. In an attempt to verify these observations and determine to what extent...

journal_title：Oecologia

authors： Cunningham GL,Syvertsen JP,Reynolds JF,Willson JM

更新日期：1979-01-01 00:00:00

abstract：:Non-trophic interactions, driven by one species changing the behavior but not density of another species, appear to be as pervasive as those involving consumption. However, ecologists have only begun to explore non-trophic interactions in species-rich communities. We investigated interactions within a community includ...

journal_title：Oecologia

authors： Prasad RP,Snyder WE

更新日期：2010-03-01 00:00:00

abstract：:Amphibian life history traits are affected by temperature and precipitation. Yet, connecting these relationships to population growth, especially for multiple populations within a species, is lacking and precludes our understanding of amphibian population dynamics and distributions. Therefore, we constructed integral ...

journal_title：Oecologia

authors： Caruso NM,Staudhammer CL,Rissler LJ

更新日期：2020-08-01 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 field thermal biology of sympatric Anolis cooki and A. cristatellus were evaluated in January and in August in desert scrub forest at Playa de Tamarindo near Guanica, Puerto Rico. Data on randomly positioned copper models of lizards, each equipped with a built-in thermocouple, established null hypotheses about bas...

journal_title：Oecologia

authors： Hertz PE

更新日期：1992-04-01 00:00:00

abstract：:Although ontogenetic changes in the carbon isotope ratios of marine fauna have been well studied those of freshwater organisms have not. As a result, we may have a less than adequate assessment of the incorporation of allochthonous detritus into freshwater foodwebs. This study found a δ13C range of 9‰ for crayfish (Or...

journal_title：Oecologia

authors： France R

更新日期：1996-07-01 00:00:00

abstract：:Fruiting phenology and pattern of fruit removal of two shrubby dogwoods were examined in relation to fruit composition. It was predicted that fruit of the species bearing high fat fruit would disappear more rapidly and fall to the ground sooner than fruit of the species bearing low fat fruit. Field observation at two ...

journal_title：Oecologia

authors： Borowicz VA,Stephenson AG

更新日期：1985-10-01 00:00:00

abstract：:Genotype frequencies of adult and juvenile Actinia tenebrosa from 2 populations showed that settlement and recruitment predominantly involved the localised asexual (ameiotic) proliferation of established genotypes. However, there is strong indirect evidence that the genotypic variation was generated by sexual reproduc...

journal_title：Oecologia

authors： Ayre DJ

更新日期：1983-03-01 00:00:00

abstract：:Agricultural land use is a leading cause of habitat degradation, leaving a legacy of ecological impacts long after agriculture has ceased. Yet the mechanisms for legacy effects, such as altered plant community composition, are not well understood. In particular, whether plant community recovery is limited by an inabil...

journal_title：Oecologia

authors： Barker CA,Turley NE,Orrock JL,Ledvina JA,Brudvig LA

更新日期：2019-04-01 00:00:00

abstract：:This study quantified both the age- and sex-specific survival rates of juveniles and adults, and tested for interannual differences in age-specific survival rates of the southern elephant seal population at Marion Island. Pups were tagged on an annual basis from 1983 onwards at Marion Island, and a consistent recaptur...

journal_title：Oecologia

authors： Pistorius PA,Bester MN,Kirkman SP

更新日期：1999-11-01 00:00:00

abstract：:This study examined the effects of elevated CO2 on secondary metabolites for saplings of tropical trees. In the first experiment, nine species of trees were grown in the ground in open-top chambers in central Panama at ambient and elevated CO2 (about twice ambient). On average, leaf phenolic contents were 48% higher u...

journal_title：Oecologia

authors： Coley P,Massa M,Lovelock C,Winter K

更新日期：2002-09-01 00:00:00

abstract：:Climate change causes species range expansions to higher latitudes and altitudes. It is expected that, due to differences in dispersal abilities between plants and soil biota, range-expanding plant species will become associated with a partly new belowground community in their expanded range. Theory on biological inva...

journal_title：Oecologia

authors： Wilschut RA,Magnée KJH,Geisen S,van der Putten WH,Kostenko O

更新日期：2020-10-01 00:00:00

abstract：:The carabid beetle Nebria brevicollis (F.), despite being macropterous, has a very low flight potential. Only a few percent of the beetles has functional flight muscles, flight motivation is low, and the period favourable for flight is short. The inability to fly is caused mainly by arrested development of the flight ...

journal_title：Oecologia

authors： Nelemans MN

更新日期：1987-07-01 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：: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：: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：:In a survey of 28 plant species of 6 major growth forms from Alaskan tundra, we found no consistent difference among growth forms in the chemical nature of stored reserves except for lichens and mosses (which stored C primarily as polysaccharides) and shrubs (which tended to store C more as sugars than as polysacchari...

journal_title：Oecologia

authors： Chapin FS 3rd,Shaver GR

更新日期：1988-12-01 00:00:00

abstract：:Despite the abundance of studies on competitive interactions, relatively few experiments have been used to fit explicit competition models and estimate competition coefficients. Such estimates are valuable for making contact between theoretical and empirical studies, which tend to measure competition in different unit...

journal_title：Oecologia

authors： Inouye BD

更新日期：1999-09-01 00:00:00