A comparative study of floral and electrophoretic variation with life history variation in Limnanthes alba (Limnanthaceae).

abstract：:In this paper, we test the mid-domain hypothesis as an explanation for observed patterns of flowering diversity in two sub-alpine communities of insect-pollinated plants. Observed species richness patterns showed an early-season increase in richness, a mid-season peak, and a late-season decrease. We show that a "mid-d...

journal_title：Oecologia

authors： Morales MA,Dodge GJ,Inouye DW

更新日期：2005-01-01 00:00:00

abstract：:The need to allocate a limited amount of energy between different life-history traits is a fundamental assumption in life-history theory. However, it has often turned out to be extremely difficult to measure the competing processes that contribute to costs or benefits for individual organisms. The present investigatio...

journal_title：Oecologia

authors： Stadler B

更新日期：1995-05-01 00:00:00

abstract：:The structure and seasonal dynamics of phytoplankton communities in the littoral zone were compared between oligotrophic and eutrophic lakes in the southeastern United States. Differences in diversity and species composition between lakes could be ascribed to long-term variation in nutrients corresponding to trophic s...

journal_title：Oecologia

authors： Lemly AD,Dimmick JF

更新日期：1982-09-01 00:00:00

abstract：:Predator-generated variation in prey energy intake remains the dominant explanation of adaptive response to predation risk in prey life history, morphology and physiology across a wide range of taxa. This "behavioural hypothesis" suggest that chemical or visual signals of predation risk reduce prey energy intake leadi...

journal_title：Oecologia

authors： Beckerman AP,Wieski K,Baird DJ

更新日期：2007-05-01 00:00:00

abstract：: Fluorogenic substrate analogues (MUF substrates) are very sensitive in detecting hydrolytic enzymes. This method was adapted for the quantitative analysis of extracellular enzymes in snails and other animals. It was then used to determine cellobiase, chitobiase, protease, esterase, phosphatase and lipase in the diges...

journal_title：Oecologia

authors： Brendelberger H

更新日期：1996-12-01 00:00:00

abstract：:Previous studies have shown that green sunfish, Lepomis cyanellus, have strong effects on the activity, habitat use, social interactions and mating dynamics of a stream-dwelling water strider, Aquarius remigis (family Gerridae, hence, gerrids). In nature, however, stream pools often contain not just sunfish and water ...

journal_title：Oecologia

authors： Sih A,Krupa JJ

更新日期：1996-01-01 00:00:00

abstract：:Twenty nine harpacticoid copepods are new to Bermuda and significant changes are noted in the distribution records of several species. Six temporary groups are organized to separate the copepods on their apparent zoogeographical ranges: (1) cosmopolitan, (2) warm temperate-tropical, (3) North Atlantic, (4) North Atlan...

journal_title：Oecologia

authors： Coull BC,Herman SS

更新日期：1970-12-01 00:00:00

abstract：:Most fish species are regularly subjected to periods of starvation during which a reduction of energy turnover might be favourable for the animal. This reduction of energy flux may be achieved by changes in thermal behaviour and/or swimming activity. We investigated such behavioural changes during starvation and subse...

journal_title：Oecologia

authors： van Dijk P,Staaks G,Hardewig I

更新日期：2002-02-01 00:00:00

abstract：:Salicinoid phenolic glycosides are common defence substances in salicaceous trees and specialist leaf beetles use these compounds for their own defence against predators. Salicinoids vary qualitatively and qualitatively in aspen (Populus tremula) and this variation has a genetic basis. The foliar endophyte mycobiome i...

journal_title：Oecologia

authors： Albrectsen BR,Siddique AB,Decker VHG,Unterseher M,Robinson KM

更新日期：2018-06-01 00:00:00

abstract：:The ribulose-1,5-bis-phosphate (RBPC) 14CO2 fixation rate was measured at four different temperatures, 5°, 15°, 25° and 35° C, in three populations of Espeletia schultzii at different altitudes, 3100, 3550 and 4200 ma.s.l. The fixation rate increased with temperature increase in the populations studied. The population...

journal_title：Oecologia

authors： Castrillo M

更新日期：1995-02-01 00:00:00

abstract：:Increases in terrestrial primary productivity across the Arctic and northern alpine ecosystems are leading to altered vegetation composition and stature. Changes in vegetation stature may affect predator-prey interactions via changes in the prey's ability to detect predators, changes in predation pressure, predator id...

journal_title：Oecologia

authors： Wheeler HC,Chipperfield JD,Roland C,Svenning JC

更新日期：2015-07-01 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：:The predator Amoeba proteus induced behavioural and morphological changes in ciliates of the genus Euplotes. The frequency of avoidance behaviour in E. octocarinatus increased from 16±5% to 84±5% (SD) after 14 h of coexistence with the predator. The ciliate's width increased from 59±3 μm to 77±4 μm (SDM) within 48 h. ...

journal_title：Oecologia

authors： Kusch J

更新日期：1993-12-01 00:00:00

abstract：:Relatively few published food webs have included parasites, and in this study we examined the animal community in a stream across eight contiguous seasons to test how inclusion of helminth parasites alters the topology or structure of the food web. Food webs constructed for each season and analyzed using common binary...

journal_title：Oecologia

authors： Hernandez AD,Sukhdeo MV

更新日期：2008-06-01 00:00:00

abstract：:Habitat fragmentation modifies ecological patterns and processes through changes in species richness and abundance. In the coastal Maulino forest, central Chile, both species richness and abundance of insectivorous birds increases in forest fragments compared to continuous forest. Through a field experiment, we examin...

journal_title：Oecologia

authors： González-Gómez PL,Estades CF,Simonetti JA

更新日期：2006-05-01 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：:A climate room is described for precise regulation of temperature and humidity. Humidity is regulated by regulation of the dew-point temperature of the air. The ranges for both dew-point and air temperature are from 2°C to 45°C. The precision of regulation for the temperature is ±0.05°C, for the dew-point temperature ...

journal_title：Oecologia

authors： Bruin MK,Brandt DC,Körner FJ

更新日期：1976-12-01 00:00:00

abstract：:In a tropical environment near the equator in Nairobi, Kenya, flesh fly development is nearly continuous throughout the year with only a few individuals being channeled into pupal diapause during the coldest months. Two species reared in a field cage completed 7 generations/year. Generation time for nondiapause flies ...

journal_title：Oecologia

authors： Denlinger DL

更新日期：1978-01-01 00:00:00

abstract：:This study assessed the effect of nutrient enrichment on organic matter breakdown in an alpine springbrook, using alder leaf packs to which phosphorus and nitrogen were added in the form of slow-release fertilizer briquettes. The breakdown of leaf packs with nutrients added (k=0.0284 day-1) was significantly faster th...

journal_title：Oecologia

authors： Robinson CT,Gessner MO

更新日期：2000-02-01 00:00:00

abstract：:Fourteen genotypes (varieties) of soybean (Glycine max) were screened for levels of induced resistance to Mexican bean beetle (Epilachna varivestis) damage, and a subset of 6 of those varieties was screened for levels of constitutive resistance to Mexican bean beetles. Experiments were carried out in the greenhouse, w...

journal_title：Oecologia

authors： Underwood N,Morris W,Gross K,Lockwood Iii JR

更新日期：2000-01-01 00:00:00

abstract：:Belowground processes in light gap openings are poorly understood, particularly in tropical forests. Fine roots in three zones of light gap openings and adjacent intact forest were regularly measured in buried bags and surface litter envelopes for 2 years. Fine root biomass does not vary significantly within gaps for ...

journal_title：Oecologia

authors： Sanford RL Jr

更新日期：1990-07-01 00:00:00

abstract：:While the ecological consequences of roads are well described, little is known of their role as agents of natural selection, which can shape adaptive and maladaptive responses in populations influenced by roads. This knowledge gap persists despite a growing appreciation for the influence of evolution in human-altered ...

journal_title：Oecologia

authors： Brady SP

更新日期：2017-08-01 00:00:00

abstract：:Multiple regression analyses were made of the effect of food composition upon energetic efficiency and existence energy of House Sparrows, Passer domesticus. Protein content of experimental food is the most important of eleven independent variables tested in the prediction of energetic efficiency. Other variables sign...

journal_title：Oecologia

authors： Blem CR

更新日期：1976-09-01 00:00:00

abstract：:Hypotheses about the influence of intraspecific density and available cover on home range size (=mean activity radius) of a plethodontid salamander (Desmognathus monticola) were tested by field experimentation from June 1980 to October 1981. A second order mountain stream in southwestern North Carolina was marked into...

journal_title：Oecologia

authors： Kleeberger SR

更新日期：1985-06-01 00:00:00

abstract：:Invasion of non-native annuals across the Intermountain West is causing a widespread transition from perennial sagebrush communities to fire-prone annual herbaceous communities and grasslands. To determine how this invasion affects ecosystem function, carbon and water fluxes were quantified in three, paired sagebrush ...

journal_title：Oecologia

authors： Prater MR,Obrist D,Arnone JA 3rd,DeLucia EH

更新日期：2006-01-01 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

abstract：:Patterns of β-diversity can provide insight into forces shaping community assembly. We analyzed species-rich insect assemblages in two reserve fragments that had once been part of one contiguous Mediterranean coastal pine forest. Local environments are still similar across both fragments, but their landscape context d...

journal_title：Oecologia

authors： Uhl B,Wölfling M,Fiedler K

更新日期：2021-02-01 00:00:00

abstract：:For organisms that exhibit complex life cycles, resource conditions experienced by individuals before metamorphosis can strongly affect phenotypes later in life. Such resource-induced effects are known to arise from variation in resource quantity, yet little is known regarding effects stemming from variation in resour...

journal_title：Oecologia

authors： Stoler AB,Stephens JP,Relyea RA,Berven KA,Tiegs SD

更新日期：2015-11-01 00:00:00

abstract：:Plant invasions can have substantial consequences for the soil ecosystem, altering microbial community structure and nutrient cycling. However, relatively little is known about what drives these changes, making it difficult to predict the effects of future invasions. In addition, because most studies compare soils fro...

journal_title：Oecologia

authors： Elgersma KJ,Ehrenfeld JG,Yu S,Vor T

更新日期：2011-11-01 00:00:00

abstract：:General circulation models project more intense and frequent droughts over the next century, but many questions remain about how terrestrial ecosystems will respond. Of particular importance, is to understand how drought will alter the species composition of regenerating temperate forests wherein symbiotic dinitrogen ...

journal_title：Oecologia

authors： Wurzburger N,Miniat CF

更新日期：2014-04-01 00:00:00