Responses of pest and non-pest Colias butterfly larvae to intraspecific variation in leaf nitrogen and water content.

abstract：:The population dynamics of Antarctic seabirds are influenced by variations in winter sea ice extent and persistence; however, the type of relationship differs according to the region and the demographic parameter considered. We used annual presence/absence data obtained from 1,138 individually marked birds to study th...

journal_title：Oecologia

authors： Ballerini T,Tavecchia G,Olmastroni S,Pezzo F,Focardi S

更新日期：2009-08-01 00:00:00

abstract：:Understanding social evolution requires us to understand the processes regulating the number of breeders within social groups and how they partition reproduction. Queens in polygynous (multiple queens per colony) ants often seek adoption in established colonies instead of founding a new colony independently. This mode...

journal_title：Oecologia

authors： Holzer B,Chapuisat M,Keller L

更新日期：2008-10-01 00:00:00

abstract：:Experimental ponds were used as a model system of habitat patches to study the effect of habitat size on the relative growth performance of tadpoles of Bufo americanus and Pseudacris triseriata, and on colonization by predatory insects. Three pond depths and surface areas were habitat size treatments in a replicated, ...

journal_title：Oecologia

authors： Pearman PB

更新日期：1995-04-01 00:00:00

abstract：:Effective communication regarding distance in the vertical dimension is critical for many ecological, climatological and broader geophysical studies of the Earth. Confusion exists regarding the definition of three English words commonly used to describe the vertical dimension: (1) elevation; (2) altitude; and (3) he...

journal_title：Oecologia

authors： McVicar TR,Körner C

更新日期：2013-02-01 00:00:00

abstract：:Calorific values for the vegetative tissues of a group of perennial desert and arid woodland plants ranged from 3,191 to 5,375 calories per gram, oven dry weight. These span the range of comparable values reported earlier for plants in other environments, and reflect variety in adaptations to dry environments. Tissues...

journal_title：Oecologia

authors： Darling MS

更新日期：1976-06-01 00:00:00

abstract：:Mimicry between rewarding and non-rewarding flowers within individuals has been accepted as a strategy favored by selection to deceive pollinators. It has been proposed that this mechanism relies on the exploitation of pollinator's sensory biases, but field evidence is still scarce. In this study, we describe the mech...

journal_title：Oecologia

authors： Castillo RA,Caballero H,Boege K,Fornoni J,Domínguez CA

更新日期：2012-07-01 00:00:00

abstract：:Breeding ecology and mating patterns of the western toad, Bufo boreas, were examined in three large explosively breeding populations in the Oregon Cascade Mountains. Two mating patterns occurred variably within and among the three populations. First, a large male mating advantage was observed in two of the three popul...

journal_title：Oecologia

authors： Olson DH,Blaustein AR,O'Hara RK

更新日期：1986-10-01 00:00:00

abstract：:In the stream-dwelling isopod Lirceus fontinalis, males and females engage in a precopulatory mate guarding phase prior to mating. We examined the energetic costs of mate guarding behavior in males by separately assaying glycogen and lipid content at different time increments following mating. We found that males that...

journal_title：Oecologia

authors： Sparkes TC,Keogh DP,Pary RA

更新日期：1996-04-01 00:00:00

abstract：:No-take marine reserves (NTMRs) provide hope that local carrying capacity may be partially restored if reserves are protected long enough. How long is long enough? We assess the duration of protection required for populations of large predatory reef fish in marine reserves to attain new steady states. We monitored bio...

journal_title：Oecologia

authors： Russ GR,Alcala AC

更新日期：2010-08-01 00:00:00

abstract：:In the "Solling-Projekt" (IBP) of the "Deutsche Forschungsgemeinschaft" the decomposition of different qualities of leaves in acid soil (Solling) and in lime soil (Göttinger Wald) was studied under various conditions (October 1973-October 1974).Plastic rings were used as litter bags in the following way: on the bottom...

journal_title：Oecologia

authors： Herlitzius R,Herlitzius H

更新日期：1977-06-01 00:00:00

abstract：:Parents are expected to overproduce the less costly sex under poor food conditions. The previously regular 3-year cycle in the abundance of voles, the main prey of the Ural owl, Strix uralensis, temporarily disappeared in 1999-2001. We studied Ural owls' parental feeding investment and sex allocation during these poor...

journal_title：Oecologia

authors： Brommer JE,Karell P,Pihlaja T,Painter JN,Primmer CR,Pietiäinen H

更新日期：2003-09-01 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：:The growth of metacommunity ecology as a subdiscipline has increased interest in how processes at different spatial scales structure communities. However, there is still a significant knowledge gap with respect to relating the action of niche- and dispersal-assembly mechanisms to observed species distributions across ...

journal_title：Oecologia

authors： McCauley SJ,Davis CJ,Relyea RA,Yurewicz KL,Skelly DK,Werner EE

更新日期：2008-11-01 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：:Carbon dioxide efflux and soil microenvironmental factors were measured diurnally in Carex aquatilus-and Eriophorum angustifolium-dominated riparian tundra communities to determine the relative importance of soil environmental factors controlling ecosystem carbon dioxide exchange with the atmosphere. Measurements were...

journal_title：Oecologia

authors： Oberbauer SF,Gillespie CT,Cheng W,Gebauer R,Serra AS,Tenhunen JD

更新日期：1992-12-01 00:00:00

abstract：:Species distributions are dependent on interactions with abiotic and biotic factors in the environment. Abiotic factors like temperature, moisture, and soil nutrients, along with biotic interactions within and between species, can all have strong influences on spatial distributions of plants and animals. Terrestrial A...

journal_title：Oecologia

authors： Potts LJ,Gantz JD,Kawarasaki Y,Philip BN,Gonthier DJ,Law AD,Moe L,Unrine JM,McCulley RL,Lee RE Jr,Denlinger DL,Teets NM

更新日期：2020-12-01 00:00:00

abstract：:CO2 assimilation in relation to light intensity and the relationship between leaf nitrogen and phosphorus concentrations and CO2 assimilation in 14 species of ecologically important Zimbabwean trees were examined. Eight of the species are members of the Fabaceae (Leguminosae). In the majority of Zimbabwean climax wood...

journal_title：Oecologia

authors： Tuohy JM,Prior JA,Stewart GR

更新日期：1991-11-01 00:00:00

abstract：:Many species of planktonic cladocerans display substantial variation in habitat use (mean depth and diel vertical migration), both among and within populations. We examined whether clonal segregation and specialization contributes to such behavioral variation within several lake populations of the cladoceran, Daphnia ...

journal_title：Oecologia

authors： Tessier AJ,Leibold MA

更新日期：1997-02-01 00:00:00

abstract：:It is illustrated theoretically that in a heterogeneous habitat the dispersal of individuals, even when it is random and density-independent, may have a pronounced effect of raising the average reproductive rate of the whole population, in addition to the effect of stabilization in the usual sense of reducing its vari...

journal_title：Oecologia

authors： Kuno E

更新日期：1981-05-01 00:00:00

abstract：:Carbon and nitrogen stable isotopes were used to examine variation in ant use of plant resources in the Cecropia obtusifolia / Azteca spp. association in Costa Rica. Tissue of ants, host plants and symbiotic pseudococcids were collected along three elevation transects on the Pacific slope of Costa Rica's Cordillera Ce...

journal_title：Oecologia

authors： Trimble ST,Sagers CL

更新日期：2004-01-01 00:00:00

abstract：:Spatial genetic patterns can be influenced by a broad range of factors across a landscape. The hypothesis that heterogeneous vegetation and habitat fragmentation rather than water flow influence genetic patterns in two riparian plant species with different niches was tested. Genotyping by sequencing was used to assess...

journal_title：Oecologia

authors： Hopley T,Byrne M

更新日期：2018-10-01 00:00:00

abstract：:We examined the relationship between size variability and the distribution of functional gender in stands of the monoecious, wind-pollinated annual Ambrosia artemisiifolia. Populations of 60 individuals were grown in the greenhouse at a density of 372 m-2 and at two nutrient levels. Among the surviving plants, after s...

journal_title：Oecologia

authors： Ackerly DD,Jasieński M

更新日期：1990-04-01 00:00:00

abstract：:Olfactory responses of parasitoids can be variable. This was shown by olfactometer experiments with females of two sibling Asobara species, larval endoparasitoids of Drosophilidae. Oviposition experiences of adult female parasitoids significantly altered their behavioural responses in microhabitat and host location. F...

journal_title：Oecologia

authors： Vet LE,van Opzeeland K

更新日期：1984-08-01 00:00:00

abstract：:The thermoregulatory significance of a striped-melanic colour polymorphism in the common garter snake, Thamnophis sirtalis, was assessed through a combination of labortory experimentation and field study. In experiments with living snakes the melanic morph maintained a higher body temperature than the striped morph, w...

journal_title：Oecologia

authors： Ralph Gibson A,Bruce Falls J

更新日期：1979-10-01 00:00:00

abstract：:1. The uptake of heavy metals via the alimentary tract can be an important factor for the metal budget of fish. 2. Concepts such as biomagnification, bioaccumulation, biotransference, or concentration factors, convey little information about the real threat originating from heavy metals in an aquatic food chain. 3. In...

journal_title：Oecologia

authors： Dallinger R,Prosi F,Segner H,Back H

更新日期：1987-08-01 00:00:00

abstract：:Effects of herbicides (Garlone 3A, MCPA, 2,4-D and Krenite) and nitrogen fertilizer (NH4NO3), commonly used in Swedish forestry, on nitrogen fixation (C2H2-reduction) by Peltigera praetextata (Sommerf.) Zopf. (field and laboratory) and its phycobiont Nostoc sp. (laboratory) were studied. The alga was affected by the h...

journal_title：Oecologia

authors： Hällbom L,Bergman B

更新日期：1979-01-01 00:00:00

abstract：:Plants of white clover Trifolium repens were grown under the canopies of three grass species, Lolium perenne, Agrostis tenuis and Holcus lanatus, and under simulated canopies of black polythene and controls were exposed to unfiltered natural radiation. The canopies were adjusted so that they transmitted equal intensit...

journal_title：Oecologia

authors： Thompson L,Harper JL

更新日期：1988-04-01 00:00:00

abstract：:While parasites are increasingly recognized as important components of ecosystems, we currently know little about how they alter ecosystem nutrient availability via host-mediated nutrient cycling. We examined whether infection alters the flow of nutrients through hosts and whether such effects depend upon host diet qu...

journal_title：Oecologia

authors： Narr CF,Frost PC

更新日期：2015-12-01 00:00:00

abstract：:Parents are predicted to trade offspring number and quality against the costs of reproduction. In altricial birds, parasites can mediate these costs because intensity of parasitism may increase with parental effort. In addition, parasites may mediate a trade-off between offspring number and quality because nestlings i...

journal_title：Oecologia

authors： Saino N,Ferrari RP,Romano M,Ambrosini R,Møller A

更新日期：2002-10-01 00:00:00

abstract：:Many ecological studies rely heavily on chemical analysis of plant and animal tissues. Often, there is limited time and money to perform all the required analyses and this can result in less than ideal sampling schemes and poor levels of replication. Near infrared reflectance spectroscopy (NIRS) can relieve these cons...

journal_title：Oecologia

authors： Foley WJ,McIlwee A,Lawler I,Aragones L,Woolnough AP,Berding N

更新日期：1998-09-01 00:00:00