Effects of carotenoid availability during laying on reproduction in the blue tit.

abstract：:This paper investigates the effect of brood parasitism in a dung beetle assemblage in an arid region of Spain. The study was conducted during the spring season (March-May 1994-1998) using mesh cylinders buried into the ground, filled with sand and with sheep dung on top. We quantified the proportion of nests containin...

journal_title：Oecologia

authors： González-Megías A,Sánchez-Piñero F

更新日期：2003-01-01 00:00:00

abstract：:The hypothesis that carnivorous plants are less responsive to prey at high soil nutrient levels than at lower levels (Givnish et al. 1984) is tested on four plant species (Drosera rotundifolia, Pinguicula alpina, P. villosa and P. vulgaris) from a subarctic environment. The response, measured in terms of seven charact...

journal_title：Oecologia

authors： Karlsson PS,Nordell KO,Carlsson BÅ,Svensson BM

更新日期：1991-03-01 00:00:00

abstract：:Individuals of the collembolan species Tomocerus flavescens from a beech wood on limestone near Göttingen (West Germany) were fed with C-14-labelled algae in the laboratory. On an average, T. flavescens exchanged almost all of its endogenous carbon after 3.4 moults. In periods of starvation the interval between two ec...

journal_title：Oecologia

authors： Wolters V

更新日期：1985-01-01 00:00:00

abstract：:Several components of the diversity of plant communities, such as species richness, species composition, number of functional groups and functional composition, have been shown to directly affect the performance of exotic species. Exotics can also be affected by herbivores of the native plant community. However, these...

journal_title：Oecologia

authors： Prieur-Richard AH,Lavorel S,Linhart YB,Dos Santos A

更新日期：2002-01-01 00:00:00

abstract：:Plants in the Mediterranean climate region of California typically experience summer drought conditions, but correlations between zones of frequent coastal fog inundation and certain species' distributions suggest that water inputs from fog may influence species composition in coastal habitats. We sampled the stable H...

journal_title：Oecologia

authors： Corbin JD,Thomsen MA,Dawson TE,D'Antonio CM

更新日期：2005-10-01 00:00:00

abstract：:Both spatial processes and environmental control may structure metacommunities, but their relative importance may be contingent on the dispersal ability of organisms. I examined the roles of spatial and environmental factors for the structuring of littoral macroinvertebrate communities across a set of lakes in a borea...

journal_title：Oecologia

authors： Heino J

更新日期：2013-04-01 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：:Life history theory predicts that larger propagules should be produced when the offspring are expected to experience intense competition. This study tested whether female cowpea weevils responded to high larval or adult density by producing larger eggs. In a splitbrood design I measured the effect of density experienc...

journal_title：Oecologia

authors： Kawecki TJ

更新日期：1995-04-01 00:00:00

abstract：:Several studies have suggested that aquatic microcrustaceans are relatively efficient dispersers in a variety of landscapes, whereas others have indicated dispersal limitation at large spatial scales or under specific circumstances. Based on a survey of a set of recently created ponds in an area of approximately 18 × ...

journal_title：Oecologia

authors： Juračka PJ,Declerck SA,Vondrák D,Beran L,Černý M,Petrusek A

更新日期：2016-03-01 00:00:00

abstract：:This study examines the impacts of woody, N2-fixing invasive Acacia spp. on the patterns of nutrient cycling in two invaded ecosystems of differing nutrient status in the Cape floristic region. Patterns of soil nutrient mineralization were measured by a field incubation method while the significance of the fixation pr...

journal_title：Oecologia

authors： Stock WD,Wienand KT,Baker AC

更新日期：1995-03-01 00:00:00

abstract：:The use of habitat by female and male adult capercaillie Tetrao urogallus during summer and autumn was studied by comparing the distribution of radio locations of birds with the availability of habitat at forest stand, home range and landscape level in an area of the Bavarian Alps, Germany. Capercaillie preferred fore...

journal_title：Oecologia

authors： Storch I

更新日期：1993-08-01 00:00:00

abstract：:The life ofOncopeltus fasciatus centers on the seeds of milkweeds (Asclepiadaceae,Asclepias syriaca in this study). Adults reproduce prolifically on these seeds, but they engage in only half as much copulation and lay only a few eggs when fed milkweed buds and flowers instead. They can not maintain body weight on a di...

journal_title：Oecologia

authors： Ralph CP

更新日期：1976-06-01 00:00:00

abstract：:A 9-year study of the structure of assemblages of fish on 20 coral patch reefs, based on 20 non-manipulative censuses, revealed a total of 141 species from 34 families, although 40 species accounted for over 95% of sightings of fish. The average patch reef was 8.5 m2 in surface area, and supported 125 fish of 20 speci...

journal_title：Oecologia

authors： Sale PF,Guy JA,Steel WJ

更新日期：1994-06-01 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：:Plasticity of plant traits is commonly quantified by comparing different phenotypes at the same age. In this paper, we present a method in which the effect of resource conditions on plant weight is used as a basis for quantifying the plasticity of individual plant traits. Abutilon theophrasti individuals were grown in...

journal_title：Oecologia

authors： Rice SA,Bazzaz FA

更新日期：1989-03-01 00:00:00

abstract：:Nectar plant utilization by butterflies was compared with the abundance of flowering plants on some SW Swedish meadows. The transportation of pollen grains by individual butterflies was analysed using a scanning electron microscope.For the majority of plant species, butteflies were of minor importance as pollinators. ...

journal_title：Oecologia

authors： Jennersten O

更新日期：1984-07-01 00:00:00

abstract：:Sexual expression in hermaphroditic plants is often a function of environmental factors affecting individuals before or during flowering. I tested for the effects of floral herbivory and lack of pollination in early umbels on the relative proportions of hermaphroditic and staminate (male) flowers produced on later umb...

journal_title：Oecologia

authors： Lowenberg GJ

更新日期：1997-01-01 00:00:00

abstract：:The leaf area to sapwood area ratio (A l:A s) of trees has been hypothesized to decrease as trees become older and taller. Theory suggests that A l:A s must decrease to maintain leaf-specific hydraulic sufficiency as path length, gravity, and tortuosity constrain whole-plant hydraulic conductance. We tested the hypoth...

journal_title：Oecologia

authors： McDowell N,Barnard H,Bond B,Hinckley T,Hubbard R,Ishii H,Köstner B,Magnani F,Marshall J,Meinzer F,Phillips N,Ryan M,Whitehead D

更新日期：2002-06-01 00:00:00

abstract：:In the tropical dry forest of the central Pacific coast of Mexico the pollination and reproductive success of the bombacaceous tree Ceiba grandiflora was negatively affected by habitat disruption. Two of the three bat species that function as effective pollinators for this species ( Glossophaga soricina and Musonycter...

journal_title：Oecologia

authors： Quesada M,Stoner KE,Rosas-Guerrero V,Palacios-Guevara C,Lobo JA

更新日期：2003-05-01 00:00:00

abstract：:Functional diversity has been identified as a key to understanding ecosystem and community functioning. However, due to the lack of a sound definition its nature and measurement are still poorly understood. In the same way that species diversity can be split into species richness and species evenness, so functional di...

journal_title：Oecologia

authors： Mouillot D,Mason WH,Dumay O,Wilson JB

更新日期：2005-01-01 00:00:00

abstract：:The δ 13C, ‰ values of the two principal, widely distributed CAM species in Big Bend National Park, Texas, were examined and related to phytosociologic and macroclimatic parameters. Samples of Agave lecheguilla and Opuntia engelmannii were collected along an elevational gradient covering 1370 m, and δ values for both ...

journal_title：Oecologia

authors： Eickmeier WG,Bender MM

更新日期：1976-12-01 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：:Dormancy is a common way in which organisms survive environmental conditions that would be lethal to the active individual. However, while dormant, individuals forego reproduction. Hence theory suggests an optimal time in which to enter dormancy, depending on risks associated with both remaining active and entering do...

journal_title：Oecologia

authors： Cáceres CE,Tessier AJ

更新日期：2004-11-01 00:00:00

abstract：:We investigated in the field the carbon (C) transfer between sugar maple (Acer saccharum) saplings and the spring ephemeral Erythronium americanum via the mycelium of arbuscular mycorrhizal (AM) fungi. Sugar maple saplings and E. americanum plants were planted together in pots placed in the ground of a maple forest in...

journal_title：Oecologia

authors： Lerat S,Gauci R,Catford JG,Vierheilig H,Piché Y,Lapointe L

更新日期：2002-07-01 00:00:00

abstract：:Biodiverse environments provide a variety of resources that can be exploited by consumers. While many studies revealed a positive correlation between biodiversity and consumer biomass and richness, only few studies have investigated how resource diversity affects single consumers. To better understand whether a single...

journal_title：Oecologia

authors： Drescher N,Wallace HM,Katouli M,Massaro CF,Leonhardt SD

更新日期：2014-12-01 00:00:00

abstract：:Many small organisms in various life stages can be transported in the digestive system of larger vertebrates, a process known as endozoochory. Potential dispersal distances of these "propagules" are generally calculated after monitoring retrieval in experiments with resting vector animals. We argue that vectors in nat...

journal_title：Oecologia

authors： van Leeuwen CH,Tollenaar ML,Klaassen M

更新日期：2012-09-01 00:00:00

abstract：:Larvae of the pyralid moth, Herpetogramma aeglealis, construct feeding shelters upon the Christmas fern (Polystichum acrostichoides). Field and laboratory study involving 532 shelters showed that as the larvae mature, they sequentially inhabit approximately 5 shelters of 3 distinct types, constructed at night on diffe...

journal_title：Oecologia

authors： Ruehlmann TE,Matthews RW,Matthews JR

更新日期：1988-03-01 00:00:00

abstract：:Hydrologic regime is an important control of primary production in wetland ecosystems. I investigated the coupling of flooding, soil salinity and plant production in northern prairie marshes that experience shallow spring flooding. Field experiments compared whitetop (Scolochloa festucacea) marsh that was: (1) nonfloo...

journal_title：Oecologia

authors： Neill C

更新日期：1993-10-01 00:00:00

abstract：:Effects of temperature changes on phytoplankton communities seem to be highly context-specific, but few studies have analyzed whether this context specificity depends on differences in the abiotic conditions or in species composition between studies. We present an experiment that allows disentangling the contribution ...

journal_title：Oecologia

authors： Striebel M,Schabhüttl S,Hodapp D,Hingsamer P,Hillebrand H

更新日期：2016-11-01 00:00:00

abstract：:Some individual plants of the mustard Brassica nigra in lowland California kill eggs of the Crucifer-specialist herbivores Pieris rapae and P. napi by producing a necrotic zone at the base of the egg, thereby apparently desicating it. This is a typical hypersensitivity reaction, but to an atypical stimulus. The eggs c...

journal_title：Oecologia

authors： Shapiro AM,DeVay JE

更新日期：1987-03-01 00:00:00