Effects of brood parasitism on host reproductive success: evidence from larval interactions among dung beetles.

abstract：:Data on flower colour polymorphism were recorded for 341 of some 426 species of Erica occurring in the south-western Cape, South Africa. Thirty-eight per cent of these Erica species are colour polymorphic, the incidence of polymorphism being greater than expected for ornithophilous species and lower than expected for ...

journal_title：Oecologia

authors： Rebelo AG,Siegfried WR

更新日期：1985-03-01 00:00:00

abstract：:Niche partitioning of resources by plants is believed to be a fundamental aspect of plant coexistence and biogeochemical cycles; however, measurements of the timing and location of resource use are often lacking because of the difficulties of belowground research. To measure niche partitioning of soil water by grasses...

journal_title：Oecologia

authors： Kulmatiski A,Beard KH

更新日期：2013-01-01 00:00:00

abstract：:We document activity field temperatures, daily activity patterns, and extent of thermoregulation in four species of Liolaemus lizards inhabiting at high altitude (above 3500 m) in the Andes of northern Chile. These four species have similar activity field temperature (Tb near 29°C) despite their being distributed at d...

journal_title：Oecologia

authors： Marquet PA,Ortíz JC,Bozinovié F,Jaksié FM

更新日期：1989-10-01 00:00:00

abstract：:Geographic variation in species interactions can have major effects on species distributions and can be important for the resistance of resident communities to invasive species. We tested the hypothesis that coexistence or replacement of a resident North American mosquito Aedes aegypti with the invasive Aedes albopict...

journal_title：Oecologia

authors： Leisnham PT,Juliano SA

更新日期：2010-09-01 00:00:00

abstract：:The seasonal and long-term population dynamics of helminths parasitizing voles suggested that density-dependent factors might be important in the population dynamics of common species, whereas density-independent factors predominate in the regulation of the rare species. To test this, we used single and multiple regre...

journal_title：Oecologia

authors： Haukisalmi V,Henttonen H

更新日期：1990-06-01 00:00:00

abstract：:Plant compensatory growth responses to herbivory are mediated by soil fertility and can have significant feedbacks that affect overall ecosystem nutrient cycling. The sedge Eriophorum vaginatum is the dominant graminoid in arctic mesic tundra, and is heavily consumed by caribou. Here, we compare the principal compensa...

journal_title：Oecologia

authors： Grogan P,Zamin TJ

更新日期：2018-01-01 00:00:00

abstract：:This study examines the effect of different densities and the removal of all neighbours at different stages of development on all components of reproduction in the inbreeding annual Thlaspi arvense L. A 64-fold increase in density significantly reduced all repooductive components. The number of flower buds per plant w...

journal_title：Oecologia

authors： Matthies D

更新日期：1990-05-01 00:00:00

abstract：:How pathogens affect their hosts is a key question in infectious disease ecology, and it can have important influences on the spread and persistence of the pathogen. Sin Nombre virus (SNV) is the etiological agent of hantavirus pulmonary syndrome (HPS) in humans. A better understanding of SNV in its reservoir host, th...

journal_title：Oecologia

authors： Luis AD,Douglass RJ,Hudson PJ,Mills JN,Bjørnstad ON

更新日期：2012-06-01 00:00:00

abstract：:Predawn water potential of representative plant species, together with stable isotope composition of stem water and potential water sources were investigated in four low-elevation tropical hardwood hammocks in the Lower Florida Keys, during a one year period. Hammock species had the lowest water potentials when soil w...

journal_title：Oecologia

authors： Ish-Shalom N,Sternberg LD,Ross M,O'Brien J,Flynn L

更新日期：1992-10-01 00:00:00

abstract：:While trying to achieve their nutritional requirements, foraging herbivores face the costs of plant defenses, such as toxins. Teasing apart the costs and benefits of various chemical constituents in plants is difficult because their chemical defenses and nutrient concentrations often co-vary. We used an approach deriv...

journal_title：Oecologia

authors： Bedoya-Pérez MA,Issa DD,Banks PB,McArthur C

更新日期：2014-08-01 00:00:00

abstract：:It is widely recognized that pollinators vary in their effectiveness in pollination mutualisms, due both to differences in flower-pollinator morphological fit as well as pollinator behaviour. However, pollination webs typically treat all interactions as equal, and we contend that this method may provide misleading res...

journal_title：Oecologia

authors： Sánchez-Lafuente AM,Rodríguez-Gironés MA,Parra R

更新日期：2012-01-01 00:00:00

abstract：:In the Central Negev, the arido-active Hammada scoparia (Chenopodiaceae) is mainly distributed in runnels and loessial plains of the wadis and exists with fewer and smaller individuals on slopes and tops of the neighboring hills. At the end of the dry season, water relations and chloride content of plants from these h...

journal_title：Oecologia

authors： Kappen L,Lange OL,Schulze ED,Evenari M,Buschbom U

更新日期：1976-12-01 00:00:00

abstract：:The outflying and homeflying activity pattern of a colony of the Indian pygmy bat Pipistrellus mimus occupying a tunnel was studied under natural conditions. Before leaving the tunnel for foraging, the bats made circling flights outside to sample the environmental light conditions. The onset and end of activity was re...

journal_title：Oecologia

authors： Isaac SS,Marimuthu G

更新日期：1993-12-01 00:00:00

abstract：:Increased nitrogen (N) deposition, resulting from the combustion of fossil fuels, production of synthetic fertilizers, growth of N(2)-fixing crops and high-intensity agriculture, is one of the anthropogenic factors most likely to cause global biodiversity changes over the next century. This influence may be especially...

journal_title：Oecologia

authors： Skogen KA,Holsinger KE,Cardon ZG

更新日期：2011-01-01 00:00:00

abstract：:CO2 exchange characteristics and the activity of the carboxylating enzymes phosphoenolpyruvate carboxylase (PEP-C, E.C. 4.1.1.31) and ribulose 1,5-bisphosphate carboxylase (RuBP-C, E.C. 4.1.1.39) during one year in the greenhouse and at two levels of light and temperature in growth chambers were determined in the C3-C...

journal_title：Oecologia

authors： Fladung M,Hesselbach J

更新日期：1989-05-01 00:00:00

abstract：:Heterotrophic gains of carbon from various host species by the root hemiparasitic shrub Olax phyllanthi (Labill) R.Br. were assessed using techniques based on carbon isotope discrimination (δ13C) on C3 and C4 hosts and C:N ratios of xylem sap and dry matter of host and parasite. Heterotrophic benefits (H) to Olax base...

journal_title：Oecologia

authors： Tennakoon KU,Pate JS

更新日期：1996-02-01 00:00:00

abstract：:Soil amelioration by a wood-ant species and its consequences for the larval performance of autumnal moths feeding on mountain birch were studied at various distances from the nest mound. Soil nitrate and ammonium nitrogen did not show any clear relationship with distance. However, trees growing in the mound had over 2...

journal_title：Oecologia

authors： Karhu KJ,Neuvonen S

更新日期：1998-02-01 00:00:00

abstract：:Every summer the deepest parts of the inner Flensburg fjord are subject to O2-deficiency lasting from a few weeks to several months. In spring, however, populations of Metridium senile can be found in these areas, in spite of the fact that frequently the local anoxic period of the previous summer has been 2-3 times lo...

journal_title：Oecologia

authors： Wahl M

更新日期：1985-09-01 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：:Theoretical predictions from a simulation model of insect distributions and dispersal among isolated food plants have been tested with data gathered from 13 Cinnabar moth populations. Agreement with the predictions was good. Egg batch size was equal to or slightly larger than the number which could be supported by the...

journal_title：Oecologia

authors： Myers JH,Campbell BJ

更新日期：1976-03-01 00:00:00

abstract：:Relationships involving fire and perennial grasses are controversial in Chihuahuan Desert grasslands of southern New Mexico, USA. Research suggests that fire delays the resprouting of perennial grasses well after two growing seasons. However, such results are confounded by livestock grazing, soil erosion, and drought....

journal_title：Oecologia

authors： Drewa PB,Peters DP,Havstad KM

更新日期：2006-11-01 00:00:00

abstract：:We have examined the extreme longevity displayed by trees in relation to a theory mainly developed in animals, namely, the controversial rate of living (ROL) theory of aging which proposes that longevity is negatively correlated to metabolic rate. Plant metabolism implies respiration and photosynthesis; both are susce...

journal_title：Oecologia

authors： Issartel J,Coiffard C

更新日期：2011-01-01 00:00:00

abstract：:Carbon dioxide exchange patterns of prickly-pear cactus (Opuntia phaeacantha var. discata) were studied throughout the year to determine temperature influences on and seasonal responses of the process. Cacti exhibit CAM which permits nighttime carboxylation of CO2 to malate and daytime decarboxylation of malate to CO2...

journal_title：Oecologia

authors： Nisbet RA,Patten DT

更新日期：1974-12-01 00:00:00

abstract：:Three-to-five-year population oscillations of northern small rodents are usually synchronous over hundreds of square kilometers. This regional synchrony could be due to similarity in climatic factors, or due to nomadic predators reducing the patches of high prey density close to the average density of a larger area. W...

journal_title：Oecologia

authors： Norrdahl K,Korpimäki E

更新日期：1996-09-01 00:00:00

abstract：:Global biodiversity is threatened by multiple anthropogenic stressors but little is known about the combined effects of environmental warming and invasive species on ecosystem functioning. We quantified thermal preferences and then compared leaf-litter processing rates at eight different temperatures (5.0-22.5 °C) by ...

journal_title：Oecologia

authors： Kenna D,Fincham WN,Dunn AM,Brown LE,Hassall C

更新日期：2017-03-01 00:00:00

abstract：:The presence of spines on woody plants has been shown to limit the loss of foliage to large mammalian browsers by restricting both bite size and biting rate. We tested the hypothesis that plant spines are also an effective defense against browsing by small mammals, such as rodents, that climb within the canopy of shru...

journal_title：Oecologia

authors： Cooper SM,Ginnett TF

更新日期：1998-01-01 00:00:00

abstract：:A large number of time series of abundances of insects and birds from a variety of data sets were submitted to a new density dependence test. The results varied enormously between data sets, but the relation between the frequency of statistically significant density dependence (SSDD) and the length of the series was s...

journal_title：Oecologia

authors： Wolda H,Dennis B

更新日期：1993-10-01 00:00:00

abstract：:Globally, dung beetles (Scarabaeidae: Scarabaeinae) are linked to many critical ecosystem processes involving the consumption and breakdown of mammal dung. Endemic New Zealand dung beetles (Canthonini) are an anomaly, occurring at high abundance and low diversity on an island archipelago historically lacking terrestri...

journal_title：Oecologia

authors： Stavert JR,Gaskett AC,Scott DJ,Beggs JR

更新日期：2014-09-01 00:00:00

abstract：:Plasticity in life history strategies can be advantageous for species that occupy spatially or temporally variable environments. We examined how phenotypic plasticity influences responses of the mole salamander, Ambystoma talpoideum, to disturbance events at the St. Marks National Wildlife Refuge (SMNWR), FL, USA from...

journal_title：Oecologia

authors： Davis CL,Miller DA,Walls SC,Barichivich WJ,Riley J,Brown ME

更新日期：2017-03-01 00:00:00

abstract：:The effect of malarial parasitism on the ability of male western fence lizards, Sceloporus occidentalis, to compete for access to females was assessed experimentally. Pairs of male lizards, one infected with the malarial parasite, Plasmodium mexicanum, and the other not infected, were matched by size and color and pla...

journal_title：Oecologia

authors： Schall JJ,Dearing MD

更新日期：1987-09-01 00:00:00