Effects of pond size and consequent predator density on two species of tadpoles.

abstract：:We examined under laboratory conditions the thermopreference of the migratory locust, Locusta migratoria migratorioides, following infection by the entomopathogenic fungus Metarhizium anisopliae var. acridum and its influence on mycosis. Infected locusts raised their body temperature more frequently than healthy consp...

journal_title：Oecologia

authors： Ouedraogo RM,Goettel MS,Brodeur J

更新日期：2004-01-01 00:00:00

abstract：:Climate change has been shown to affect the timing of reproduction, with earlier reproduction being associated with an increase in temperature. Changes in the timing of reproduction arise from changes in food availability as well as other factors, and differences in the timing of reproduction among sites may cause sit...

journal_title：Oecologia

authors： Møller AP

更新日期：2008-04-01 00:00:00

abstract：:The isopod Sphaeroma terebrans, which bores into the prop roots of the red mangrove, Rhizophora mangle, can cause death and subsequent breakage of the inhabited root and, debatably, may reduce the support system of the tree. We examined whether different characteristics of a root or its physical setting, both of which...

journal_title：Oecologia

authors： Brooks AR,Bell SS

更新日期：2001-05-01 00:00:00

abstract：:Naïveté can occur within any novel antagonistic interaction, and competitive forces play a fundamental role in shaping community structure, yet competitive naïveté has received very little attention in the literature to date. Naïveté towards a novel competitor is unlikely to result in immediate mortality, but could po...

journal_title：Oecologia

authors： Heavener SJ,Carthey AJ,Banks PB

更新日期：2014-05-01 00:00:00

abstract：:Ovipositing females of the cynipid waspPseudeucoila bochei discriminate between parasitized and unparasitized hosts, which results in a far more uniform distribution of eggs over the hosts than would be obtained if oviposition were random (Fig. 1,a 0-f 0).For the description of the distributions a few models were work...

journal_title：Oecologia

authors： Bakker K,Eijsackers HJ,van Lenteren JC,Meelis E

更新日期：1972-03-01 00:00:00

abstract：:Invasive species-species that have successfully overcome the barriers of transport, introduction, establishment, and spread-are a risk to biodiversity and ecosystem function. Introduction effort is one of the main factors underlying invasion success, but life history traits are also important as they influence populat...

journal_title：Oecologia

authors： van der Marel A,Waterman JM,López-Darias M

更新日期：2021-01-22 00:00:00

abstract：:The tenets of optimal foraging theory are used to contrast the behavior of the predatory snail Acantina spirata when feeding on the barnacles Balanus glandula and Chthamalus fissus under conditions of satiation and starvation. As predicted in optimal diet models, A. spirata is less selective (ratio of attack frequency...

journal_title：Oecologia

authors： Perry DM

更新日期：1987-06-01 00:00:00

abstract：:Male dragonflies of the species Aeschna cyanea pay several visits per day to a suitable pond in search of mates. The influence of the population density upon the daily duration of presence of single dragonfly males was investigated by means of multiple regression analysis. Several environmental factors were also consi...

journal_title：Oecologia

authors： Kaiser H

更新日期：1974-12-01 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：:Gas exchange characteristics of droughted and rewatered Portulacaria afra were studied during the seasonal shift from CAM to C3 photosynthesis. 14CO2 uptake, stomatal conductance, and total titratable acidity were determined for both irrigated and 2, 4, and 7.5 month waterstressed plants from summer 1984 to summer 198...

journal_title：Oecologia

authors： Guralnick LJ,Ting IP

更新日期：1986-08-01 00:00:00

abstract：:Food density, degree of hunger prior to foraging, and food processing difficulty were varied in order to determine their effects on the diet diversity of captive Peromyscus leucopus foraging for buried seeds. No relationship was found between diet diversity and food density. However, diet diversity exhibited a signifi...

journal_title：Oecologia

authors： Ebersole JP,Wilson JC

更新日期：1980-07-01 00:00:00

abstract：:This paper describes the epiphytic lichen vegetation on maple trees along an 1.1-km avenue leading from the outer suburbs of Freiburg toward the city center. A special aim of this investigation was to examine the variation in the coverage by lichens altogether and by each lichen species as a function of increasing dis...

journal_title：Oecologia

authors： Wirth V,Brinckmann B

更新日期：1977-03-01 00:00:00

abstract：:Common generalizations concerning the ecologic significance of C4 photosynthesis were tested in a study of plant gas exchange, productivity, carbon balance, and water use in monospecific communities of C3 and C4 salt desert shrubs. Contrary to expectations, few of the hypotheses concerning the performance of C4 specie...

journal_title：Oecologia

authors： Caldwell MM,White RS,Moore RT,Camp LB

更新日期：1977-12-01 00:00:00

abstract：:Predators attack and plants defend, so herbivores face the dilemma of how to eat enough without being eaten. But do differences in the personality of herbivores affect the foraging choices of individuals? We explored the ecological impact of personality in a generalist herbivore, the brushtail possum (Trichosurus vulp...

journal_title：Oecologia

authors： Mella VS,Ward AJ,Banks PB,McArthur C

更新日期：2015-01-01 00:00:00

abstract：:The amount of calcium in Eucalyptus diversicolor (karri) ecosystems is high in comparison with other eucalypt forest ecosystems in Australia. A large proportion of this calcium is present as crystalline Ca oxalate. Whewellite (CaC2O4·H2O) accumulates in leaf tissue of the over- and understorey species. Up to 70% of th...

journal_title：Oecologia

authors： O'Connell AM,Malajczuk N,Gailitis V

更新日期：1983-02-01 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：: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：:Adaptations to aridity of the reedfrog Hyperolius viridiflavus nitidulus, living in different parts of the season-ally very dry and hot West African savanna, are investigated. 1. During the dry season mainly juveniles (weighing 200-600 mg) were found in the field. A very low rate of evaporative water loss (EWL; about ...

journal_title：Oecologia

authors： Geise W,Linsenmair KE

更新日期：1986-03-01 00:00:00

abstract：:Plasticity in life-history characteristics was investigated in three populations of Plantago major L. ssp. pleiosperma (Pilger), a self-compatible, wind pollinated species with a high self-fertilization rate. The populations studied were selected for their marked differences in biomass accumulation and habitat charact...

journal_title：Oecologia

authors： Lotz LA,Blom CW

更新日期：1986-04-01 00:00:00

abstract：:By altering the strength of intra- and interspecific competition, droughts may reshape plant communities. Furthermore, species may respond differently to drought when other influences, such as herbivory, are considered. To explore this relationship, we conducted a greenhouse experiment measuring responses to inter- an...

journal_title：Oecologia

authors： Napier JD,Mordecai EA,Heckman RW

更新日期：2016-06-01 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：:Ecologists have long debated the role of predation in mediating the coexistence of prey species. Theory has mainly taken a bitrophic perspective that excludes the effects of inducible defenses at different trophic levels. However, inducible defenses could either limit or enhance the effects of predation on coexistence...

journal_title：Oecologia

authors： van der Stap I,Vos M,Tollrian R,Mooij WM

更新日期：2008-10-01 00:00:00

abstract：:Tests of density dependent regulation of population size depend on the concept of equilibrium population size. Such an equilibrium is a purely theoretical construct whose existence in the field is debatable and whose value cannot be measured. An equilibrium is supposed to fluctuate in time, but the extent of the fluct...

journal_title：Oecologia

authors： Wolda H

更新日期：1989-11-01 00:00:00

abstract：:We modeled the dynamics of a metapopulation of the land snail Arianta arbustorum in north-eastern Switzerland to investigate the effect of population subdivision on the persistence of a land snail metapopulation and to analyze the interaction between spatial factors, population subdivision, and catastrophes. We develo...

journal_title：Oecologia

authors： Akçakaya HR,Baur B

更新日期：1996-03-01 00:00:00

abstract：:Relationships between fine root growth, rates of litter decomposition and nutrient release were analysed in a mixed forest on Tierra Firme, a Tall Amazon Caatinga and a Low Bana on podsolized sands near San Carlos de Rio Negro. Fine root growth in the upper soil layers (root mat+10 cm upper soil) was considerably high...

journal_title：Oecologia

authors： Cuevas E,Medina E

更新日期：1988-07-01 00:00:00

abstract：:The community structure of sedentary organisms is largely controlled by the outcome of direct competition for space. Understanding factors defining competitive outcomes among neighbors is thus critical for predicting large-scale changes, such as transitions to alternate states within coral reefs. Using a spatially exp...

journal_title：Oecologia

authors： Sandin SA,McNamara DE

更新日期：2012-04-01 00:00:00

abstract：:This study investigated seasonal variation in the origin of water used by plants in a riparian tropical rainforest community and explored linkages between plant water source, plant xylem hydraulic conductivity and response to the onset of dry conditions. The study focused on five co-dominant canopy species, comprising...

journal_title：Oecologia

authors： Drake PL,Franks PJ

更新日期：2003-11-01 00:00:00

abstract：:To estimate the optimality of brood size, it is essential to study the effects of brood size manipulation on offspring survival and reproductive success. Moreover, testing the generality of the hypothesis of reproductive costs requires experimental data from a diversity of organisms. Here I present data on the growth,...

journal_title：Oecologia

authors： Koskela E

更新日期：1998-07-01 00:00:00

abstract：:It is important to understand the role that different predators can have to be able to predict how changes in the predator assemblage may affect the prey community and ecosystem attributes. We tested the effects of different stream predators on macroinvertebrates and ecosystem attributes, in terms of benthic algal bio...

journal_title：Oecologia

authors： Nilsson E,Olsson K,Persson A,Nyström P,Svensson G,Nilsson U

更新日期：2008-10-01 00:00:00

abstract：:Microtus duodecimcostatus in a mediterranean vole which is not known to display spectacular increases in population numbers as in some microtine species. A population was studied in southern France with a capture-recapture method. The population included resident adults which have a high and constant survival rate (mo...

journal_title：Oecologia

authors： Paradis E,Guédon G

更新日期：1993-03-01 00:00:00