Relationships of leaf diffusion resistance of Populus clones to leaf water potential and environment.

abstract：:When heterospecific seabirds are part of a nesting colony, there may be less opportunity for conspecifics to come in direct contact with each other, resulting in lower intraspecific aggressiveness. To determine if individuals spend less time in aggressive behavior when nesting in conspecific rather than heterospecific...

journal_title：Oecologia

authors： Pius SM,Leberg PL

更新日期：1997-06-01 00:00:00

abstract：:Resource partitioning of diet and habitat use was studied in the entire Amazonian ungulate community of Northeastern Peru, which comprises the red brocket deer (Mazama americana), grey brocket deer (M. gouazoubira), collared peccary (Tayassu tajacu), white-lipped peccary (T. pecari), and lowland tapir (Tapirus terrest...

journal_title：Oecologia

authors： Bodmer RE

更新日期：1991-01-01 00:00:00

abstract：:1. There is a well-defined time sequence in the oxygen consumption of Porcellio scaber. A maximal rate (the 'active rate') is obtained in woodlice subjected to the maximal disturbance of food presentation, handling and light. After initial exploratory activity has ceased, the oxygen consumption declines through a seri...

journal_title：Oecologia

authors： Newell RC,Wieser W,Pye VI

更新日期：1974-03-01 00:00:00

abstract：:Individual species can have profound effects on ecological communities, but, in hyperdiverse systems, it can be challenging to determine the underlying ecological mechanisms. Simplifying species' responses by trophic level or functional group may be useful, but characterizing the trait structure of communities may be ...

journal_title：Oecologia

authors： Rogy P,Hammill E,Smith MA,Rost-Komiya B,Srivastava DS

更新日期：2020-04-01 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：:As an extension of earlier investigations, the mating calls ofHyla arborea kretensis, Hyla a. molleri, andHyla a. sarda were studied, and variations in the calls with air temperature were determined. The mating calls of these species exhibit the typical structure, made up of short pulses of varying amplitude. The call...

journal_title：Oecologia

authors： Schneider H

更新日期：1974-03-01 00:00:00

abstract：:Many global change drivers chronically alter resource availability in terrestrial ecosystems. Such resource alterations are known to affect aboveground net primary production (ANPP) in the short term; however, it is unknown if patterns of response change through time. We examined the magnitude, direction, and pattern ...

journal_title：Oecologia

authors： Smith MD,La Pierre KJ,Collins SL,Knapp AK,Gross KL,Barrett JE,Frey SD,Gough L,Miller RJ,Morris JT,Rustad LE,Yarie J

更新日期：2015-04-01 00:00:00

abstract：:Despite the abundance of studies on competitive interactions, relatively few experiments have been used to fit explicit competition models and estimate competition coefficients. Such estimates are valuable for making contact between theoretical and empirical studies, which tend to measure competition in different unit...

journal_title：Oecologia

authors： Inouye BD

更新日期：1999-09-01 00:00:00

abstract：:Juvenile habitat use and early life migratory behaviors of successfully recruited adult fish provide unique insight into critical habitats for a population, and this information allows restoration plans to be tailored to maximize benefits. Retrospective analysis of adult otolith chemistry combined with fish-otolith gr...

journal_title：Oecologia

authors： Turner SM,Limburg KE

更新日期：2016-01-01 00:00:00

abstract：:Long-termed fumigation of pea seedlings with SO2 caused typical alterations of the concentration of free glutamate and glutamine as well as fluctuations of the activity of glutamate dehydrogenase and glutamine synthetase. Shortly after the beginning of the fumigation with low concentrations of SO2 (up to 0,3 ppm) the ...

journal_title：Oecologia

authors： Jäger HJ,Pahlich E

更新日期：1972-06-01 00:00:00

abstract：:The physiological activity and C and N allocation of beech seedlings planted in two different beech forest soils (acid brown earth, rendzina) were studied over 80 days. One adult earthworm Octolasion lacteum (Örley) was placed in half of the containers. Transpiration, CO2, assimilation, chlorophyll synthesis and N inc...

journal_title：Oecologia

authors： Wolters V,Stickan W

更新日期：1991-09-01 00:00:00

abstract：:Increased biological diversity due to invasion by non-indigenous species (NIS) is a global phenomenon with potential effects on trophic interactions and ecosystem processes in the invaded habitat. We assessed the effects of resource availability and invasion of three non-indigenous invertebrate grazers (two crustacean...

journal_title：Oecologia

authors： Wikström SA,Hillebrand H

更新日期：2012-01-01 00:00:00

abstract：:Reproduction is a demanding activity for animals, since they must produce, and in some cases protect and provision, their young. It is often overlooked that demands of reproduction may also be exacerbated by exposure to contaminants. In this study, we make use of an exceptional long-term dataset to perform a cross-sec...

journal_title：Oecologia

authors： Costantini D,Meillère A,Carravieri A,Lecomte V,Sorci G,Faivre B,Weimerskirch H,Bustamante P,Labadie P,Budzinski H,Chastel O

更新日期：2014-08-01 00:00:00

abstract：:The duration times of the eggs, nauplii and copepodites of Cyclops vicinus and Eudiaptomus gracilis were obtained, by experiment, at 5, 10, 15 and 20°C. In contrast with previously published work on copepod development, the ovigerous females, used in the cultures at these temperatures, were removed from a water storag...

journal_title：Oecologia

authors： Munro IG

更新日期：1974-12-01 00:00:00

abstract：:To investigate the factors that influence prey utilization among predators with active prey, three series of experiments were performed in which Ural owls (Strix uralensis) searched for and attacked three prey species of wild mice, Microtus montebelli, Apodemus speciosus, and A. argenteus, in a large flight cage. Over...

journal_title：Oecologia

authors： Nishimura K,Abe MT

更新日期：1988-11-01 00:00:00

abstract：:For some animals, the habitat which they first experience can influence the type of habitat which they select later in life and, thus, potentially their population distribution and dynamics. However, for many insect herbivores, whose natal habitat may consist of a single hostplant, the consequences of natal hostplant ...

journal_title：Oecologia

authors： Merwin AC,Inouye BD,Underwood N

更新日期：2020-06-01 00:00:00

abstract：:Local adaptation and population differentiation of plants are well documented, but studies on interactions with natural enemies are rare. In particular, evidence for plant adaptation to the local biotic environment, such as herbivores remains poor. We used the black mustard Brassica nigra, an annual species of river v...

journal_title：Oecologia

authors： Bischoff A,Trémulot S

更新日期：2011-04-01 00:00:00

abstract：:Lemming populations are generally characterised by their cyclic nature, yet empirical data to support this are lacking for most species, largely because of the time and expense necessary to collect long-term population data. In this study we use the relative frequency of yearly willow scarring by lemmings as an index ...

journal_title：Oecologia

authors： Predavec M,Krebs CJ,Danell K,Hyndman R

更新日期：2001-01-01 00:00:00

abstract：:The apparent energy of activation (E a), Michaelis-Menten constant (K mfor oxaloacetate), V max/K mratios and specific activities of NADP+-malate dehydrogenase (NADP+-MDH; EC 1.1.1.82) were analyzed in plants of Barnyard grass from Québec (QUE) and Mississippi (MISS) acclimated to two thermoperiods 28/22°C, 21/15°C, a...

journal_title：Oecologia

authors： Simon JP,Potvin C,Strain BR

更新日期：1989-10-01 00:00:00

abstract：:The hypothesis that cooperative breeding entails a cost in terms of transmission of ectoparasites was tested by a comparative analysis among sympatric Australian passerines. The general trend found using the allometry method and outgroup analysis indicates that contagious ectoparasites are not more common on cooperati...

journal_title：Oecologia

authors： Poiani A

更新日期：1992-12-01 00:00:00

abstract：:Dramatic perturbations of ecological communities through rapid shifts in environmental regime do not always result in complete mortality of residents. Instead, legacy individuals may remain and influence the succession and composition of subsequent communities. We used a reciprocal transplant experiment to investigate...

journal_title：Oecologia

authors： Mullineaux LS,Micheli F,Peterson CH,Lenihan HS,Markus N

更新日期：2009-08-01 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：: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：:We measured the response of dark respiration (R(d)) to temperature and foliage characteristics in the upper canopies of tree species in temperate rainforest communities in New Zealand along a soil chronosequence (six sites from 6 years to 120,000 years). The chronosequence provided a vegetation gradient characterised ...

journal_title：Oecologia

authors： Turnbull MH,Tissue DT,Griffin KL,Richardson SJ,Peltzer DA,Whitehead D

更新日期：2005-03-01 00:00:00

abstract：:Recent research has shown that many mutualistic communities display non-random structures. While our understanding of the structural properties of mutualistic communities continues to improve, we know little of the biological variables resulting in them. Mutualistic communities include those formed between ants and ex...

journal_title：Oecologia

authors： Chamberlain SA,Kilpatrick JR,Holland JN

更新日期：2010-11-01 00:00:00

abstract：:Desert annuals of Death Valley, California have higher average light-saturated photosynthetic capacities and leaf nitrogen contents than do early-successional annuals of Illinois. The leaves of annuals in the light-unlimited Death Valley environment change little in specific weight, nitrogen, or photosynthetic capacit...

journal_title：Oecologia

authors： Mooney HA,Field C,Gulmon SL,Bazzaz FA

更新日期：1981-08-01 00:00:00

abstract：:Most models of parental investment in offspring assume a trade-off between propagule size and number, and an increasing "concave down" function relating offspring fitness to propagule size. In this study, we test these two fundamental assumptions, using three closely related species of crickets, Gryllus firmus, G. vel...

journal_title：Oecologia

authors： Carrière Y,Roff DA

更新日期：1995-06-01 00:00:00

abstract：:The effects of hydraulic disturbances on the impact of two predatory benthic invertebrates on their prey were examined in a stream at two distinct spatial scales. At the scale of small habitat patches (0.0625 m2), hydraulic patch type was an important determinant of the microdistribution of prey and predators. Prey ab...

journal_title：Oecologia

authors： Lancaster J

更新日期：1996-08-01 00:00:00

abstract：:In this study we tested the hypothesis that the presence of chemical stimuli from a hungry predator would initiate anti-predator responses, while stimuli from a satiated predator would not. We used chemical stimuli released from starved perch (Perca fluviatilis) and from satiated perch (predator). As prey we used adul...

journal_title：Oecologia

authors： Åbjörnsson K,Wagner BM,Axelsson A,Bjerselius R,Olsén KH

更新日期：1997-07-01 00:00:00

abstract：:Reptile ticks mate while females are attached to their host. Following mating, females engorge, detach and then lay their eggs. This study examines whether the time that females of the reptile tick Amblyomma limbatum spend on hosts prior to mating and the time they take to engorge on hosts after mating influence their...

journal_title：Oecologia

authors： Chilton NB,Andrews RH,Bull CM

更新日期：1993-05-01 00:00:00