Dispersal ability and relative abundance of Boeckella and Calamoecia (Copepoda: Calanoida) in Australian and New Zealand waters.

abstract：:Carbon allocation among bunchgrass tillers was examined with carbon-11 (11CO2) steady state labelling. Labelled carbon was continuously transported from parent tillers to anatomically attached daughter tillers at a time when morphological characteristics indicated that tiller maturation had occurred. Steady state leve...

journal_title：Oecologia

authors： Welker JM,Rykiel EJ Jr,Briske DD,Goeschl JD

更新日期：1985-09-01 00:00:00

abstract：:An automated, fiber optic point quadrat system for vegetation sampling is described. Because the effective point diameter of this system never exceeds 25 μm it minimizes the substantial errors which can arise with conventional point quadrats. Automatic contact detection eliminates operator subjectivity, and permits wo...

journal_title：Oecologia

authors： Caldwell MM,Harris GW,Dzurec RS

更新日期：1983-09-01 00:00:00

abstract：:The study illustrates the ecological determinants and evolutionary consequences of dispersal in the pond-living water beetle Dineutus assimilis (Coleoptera: Gyrinidae). Over 2 years, local populatiopn dynamics were studied in 51 ponds within a 60-km2 study area. In most of the 31 occupied ponds, and even in large popu...

journal_title：Oecologia

authors： Nürnberger B

更新日期：1996-05-01 00:00:00

abstract：:Seed predation in relation to patterns of pod (and seed) distribution was examined in five samples of the common milkweed (Asclepias syriaca L.), in tests of the "resource-concentration" effect both within- and beween-plants. The proportion of pods in a cluster that were attacked, particularly by the weevil Rhyssomatu...

journal_title：Oecologia

authors： Franson SE,Willson MF

更新日期：1983-09-01 00:00:00

abstract：:Mark-release-recapture techniques were adapted for studying the territorial black swallowtail butterfly, Papitio polyxenes. Population sizes were similar from year to year and somewhat higher in second broods. The overall sex ratio was a male-biased 4.0:1. Of 340 marked males, 45.3% were recaptured an average of 5.7 t...

journal_title：Oecologia

authors： Lederhouse RC

更新日期：1983-09-01 00:00:00

abstract：:This paper discusses the interactions among prefire shrub abundance, soil moisture, and plant and animal species on postfire seedling establishment in mixed chparral in southern California. Postfire germination and survival of seedlings in a stand dominated by a facultative seeder (Adenostoma fasciculatum) and by an o...

journal_title：Oecologia

authors： Moreno JM,Oechel WC

更新日期：1992-04-01 00:00:00

abstract：:Myrmecophytic symbioses are widespread in tropical ecosystems and their diversity makes them useful tools for understanding the origin and evolution of mutualisms. Obligate ant-plants, or myrmecophytes, provide a nesting place, and, often, food to a limited number of plant-ant species. In exchange, plant-ants protect ...

journal_title：Oecologia

authors： Orivel J,Lambs L,Malé PJ,Leroy C,Grangier J,Otto T,Quilichini A,Dejean A

更新日期：2011-02-01 00:00:00

abstract：:Hybridisation is common in plants and can affect the genetic diversity and ecology of sympatric parental populations. Hybrids may resemble the parental species in their ecology, leading to competition and/or gene introgression; alternatively, they may diverge from the parental phenotypes, possibly leading to the colon...

journal_title：Oecologia

authors： Chartier M,Liagre S,Weiss-Schneeweiss H,Kolano B,Bessière JM,Schönenberger J,Gibernau M

更新日期：2016-02-01 00:00:00

abstract：:Soils of three Picea mariana-Cladina stellaris woodland sites, aged 2, 104 and 137 years after fire, were sampled at 3 cm intervals to 9 cm depth for soil microfungi. Mortierella, Mucor, Penicillium and Trichoderma were the most frequently isolated genera. The species composition of the microfungi remained much the sa...

journal_title：Oecologia

authors： Lucarotti CJ,Kelsey CT,Auclair AN

更新日期：1978-01-01 00:00:00

abstract：:We have investigated interspecific interactions between larvae of the 3 native British anurans, Rana temporaria, Bufo bufo and B. calamita in the field and in the laboratory. Over a 3 year period, predation of B. calamita spawn by the two competitively superior species accounted for only 0.3-3.0% of the total deposite...

journal_title：Oecologia

authors： Banks B,Beebee TJ

更新日期：1987-07-01 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：:At least once a year the mountain pine beetle searches for lodgepole pines that provide a suitable habitat for a new brood. After attacking females feed, they produce an attractant pheromone that causes beetles to aggregate and, during outbreaks, to usually mass attack the "focus" tree. Near the completion of mass att...

journal_title：Oecologia

authors： Geiszler DR,Gallucci VF,Gara RI

更新日期：1980-01-01 00:00:00

abstract：CONCLUSION:For the abovementioned reasons, and with all due respect to the scholarship of Mansson and McGlade, who display a deep knowledge of thermodynamics and ecology, I cannot agree that Odum's use of energy concepts is "wholly discredited". Refinements from microscopic thermodynamics may not have been faithfully c...

journal_title：Oecologia

authors： Patten BC

更新日期：1993-04-01 00:00:00

abstract：:Estuarine assemblages of fishes and natant decapod crustaceans (i.e. nekton) comprise both permanent resident species and juveniles of coastal marine species that use estuaries primarily as nurseries. In an attempt to understand how the young of marine species successfully invade communities of permanent estuarine res...

journal_title：Oecologia

authors： Kneib RT,Knowlton MK

更新日期：1995-09-01 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：:In a tropical environment near the equator in Nairobi, Kenya, flesh fly development is nearly continuous throughout the year with only a few individuals being channeled into pupal diapause during the coldest months. Two species reared in a field cage completed 7 generations/year. Generation time for nondiapause flies ...

journal_title：Oecologia

authors： Denlinger DL

更新日期：1978-01-01 00:00:00

abstract：:This is the first in a series of papers on the growth, photosynthetic rate, water and nutrient relations, root distribution and mycorrhizal frequency of two Norway spruce forests at different stages of decline. One of the stands was composed of green trees only while the other included trees ranging in appearance from...

journal_title：Oecologia

authors： Oren R,Schulze E-,Werk KS,Meyer J,Schneider BU,Heilmeier H

更新日期：1988-02-01 00:00:00

abstract：:Temperature regulation and oxygen consumption were examined in two species of grasshoppers: Melanoplus sanguinipes from cold alpine tundra at elevation 3,800 m, and Trimerotropis pallidipennis from hot desert habitats at elevation 250 m. Both species utilized behavioral thermoregulation to keep body temperature (T b )...

journal_title：Oecologia

authors： Chappell MA

更新日期：1983-01-01 00:00:00

abstract：:We report a field study of the haematocrit of pied flycatcher (Ficedula hypoleuca) nestlings when close to fledging. First a descriptive study was conducted of both fledgling and adult haematocrit over 2 years to analyse correlates of variation in this trait. Then a swapping experiment was performed to see whether var...

journal_title：Oecologia

authors： Potti J,Moreno J,Merino S,Frías O,Rodríguez R

更新日期：1999-07-01 00:00:00

abstract：:The habitats occupied by species of wood warblers (Emberizidae) were compared at two study areas, Itasca State Park, Minnesota and Mount Blue State Park, Maine. Univariate comparisons of each variable of habitat structure show geographic differences for each species of warbler. Habitats available were also different b...

journal_title：Oecologia

authors： Collins SL

更新日期：1983-09-01 00:00:00

abstract：:The regularly inundated region of the middle Amazon river together with its marginal lakes is characterized by special hydrographic, hydrochemical and biological conditions [1-4]. It is called "Várzea". Regular investigations of such Várzea lakes revealed several correlations between changes in water level, thermic an...

journal_title：Oecologia

authors： de Menezes Santos U

更新日期：1973-09-01 00:00:00

abstract：:The palatability of 14 species of woody plant was assessed for three species of browsing ruminant, namely kudus, impalas and goats. Results show that palatability was most clearly related to leaf contents of condensed tannins. The effect was a threshold one, with all plants containing more than 5% condensed tannins be...

journal_title：Oecologia

authors： Cooper SM,Owen-Smith N

更新日期：1985-08-01 00:00:00

abstract：:The effects of a number of factors, notably leaf mining insects, on the longevity of beech and holm oak leaves have been studied. The regular monitoring of individually labelled leaves was complemented by analysis of leaf fall data. Both methods confirm that these mining insects have only a slight impact on their host...

journal_title：Oecologia

authors： Pritchard IM,James R

更新日期：1984-09-01 00:00:00

abstract：:Intraspecific and intrasexual variation in home range size, body mass and ecological productivity is examined in three selected species of Carnivora (Felis rufus: Canis latrans; Ursus americanus), reflecting different diets. We then compare the intraspecific results with prior cross-species studies. Home range size an...

journal_title：Oecologia

authors： Gompper ME,Gittleman JL

更新日期：1991-09-01 00:00:00

abstract：:Adaptive within-clutch allocation of resources by laying females is an important focus of evolutionary studies. However, the critical assumption of these studies, namely that within-clutch egg-size deviations affect offspring performance, has been properly tested only rarely. In this study, we investigated effects of ...

journal_title：Oecologia

authors： Krist M,Remes V,Uvírová L,Nádvorník P,Bures S

更新日期：2004-06-01 00:00:00

abstract：:Small changes in environmental conditions can unexpectedly tip an ecosystem from one community type to another, and these often irreversible shifts have been observed in semi-arid grasslands, freshwater lakes and ponds, coral reefs, and kelp forests. A commonly accepted explanation is that these ecosystems contain mul...

journal_title：Oecologia

authors： Petraitis PS,Methratta ET,Rhile EC,Vidargas NA,Dudgeon SR

更新日期：2009-08-01 00:00:00

abstract：:The relation between daily maximal rates of net photosynthesis and plant water status was studied during a dry season on irrigated and non-irrigated, naturally growing, perennial wild plants.Species were examined which differ in phenology, leaf anatomy and morphology: Hammada scoparia, Artemisia herba-alba, Zygophyllu...

journal_title：Oecologia

authors： Schulze E-,Hall AE,Lange OL,Evenari M,Kappen L,Buschbom U

更新日期：1980-04-01 00:00:00

abstract：:The impact of the xylem-tapping mistletoe Phoradendron juniperinum on the nitrogen and water relations of its host Juniperus osteosperma was investigated under natural field conditions. Leaf conductance, leaf water potential, and leaf Kjeldahl nitrogen contents were followed through the growing season on mistletoes, i...

journal_title：Oecologia

authors： Ehleringer JR,Cook CS,Tieszen LL

更新日期：1986-01-01 00:00:00

abstract：:Estimates were made of the ecological fish production in two small lowland rivers uninhabited by salmonids. Eight sites were examined in the Utrata River drainage basin, and five in the Zalewka Brook. Nets were placed at the upper and lower limits of each site and fish were captured using electrofishing apparatus; at ...

journal_title：Oecologia

authors： Penczak T

更新日期：1981-02-01 00:00:00

abstract：:Future climate scenarios forecast a 10-50% decline in rainfall in Eastern Amazonia. Altered precipitation patterns may change important ecosystem functions like decomposition through either changes in physical and chemical processes or shifts in the activity and/or composition of species. We experimentally manipulated...

journal_title：Oecologia

authors： Rodríguez Pérez H,Borrel G,Leroy C,Carrias JF,Corbara B,Srivastava DS,Céréghino R

更新日期：2018-05-01 00:00:00