Energetic consequences of an inducible morphological defence in crucian carp.

abstract：:The development of the ant communities and their foraging dynamics were studied in two annual agroecosystems of the Mexican tropical lowlands: a "forest milpa" of corn, beans, and squash made by cutting and buring 40-year-old forest, and a "field milpa" of corn, beans, and squash made by plowing 1-year-old second grow...

journal_title：Oecologia

authors： Risch SJ,Carroll CR

更新日期：1982-10-01 00:00:00

abstract：:Occurrence and diet of ten carnivorous predators (four falconiforms, four owls, and two foxes), and population levels of their mammalian prey, were monitored over 45 months at a semi-arid site in north-central Chile. Early in this period, small mammals irrupted and then declined markedly to a density 7% of that at pea...

journal_title：Oecologia

authors： Jaksié FM,Jiménez JE,Castro SA,Feinsinger P

更新日期：1992-01-01 00:00:00

abstract：:Disturbances reduce the biota in stream ecosystems, and leave biological legacies, including remnant species, which potentially influence post-disturbance community development but are poorly understood. We investigated whether three remnant species, the snail Radix peregra, the mayfly Serratella ignita and the freshw...

journal_title：Oecologia

authors： Ledger ME,Harris RM,Milner AM,Armitage PD

更新日期：2006-07-01 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：:Weight losses from sweet chestnut and beech leaves, attributable to biotic and abiotic breakdown processes, leaching and microbial decomposition have been studied using tethered leaves and litter bags. The experimental sites were two adjacent areas of deciduous woodland. In one area (the Castanea site) a mor-like mode...

journal_title：Oecologia

authors： Anderson JM

更新日期：1973-09-01 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：:1. The locomotor activity of European salamanders differs from species to species. At all stages of development Triturus vulgaris is more light-active, Salamandra salamandra is dark-active, while Triturus alpestris and cristatus occupy an intermediate position. 2. The activity of the larvae is high but the rhythm is n...

journal_title：Oecologia

authors： Himstedt W

更新日期：1971-06-01 00:00:00

abstract：:In this study we examine the influence of temperature on growth, photosynthetic performance and acclimation of two submerged macrophyte species, Elodea canadensis L.C. Rich and Ranunculus aquatilis (L.) Wimmer. The plants were grown at 5, 10 and 15°C and a photon flux density of 300 μmol m-2 s-1 (PAR) in a medium with...

journal_title：Oecologia

authors： Madsen TV,Brix H

更新日期：1997-04-01 00:00:00

abstract：:Vallisneria americana was grown for six weeks in a greenhouse on relatively fertile sediment to test for factors other than nutrient limitation which may slow growth of this submersed macrophyte at pH 5. On the basis of dry mass accumulated, (1) low pH significantly depressed Vallisneria growth at constant free CO2 le...

journal_title：Oecologia

authors： Titus JE,Feldman RS,Grisé D

更新日期：1990-10-01 00:00:00

abstract：:The duration and amount of water captured on leaves and its functional significance is highly varied. Leaf surface wettability influences water absorption, gas exchange, pathogen infection, nutrient leaching, contamination by pollutants, self-cleaning properties and in freezing environments the probability of extrinsi...

journal_title：Oecologia

authors： Aryal B,Neuner G

更新日期：2010-01-01 00:00:00

abstract：:We investigated the effect of increased N-supply on productivity and potential litter decay rates of Carex species, which are the dominant vascular plant species in peatlands in the Netherlands. We hypothesized that: (1) under conditions of N-limited plant growth, increased N-supply will lead to increased productivity...

journal_title：Oecologia

authors： Aerts R,van Logtestijn R,van Staalduinen M,Toet S

更新日期：1995-12-01 00:00:00

abstract：:Classical resource- and the less studied ratio-dependent models of predator-prey relationships provide divergent predictions as to the sustained ecological effects of bottom-up forcing. While resource-dependent models, which consider only instantaneous prey density in modelling predator responses, predict community re...

journal_title：Oecologia

authors： Bishop MJ,Kelaher BP,Smith MP,York PH,Booth DJ

更新日期：2006-10-01 00:00:00

abstract：:The extent of the response of plant growth to atmospheric CO2 enrichment depends on the availability of resources other than CO2. An important growth-limiting resource under field conditions is nitrogen (N). N may, therefore, influence the CO2 response of plants. The effect of elevated CO2 (60 Pa) partial pressure (pC...

journal_title：Oecologia

authors： Zanetti S,Hartwig UA,van Kessel C,Lüscher A,Hebeisen T,Frehner M,Fischer BU,Hendrey GR,Blum H,Nösberger J

更新日期：1997-09-01 00:00:00

abstract：:The parasitoids known to attack 191 phytophagous species of gall midges (Cecidomyiidae) were used to examine factors influencing parasitoid assemblage size. The number of parasitoid species a midge species supports was tested against nine variables describing geographical, biological and ecological attributes of hosts...

journal_title：Oecologia

authors： Hawkins BA,Gagné RJ

更新日期：1989-10-01 00:00:00

abstract：:A two year comparative field water relations study was conducted in central Maryland on three sympatric temperate lianas, Lonicera japonica, Vitis vulpina and Parthenocissus quinquefolia. Seasonal physiological activity was longer by approximately 9 weeks in the evergreen L. japonica, while peak rates of stem elongati...

journal_title：Oecologia

authors： Bell DJ,Forseth IN,Teramura AH

更新日期：1988-01-01 00:00:00

abstract：:When testing census data of insect populations for regulation, and/or for overall density dependence in the course of numbers over years, certain conditions, which follow from the testing models, should be fulfilled. Even if the series of densities may be considered a piece of first-order Markov chain (a necessary con...

journal_title：Oecologia

authors： Den Boer PJ

更新日期：1990-05-01 00:00:00

abstract：:Predation by Saduria entomon on the depositfeeding amphipods Monoporeia (=Pontoporeia) affinis and Pontoporeia femorata was studied in laboratory experiments. Prey vulnerabilities were compared in singleprey treatments and in mixed-prey treatments, where the proportions of the two species were varied at one total dens...

journal_title：Oecologia

authors： Hill C,Elmgren R

更新日期：1992-08-01 00:00:00

abstract：:We tested several assumptions and predictions of host-quality-dependent sex allocation theory (Charnov et al. 1981) with data obtained for the parasitoid Metaphycus stanleyi Compere on its host, brown soft scale (Coccus hesperidum L.), in a California citrus grove and in the laboratory. Scales ceased growing after par...

journal_title：Oecologia

authors： Bernal JS,Luck RF,Morse JG

更新日期：1998-10-01 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

abstract：:A traditional view of diverse floral traits is that they reflect differences in foraging preferences of pollinators. The role of pollinators in the evolution of floral traits has been questioned recently by broad community surveys, especially studies concerning variation in pollinator assemblages and visitation freque...

journal_title：Oecologia

authors： Gong YB,Huang SQ

更新日期：2011-07-01 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：: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：:Coryphantha vivipara (Nutt.) Britton & Rose var. deserti (Engelm.) W.T. Marshall (Cactaceae) survived snow and tissue temperatures of-12°C in southern Nevada. However, the freezing point depression of the cell sap was only about 0.9°C. When the nocturnal air temperature in the laboratory was reduced from 10°C to-10°C ...

journal_title：Oecologia

authors： Nobel PS

更新日期：1981-03-01 00:00:00

abstract：:Carbon allocation demands from root-nodulating nitrogen-fixing bacteria (NFB) can modulate the host plant's chemical phenotype, with strong bottom-up effects on herbivores. In contrast to well-studied rhizobia, the effects of other important NFB on plant chemistry and herbivory are much less understood. Here, combinin...

journal_title：Oecologia

authors： Ballhorn DJ,Elias JD,Balkan MA,Fordyce RF,Kennedy PG

更新日期：2017-06-01 00:00:00

abstract：:Leslie matrices are used to compare theoretical populations of gregarious and solitarious Desert Locusts, Schistocerca gregaria (Forsk.). Despite their lower fecundity, the synchrony and faster maturation of gregarious populations permit them to have much faster rates of increase than solitarious populations. When rea...

journal_title：Oecologia

authors： Cheke RA

更新日期：1978-01-01 00:00:00

abstract：:In highly dynamic and unpredictable environments such as the Southern Ocean, species that have evolved behaviors that reduce the effects of intra-specific competition may have a selective advantage. This is particularly true when juveniles face disadvantages when foraging due to morphological or physiological limitati...

journal_title：Oecologia

authors： Field IC,Bradshaw CJ,Burton HR,Sumner MD,Hindell MA

更新日期：2005-01-01 00:00:00

abstract：:By analogy with deterministic stability, the stability of stochastic ecological systems can be viewed as a tendency for population densities to avoid dynamic boundaries (i.e. boundedness) or to approach a dynamic attractor (i.e. attraction). At the population level, these two views generate predictions consistent with...

journal_title：Oecologia

authors： Crowley PH

更新日期：1992-05-01 00:00:00

abstract：:While foliar photosynthetic relationships with light, nitrogen, and water availability have been well described, environmental factors driving vertical gradients of foliar traits within forest canopies are still not well understood. We, therefore, examined how light availability and vapour pressure deficit (VPD) co-de...

journal_title：Oecologia

authors： Bachofen C,D'Odorico P,Buchmann N

更新日期：2020-02-01 00:00:00

abstract：:This study examines the oviposition response of a specialist weevil (Mogulones larvatus) to patches of its host, the noxious weed Paterson"s curse/salvation Jane (Echium plantagineum). We simultaneously examined the effect of patch size and plant density (and their interaction), on the recorded oviposition patterns. O...

journal_title：Oecologia

authors： Shea K,Smyth M,Sheppard A,Morton R,Chalimbaud J

更新日期：2000-09-01 00:00:00

abstract：:The use of stable isotopes to infer diet requires quantifying the relationship between diet and tissues and, in particular, knowing of how quickly isotopes turnover in different tissues and how isotopic concentrations of different food components change (discriminate) when incorporated into consumer tissues. We used f...

journal_title：Oecologia

authors： Pearson SF,Levey DJ,Greenberg CH,Martínez Del Rio C

更新日期：2003-05-01 00:00:00