Age structure in Liatris acidota (Compositae).

abstract：:The effects of competitive suppression by vines on the non-vine plant community have received little attention in temperate habitats. This study investigated the impact vines have on their herbaceous hosts in a wetland community at two soil fertility levels. Plots in an oligohaline marsh were treated in a 2 × 2 factor...

journal_title：Oecologia

authors： Gough L,Grace JB

更新日期：1997-10-01 00:00:00

abstract：:Snail hosts of different ages constitute different resource environments for larval trematodes because each individual has a particular energy budget and energy allocation pattern at the time of infection. Effects of monomiracidial trematode infections on shell growth, body dry weight and reproductive effort of the sn...

journal_title：Oecologia

authors： Gérard C,Théron A

更新日期：1997-11-01 00:00:00

abstract：:In the tropical dry forest of the central Pacific coast of Mexico the pollination and reproductive success of the bombacaceous tree Ceiba grandiflora was negatively affected by habitat disruption. Two of the three bat species that function as effective pollinators for this species ( Glossophaga soricina and Musonycter...

journal_title：Oecologia

authors： Quesada M,Stoner KE,Rosas-Guerrero V,Palacios-Guevara C,Lobo JA

更新日期：2003-05-01 00:00:00

abstract：:Models incorporating the energetics of individual daphnids (Cladocera) have been developed to predict the effect of environmental variables, particularly food availability, on population dynamics. One of them, that of Kooijman (1986), assumes that all assimilated energy enters a storage compartment prior to use in pro...

journal_title：Oecologia

authors： Bradley MC,Perrin N,Calow P

更新日期：1991-05-01 00:00:00

abstract：:1. Aspects of colonization by freshwater invertebrates on artificial substrata (macrophyte models) placed in the benthos of a eutrophic lake were studied. 2. Colonization was rapid, with equilibrium occuring at about 35 days. The colonization rate curve decreased with time but extinction rate remained constant. 3. Pre...

journal_title：Oecologia

authors： Mason CF

更新日期：1978-01-01 00:00:00

abstract：:Regulation of seed germination phenology is an important aspect of the life history strategy of invading annual plant species. In the obligately selfing winter annual grass Bromus tectorum, seeds are at least conditionally dormant at dispersal in early summer and lose dormancy through dry-afterripening. Patterns of ge...

journal_title：Oecologia

authors： Meyer SE,Allen PS

更新日期：1999-07-01 00:00:00

abstract：:We report evidence from controlled experiments that long straight thorns deter herbivory by browsers. Cut branches of three woody species that had their thorns removed suffered significantly greater herbivory by a tethered goat than did paired intact branches. Branches on living Acacia seyal plants that had their thor...

journal_title：Oecologia

authors： Milewski AV,Young TP,Madden D

更新日期：1991-03-01 00:00:00

abstract：:The period between oviposition and the start of hatching varied from about 17 weeks at 3°C to about 1 week at 22°C, and the length of the hatching period varied from about 34 days at 3°C to about 3 days at 22°C. Regression equations are provided to estimate the lengths of both periods at all temperatures between 3°C a...

journal_title：Oecologia

authors： Elliott JM

更新日期：1972-03-01 00:00:00

abstract：:The effect of feeding of the mirid bug Capsodes infuscatus on fruit production of the geophyte Asphodelus ramosus was studied in a desert area in Israel. Plant and bug densities and percent loss of fruit production were measured in a relatively dry lower colluvial slope, an intermediate upper colluvial slope, and a re...

journal_title：Oecologia

authors： Ayal Y,Izhaki I

更新日期：1993-04-01 00:00:00

abstract：:Pycnogonum litorale has a terminal anecdysis. After attaining maturity it does not moult again. Maturity can be attained at different body size, the female usually being larger than the male.The pre-adult instar can also be entered at various body sizes. The duration of the pre-adult instar depends upon body size: At ...

journal_title：Oecologia

authors： Schmidt HW

更新日期：1971-09-01 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：:I tested hypotheses for ecological roles of storage carbohydrates in perennating organs (roots and branches) of alpine Oxytropis sericea, a leguminous herb. In naturally growing plants, total nonstructural carbohydrates achieved their maximal concentration in the fall, declined during winter, and reached minimal level...

journal_title：Oecologia

authors： Wyka T

更新日期：1999-08-01 00:00:00

abstract：:The co-occurrence of several species, all of which share similar resource requirements, remains a paradox in ecology. Here, I evaluated resource use along multiple environmental axes to understand the potential for niche partitioning and complementarity in a guild of suspension-feeding rocky shore invertebrates. I foc...

journal_title：Oecologia

authors： Bracken MES

更新日期：2020-06-01 00:00:00

abstract：:Plants of Diplacus aurantiacus, a successional shrub common in California chaparral, were grown under controlled conditions in which either quantum flux density or nitrogen availability was varied. Photosynthesis and leaf nitrogen content were determined on a leaf area and a leaf weight basis, and whole plant growth w...

journal_title：Oecologia

authors： Gulmon SL,Chu CC

更新日期：1981-05-01 00:00:00

abstract：:Early models of hostplant exploitation by phytophagous insects suffer from unwarranted assumptions and may not be generally applicable. Wordmodels of the co-evolutionary approach may assume unwarranted evolutionary stability in 'strategic' explanations, whilst mathematical models derived from earlier optimal-diet stud...

journal_title：Oecologia

authors： Courtney SP

更新日期：1982-01-01 00:00:00

abstract：:Stomata of paper birch (Betula papyrifera Marsh.) seedlings were more open at high humidity than at low humidity and responded rapidly to changes in vapor pressure deficit. SO2 at 0.2 or 0.8 μl l-1 caused partial stomatal closure. Seedlings fumigated with SO2 at 0.2 or 0.5 μl l-1 for 30 h or 0.2 μl l-1 for 75 h took u...

journal_title：Oecologia

authors： Norby RJ,Kozlowski TT

更新日期：1982-04-01 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：:Canopy CO2 concentrations in a tropical rainforest in French Guiana were measured continuously for 5 days during the 1994 dry season and the 1995 wet season. Carbon dioxide concentrations ([CO2]) throughout the canopy (0.02-38 m) showed a distinct daily pattern, were well-stratified and decreased with increasing heigh...

journal_title：Oecologia

authors： Buchmann N,Guehl JM,Barigah TS,Ehleringer JR

更新日期：1997-03-01 00:00:00

abstract：:Climate-mediated shifts in species' phenologies are expected to alter species interactions, but predicting the consequences of this is difficult because phenological shifts may be driven by different climate factors that may or may not be correlated. Temperature could be an important factor determining effects of phen...

journal_title：Oecologia

authors： Rudolf VH,Singh M

更新日期：2013-11-01 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：:We determined in the laboratory the feeding response of two populations of the generalist herbivorous snail Arianta arbustorum (Helicidae) towards the composite Adenostyles alliariae and towards various allelochemicals. These were: a pyrrolizidine alkaloid (PA) extract of Adenostyles leaves; senecionine (a PA present ...

journal_title：Oecologia

authors： Speiser B,Harmatha J,Rowell-Rahier M

更新日期：1992-11-01 00:00:00

abstract：:Plant stigmas and bee pollinators are competitors for pollen. Pollen placed on a pollinator's body can be picked up by conspecific stigmas or it can be collected by the pollinator as food. Hypothetically, one solution is for pollen to be placed on 'safe sites' on the pollinator's body, sites where the pollinator canno...

journal_title：Oecologia

authors： Tong ZY,Huang SQ

更新日期：2018-01-01 00:00:00

abstract：:Environmental filtering and niche differentiation are processes proposed to drive community assembly, generating nonrandom patterns in community trait distributions. Despite the substantial intraspecific trait variation present in plant communities, most previous studies of trait-based community assembly have used spe...

journal_title：Oecologia

authors： Siefert A

更新日期：2012-11-01 00:00:00

abstract：:In annual pastures utilized for grazing, the amount and quality of the standing dry matter in the dry season is of importance for the performance of the animals. Often both characteristics decline at the end of the green season. It is shown, that dispersal of the reproductive structures of the vegetation may be the ma...

journal_title：Oecologia

authors： de Ridder N,Seligman NG,van Keulen H

更新日期：1981-05-01 00:00:00

abstract：:Caterpillars of Maculinea arion are obligate predators of the brood of Myrmica sabuleti ants. In the aboratory, caterpillars eat the largest available ant larvae, although eggs, small larvae and prepupae are also palatable. This is an efficient way to predate. It ensures that newly-adopted caterpillars consume the fin...

journal_title：Oecologia

authors： Thomas JA,Wardlaw JC

更新日期：1992-08-01 00:00:00

abstract：:Studies that test community assembly hypotheses in observational communities frequently evaluate patterns for plots or entire communities, yet studies that examine assembly patterns across spatial scales show that they are greatly influenced by scale. Here, we test the spatial dependency of patterns of relatedness and...

journal_title：Oecologia

authors： Jin LS,Yin D,Fortin MJ,Cadotte MW

更新日期：2020-07-01 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：:Host plant use and availability were determined in early nymphal and adult-stage Schistocerca emarginata (=lineata) (Orthoptera: Acrididae) populations at six localities in Texas, USA. Early instar nymphal populations were feeding almost exclusively on either Ptelea trifoliata (Rutaceae) or Rubus trivialis (Rosaceae)....

journal_title：Oecologia

authors： Sword GA,Dopman EB

更新日期：1999-08-01 00:00:00

abstract：:The influence of short- and long-term (cohort) effects of climate and density on the life-histories of ungulates in temperate regions may vary with latitude, habitat, and management practices, but the life-histories of ungulates in the Mediterranean region are less well known. This study examined the short- and long-t...

journal_title：Oecologia

authors： Rodriguez-Hidalgo P,Gortazar C,Tortosa FS,Rodriguez-Vigal C,Fierro Y,Vicente J

更新日期：2010-10-01 00:00:00

abstract：:The population dynamics of snowshoe hares (Lepus americanus) are fundamental to the ecosystem dynamics of Canada's boreal forest. During the 8- to 11-year population cycle, hare densities can fluctuate up to 40-fold. Predators in this system (lynx, coyotes, great-horned owls) affect population numbers not only through...

journal_title：Oecologia

authors： Lavergne SG,McGowan PO,Krebs CJ,Boonstra R

更新日期：2014-11-01 00:00:00