Sexually differentiated flight responses of the Mexican bean beetle to larval and adult nutrition.

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：:Although insect herbivores have many well documented effects on plant performance, there are few studies that assess the impact of above-ground herbivory on below-ground plant growth. For a seven year period in which no large-scale herbivore outbreaks occurred, a broad spectrum insecticide was utilized to suppress her...

journal_title：Oecologia

authors： Cain ML,Carson WP,Root RB

更新日期：1991-10-01 00:00:00

abstract：:The presence of litter has the potential to alter the population dynamics of plants. In this paper, we explore the effects of litter on population dynamics using a simple experimental laboratory system with populations of the annual crucifer, Cardamine pensylvanica. Using a factorial experiment with four densities and...

journal_title：Oecologia

authors： Molofsky J,Lanza J,Crone EE

更新日期：2000-09-01 00:00:00

abstract：:Two physiological races of the carabid beetle, Pterostichus nigrita, are compared. The larvae from the northern Scandinavian population (polar circle) develop faster in all temperature regimens, have a reduced mortality in lower temperatures and an increased growth rate in high temperatures compared with the central E...

journal_title：Oecologia

authors： Ferenz HJ

更新日期：1975-03-01 00:00:00

abstract：:Dry lichen thalli were enclosed in gas exchange chambers and treated with an air stream of high relative humidity (96.5 to near 100%) until water potential equilibrium was reached with the surrounding air (i.e., no further increase of weight through water vapor uptake). They were then sprayed with liquid water. The tr...

journal_title：Oecologia

authors： Lange OL,Kilian E,Ziegler H

更新日期：1986-12-01 00:00:00

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：:We tested whether interspecific competition from Aedes albopictus had measurable effects on A. aegypti at the typical numbers of larval mosquitoes found in cemetery vases in south Florida. We also tested whether the effect of interspecific competition from A. albopictus on A. aegypti differed between sites where A. ae...

journal_title：Oecologia

authors： Juliano SA,Lounibos LP,O'Meara GF

更新日期：2004-05-01 00:00:00

abstract：:A factorial design of clipping and compaction was used to study the responses of Schizachyrium scoparium and its mycorrhizal symbionts to these stresses. All treatment combinations significantly reduced the growth and biomass of plants relative to controls. Compaction significantly reduced tillering and crown expansio...

journal_title：Oecologia

authors： Wallace LL

更新日期：1987-06-01 00:00:00

abstract：:Three-to-five-year population oscillations of northern small rodents are usually synchronous over hundreds of square kilometers. This regional synchrony could be due to similarity in climatic factors, or due to nomadic predators reducing the patches of high prey density close to the average density of a larger area. W...

journal_title：Oecologia

authors： Norrdahl K,Korpimäki E

更新日期：1996-09-01 00:00:00

abstract：:The population ecology of Pardia tripunctana and Notocelia roborana, a bud- and a leaf-feeding tortricid respectively, on Rosa spp. was studied.Mortality factors of the egg and larval stages are low and density-independent.Pupal mortality in the soil is a regulatory mechanism: it compensates for density fluctuations, ...

journal_title：Oecologia

authors： Bauer G

更新日期：1985-02-01 00:00:00

abstract：:Increasing evidence has shown that nutrients and consumers interact to control primary productivity in natural systems, but how abiotic stress affects this interaction is unclear. Moreover, while herbivores can strongly impact zonation patterns in a variety of systems, there are few examples of this in salt marshes. W...

journal_title：Oecologia

authors： Alberti J,Méndez Casariego A,Daleo P,Fanjul E,Silliman BR,Bertness M,Iribarne O

更新日期：2010-05-01 00:00:00

abstract：:There is growing recognition that changes in vegetation composition can strongly influence peatland carbon cycling, with potential feedbacks to future climate. Nevertheless, despite accelerated climate and vegetation change in this ecosystem, the growth responses of peatland plant species to combined warming and veget...

journal_title：Oecologia

authors： Walker TN,Ward SE,Ostle NJ,Bardgett RD

更新日期：2015-05-01 00:00:00

abstract：:Studies of population dynamics of long-lived species have generally focused on adult survival because population growth should be most sensitive to this parameter. However, actual variations in population size can often be driven by other demographic parameters, such as juvenile survival, when they show high temporal ...

journal_title：Oecologia

authors： Souchay G,Gauthier G,Pradel R

更新日期：2013-09-01 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：: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：:The family of orchids involves a number of critically endangered species. Understanding of drivers of their landscape distribution could provide a valuable insight into their decline. Our objectives were to develop models predicting distribution of selected orchid species-four co-occurring forest orchid species, Cepha...

journal_title：Oecologia

authors： Hemrová L,Kotilínek M,Konečná M,Paulič R,Jersáková J,Těšitelová T,Knappová J,Münzbergová Z

更新日期：2019-06-01 00:00:00

abstract：:Species of the 'bana' vegetation in the Amazonas region of equatorial South America have scleromorphic leaves. This leaf type, which characterizes the vegetation of Mediterranean climates, among others, has apparently evolved in this community in response to the oligotrophic soils and widely fluctuating water table.An...

journal_title：Oecologia

authors： Sobrado MA,Medina E

更新日期：1980-01-01 00:00:00

abstract：:Fourteen genotypes (varieties) of soybean (Glycine max) were screened for levels of induced resistance to Mexican bean beetle (Epilachna varivestis) damage, and a subset of 6 of those varieties was screened for levels of constitutive resistance to Mexican bean beetles. Experiments were carried out in the greenhouse, w...

journal_title：Oecologia

authors： Underwood N,Morris W,Gross K,Lockwood Iii JR

更新日期：2000-01-01 00:00:00

abstract：:It is shown that litter of flowering plants of Cirsium vulgare inhibits the growth of seedlings of the same species at concentrations as low as 0.4% (g litter/g soil). The inhibition of growth cannot be fully compensated by adding nutrients, which indicates that autotoxicity may occur. It must be concluded, however, f...

journal_title：Oecologia

authors： de Jong TJ,Klinkhamer PG

更新日期：1985-01-01 00:00:00

abstract：:Linking spatial variation in environmental factors to variation in demographic rates is essential for a mechanistic understanding of the dynamics of populations. However, we still know relatively little about such links, partly because feedbacks via intraspecific density make them difficult to observe in natural popul...

journal_title：Oecologia

authors： Dahlgren JP,Ostergård H,Ehrlén J

更新日期：2014-12-01 00:00:00

abstract：:Semi-arid ecosystems are strongly water-limited and typically quite responsive to changes in precipitation amount and event size. In the C4-dominated shortgrass steppe of the Central US, previous experiments suggest that large rain events more effectively stimulate plant growth and aboveground net primary production (...

journal_title：Oecologia

authors： Post AK,Knapp AK

更新日期：2019-11-01 00:00:00

abstract：:Abiotic drivers of environmental stress have been found to induce CAM expression (nocturnal carboxylation) in facultative CAM species such as Mesembryanthemum crystallinum. The role played by biotic factors such as competition with non-CAM species in affecting CAM expression, however, remains largely understudied. Thi...

journal_title：Oecologia

authors： Yu K,D'Odorico P,Li W,He Y

更新日期：2017-06-01 00:00:00

abstract：:Photosynthetic induction under constant and fluctuating light conditions was investigated in intact leaves of Alocasia macrorrhiza and Toona australis, two species native to Australian rainforests. When leaves were exposed to saturating light following a long period at low light intensity, an induction period of 25-40...

journal_title：Oecologia

authors： Chazdon RL,Pearcy RW

更新日期：1986-07-01 00:00:00

abstract：:The leaves of Cymopterus longipes form prostrate rosettes early in the spring. As the weather warms, these leaves are elevated on a pseudoscape (false stem) which develops below the rosette through the elongation of the caudex (in the region between root and shoot). The effect of this growth form change on the water r...

journal_title：Oecologia

authors： Werk KS,Ehleringer J,Harley PC

更新日期：1986-06-01 00:00:00

abstract：:This study examines the impacts of woody, N2-fixing invasive Acacia spp. on the patterns of nutrient cycling in two invaded ecosystems of differing nutrient status in the Cape floristic region. Patterns of soil nutrient mineralization were measured by a field incubation method while the significance of the fixation pr...

journal_title：Oecologia

authors： Stock WD,Wienand KT,Baker AC

更新日期：1995-03-01 00:00:00

abstract：:Perennial species have evolved several strategies to survive fire, with resprouters and seeders forming two major categories. Gompholobium marginatum is a herbaceous seeder legume occurring in the Western Australian jarrah (Eucalyptus marginata) forest which since 1961 has been subjected to burns every sixth year. Suc...

journal_title：Oecologia

authors： Hansen A,Pate JS,Hansen AP

更新日期：1992-05-01 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

abstract：:The theory that early successional plants and annual plants will be less well defended against generalist herbivores than later successional plants and perennial plants, because they avoid herbivores by escaping in space and time, is evaluated. The theory is not supported in the ecosystem examined. The correlation bet...

journal_title：Oecologia

authors： Otte D

更新日期：1975-06-01 00:00:00

abstract：:Only heavy insects and those that fly quickly can pass through a spider's web. When an insect is entangled in a web, permanent activity is the best way of getting free. Small wings are conducive to a successful escape, as is a special surface structure of the wings (scales, hairs, lipoid surface). The autotomy of legs...

journal_title：Oecologia

authors： Nentwig W

更新日期：1982-06-01 00:00:00

abstract：:Plant-plant facilitation is a crucial ecological process, as many plant species (facilitated) require the presence of an established individual (nurse) to recruit. Some plant facilitative interactions disappear during the ontogenetic development of the facilitated plant but others persist, even when the two plants are...

journal_title：Oecologia

authors： Montesinos-Navarro A,Segarra-Moragues JG,Valiente-Banuet A,Verdú M

更新日期：2016-06-01 00:00:00