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. Our results show that oviposition first occurred on the largest patches with the highest number of plants. However, there was no significant effect of patch size or number of plants per patch at the end of the experiment. At this time the level of attack per plant was negatively correlated with plant density. This negative effect of density on the level of oviposition was not mediated by a reduction in plant size at higher densities. The pattern observed may indicate a risk-spreading strategy by females.
journal_name
Oecologiajournal_title
Oecologiaauthors
Shea K,Smyth M,Sheppard A,Morton R,Chalimbaud Jdoi
10.1007/s004420000425subject
Has Abstractpub_date
2000-09-01 00:00:00pages
615-621issue
4eissn
0029-8549issn
1432-1939pii
10.1007/s004420000425journal_volume
124pub_type
杂志文章相关文献
OECOLOGIA文献大全abstract::Growth and respiration were measured in a species of Anonchus (Nematoda: Plectidae) at 5°C, 10°C, 15°C, 20°C and 25°C. At 5°C no growth was measurable but the organisms remained active. Maximum production occurred at 15°C, but the highest rate of growth occurred at 20°C. Thus, adult size attained is dependent on the t...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00377437
更新日期:1979-08-01 00:00:00
abstract::In this paper we test three plant species for the inducibility of their alkaloid production. The plants were heavily damaged by cutting off 50% of their leaf surface using a pair of scissors. The cut-off leaf tips were used as controls for possible diurnal fluctuations. After 3, 6, 12, 24 and 48 h, respectively, the l...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00320998
更新日期:1993-09-01 00:00:00
abstract::Much of the research into herbivore ecology and evolution has focused on patterns and mechanisms of niche partitioning in the diets of specialized grazers and browsers, but the significance of the balance of grazing and browsing within intermediate feeders present unique questions that have received less attention. We...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-008-1200-1
更新日期:2009-01-01 00:00:00
abstract::The spatial context in which seed predation occurs may modify the spatial structure of recruitment generated by seed dispersal. The Janzen-Connell (J-C) model predicts that granivores will exert greater pressure on the parent plant or at those sites where the density of dispersed seeds is higher. We have investigated ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-010-1590-8
更新日期:2010-06-01 00:00:00
abstract::A stage-by-stage protocol for identifying simple or biased lottery, or non-lottery, patterns of seedling recruitment is outlined. For a simple (weighted) lottery to apply, the proportion of total individuals accounted for by one species at one stage of recruitment plotted against the proportion accounted for at a prev...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00328815
更新日期:1995-03-01 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
pub_type: 杂志文章
doi:10.1007/BF00317373
更新日期:1992-11-01 00:00:00
abstract::The phenomenon of overyielding in species-diverse plant communities is mainly attributed to complementary resource use. Vertical niche differentiation belowground might be one potential mechanism for such complementarity. However, most studies that have analysed the diversity/productivity relationship and belowground ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2259-2
更新日期:2012-08-01 00:00:00
abstract::1. The uptake of heavy metals via the alimentary tract can be an important factor for the metal budget of fish. 2. Concepts such as biomagnification, bioaccumulation, biotransference, or concentration factors, convey little information about the real threat originating from heavy metals in an aquatic food chain. 3. In...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00376982
更新日期:1987-08-01 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
pub_type: 杂志文章
doi:10.1007/BF00317182
更新日期:1992-05-01 00:00:00
abstract::Hybridization has been proposed as a mechanism by which exotic plants can increase their invasiveness. By generating novel recombinants, hybridization may result in phenotypes that are better adapted to the new environment than their parental species. We experimentally assessed the resistance of five exotic Fallopia t...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-011-2035-8
更新日期:2011-12-01 00:00:00
abstract::The effects of simulated goose grazing on Phleum pratense plants were tested in an Iceland hayfield during the spring goose staging period (19 April-11 May 1997). Plants in an area exclosed from the influence of grazing and the nutrient effects of goose faeces were subject to the removal of the youngest lamina once, t...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050574
更新日期:1998-08-01 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
pub_type: 杂志文章
doi:10.1007/BF00541116
更新日期:1982-01-01 00:00:00
abstract::We examined the relative ability of multiple factors to explain variation in two interrelated life-history traits, interclutch interval and annual reproductive success, in feral pigeons. Seasonal influences, brood size, and female body mass and tarsus length explained significant amounts of variation in interclutch in...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00789936
更新日期:1989-03-01 00:00:00
abstract::Fluorescent probes have been applied to study by epifluorescence microscopy interactions between species in an Anabaena flos-aquae association, derived from a freshwater community. Glycoconjugates (macromolecules containing carbohydrate residues) have been shown to play a vital role in recognition processes and in for...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00399219
更新日期:1983-05-01 00:00:00
abstract::Factors influencing the consumption of algae and the rate of feeding by the larvae of Heterotrissocladius changi Saether and Polypedilum nebeculosum (Meigen) (Chironomidae: Diptera) were determined from collections made between July 1975 and May 1977 in Yellowknife Bay, situated in the Canadian subarctic. Although bot...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00347939
更新日期:1979-01-01 00:00:00
abstract::The responses to drought of the solar tracking winter annualLupinus arizonicus (Wats.) were examined under field and laboratory growth regimes. Under drought conditions tracking movements were maintained until the plant reached the wilting point. The leaves and leaflets were observed to cup in response to decreases in...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00572673
更新日期:1980-01-01 00:00:00
abstract::Stable isotope analyses are often used to calculate relative contributions of multiple food sources in an animal's diet. One prerequisite for a precise calculation is the determination of the diet-tissue fractionation factor. Isotopic ratios in animals are not only affected by the composition of the diet, but also by ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-003-1429-7
更新日期:2004-01-01 00:00:00
abstract::Atriplex sagittata is a heterocarpic species producing three types of fruits which differ in morphology and ecological properties. This study focused on variation in biomass allocation into particular fruit types under different density and fertilization levels. The reduction in total weight under stressful conditions...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050761
更新日期:1999-04-01 00:00:00
abstract::Climate change is disrupting species interactions by altering the timing of phenological events such as budburst for plants and hatching for insects. We combined field observations with laboratory manipulations to investigate the consequences of climate warming on the phenology and performance of the eastern tent cate...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-015-3371-x
更新日期:2015-11-01 00:00:00
abstract:: Quantifying pathways of energy transfer between plants, pests, and beneficial insects is a necessary step toward maintaining pest stable agroecosystems in the absence of chemical subsidies. A diet switching experiment utilizing a predatory ladybird beetle, Hippodamia variegata (Goeze), evaluated the use of naturally ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050064
更新日期:1996-12-01 00:00:00
abstract::The effects of density on growth and development of Scaphiopus couchi tadpoles in desert ponds were investigated, and sources of mortality over a three-year period were documented. In 16 of the 82 ponds monitored, predation was the principal cause of death, demonstrating that tadpoles in desert ponds may be exposed to...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00377299
更新日期:1987-01-01 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
pub_type: 杂志文章
doi:10.1007/s00442-011-1910-7
更新日期:2011-07-01 00:00:00
abstract::Release from natural enemies is often cited as a key factor for understanding the success of invasive plant species in novel environments. However, with time invasive species will accumulate native enemies in their invaded range, with factors such as spread distance from the site of introduction, climate and leaf-leve...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-017-4008-z
更新日期:2018-02-01 00:00:00
abstract::The tropical ants Ectatomma ruidum and E. tuberculatum (Formicidae) regularly patrol leaves, flowers, and fruits of the understory shrub, Psychotria limonensis (Rubiaceae), on Barro Colorado Island, Panama. Ant and pollinator exclusion experiments elucidated both positive and negative effects of ant attendance on plan...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050825
更新日期:1999-06-01 00:00:00
abstract::Common ragweed (Ambrosia artemisiifolia) is an abundant weed in its native North America, despite supporting a wide range of natural enemies. Here, we tested whether these enemies have significant impacts on the performance of this plant in its native range. We excluded enemies from the three principal life-history st...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-009-1557-9
更新日期:2010-04-01 00:00:00
abstract::When two ecosystem engineers share the same natural environment, the outcome of their interaction will be unclear if they have contrasting habitat-modifying effects (e.g., sediment stabilization vs. sediment destabilization). The outcome of the interaction may depend on local environmental conditions such as season or...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-2916-8
更新日期:2014-06-01 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
pub_type: 杂志文章
doi:10.1007/s00442-014-3053-0
更新日期:2014-11-01 00:00:00
abstract::Geographic variation in species interactions can have major effects on species distributions and can be important for the resistance of resident communities to invasive species. We tested the hypothesis that coexistence or replacement of a resident North American mosquito Aedes aegypti with the invasive Aedes albopict...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-010-1624-2
更新日期:2010-09-01 00:00:00
abstract::There are three major components to plant structure relevant to searching parasitoids: 1) plant size or surface area, 2) the variation among plant parts (structural heterogeneity), such as seed heads, flowers and nectaries, and heterogeneous surfaces (e.g. glabrous, hirsute), and 3) the connectivity of parts or plant ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00323530
更新日期:1990-02-01 00:00:00
abstract::Evidence was given that the freezing tolerance of Halimione portulacoides, a wintergreen halophyte, can be explained by protection of sensitive cellular membranes in vivo. Experiments were done with cloned cuttings of a plant from the German North Sea coast. One series received no NaCl (O-plants) the other 3% NaCl (Na...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00345190
更新日期:1979-01-01 00:00:00