Abstract:
:Two annual species of Bromus, an invader (B. hordeaceus, ex B. mollis) and a non-invader (B. intermedius), were grown for 28 days in growth chambers, at 5 and 100 μM NO 3- in flowing nutrient solution. No differences between the two species were observed at either NO 3- level, in terms of relative growth rate (RGR) or its components, dry matter partitioning, specific NO 3- absorption rate, nitrogen concentration, and other characteristics of NO 3- uptake and photosynthesis. The effects of decreasing NO 3- concentration in the solution were mainly to decrease the NO 3- concentration in the plants through decreased absorption rate, and to decrease the leaf area ratio through increased specific leaf mass and decreased leaf mass ratio. Organic nitrogen concentration varied little between the two treatments, which may be the reason why photosynthetic rates were not altered. Consequently, RGR was only slightly decreased in the 5-μM treatment compared to the 100-μM treatment. This is in contrast with other species, where growth is reduced at much higher NO 3- concentrations. These discrepancies may be related to differences in RGR, since a log-linear relationship was found between RGR and the NO 3- concentration at which growth is first reduced. In addition, a strong linear relationship was found between the RGR of these species and their maximum absorption rate for nitrate, suggesting that the growth of species with low maximum RGR may be partly regulated by nutrient uptake.
journal_name
Oecologiajournal_title
Oecologiaauthors
Garnier E,Koch GW,Roy J,Mooney HAdoi
10.1007/BF00378673subject
Has Abstractpub_date
1989-06-01 00:00:00pages
542-550issue
4eissn
0029-8549issn
1432-1939pii
10.1007/BF00378673journal_volume
79pub_type
杂志文章相关文献
OECOLOGIA文献大全abstract::Leaf turnover and aboveground productivity in relation to nutrient availability were studied in the evergreen shrubs Erica tetralix and Calluna vulgaris. In monospecific stands of these species four levels of nutrient (NPK) availability were created during three growing seasons. Percentage survival and life expectancy...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00377206
更新日期:1989-01-01 00:00:00
abstract::A technique is presented in which desiccation as a source of error in fresh weight determinations of soft-bodied microfauna is avoided by weighing the animal in a drop of silica fluid. ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00345143
更新日期:1978-01-01 00:00:00
abstract::Increased nitrogen (N) deposition, resulting from the combustion of fossil fuels, production of synthetic fertilizers, growth of N(2)-fixing crops and high-intensity agriculture, is one of the anthropogenic factors most likely to cause global biodiversity changes over the next century. This influence may be especially...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-010-1818-7
更新日期:2011-01-01 00:00:00
abstract::Some plant secondary compounds, such as terpenes, are very flammable; however, their role in enhancing plant flammability is poorly understood and often neglected in reviews on plant chemical ecology. This is relevant as there is growing evidence that flammability-enhancing traits are adaptive in fire-prone ecosystems...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-015-3454-8
更新日期:2016-01-01 00:00:00
abstract::It has long been argued that seed dispersal enhances recruitment in tropical trees by allowing offspring to `escape' strong density/distance-dependent attack by insects, pathogens and rodents. Here we examined the effects of canopy openness and parent-offspring distance upon the frequency and timing of Chlorocardium r...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050778
更新日期:1999-05-01 00:00:00
abstract::We investigated seasonality of gender differences in the patterns of flea infestation in nine rodent species to test if sex-biased parasitism in terms of mean abundance, species richness, prevalence and the level of aggregation (a) varies among hosts and between seasons, and (b) is linked to sexual size dimorphism. Se...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-005-0189-y
更新日期:2005-12-01 00:00:00
abstract::Many bumblebee species are declining at a rapid rate in the United Kingdom and elsewhere. This is commonly attributed to the decline in floral resources that has resulted from an intensification in farming practices. Here we assess growth of nests of the bumblebee, Bombus terrestris, in habitats providing different le...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420100803
更新日期:2002-01-01 00:00:00
abstract::Invasion of non-native annuals across the Intermountain West is causing a widespread transition from perennial sagebrush communities to fire-prone annual herbaceous communities and grasslands. To determine how this invasion affects ecosystem function, carbon and water fluxes were quantified in three, paired sagebrush ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-005-0231-0
更新日期:2006-01-01 00:00:00
abstract::Understanding climatic controls on tropical forest productivity is key to developing more reliable models for predicting how tropical biomes may respond to climate change. Currently there is no consensus on which factors control seasonal changes in tropical forest tree growth. This study reports the first comprehensiv...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-013-2766-9
更新日期:2014-01-01 00:00:00
abstract::Warming effects on shoot growth, production, reproductive activity, and vegetation structure of alpine shrubs were measured over 5 years in a mid-latitude alpine fellfield in northern Japan. Open-top chambers (OTC) increased the daily mean air-temperature by 1.5-2.3 degrees C throughout the growing season but the effe...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-003-1179-6
更新日期:2003-04-01 00:00:00
abstract::No-take marine reserves (NTMRs) provide hope that local carrying capacity may be partially restored if reserves are protected long enough. How long is long enough? We assess the duration of protection required for populations of large predatory reef fish in marine reserves to attain new steady states. We monitored bio...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-010-1692-3
更新日期:2010-08-01 00:00:00
abstract::As primary producers, plants are known to influence higher trophic interactions by initiating food chains. However, as architects, plants may bypass consumers to directly affect predators with important but underappreciated trophic ramifications. Invasion of western North American grasslands by the perennial forb, spo...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-008-1241-5
更新日期:2009-03-01 00:00:00
abstract::In the "Solling-Projekt" (IBP) of the "Deutsche Forschungsgemeinschaft" the decomposition of different qualities of leaves in acid soil (Solling) and in lime soil (Göttinger Wald) was studied under various conditions (October 1973-October 1974).Plastic rings were used as litter bags in the following way: on the bottom...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00345418
更新日期:1977-06-01 00:00:00
abstract::Biotic assemblages of insular habitats are nested when poor assemblages are subsets of richer ones. Nestedness of species assemblages is frequent and may result from selective extinction or frequent colonization in insular habitats. It may also be created by a nested distribution of habitats among islands or by sampli...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050737
更新日期:1999-03-01 00:00:00
abstract::I attempted to characterize spatial units of local dynamics and dispersal in banner-tailed kangaroo rats (Dipodomys spectabilis), to determine if spatial structure influenced population dynamics in the way predicted by current metapopulation models. D. spectabilis exhibited a hierarchical spatial structure. "Local pop...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317143
更新日期:1994-11-01 00:00:00
abstract::Parents are predicted to trade offspring number and quality against the costs of reproduction. In altricial birds, parasites can mediate these costs because intensity of parasitism may increase with parental effort. In addition, parasites may mediate a trade-off between offspring number and quality because nestlings i...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-002-1015-4
更新日期:2002-10-01 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
pub_type: 杂志文章
doi:10.1007/BF00317172
更新日期:1992-05-01 00:00:00
abstract::Urbanization is a major challenge for biodiversity conservation, yet the evolutionary processes taking place in urbanized areas remain poorly known. Human activities in cities set new selective forces in motion which need to be investigated to predict the evolutionary responses of animal species living in urban areas....
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-013-2663-2
更新日期:2013-11-01 00:00:00
abstract::The paper considers a model of competition, based upon the Lotka-Volterra equations, which explicitly considers the effect of density independent mortality upon the outcome of competition. The model's possible application to wild Drosophila species in Europe are considered. ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00345527
更新日期:1975-12-01 00:00:00
abstract::The logistic equation has been used as the basis of two distinct models of population dynamics, a resource limited model and an equilibrium model. It is argued that although the two models are very different, the distinction between them has been obscured by the use of the same terminology for the parameters of both. ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00347602
更新日期:1981-07-01 00:00:00
abstract::Fruiting phenology and pattern of fruit removal of two shrubby dogwoods were examined in relation to fruit composition. It was predicted that fruit of the species bearing high fat fruit would disappear more rapidly and fall to the ground sooner than fruit of the species bearing low fat fruit. Field observation at two ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00384952
更新日期:1985-10-01 00:00:00
abstract::Developmental periods are integral components of life history strategies that can have important fitness consequences and vary enormously among organisms. However, the selection pressures and mechanisms causing variation in length of developmental periods are poorly understood. Particularly puzzling are prolonged deve...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-005-0220-3
更新日期:2006-01-01 00:00:00
abstract::Pea aphids have several alternative responses to the detection of alarm pheromone produced by conspecifics. One of these, dropping from the feeding site to the ground, is potentially costly owing to the risk of desiccation-induced mortality on the ground before another host plant can be reached. Both dropping and walk...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317197
更新日期:1990-07-01 00:00:00
abstract::The life ofOncopeltus fasciatus centers on the seeds of milkweeds (Asclepiadaceae,Asclepias syriaca in this study). Adults reproduce prolifically on these seeds, but they engage in only half as much copulation and lay only a few eggs when fed milkweed buds and flowers instead. They can not maintain body weight on a di...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00582894
更新日期:1976-06-01 00:00:00
abstract::Larvae of the pyralid moth, Herpetogramma aeglealis, construct feeding shelters upon the Christmas fern (Polystichum acrostichoides). Field and laboratory study involving 532 shelters showed that as the larvae mature, they sequentially inhabit approximately 5 shelters of 3 distinct types, constructed at night on diffe...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00378603
更新日期:1988-03-01 00:00:00
abstract::It is often suggested that habitat attributes and interspecific interactions can cause non-random species co-occurrence patterns, but quantifying their contributions can be difficult. Null models that systematically exclude and include habitat effects can give information on the contribution of these factors to commun...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-011-2180-0
更新日期:2012-04-01 00:00:00
abstract::Competition for space is an important process on tropical coral reefs. Few studies have examined the role sponges play in community structure despite the fact that many sponges are competitively superior to reef-building corals in space acquisition. Surveys conducted throughout the Florida Keys indicated that Chondril...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050642
更新日期:1998-11-01 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
pub_type: 杂志文章
doi:10.1007/s004420000425
更新日期:2000-09-01 00:00:00
abstract::Leaf-chewing herbivores select food with a protein/carbohydrate ratio of 0.8-1.5, whereas phloem sap, which aphids feed on, has a ratio of approximately 0.1. Enhanced N fertilization increases the amino acid concentration in phloem sap and elevates the N/C ratio. The study examines: (1) whether aphids select between p...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-010-1652-y
更新日期:2010-08-01 00:00:00
abstract::A simulation program on the germination of winter annuals is written in such a way that the influence of changing environmental conditions on germination characteristics such as the time of germination, the percentage of germination and the distribution function of germination is described as well as possible in accor...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF01039793
更新日期:1974-09-01 00:00:00