Abstract:
:Alpine Trifolium species have high rates of symbiotic N2-fixation which may influence the abundance and growth of plant species growing near them. The potential for facilitative effects on plant abundance and growth in dry meadow alpine tundra of Niwot Ridge, Colo., characterized by low resource availability, was investigated by measuring soil N, aboveground biomass production, and plant species composition in patches of Trifolium dasyphyllum and surrounding tundra. Extractable inorganic N was more than twofold greater and extractable P was 27% lower in Trifolium patches than in surrounding tundra. Aboveground production was twofold greater in Trifolium patches than in surrounding tundra. However, the difference was largely due to the production of T. dasyphyllum relative to the non-Trifolium component of biomass, which was not different between the Trifolium patches and surrounding tundra. In the Trifolium patches, the proportion of graminoid biomass was lower while the proportion of forb biomass was higher relative to surrounding tundra. Although the abundance of some species was positively associated with the presence of Trifolium, other species were less abundant, possibly due to increased competition for P and differential abilities of alpine species to respond to increased N availability. Trifolium may exert both facilitative and inhibitive effects on dry meadow alpine species and, in the process, substantially influence the spatial heterogeneity in community structure and primary production.
journal_name
Oecologiajournal_title
Oecologiaauthors
Thomas BD,Bowman WDdoi
10.1007/s004420050487subject
Has Abstractpub_date
1998-06-01 00:00:00pages
26-31issue
1-2eissn
0029-8549issn
1432-1939pii
10.1007/s004420050487journal_volume
115pub_type
杂志文章相关文献
OECOLOGIA文献大全abstract::Global climate change is expected to affect terrestrial ecosystems in a variety of ways. Some of the more well-studied effects include the biogeochemical feedbacks to the climate system that can either increase or decrease the atmospheric load of greenhouse gases such as carbon dioxide and nitrous oxide. Less well-stu...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-011-2133-7
更新日期:2012-03-01 00:00:00
abstract::Plant species and functionally related species groups from arid and semi-arid habitats vary in their capacity to take up summer precipitation, acquire nitrogen quickly after summer precipitation, and subsequently respond with ecophysiological changes (e.g. water and nitrogen relations, gas exchange). For species that ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-003-1403-4
更新日期:2004-10-01 00:00:00
abstract::Plant species composition is changing across many landscapes, but it is unclear how these changes affect habitat quality for animals. We used functional diversity and community-weighted mean (CWM) trait values for four plant traits (litter N, P, lignin and soluble phenolics) to explore how changes in plant species com...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-013-2856-8
更新日期:2014-04-01 00:00:00
abstract::Although ecological disturbances can have a strong influence on pollinators through changes in habitat, virtually no studies have quantified how characteristics of wildfire influence the demography of essential pollinators. Nevertheless, evaluating this topic is critical for understanding how wildfire is linked to pol...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-020-04809-3
更新日期:2021-01-03 00:00:00
abstract::The goal of this study was to evaluate the contribution of oak trees (Quercus spp.) and their associated mycorrhizal fungi to total community soil respiration in a deciduous forest (Black Rock Forest) and to explore the partitioning of autotrophic and heterotrophic respiration. Trees on twelve 75 × 75-m plots were gir...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-011-2182-y
更新日期:2012-05-01 00:00:00
abstract::A widely cited benefit of predator diversity is greater suppression of insect herbivores, with corresponding increases in plant biomass. In the context of a vector-borne pathogen system, predator species richness may also influence plant disease risk via the direct effects of predators on the abundance and behavior of...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-3194-1
更新日期:2015-04-01 00:00:00
abstract::Eggs of the elm leaf beetle Xanthogaleruca luteola are often heavily attacked by the chalcidoid wasp Oomyzus gallerucae. We studied the chemical signals mediating interactions between the egg parasitoid, its host, and the plant Ulmus campestris. Olfactometer bioassays with O. gallerucae showed that volatiles of the ho...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050287
更新日期:1997-09-01 00:00:00
abstract::Competitive displacement is considered the most severe consequence of interspecific competition; if a superior competitor invades the habitat of an inferior species, the inferior species will be displaced. Most displacements previously reported among arthropods were caused by exotic species. The lack of investigation ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-006-0560-7
更新日期:2006-12-01 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
pub_type: 杂志文章
doi:10.1007/s00442-019-04515-9
更新日期:2019-11-01 00:00:00
abstract::Adults of the leaf beetle Plagiodera versicolora Laich, avoided previously injured shoots of Salix alba 'Tristis' in favor of nearby uninjured ones. The response was rapid and persisted for five days of study. During brief periods of observation, the vast majority of beetles engaged in behaviors other than locomotion ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00380144
更新日期:1989-08-01 00:00:00
abstract::Experiments are described which test the hypothesis that more host-specific species of caterpillars should be less aceptable to a generalist predator than polyphagous species. Caterpillars of all species were tested in paired choice tests with the Argentine ant, Iridomyrmex humilis. Experiments were replicated ten tim...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00384324
更新日期:1989-05-01 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
pub_type: 杂志文章
doi:10.1007/s00442-004-1532-4
更新日期:2004-05-01 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
pub_type: 杂志文章
doi:10.1007/s004420050829
更新日期:1999-07-01 00:00:00
abstract::Ten populations of the perennial herb, Liatris acidota Engelm. & Gray (Compositae), growing on the Texas Gulf Coast (USA) were analyzed for age structure, frequency of predation, and frequency of asexual reproduction. Nine of the ten populations exhibited non-stable age distributions due to a deficiency of young non-s...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00344693
更新日期:1978-01-01 00:00:00
abstract::The purpose of this research was to investigate the influence of nitrogen availability on growth and the patterns of dry matter and nitrogen allocation of the dune grasses Ammophila arenaria and Elymus mollis. Plants were grown from rhizome segments under near-ambient coastal conditions and received either high or low...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00379585
更新日期:1983-03-01 00:00:00
abstract::Pathogens can drive host population dynamics. Chytridiomycosis is a fungal disease of amphibians that is caused by the fungus Batrachochytrium dendrobatidis (Bd). This pathogen has caused declines and extinctions in some host species whereas other host species coexist with Bd without suffering declines. In the early 1...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-015-3422-3
更新日期:2015-12-01 00:00:00
abstract::Agricultural intensification (AI) is currently a major driver of biodiversity loss and related ecosystem functioning decline. However, spatio-temporal changes in community structure induced by AI, and their relation to ecosystem functioning, remain largely unexplored. Here, we analysed 16 quantitative cereal aphid-par...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2366-0
更新日期:2012-12-01 00:00:00
abstract::Net photosynthetic rates for the lichen Parmelia praesignis Nyl. were obtained as a function of 5 light levels, 5 temperature levels, and of water content as thalli dried from saturated conditions. Data are described as second order polynomials in the light, and as saturation curves in the dark. Rates in the light wer...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00376872
更新日期:1984-10-01 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::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 identification of potential competitors has been driven by the concept of limiting similarity. Lacking are explicit tests of interaction strength among morphologically similar and dissimilar species. I used the mottled sculpin, Cottus bairdi, as a focal species in an artificial stream experiment designed to compar...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00365559
更新日期:1995-09-01 00:00:00
abstract::The comparative responses of photosynthesis and growth to salinity were investigated for two C3 and one C4 species native to the tidal marshes of the San Francisco Bay-Sacramento River estuary of Northern California. At low salinities (0 or 150 meq l-1), where photosynthetic rates were maximal for all species, the C4 ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00377375
更新日期:1984-04-01 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::Organisms normally grow at a sub-maximal rate. After experiencing a period of arrested growth, individuals often show compensatory growth responses by modifying their life-history, behaviour and physiology. However, the strength of compensatory responses may vary across broad geographic scales as populations differ in...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-013-2754-0
更新日期:2014-01-01 00:00:00
abstract::In most animals, siblings from a given reproductive event emerge over a very short period of time. In contrast, many species of birds hatch their young asynchronously over a period of days or weeks, handicapping last-hatched chicks with an age and size disadvantage. Numerous studies have examined the adaptive signific...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-004-1727-8
更新日期:2005-01-01 00:00:00
abstract::During unusually wet years the salinity of the Great Salt Lake (Utah) decreased from above 100 g/L to 50 g/L. This allowed the predaceous insect Trichocorixa verticalis to invade the pelagic region of the lake and reach a mean summer density of 52/m3. Concurrent changes in the pelagic ecosystem were: a decrease in the...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317215
更新日期:1992-02-01 00:00:00
abstract::There is an increasing ecological interest in understanding the gradients in H(2)(18)O enrichment in leaf water (i.e. a Péclet effect), because an appreciation of the significance of the Péclet effect is important for improving our understanding of the mechanistic processes affecting the (18)O composition of leaf wate...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-003-1449-3
更新日期:2004-02-01 00:00:00
abstract::Controls of fine dynamics were investigated in a Pinus palustris Mill. (longleaf pine) woodland subjected to two understory vegetation treatments (control versus removed) and four overstory treatments (no gap control, and canopy gaps of three sizes with constant total gap area per stand). Fine root (<2 mm diameter) dy...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-002-1098-y
更新日期:2003-01-01 00:00:00
abstract::This study quantified both the age- and sex-specific survival rates of juveniles and adults, and tested for interannual differences in age-specific survival rates of the southern elephant seal population at Marion Island. Pups were tagged on an annual basis from 1983 onwards at Marion Island, and a consistent recaptur...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050922
更新日期:1999-11-01 00:00:00
abstract::This study investigated seasonal variation in the origin of water used by plants in a riparian tropical rainforest community and explored linkages between plant water source, plant xylem hydraulic conductivity and response to the onset of dry conditions. The study focused on five co-dominant canopy species, comprising...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-003-1352-y
更新日期:2003-11-01 00:00:00