Abstract:
:In many species, fecundity is dependent on age. For some populations - particularly those exploiting temporally variable environments - these age-specific fecundities may themselves vary with time. In this report, we investigate the general effects of age and time on clutch size in a wild population of Lesser Snow Geese (Anser caerulescens caerulescens). We show that both factors affect clutch size independently. Age effects are confined almost exclusively to the two, three and four year old age classes. Mean clutch sizes of all age classes show considerable inter-seasonal variation. These temporal differences in fecundity will ultimately influence the dynamics of the population. In particular, they imply that there will be no convergence to a constant growth rate or a stable age distribution.
journal_name
Oecologiajournal_title
Oecologiaauthors
Rockwell RF,Scott Findlay C,Cooke Fdoi
10.1007/BF00379706subject
Has Abstractpub_date
1983-02-01 00:00:00pages
318-322issue
2-3eissn
0029-8549issn
1432-1939pii
10.1007/BF00379706journal_volume
56pub_type
杂志文章相关文献
OECOLOGIA文献大全abstract::Optimal foraging theory is based on the assumption that at least some aspects of foraging behavior are genetically determined (Pyke et al. 1977; Kamil and Sargent 1980; Pyke 1984). Nonetheless, very few studies have examined the role of genetics in foraging behavior. Here, we report on geographical differences in the ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00380078
更新日期:1989-09-01 00:00:00
abstract:: Habitat fragmentation is becoming increasingly common, yet, the effect of habitat spatial structure on population dynamics remains undetermined for most species. Populations of a single species found in fragmented and nonfragmented habitat present a rare opportunity to examine the effect of habitat spatial structure ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050341
更新日期:1997-11-01 00:00:00
abstract::Parasites can generate complex life history trade-offs in a host. In this study, we experimentally reduced the infection level of intestinal helminth parasites in the Taiwan field mouse (Apodemus semotus) to test (1) whether parasite richness and load are biased towards male or female mice (sex-biased parasitism) and ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-3160-y
更新日期:2015-03-01 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 turnover of plant biomass largely determines the amount of energy flowing through an ecosystem and understanding the processes that regulate turnover has been of interest to ecologists for decades. Leaf life span theory has proven useful in explaining patterns of leaf turnover in relation to resource availability,...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-016-3674-6
更新日期:2016-10-01 00:00:00
abstract::The impacts of ungulates on small mammals in an East African savanna habitat were investigated by monitoring the population and community responses of small mammals on replicated 4-ha plots from which ungulates had been excluded. The dominant small mammal in this habitat is the pouched mouse, Saccostomusmearnsi, a med...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050601
更新日期:1998-09-01 00:00:00
abstract::Animals were acclimitized to a daily cycle of 15-25°C and a photoperiod of LD 12:12. Parietalectomized animals in an experimental thermal gradient (15°C-40°C, LD 12:12) selected significantly higher temperatures than controls at all hours of the day except from 0800-1200. These results suggest that the lizard parapine...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00345581
更新日期:1974-06-01 00:00:00
abstract::Soil properties of pioneer Pinus flexilis stands with similar topography and climate were investigated. Soils supporting this tree in association with Cercocarpus ledifolius were found to have higher percentages of total nitrogen than soils beneath similar stands lacking Cercocarpus.An excavated Cercocarpus ledifolius...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00345566
更新日期:1977-12-01 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
pub_type: 杂志文章
doi:10.1007/BF00317247
更新日期:1992-08-01 00:00:00
abstract::The importance of facilitative processes due to the presence of nitrogen-fixing legumes in temperate grasslands is a contentious issue in biodiversity experiments. Despite a multitude of studies of fertilization effects of legumes on associated nonfixers in agricultural systems, we know little about the dynamics in mo...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-006-0576-z
更新日期:2007-03-01 00:00:00
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
pub_type: 杂志文章
doi:10.1007/BF00378810
更新日期:1988-02-01 00:00:00
abstract::We tested the hypothesis that leaves of broad-leaved tree species are more highly defended at low latitudes than at high latitudes. We used canonical discriminant analysis to compare tree species from Panama (9°N, 39 species), Missouri, USA (38°N, 37 species), and southern Ontario, Canada (44°N, 34 species) with respe...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2249-4
更新日期:2012-07-01 00:00:00
abstract::The leaf area to sapwood area ratio (A l:A s) of trees has been hypothesized to decrease as trees become older and taller. Theory suggests that A l:A s must decrease to maintain leaf-specific hydraulic sufficiency as path length, gravity, and tortuosity constrain whole-plant hydraulic conductance. We tested the hypoth...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-002-0904-x
更新日期:2002-06-01 00:00:00
abstract::Food density, degree of hunger prior to foraging, and food processing difficulty were varied in order to determine their effects on the diet diversity of captive Peromyscus leucopus foraging for buried seeds. No relationship was found between diet diversity and food density. However, diet diversity exhibited a signifi...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00346970
更新日期:1980-07-01 00:00:00
abstract::In East African savanna we found that leaves of mature tree species with symbiotic N2 fixation contained lower concentrations of polyphenols than leaves of species without this symbiosis. We suggest that the root symbiosis is costly to the plant in terms of photosynthate that otherwise could be used in chemical defens...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317873
更新日期:1993-03-01 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::Decomposition of standing dead trees that were killed by fire was examined for 10 species in the Great Smoky Mountains National Park. The decrease in wood density as fire age increased was used to estimate decomposition rates. Quercus prinus had the fastest decay rate (11% yr-1) while Pinus virginiana had the slowest ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00363839
更新日期:1982-02-01 00:00:00
abstract::Although ontogenetic changes in the carbon isotope ratios of marine fauna have been well studied those of freshwater organisms have not. As a result, we may have a less than adequate assessment of the incorporation of allochthonous detritus into freshwater foodwebs. This study found a δ13C range of 9‰ for crayfish (Or...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00327908
更新日期:1996-07-01 00:00:00
abstract::Plant population and community dynamics may be altered by increasing atmospheric CO(2) concentrations [[CO(2)]] through intraspecific variation in the responses of vegetative and reproductive growth. Although these responses may be regulated by age at flowering, little is known about the direct effects of age at flowe...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-003-1186-7
更新日期:2003-04-01 00:00:00
abstract::Two atlantic voyages were made by the FS Meteor during which pollen and spores were collected from the air. In the course of 32 days the average pollen content was 29/100 m3 air, the average spore content came to 5x104/100 m3 air. Both voyages occurred in late autumn. On the trip from Hamburg to the Azores the spore c...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00345425
更新日期:1975-09-01 00:00:00
abstract:: Field phenologies of high- (ca. 1500 m) and low- (ca. 500 m) altitude populations of the two most common European species of dung flies, Scathophaga stercoraria and Sepsis cynipsea, differ quite markedly due to differences in climate. To differentiate genetic adaptation due to natural selection and phenotypic plastic...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050092
更新日期:1997-02-01 00:00:00
abstract::Growth and morphology of seedlings of ten tropical rain forest species were studied at Los Tuxtlas, Mexico. Seedlings were grown in three environmental conditions: the shaded forest understorey (FU, receiving 0.9-2.3% of the daily photosynthetic photon flux, PF, above the canopy), a small canopy gap of approx. 50 m2 (...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00776429
更新日期:1988-05-01 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::This study reports a rare example where a native herbivorous insect frequently overexploits local populations of its perennial host. Local dynamics of a flightless weevil (Hadramphus spinipennis, Curculionidae) and its host plant (Aciphylla dieffenbachii, Apiaceae) were assessed for one discrete patch. In this main st...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-002-0936-2
更新日期:2002-07-01 00:00:00
abstract::The intensity of resource exploitation by phytophagous insects is usually considered to reflect population size. For populations of two flowerhead-attacking tephritid flies, however, the resources utilised were not related to the numbers of searching adults. Tephritis bardanae Schrank attacked 11-13% of the total flow...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00318315
更新日期:1991-05-01 00:00:00
abstract::Sources of variation in floral nectar production were investigated in a natural population of Epilobium canum (Onagraceae), a hummingbird-pollinated herbaceous shrub. Field measurements showed significant phenotypic variation among plants in floral nectar production rates. Average variance among flowers within plants ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050185
更新日期:1997-05-01 00:00:00
abstract::Clonal plants have more traits enabling individual persistence (larger belowground storage of buds and assimilates), whereas non-clonal plants have more traits enabling population persistence (a higher reliance on regeneration from seeds). This difference presumably makes those groups respond differently to disturbanc...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-020-04724-7
更新日期:2020-08-01 00:00:00
abstract::Effects of temperature changes on phytoplankton communities seem to be highly context-specific, but few studies have analyzed whether this context specificity depends on differences in the abiotic conditions or in species composition between studies. We present an experiment that allows disentangling the contribution ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-016-3693-3
更新日期:2016-11-01 00:00:00
abstract::When heterospecific seabirds are part of a nesting colony, there may be less opportunity for conspecifics to come in direct contact with each other, resulting in lower intraspecific aggressiveness. To determine if individuals spend less time in aggressive behavior when nesting in conspecific rather than heterospecific...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050218
更新日期:1997-06-01 00:00:00
abstract::Hemiepiphytic species in the genera Clusia and Ficus were investigated to study their mode of photosynthetic metabolism when growing under natural conditions. Despite growing sympatrically in many areas and having the same growth habit, some Clusia species show Crassulacean acid metabolism (CAM) whereas all species of...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00378927
更新日期:1987-12-01 00:00:00