Abstract:
:Anuran amphibians have traditionally been considered suitable model organisms for community ecology studies. In this paper, we review and quantitatively re-analyze the original studies published on dietary relationships among anuran communities worldwide. We re-analyzed 33 independent communities from all continents, including data on prey numbers and/or prey volumes. All datasets underwent null model re-analysis using two randomization algorithms. In addition, logistic regression models were used to identify specific assemblage patterns. We discovered three main patterns: (1) one particular algorithm (RA2, which replaces every cell in the matrix with one randomly chosen, but retains the zero structure of the matrix) performed much better at uncovering community structure; (2) nonrandom structure was more likely to occur in tropical than in nontropical regions; (3) prey volume was a better descriptor of dietary relationships than prey number when attempting to detect nonrandom structure. We showed that: pattern (1) depended on both the overall generalist nature of the anurans in general and on the mathematical properties of RA2; pattern (2) was consistent with theoretical attributes of tropicality; and pattern (3) was due to the intrinsic ecological properties of generalist organisms, which forage more or less opportunistically on prey of very different sizes; hence, when prey number is used as a diet descriptor, there is a risk of approximating different prey taxa that make different relative volume contributions to the overall diet as being of similar relevance .
journal_name
Oecologiajournal_title
Oecologiaauthors
Vignoli L,Luiselli Ldoi
10.1007/s00442-011-2204-9subject
Has Abstractpub_date
2012-06-01 00:00:00pages
499-509issue
2eissn
0029-8549issn
1432-1939journal_volume
169pub_type
杂志文章,评审相关文献
OECOLOGIA文献大全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::Debate on the control of population dynamics in reef fishes has centred on whether patterns in abundance are determined by the supply of planktonic recruits, or by post-recruitment processes. Recruitment limitation implies little or no regulation of the reef-associated population, and is supported by several experimen...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00328615
更新日期:1995-08-01 00:00:00
abstract::The costs and benefits of resource integration in Hydrocotyle bonariensis were examined by comparing severed and intact clones grown across multiple resource gradients. Basipetal movement of water, nitrogen and photosynthates was demonstrated to occur between two rhizome branch systems interconnecting hundreds of rame...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317540
更新日期:1991-04-01 00:00:00
abstract::The natural occurrence of dogwood anthracnose (Discula destructiva) on young dogwood seedlings planted in different microenvironments in the southern Appalachian Mountains provided an opportunity to examine the effects of biotic stress on phenolic defense and insect herbivory. Dogwood trees planted in forest understor...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00318037
更新日期:1993-10-01 00:00:00
abstract::Intensive harvesting of native eucalypt forests is carried out in the Eden area in the south east coastal region of New South Wales, Australia. Soil nutrient capital and nutrient removals in forest harvesting were estimated together with potential impacts of these removals on the nutrient capital balance. Soils were a...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00377124
更新日期:1986-08-01 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::A large number of time series of abundances of insects and birds from a variety of data sets were submitted to a new density dependence test. The results varied enormously between data sets, but the relation between the frequency of statistically significant density dependence (SSDD) and the length of the series was s...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317444
更新日期:1993-10-01 00:00:00
abstract::In long-lived species, adult survival is the population parameter having the highest elasticity, and therefore, it can be expected to be least affected by climatic variations. We studied the dynamics and survival of breeding female common eiders Somateria mollissima mollissima in the Baltic Sea from 1960 to 2007. Usin...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-008-1265-x
更新日期:2009-04-01 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
pub_type: 杂志文章
doi:10.1007/BF00386726
更新日期:1982-10-01 00:00:00
abstract::Understanding how communities respond to extreme climatic events is important for predicting the impact of climate change on biodiversity. The plant vigor and stress hypotheses provide a theoretical framework for understanding how arthropods respond to stress, but are rarely tested at the community level. Following a ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-010-1684-3
更新日期:2010-11-01 00:00:00
abstract::Plant species and growth forms differ widely in litter chemistry, which affects decay and may have important consequences for plant growth via e.g. the release of nutrients and growth-inhibitory compounds. We investigated the overall short-term (9.5 months) and medium-term (21.5 months) feedback effects of leaf litter...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-006-0580-3
更新日期:2007-03-01 00:00:00
abstract::(1) Small saplings of Tilia cordata, when planted in deciduous woodlands, are damaged or destroyed by rodents. (2) Experiments with captive animals show that the damage is identical with that caused by bank voles. (3) Bank voles are present at all sites where damage occurs. (4) Small saplings of Betula spp. establishe...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00384942
更新日期:1985-10-01 00:00:00
abstract::The extent, frequency and causes of pollenlimited seed production were examined in partially selffertile populations of Blandfordia grandiflora for 2 years. Percentage seed set of open-pollinated plants (50-57%) did not differ within or between years, and was about 19% less than experimentally cross-pollinated plants ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00328430
更新日期:1995-07-01 00:00:00
abstract::The decomposition (meaning disappearance) of different leaf types and artificial leaves made from cellulose hydrate foil was studied in three forests - an alluvial forest (Ulmetum), a beech forest on limestone soil (Melico-Fagetum), and a spruce forest in soil overlying limestone bedrock.Fine, medium, and coarse mesh ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00379565
更新日期:1983-03-01 00:00:00
abstract::Bythotrephes cederstroemii Schoedler, a predatory freshwater zooplankter (Crustacea: Cladocera), was first found in the Laurentian Great Lakes in December 1984. The first individuals were from Lake Huron, followed in 1985 with records from Lakes Erie and Ontario. By late August, 1986 the species had spread to southern...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00378947
更新日期:1987-12-01 00:00:00
abstract::Corridors connect otherwise isolated habitat patches and can direct movement of animals among such patches. In eight experimental landscapes, we tested two hypotheses of how corridors might affect dispersal behavior. The Traditional Corridor hypothesis posits that animals preferentially leave patches via corridors, fo...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-005-0023-6
更新日期:2005-05-01 00:00:00
abstract::The number of tracheal gills in the larval Limnephilini varies according to oxygen conditions of the surrounding waters. High proportions of oxygen cause a significant decrease in the number of gills, whereas low oxygen concentrations retult in a significant increase in the number of gills. These morphological adapati...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00345744
更新日期:1974-06-01 00:00:00
abstract::Otolith microchemistry studies indicate that growth-phase (yellow stage) anguillid eels commonly shift at irregular intervals between fresh and saline waters, but this technique has not detected regular seasonal migrations across salinity zones. We tested the ability of otolith microchemistry and stable isotope analys...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-2969-8
更新日期:2014-08-01 00:00:00
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 resource-limited savannas, the distribution and abundance of fine roots play an important role in acquiring essential resources and structuring vegetation patterns and dynamics. However, little is known regarding the three-dimensional distribution of fine roots in savanna ecosystems at the landscape scale. We quant...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-018-4083-9
更新日期:2018-04-01 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
abstract::It has commonly been assumed that pollinator energy intake increases with flowering plant density, and visitation to flowers should therefore be higher in denser stands. I therefore investigated the relationship between flight distance and flight time for bumblebees and butterflies foraging on Senecio integerrimus and...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00379326
更新日期:1983-10-01 00:00:00
abstract::Well watered plants of Vigna unguiculata (L.) Walp cv. California Blackeye No. 5 had maximum photosynthetic rates of 16 μmol m-2 s-1 (at ambient CO2 concentration and environmental parameters optimal for high CO2 uptake). Leaf conductance declined with increasing water vapour concentration difference between leaf and ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00378820
更新日期:1988-02-01 00:00:00
abstract::The hypothesis that carnivorous plants are less responsive to prey at high soil nutrient levels than at lower levels (Givnish et al. 1984) is tested on four plant species (Drosera rotundifolia, Pinguicula alpina, P. villosa and P. vulgaris) from a subarctic environment. The response, measured in terms of seven charact...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317381
更新日期:1991-03-01 00:00:00
abstract::Fluctuations in the abundance of main prey species might shape animal communities, by inducing numerical responses and dietary shifts in predators. Whether numerical responses and dietary shifts differ among individuals of different age and sex has so far gained little attention. These differences could affect how muc...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-020-04607-x
更新日期:2020-03-01 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
pub_type: 杂志文章
doi:10.1007/PL00008877
更新日期:2000-09-01 00:00:00
abstract::Nitrogen (N2) fixation was estimated along an aridity gradient in Namibia from the natural abundance of 15N (δ15N value) in 11 woody species of the Mimosacease which were compared with the δ15N values in 11 woody non-Mimosaceae. Averaging all species and habitats the calculated contribution of N2 fixation (N f ) to le...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317592
更新日期:1991-11-01 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::Numerous animals have successfully invaded urban habitats, although the factors associated with invasion success remain poorly understood. Urban areas are characterized by warmer microclimates, higher levels of primary productivity, longer breeding seasons and higher levels of pollutants. All these factors should caus...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-009-1525-4
更新日期:2010-05-01 00:00:00
abstract::(i) The growth of ca. 100 individuals of a small deciduous tree Euphorbia pyrifolia, of different ages and edaphic regimes, and with different levels of infestation by the coccid Icerya seychellarum, has been studied on Aldabra Atoll over two years (1976-1978). Infestation on leaves ranged between 0 and 1.3 mg dry wei...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00540123
更新日期:1980-01-01 00:00:00