Abstract:
:Theory suggests that source-sink dynamics can allow coexistence of intraguild predators and prey, but empirical evidence for this coexistence mechanism is limited. We used capture-mark-recapture, genetic methods, and stable isotopes to test whether source-sink dynamics promote coexistence between stream fishes, the intraguild predator, and stream salamanders (Dicamptodon aterrimus), the intraguild prey. Salamander populations from upstream reaches without fish were predicted to maintain or supplement sink populations in downstream reaches with fish. We found instead that downstream reaches with fish were not sinks even though fish consumed salamander larvae-apparent survival, recruitment, and population growth rate did not differ between upstream and downstream reaches. There was also no difference between upstream and downstream reaches in net emigration. We did find that D. aterrimus moved frequently along streams, but believe that this is a response to seasonal habitat changes rather than intraguild predation. Our study provides empirical evidence that local-scale mechanisms are more important than dispersal dynamics to coexistence of streams salamanders and fish. More broadly, it shows the value of empirical data on dispersal and gene flow for distinguishing between local and spatial mechanisms of coexistence.
journal_name
Oecologiajournal_title
Oecologiaauthors
Sepulveda AJ,Lowe WHdoi
10.1007/s00442-011-1935-ysubject
Has Abstractpub_date
2011-08-01 00:00:00pages
1043-54issue
4eissn
0029-8549issn
1432-1939journal_volume
166pub_type
杂志文章相关文献
OECOLOGIA文献大全abstract::Adaptations to aridity of the reedfrog Hyperolius viridiflavus nitidulus, living in different parts of the season-ally very dry and hot West African savanna, are investigated. 1. During the dry season mainly juveniles (weighing 200-600 mg) were found in the field. A very low rate of evaporative water loss (EWL; about ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00378769
更新日期:1986-03-01 00:00:00
abstract::Most research on the demography of wild animal populations has focused on characterizing the variation in the mortality of organisms as a function of intrinsic and environmental characteristics. However, such variation in mortality is difficult to relate to functional life history components (e.g. reproduction, disper...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-016-3597-2
更新日期:2016-07-01 00:00:00
abstract::Short-term responses of producers highlight that key nutrients (e.g., N, P)-or combinations of these nutrients-limit primary production in aquatic and terrestrial ecosystems. These discoveries continue to provide highly valuable insights, but it remains important to ask whether nutrients always predominantly limit pro...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-007-0948-z
更新日期:2008-04-01 00:00:00
abstract::We tested several assumptions and predictions of host-quality-dependent sex allocation theory (Charnov et al. 1981) with data obtained for the parasitoid Metaphycus stanleyi Compere on its host, brown soft scale (Coccus hesperidum L.), in a California citrus grove and in the laboratory. Scales ceased growing after par...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050616
更新日期:1998-10-01 00:00:00
abstract::Adjustment of hydraulic architecture in response to environmental conditions was studied in two warm-desert sub-shrubs, Hymenoclea salsola and Ambrosia dumosa, both at the level of genetic adaptation along a climatic gradient and plastic response to immediate growth conditions. Individuals of both species originating ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/PL00008879
更新日期:2000-10-01 00:00:00
abstract::Aggregations of different-looking animals are frequently seen in nature, despite well-documented selection pressures on individuals to maintain phenotypically homogenous groups. Two well-known theories, the 'confusion effect' (reduced ability of a predator to accurately target an individual in a group) and the 'oddity...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2473-y
更新日期:2013-05-01 00:00:00
abstract::The patterns of flower visitation by lizards (Podarcis lilfordi, Lacertidae) and insects (mainly flies, bees and wasps) on the shrub Euphorbia dendroides, were studied in the island of Cabrera (Balearic Islands) during the flowering seasons of 1995 and 1996. Lizards act as true pollinators of the plant, moving large q...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/PL00008816
更新日期:1997-07-01 00:00:00
abstract::The photosynthetic pathways of 42 species of the genusEuphorbia growing wild, naturalized or cultivated in Egypt were investigated. The criteria used included the δ13C- and δD-values and Kranz anatomy of the leaves. There is a relationship between the photosynthetic pathway and the ecological conditions in the habitat...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00320421
更新日期:1991-09-01 00:00:00
abstract::In a North Carolina population of Diamorpha smallii, densities were artificially manipulated by thinning stands to predetermined densities. Individuals in areas of high density produce fewer seeds than individuals at low density in the same habitat. Three components of fecundity, the number of flowers per plant, the n...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00344643
更新日期:1981-10-01 00:00:00
abstract::Understanding and explaining the causes of variation in food-chain length is a fundamental challenge for community ecology. The productive-space hypothesis, which suggests food-chain length is determined by the combination of local resource availability and ecosystem size, is central to this challenge. Two different a...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-007-0798-8
更新日期:2007-10-01 00:00:00
abstract::The effects of notonectid-induced crests on growth and reproduction, and resource allocation to crest construction, moult losses and eggs of Daphnia carinata were measured. An attempt was made to elucidate the mechanisms of physiological costs of crest induction for this species. The crested morph of d. carinata reach...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00323161
更新日期:1994-03-01 00:00:00
abstract::Data in the literature that in the Netherlands Carabus problematicus is an autumn breeder with overwintering larvae and adults have been confirmed. Pitfall catches show two peaks of adult beetles. The first small peak of activity is realized in May, the significance of which is not yet understood. The second higher pe...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00346470
更新日期:1980-05-01 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::Analysis of the degree of order in species assemblages in terms of nested subsets has received increased interest during the last decade. However, recently a series of papers have questioned the validity of methods employed for testing whether observed patterns deviate from random expectations. The current view seems ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420000601
更新日期:2001-05-01 00:00:00
abstract::Theory predicts persistence of long-term family relationships in vertebrates will occur until perceived fitness costs exceed benefits to either parents or offspring. We examined whether increased breeding probability and survival were associated with prolonged parent-offspring and sibling-sibling relationships in a lo...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-016-3595-4
更新日期:2016-07-01 00:00:00
abstract::Density dependence and environmental stochasticity are both potentially important processes influencing population demography and long-term population growth. Quantifying the importance of these two processes for population growth requires both long-term population as well as individual-based data. I use a 30-year dat...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-007-0677-3
更新日期:2007-06-01 00:00:00
abstract::Climate change causes species range expansions to higher latitudes and altitudes. It is expected that, due to differences in dispersal abilities between plants and soil biota, range-expanding plant species will become associated with a partly new belowground community in their expanded range. Theory on biological inva...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-020-04749-y
更新日期:2020-10-01 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::Small forest dwelling mammals are considered to be major consumers and vectors of hypogeous ectomycorrhizal (ECM) fungi, which have lost the ability of active spore discharge. Fungal spore dispersal by mycophagy is deemed an important process involved in forest regeneration, resilience and vitality, primarily based on...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2303-2
更新日期:2012-10-01 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::Correlations between environmental parameters and the distribution of four chromosomal taxa in the acridine grasshopperCaledia captiva (F.) have been analyzed. A bioclimate prediction system (BIOCLIM) was used as a model to determine their bioclimatic envelopes and to predict their probable geographic distributions, b...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00776409
更新日期:1988-05-01 00:00:00
abstract::Abiotic drivers of environmental stress have been found to induce CAM expression (nocturnal carboxylation) in facultative CAM species such as Mesembryanthemum crystallinum. The role played by biotic factors such as competition with non-CAM species in affecting CAM expression, however, remains largely understudied. Thi...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-017-3868-6
更新日期:2017-06-01 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::Erythronium japonicum (Liliaceae) inhabits deciduous mesic forests of Hokkaido, northern Japan. Myrmecochory of this species was investigated, especially the dispersal frequency, the effect of seed predators and the seed fall pattern. In the quadrat census using marked seeds of E. japonicum, the ant Myrmica kotokui fr...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00329708
更新日期:1996-06-01 00:00:00
abstract::Many species of planktonic cladocerans display substantial variation in habitat use (mean depth and diel vertical migration), both among and within populations. We examined whether clonal segregation and specialization contributes to such behavioral variation within several lake populations of the cladoceran, Daphnia ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050117
更新日期:1997-02-01 00:00:00
abstract::With multiple species introductions and rapid global changes, there is a need for comprehensive invasion models that can predict community responses. Evidence suggests that abiotic constraint, propagule pressure, and biotic resistance of resident species each determine plant invasion success, yet their interactions ar...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-3188-z
更新日期:2015-05-01 00:00:00
abstract::Diel vertical migration (DVM) of herbivorous zooplankton is a widespread behavioural phenomenon in freshwater ecosystems. So far only little attention has been paid to the impact of DVM on the phytoplankton community in the epilimnion. Some theoretical models predict that algal population growth in the epilimnion shou...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-004-1645-9
更新日期:2004-11-01 00:00:00
abstract::Frugivorous birds disperse the seeds of many fruit-bearing plants, but the fate of seeds after defecation or regurgitation is often unknown. Some rodents gather and scatter hoard seeds, and some of these may be overlooked, germinate, and establish plants. We show that these two disparate modes of seed dispersal are li...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-005-0125-1
更新日期:2005-09-01 00:00:00
abstract::The mycobiont of the high-light-susceptible forest lichen Lobaria pulmonaria was shown to deposit brown, melanic compounds in the outer layer of the upper cortex, depending on the long-term level of solar radiation in its natural habitat. Furthermore, pale thalli from a shady habitat produced melanic compounds after t...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420000541
更新日期:2001-02-01 00:00:00
abstract::Patterns of β-diversity can provide insight into forces shaping community assembly. We analyzed species-rich insect assemblages in two reserve fragments that had once been part of one contiguous Mediterranean coastal pine forest. Local environments are still similar across both fragments, but their landscape context d...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-021-04861-7
更新日期:2021-02-01 00:00:00