Abstract:
:Beaver (Castor canadensis) affect the benthic invertebrate community of small woodland streams in Quebec through habitat modifications. Their activities influence community structure through the replacement of lotic taxa by lentic forms and community function by increasing the absolute importance of collectors and predators while decreasing the relative importance of shredders and scrapers in impounded sites. At our study site during the 1983 ice-free season, standing stocks of coarse particulate organic matter (>1 mm) were 2-5 times greater (P<0.05) in impounded sites than riffle sites in spring and summer. Fine (212 μm-1 mm) and very fine (0.5 μm-212 μm) particulate organic matter were 3-10 times greater (P<0.05) in impounded sites in all seasons. Chlorophyll a standing stocks did not differ statistically among sites. Total density and biomass of invertebrates in impoundments were 2-5 times greater (P<0.05) than riffle sites in spring and summer, but statistically similar in autumn. Generic diversity (H') was greater (P<0.05) in unaltered sites in autumn. Non-impounded sites were dominated by Simuliidae, Tanytarsini chironomids, scraping mayflies and net spinning caddisflies while impounded sites were characterized by Tanypodinae and Chironomini chironomids, predacious odonates, Tubificidae, and filtering pelycopods. Our results suggest that current paradigms applied to lotic ecosystems need to be reevaluated to incorporate the influence of beaver upon invertebrate communities.
journal_name
Oecologiajournal_title
Oecologiaauthors
McDowell DM,Naiman RJdoi
10.1007/BF00378759subject
Has Abstractpub_date
1986-03-01 00:00:00pages
481-489issue
4eissn
0029-8549issn
1432-1939pii
10.1007/BF00378759journal_volume
68pub_type
杂志文章相关文献
OECOLOGIA文献大全abstract::Changing environments can have divergent effects on biodiversity-ecosystem function relationships at alternating trophic levels. Freshwater mussels fertilize stream foodwebs through nutrient excretion, and mussel species-specific excretion rates depend on environmental conditions. We asked how differences in mussel di...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-011-2110-1
更新日期:2012-02-01 00:00:00
abstract::Predators attack and plants defend, so herbivores face the dilemma of how to eat enough without being eaten. But do differences in the personality of herbivores affect the foraging choices of individuals? We explored the ecological impact of personality in a generalist herbivore, the brushtail possum (Trichosurus vulp...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-3110-8
更新日期:2015-01-01 00:00:00
abstract::Short-term effects of environmental perturbations on various life history traits are reasonably well documented in birds and mammals. But, in the present context of global climate change, there is a need to consider potential long-term effects of natal conditions to better understand and predict the consequences of th...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-009-1482-y
更新日期:2010-02-01 00:00:00
abstract::The effects of pollination, predispersal seed predation, and plant density upon seed production of Astragalus canadensis L. in a tall-grass prairie were studied by experimental manipulation of plant density. Seed production was greater at high than low plant densities; this was inferred to result from differences in p...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00345095
更新日期:1974-03-01 00:00:00
abstract::We report a new obligate pollination mutualism involving the senita cactus, Lophocereus schottii (Cactaceae, Pachyceereae), and the senita moth, Upiga virescens (Pyralidae, Glaphyriinae) in the Sonoran Desert and discuss the evolution of specialized pollination mutualisms. L. schottii is a night-blooming, self-incompa...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050459
更新日期:1998-04-01 00:00:00
abstract::Growth of woody species has two components, one pertaining to increment of biomass, the other to the architectonic arrangement of dry matter in space. Only the combination of both components explained the competitive strength of species that dominate in different stages of a hedgerow succession in Central Europe. Biom...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00378296
更新日期:1985-06-01 00:00:00
abstract::Gas exchange characteristics in leaves of the sclerophyll shrub Quercus coccifera were studied in the natural habitat in Portugal during spring and during the summer dry period. Compared to other sclerophyll species growing at the same site, photosynthesis in leaves of Quercus coccifera was less affected by water stre...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00378446
更新日期:1985-08-01 00:00:00
abstract::As the Arctic warms, tundra vegetation is becoming taller and more structurally complex, as tall deciduous shrubs become increasingly dominant. Emerging studies reveal that shrubs exhibit photosynthetic resource partitioning, akin to forests, that may need accounting for in the "big leaf" net ecosystem exchange models...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-016-3646-x
更新日期:2016-09-01 00:00:00
abstract::The demographic and ecological characteristics of island populations of small mammals have received increasing attention in recent years, but few studies have compared the behavioral characteristics of island populations with those of mainland populations. Behavior is considered an important variable because it is bel...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00540916
更新日期:1981-01-01 00:00:00
abstract::Many small organisms in various life stages can be transported in the digestive system of larger vertebrates, a process known as endozoochory. Potential dispersal distances of these "propagules" are generally calculated after monitoring retrieval in experiments with resting vector animals. We argue that vectors in nat...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2293-0
更新日期:2012-09-01 00:00:00
abstract::Many global change drivers chronically alter resource availability in terrestrial ecosystems. Such resource alterations are known to affect aboveground net primary production (ANPP) in the short term; however, it is unknown if patterns of response change through time. We examined the magnitude, direction, and pattern ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-015-3230-9
更新日期:2015-04-01 00:00:00
abstract::Recent research has shown that many mutualistic communities display non-random structures. While our understanding of the structural properties of mutualistic communities continues to improve, we know little of the biological variables resulting in them. Mutualistic communities include those formed between ants and ex...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-010-1673-6
更新日期:2010-11-01 00:00:00
abstract::Populations with dispersive larvae are often demographically open such that local reproduction and subsequent larval settlement are not linked. Thus, understanding whether and how settlement patterns are established and subsequently modified is central to understanding local demography. Settlement is typically not mea...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-001-0860-x
更新日期:2002-03-01 00:00:00
abstract::Plasticity in the physiological and behavioural responses of animals to prolonged food shortages may determine the persistence of species under climate warming. This is particularly applicable for species that can "adaptively fast" by conserving protein to protect organ function while catabolizing endogenous tissues. ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-017-4023-0
更新日期:2018-02-01 00:00:00
abstract::In arctic tundra soil, oxygen depletion associated with soil flooding may control plant growth either directly through anoxia or indirectly through effects on nutrient availability. This study was designed to evaluate whether plant growth and physiology of two arctic sedge species are more strongly controlled by the d...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00328369
更新日期:1995-11-01 00:00:00
abstract::We describe differences in senescence among populations of grasshoppers that occur along an altitudinal gradient in the Sierra Nevada, California. Experimental males from five populations of the Melanoplus sanguinipes/devastator sibling species complex were reared in each of two thermal culture conditions from eggs of...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050246
更新日期:1997-07-01 00:00:00
abstract::The regularly inundated region of the middle Amazon river together with its marginal lakes is characterized by special hydrographic, hydrochemical and biological conditions [1-4]. It is called "Várzea". Regular investigations of such Várzea lakes revealed several correlations between changes in water level, thermic an...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00360514
更新日期:1973-09-01 00:00:00
abstract::We tested the hypothesis that generally higher levels of herbivory on bittercress in sun vs in shade, especially by leaf miners, were related to the earlier phenological development of plants in the sun. Naturally-occurring plants in the sun were taller and had longer leaves than did those in the shade during the firs...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00378247
更新日期:1989-04-01 00:00:00
abstract::Ecologists have long debated the role of predation in mediating the coexistence of prey species. Theory has mainly taken a bitrophic perspective that excludes the effects of inducible defenses at different trophic levels. However, inducible defenses could either limit or enhance the effects of predation on coexistence...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-008-1111-1
更新日期:2008-10-01 00:00:00
abstract::Data are presented on the influence of Athous subfuscus larvae (Coleoptera, Elateridae) on the microbial carbon cycle in the biotically most active horizons of three contrasting beech forest soils: the Ah horizon of a mull soil on limestone (Göttinger Wald, FRG), the F/H horizon of a moder soil on new red sandstone (S...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00379044
更新日期:1989-08-01 00:00:00
abstract::Variation in plant resistance to pathogen infection is commonly observed in interactions between wild plants and their foliar pathogens. Models of host-pathogen interactions indicate that a large cost of infection is generally necessary to maintain this variation, yet there is limited evidence that foliar pathogens ca...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-006-0631-9
更新日期:2007-05-01 00:00:00
abstract::We sought to understand differences in tree response to meteorological drought among species and soil types at two ecotone forests in northern Arizona, the pinyon-juniper woodland/ponderosa pine ecotone, and the higher elevation, wetter, ponderosa pine/mixed conifer ecotone. We used two approaches that provide differe...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-004-1585-4
更新日期:2004-07-01 00:00:00
abstract::Shorter male larval and pupal durations were sufficient to produce the protandrous emergence pattern of the black swallowtail butterfly. In 9 broods observed under natural conditions, the first male was seen 7.1±6.5 days before the first female, although the peak of captures relative to the first capture was similar i...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00389003
更新日期:1982-06-01 00:00:00
abstract::On a shallow sand flat at Princess Royal Harbour near Albany, Western Australia, the brown macrophyte Hormosira banksii attaches to shells of infaunal bivalves. Hormosira occupies shells of Katelysia rhytiphora in preference to K. scalarina. We proposed and tested four hypotheses to explain this host occupation patter...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00377510
更新日期:1987-09-01 00:00:00
abstract::Herbivore damage often deters pollinator visitation and many invasive plants in North America are pollinator-dependent. This has important implications for the biological control of invasive plants because it means that agents that deter pollinators may have a larger than expected impact on the plant. Yet interactions...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-013-2750-4
更新日期:2014-01-01 00:00:00
abstract::A major goal of modern ecology is to understand macroecological patterns based on their mechanistic underpinnings. The metabolic theory of ecology predicts a monotonic increase of biodiversity with temperature based on the principles of metabolism. For marine copepods, observations have shown that while biodiversity d...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2313-0
更新日期:2012-10-01 00:00:00
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, ...
journal_title:Oecologia
pub_type: 杂志文章,评审
doi:10.1007/s00442-011-2204-9
更新日期:2012-06-01 00:00:00
abstract::Reproductive traits are tightly linked to plant fitness and may therefore be mechanisms driving biological invasions, including the greater success of more phylogenetically novel introduced species in some systems. We present a phylogenetic comparative analysis of "Baker's law'', that introduced plants with the abilit...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-011-1929-9
更新日期:2011-08-01 00:00:00
abstract::Growth and reproduction of twoDaphnia species (Cladocera) from Lake Constance were measured experimentally in a through-flow laboratory system under different food conditions, in order to investigate the effect of food quality on zooplankton populations. The cryptomonadRhodomonas sp. and the diatomStephanodiscus hantz...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00634599
更新日期:1991-09-01 00:00:00
abstract::Male dragonflies of the species Aeschna cyanea pay several visits per day to a suitable pond in search of mates. The influence of the population density upon the daily duration of presence of single dragonfly males was investigated by means of multiple regression analysis. Several environmental factors were also consi...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00384579
更新日期:1974-12-01 00:00:00