Abstract:
:Cottonwoods are dominant riparian trees of the western United States and are known for their propensity to hybridize. We compared the decomposition of leaf litter from two species (Populus angustifolia and P. fremontii) and their hybrids. Three patterns were found. First, in one terrestrial and two aquatic experiments, decomposition varied twofold among tree types. Second, backcross hybrid leaves decomposed more slowly than those of either parent. Third, the variation in decomposition between F1 and backcross hybrids was as great as the variation between species. These results show significant differences in decomposition in a low-diversity system, where >80% of the leaf litter comes from just two species and their hybrids. Mechanistically, high concentrations of condensed tannins in leaves appear to inhibit decomposition (r 2=0.63). The initial condensed tannin concentration was high in narrowleaf leaves, low or undetectable in Fremont leaves, and intermediate in F1 hybrid leaves (additive inheritance). Backcross hybrids were high in condensed tannins and were not different from narrowleaf (dominant inheritance). Neither nitrogen (N) concentration nor the ratio of ash-free dry weight to N (a surrogate for carbon:nitrogen ratio) were significantly correlated with decomposition. The N content of leaf material at the end of each year's experiment was inversely correlated with rates of litter mass loss and varied 1.6- to 2.1-fold among tree classes. This result suggests that hybrids and their parental species are used differently by the microbial community.
journal_name
Oecologiajournal_title
Oecologiaauthors
Driebe EM,Whitham TGdoi
10.1007/s004420050994subject
Has Abstractpub_date
2000-04-01 00:00:00pages
99-107issue
1eissn
0029-8549issn
1432-1939pii
10.1007/s004420050994journal_volume
123pub_type
杂志文章相关文献
OECOLOGIA文献大全abstract::Characterizing the causes of spatial and temporal variation in parasite-induced mortality under natural conditions is crucial to better understanding the factors driving host population dynamics. Our goal was to quantify this variation in the amphipod Paracalliope novizealandiae, a second intermediate host of the trem...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-010-1593-5
更新日期:2010-07-01 00:00:00
abstract::General scaling rules or constants for metabolic and structural plant allometry as assumed by the theory of Euclidian geometric scaling (2/3-scaling) or metabolic scaling (3/4-scaling) may meet human's innate propensity for simplicity and generality of pattern and processes in nature. However, numerous empirical works...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-011-2240-5
更新日期:2012-07-01 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::Natural abundance of (15)N and [N] was studied in thalli of mat-forming lichens collected from tundra and heathland sites in the northern and southern hemispheres. The study includes samples of British Cladonia portentosa from sites in regions of high and low N-loading and in heathland growing both directly on peat an...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-003-1201-z
更新日期:2003-06-01 00:00:00
abstract::Mycorrhizal fungi are crucial for the ecological success of land plants, providing their hosts with nutrients in exchange for organic C. However, not all plants are mycorrhizal, especially ferns, of which about one-third of the species lack this symbiosis. Because the mycorrhizal status is evolutionarily ancestral, th...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-2941-7
更新日期:2014-07-01 00:00:00
abstract::The duration times of the eggs, nauplii and copepodites of Cyclops vicinus and Eudiaptomus gracilis were obtained, by experiment, at 5, 10, 15 and 20°C. In contrast with previously published work on copepod development, the ovigerous females, used in the cultures at these temperatures, were removed from a water storag...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00344742
更新日期:1974-12-01 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::Increasing concern about loss of biodiversity and its effects on ecosystem functioning has triggered a series of manipulative experiments worldwide, which have demonstrated a general trend for ecosystem functioning to increase with diversity. General mechanisms proposed to explain diversity effects include complementa...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-013-2815-4
更新日期:2014-03-01 00:00:00
abstract::Diapause allows insects to temporally avoid conditions that are unfavorable for development and reproduction. However, diapause may incur a cost in the form of reduced metabolic energy reserves, reduced potential fecundity, and missed reproductive opportunities. This study investigated a hitherto ignored consequence o...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-006-0428-x
更新日期:2006-08-01 00:00:00
abstract::Fluxes of CO2 and N2O were measured from both natural and experimentally augmented snowpacks during the winters of 1993 and 1994 on Niwot Ridge in the Colorado Front Range. Consistent snow cover insulated the soil surface from extreme air temperatures and allowed heterotrophic activity to continue through much of the ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/PL00008814
更新日期:1997-04-01 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::We compared prefledging growth, energy expenditure, and time budgets in the arctic-breeding red knot (Calidris canutus) to those in temperate shorebirds, to investigate how arctic chicks achieve a high growth rate despite energetic difficulties associated with precocial development in a cold climate. Growth rate of kn...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-002-1124-0
更新日期:2003-02-01 00:00:00
abstract::Climate change effects on plants are expected to be primarily mediated through early life stage transitions. Snowfall variability, in particular, may have profound impacts on seedling recruitment, structuring plant populations and communities, especially in mid-latitude systems. These water-limited and frequently inva...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-3180-7
更新日期:2015-02-01 00:00:00
abstract::Female lifetime reproductive success in a small population of individually-marked adders in southern Sweden was studied over a period of seven years. Reproductive characteristics varied little from year to year and were consistent through time in individual females. Most females mature at four years of age and reprodu...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317260
更新日期:1992-10-01 00:00:00
abstract::Species of the 'bana' vegetation in the Amazonas region of equatorial South America have scleromorphic leaves. This leaf type, which characterizes the vegetation of Mediterranean climates, among others, has apparently evolved in this community in response to the oligotrophic soils and widely fluctuating water table.An...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00540202
更新日期:1980-01-01 00:00:00
abstract::The species composition of vesicular-arbuscular mycorrhizal (VAM) fungal communities changed during secondary succession of abandoned fields based on a field to forest chronosequence. Twenty-five VAM fungal species were identified. Seven species were clearly early successional and five species were clearly late succes...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317600
更新日期:1991-05-01 00:00:00
abstract::Juvenile habitat use and early life migratory behaviors of successfully recruited adult fish provide unique insight into critical habitats for a population, and this information allows restoration plans to be tailored to maximize benefits. Retrospective analysis of adult otolith chemistry combined with fish-otolith gr...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-015-3443-y
更新日期:2016-01-01 00:00:00
abstract::External hyphae of vesicular-arbuscular mycorrhizal (VAM) fungi were quantified over a growing season in a reconstructed tallgrass prairie and an ungrazed cool-season pasture. In both sites, hyphal lengths increased throughout the growing season. Peak external hyphal lengths were 111 m cm-3 of soil in the prairie and ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00328420
更新日期:1995-07-01 00:00:00
abstract::As humans continue to alter tropical landscapes across the world, it is important to understand what environmental factors help determine the persistence of biodiversity in modified ecosystems. Studies on well-known taxonomic groups can offer critical insights as to the fate of biodiversity in these modified systems. ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-015-3495-z
更新日期:2016-03-01 00:00:00
abstract::Trap-nesting bees and wasps (Hymenoptera Aculeata) colonizing crop and fallow fields in an agricultural landscape were studied using 20 sown fields (pea, barley, rye, clover-grass mixtures, Phacelia tanacetifolia) and 20 fields with naturally developed vegetation (1- and 2-year old fields, both mown and unmown, and ol...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00326084
更新日期:1994-06-01 00:00:00
abstract::Most models of parental investment in offspring assume a trade-off between propagule size and number, and an increasing "concave down" function relating offspring fitness to propagule size. In this study, we test these two fundamental assumptions, using three closely related species of crickets, Gryllus firmus, G. vel...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00329806
更新日期:1995-06-01 00:00:00
abstract::The gas exchange characteristics of two C3 desert annuals with contrasting phenologies, Geraea canescens T. & G. (winter-active) and Dicoria canescens T. & G. (summer-active), both Asteraceae, were determined for plants grown under a moderate (25°/15° C, day/night temperature) and a high (40°/27° C) growth temperature...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00384484
更新日期:1982-11-01 00:00:00
abstract::Interspecific relationships such as mutualism and parasitism are major drivers of biodiversity. Because such interactions often comprise more than two species, ecological studies increasingly focus on complex multispecies systems. However, the spatial heterogeneity of multi-species interactions is often poorly underst...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-013-2615-x
更新日期:2013-09-01 00:00:00
abstract::The compensatory growth potential of a grazed fungal biomass was mathematically expressed as a function of patchiness in its distribution and demonstrated in an experiment using the fungivorous collembolan Onychiurus armatus and the soil fungi Verticillium bulbillosum and Penicillium spinulosum. The model addresses th...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317684
更新日期:1993-03-01 00:00:00
abstract::Most aphids show cyclical parthenogenesis, have short generation times and complete several generations each season. Two hypotheses have been proposed to account for the adaptive seasonal trends observed in the reproductive strategies of aphids. Firstly, individuals of each generation modify their reproductive strateg...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050422
更新日期:1998-03-01 00:00:00
abstract::Invasive species are capable of altering ecosystems through the consumption of basal resources. However, quantifying the effects of invasive species in large ecosystems is challenging. Measuring changes in basal resources (i.e., phytoplankton) at an ecosystem scale is an important and potentially translatable response...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-017-3937-x
更新日期:2017-10-01 00:00:00
abstract::Data on flower colour polymorphism were recorded for 341 of some 426 species of Erica occurring in the south-western Cape, South Africa. Thirty-eight per cent of these Erica species are colour polymorphic, the incidence of polymorphism being greater than expected for ornithophilous species and lower than expected for ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00379677
更新日期:1985-03-01 00:00:00
abstract::Principal and reduced major axes, and Bulmer's (1975) tests have been suggested as methods for detecting the presence of density dependence in a series of population censuses that are unsuitable for analysis by alternative means e.g. by k-factor analysis. These alternative methods are tested using census data, some of...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00378937
更新日期:1987-12-01 00:00:00
abstract::Interspecific competition is assumed to have a strong influence on the population dynamics of competing species, but is not easily demonstrated for mobile species in the wild. In the Florida Keys (USA), anecdotal observations have long pointed to an inverse relationship in abundance of two large decapod crustaceans fo...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-017-3844-1
更新日期:2017-05-01 00:00:00
abstract::Many plant species currently exist in fragmented populations of different sizes, while they also experience unpredictable climatic fluctuation over time. However, we still understand little about how plant demography responds to such spatial and temporal environmental variability. We studied population dynamics of an ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-009-1505-8
更新日期:2010-04-01 00:00:00