Amino acid abundance and proteolytic potential in North American soils.

abstract：:Development of ornamental characters exposed to directional selection may be particularly sensitive to the effect of parasitic infections. Antlers are ornamental characters of importance in intraspecific interactions, and are in reindeer (Rangifer) developed by both males and females. By antihelmintic treatment of nat...

journal_title：Oecologia

authors： Folstad I,Arneberg P,Karter AJ

更新日期：1996-03-01 00:00:00

abstract：:We tested the hypothesis whether differences between plant populations in root colonization by arbuscular mycorrhizal (AM) fungi could be caused by genetic differentiation between populations. In addition, we investigated whether the response to AM fungi differs between plants from different populations and if it is a...

journal_title：Oecologia

authors： Pánková H,Münzbergová Z,Rydlová J,Vosátka M

更新日期：2008-08-01 00:00:00

abstract：:Branch sampling of branch diameter and fruit crop on 22 species of Barbadian trees and shrubs provided sufficient data to build regressions between plant size and fruit crop weight. Orchard plants bear much more fruit than wild, feral or garden plants of similar size, but this difference disappears in multiple regress...

journal_title：Oecologia

authors： Peters RH,Cloutier S,Dubé D,Evans A,Hastings P,Kaiser H,Kohn D,Sarwer-Foner B

更新日期：1988-01-01 00:00:00

abstract：:The effects of density on growth and development of Scaphiopus couchi tadpoles in desert ponds were investigated, and sources of mortality over a three-year period were documented. In 16 of the 82 ponds monitored, predation was the principal cause of death, demonstrating that tadpoles in desert ponds may be exposed to...

journal_title：Oecologia

authors： Newman RA

更新日期：1987-01-01 00:00:00

abstract：:We obtined data on body mass and growth rates for the immature members of two groups of wild baboons in Amboseli National Park, Kenya. Data were collected without feeding, trapping, or handling. The data were separated into cross-sectional and longitudinal components, allowing both the examination of body mass-age rel...

journal_title：Oecologia

authors： Altmann J,Alberts S

更新日期：1987-04-01 00:00:00

abstract：:Investigating how prey density influences a prey's combined predation risk from multiple predator species is critical for understanding the widespread importance of multiple predator effects. We conducted experiments that crossed six treatments consisting of zero, one, or two predator species (hellgrammites, greenside...

journal_title：Oecologia

authors： Vance-Chalcraft HD,Soluk DA

更新日期：2005-07-01 00:00:00

abstract：:Recently, community ecology has emphasized the multi-facetted aspects of biological diversity by linking species traits and the environment. Here, we explored environmental correlates of taxonomically-based and traits-based compositional distances using a comprehensive data set of diatom and macroinvertebrate communit...

journal_title：Oecologia

authors： Perez Rocha M,Bini LM,Grönroos M,Hjort J,Lindholm M,Karjalainen SM,Tolonen KE,Heino J

更新日期：2019-12-01 00:00:00

abstract：:Disturbances such as fire, grazing, and soil mixing by animals interact to shape vegetation in grassland ecosystems. Animal-generated disturbances are unique in that they arise from a suite of behaviors that are themselves subject to modification by external factors. The manner in which co-occurring animal taxa intera...

journal_title：Oecologia

authors： Alba-Lynn C,Detling JK

更新日期：2008-08-01 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

authors： Striebel M,Schabhüttl S,Hodapp D,Hingsamer P,Hillebrand H

更新日期：2016-11-01 00:00:00

abstract：:Hemiparasitic plants tend to thrive in and significantly affect plant communities in low-nutrient, high-light environments. Hemiparasites are assumed to be weak competitors for light but strong parasites, leading to the prediction that effects on hosts and communities should be a function of resource supply. We invest...

journal_title：Oecologia

authors： Borowicz VA,Armstrong JE

更新日期：2012-07-01 00:00:00

abstract：:We investigated the carbon supply status in species-rich mediterranean plant communities growing in a bowl-shaped 1-ha "CO2 spring" area near Sienna, Italy. A geothermic "lime-kiln" has provided these communities, for as long as historical records are available, with pure CO2 that mixes with ambient air at canopy leve...

journal_title：Oecologia

authors： Körner C,Miglietta F

更新日期：1994-09-01 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

authors： Bernal JS,Luck RF,Morse JG

更新日期：1998-10-01 00:00:00

abstract：:1. The uptake of heavy metals via the alimentary tract can be an important factor for the metal budget of fish. 2. Concepts such as biomagnification, bioaccumulation, biotransference, or concentration factors, convey little information about the real threat originating from heavy metals in an aquatic food chain. 3. In...

journal_title：Oecologia

authors： Dallinger R,Prosi F,Segner H,Back H

更新日期：1987-08-01 00:00:00

abstract：:Carbon isotope ratios, photosynthesis, and transpiration were measured on a xylem-tapping mistletoe (Phoradendron juniperinum) and its host (Juniperus osteosperma) in southern Utah, USA. For host tissues, the carbon isotope ratios agreed with theoretical values predicted from gas exchange observations. However, for mi...

journal_title：Oecologia

authors： Marshall JD,Ehleringer JR

更新日期：1990-09-01 00:00:00

abstract：:Plant invasions can have substantial consequences for the soil ecosystem, altering microbial community structure and nutrient cycling. However, relatively little is known about what drives these changes, making it difficult to predict the effects of future invasions. In addition, because most studies compare soils fro...

journal_title：Oecologia

authors： Elgersma KJ,Ehrenfeld JG,Yu S,Vor T

更新日期：2011-11-01 00:00:00

abstract：:Ecologically isolated habitats (e.g., oceanic islands) favor the appearance of small assemblages of pollinators, generally characterized by highly contrasted life modes (e.g., birds, lizards), and opportunistic nectar-feeding behavior. Different life modes should promote a low functional equivalence among pollinators,...

journal_title：Oecologia

authors： Rodríguez-Rodríguez MC,Jordano P,Valido A

更新日期：2013-09-01 00:00:00

abstract：:Intra-colony demography and life history characteristics of neotropical Africanized and temperate European honey bearaces were compared under simulated feral conditions. Major differences in colony demography were found which nevertheless resulted in some similar reproductive characteristics. European colonies were la...

journal_title：Oecologia

authors： Winston ML,Dropkin JA,Taylor OR

更新日期：1981-03-01 00:00:00

abstract：:Population dynamics of attached algae in a eutrophic farmland stream (Wellow Brook, England) were correlated through multiple regression analyses with changes in 7 physico-chemical parameters (temperature, light, water velocity, pH, NO3-N, P2O5-P, SiO2-Si). Samples were taken every 2 weeks for 25 consecutive months be...

journal_title：Oecologia

authors： Moore JW

更新日期：1977-09-01 00:00:00

abstract：:Understanding climatic controls on tropical forest productivity is key to developing more reliable models for predicting how tropical biomes may respond to climate change. Currently there is no consensus on which factors control seasonal changes in tropical forest tree growth. This study reports the first comprehensiv...

journal_title：Oecologia

authors： Rowland L,Malhi Y,Silva-Espejo JE,Farfán-Amézquita F,Halladay K,Doughty CE,Meir P,Phillips OL

更新日期：2014-01-01 00:00:00

abstract：:The concept of trade-offs between reproduction and other fitness traits is a fundamental principle of life history theory. For many plant species, the cost of sexual reproduction affects vegetative growth in years of high seed production through the allocation of resources to reproduction at different hierarchical lev...

journal_title：Oecologia

authors： Sánchez-Humanes B,Sork VL,Espelta JM

更新日期：2011-05-01 00:00:00

abstract：:Physiological responses to elevated CO2 at the leaf and canopy-level were studied in an intact pine (Pinus taeda) forest ecosystem exposed to elevated CO2 using a free-air CO2 enrichment (FACE) technique. Normalized canopy water-use of trees exposed to elevated CO2 over an 8-day exposure period was similar to that of ...

journal_title：Oecologia

authors： Ellsworth DS,Oren R,Huang C,Phillips N,Hendrey GR

更新日期：1995-10-01 00:00:00

abstract：:European data from 15 long-term censuses of breeding land bird communities were analysed in order to measure community stability. Stability was here operationally defined as year-to-year persistence of community structure (total density, number of species, diversity, evenness of the species-abundance distribution, spe...

journal_title：Oecologia

authors： Järvinen O

更新日期：1979-01-01 00:00:00

abstract：:We report the recovery of root nodules from P. glandulosa var. glandulosa in the eastern portion of its range, where the species reaches its greatest vegetational development. Single cores 4.7 cm in diameter and up to 250 cm deep yielded from 0 to over 250 nodules. Nodules were found at all depths below 10 cm, with th...

journal_title：Oecologia

authors： Johnson HB,Mayeux HS Jr

更新日期：1990-09-01 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

authors： Black R,Peterson CH

更新日期：1987-09-01 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

authors： Lederhouse RC,Finke MD,Scriber JM

更新日期：1982-06-01 00:00:00

abstract：:The up-regulation of secondary metabolic pathways following herbivore attack and the subsequent reduction in herbivore performance have been identified in numerous woody plant species. Eucalypts constitutively express many secondary metabolites in the leaves, including terpenes and formylated phloroglucinol compounds ...

journal_title：Oecologia

authors： Henery ML,Wallis IR,Stone C,Foley WJ

更新日期：2008-07-01 00:00:00

abstract：:A stage-by-stage protocol for identifying simple or biased lottery, or non-lottery, patterns of seedling recruitment is outlined. For a simple (weighted) lottery to apply, the proportion of total individuals accounted for by one species at one stage of recruitment plotted against the proportion accounted for at a prev...

journal_title：Oecologia

authors： Lamont BB,Witkowski ET

更新日期：1995-03-01 00:00:00

abstract：:Despite many studies highlighting the widespread occurrence and effects of resource movement between ecosystems, comparatively little is known about how anthropogenic alterations to ecosystems affect the strength, direction and importance of such fluxes. Hydrological regime and riparian land use cause well-documented ...

journal_title：Oecologia

authors： Greenwood MJ,Booker DJ

更新日期：2016-02-01 00:00:00

abstract：:Ectomycorrhizal (EM) fungi form relationships with higher plants; plants transfer C to fungi, and fungi transfer nutrients to their host. While evidence indicates that this interaction is largely mutualistic, less is known about how nutrient supply and EM associates may alter C and nutrient exchanges, especially in in...

journal_title：Oecologia

authors： Albarracín MV,Six J,Houlton BZ,Bledsoe CS

更新日期：2013-12-01 00:00:00

abstract：:Aspects of the demography of Monhystera disjuncta were investigated at different temperatures (in agnotobiotic cultures) and in different feeding conditions (monoxenic cultures with different bacterial strains, and different densities in the feeding suspension with one strain). Embryonic development time, minimum gene...

journal_title：Oecologia

authors： Vranken G,Herman PM,Heip C

更新日期：1988-11-01 00:00:00