Results 101 to 110 of about 43,153 (256)

Invasive annual grasses destabilize plant communities in a northern mixed‐grass prairie

open access: yesEcosphere
Temporal community stability, here defined as temporal mean divided by temporal SD, plays an important role in predicting certain ecosystem services.
Morgan D. T. Frost   +3 more
doaj   +1 more source

Effects of temporal variability on rare plant persistence in annual [PDF]

open access: yes, 2004
Traditional conservation biology regards environmental fluctuations as detrimental to persistence, reducing long-term average growth rates and increasing the probability of extinction.
Levine, J.M., Rees, M.
core  

Growth inhibitory effects of Clary Sage(Salvia sclarea L.) on some seed germination characteristics of Red Brome (Bromus tomentellusBoiss) [PDF]

open access: yesعلوم و فناوری بذر ایران, 2012
Allelopatic interactions between plants can affect different stages of their lives. In this study, allelopathic effects of Salvia sclarea uppers, underground parts and flower extracts, in a compeletly randomized design (CRD) with 4 replications was ...
ساره قمی, علی طویلی
doaj  

Bromegrass in Alaska. VI. Effects of a Broad Array of Harvest Schedules and Frequencies on Forage Yield and Quality and on Subsequent Winter Survival of Cultivars Manchar and Polar [PDF]

open access: yes, 1997
Objectives of this study were to compare several schedules and frequencies of forage harvest of smooth bromegrass (Bromus inermis Leyss.): (a) for distribution of forage yields and total productivity in the year of differential harvests, (b) for ...
Klebesadel, Leslie J.
core  

Seasonal Distribution of Forage Yield and Winter Hardiness of Grasses from Diverse Latitudinal Origins Harvested Four Times Per Year in Southcentral Alaska [PDF]

open access: yes, 1992
Relatively short growing seasons at subarctic latitudes require maximum efficiencies in production of forages during the brief growing period. This is necessary to provide adequately for livestock feeding requirements both during the growing season ...
Klebesadel, Leslie J.
core  

28 years of vegetation change (1978 – 2006) in a calcareous coastal dune system [PDF]

open access: yes, 2010
Changes in vegetation structure and composition over a 28 year period (1978–2006) following removal of human-induced disturbances, were examined in a calcareous coastal dune system in Point Nepean National Park (380 19’S, 1440 41’E) in south-eastern ...
Douglas, Imelda   +3 more
core  

Winterhardiness and Agronomic Performance of Wildryes (Elymus species) Compared With Other Grasses in Alaska, and Responses of Siberian Wildrye to Management Practices [PDF]

open access: yes, 1993
This report summarizes eight field experiments involving both native and introduced wildrye grasses (Elymus species) conducted over a span of several years at the University of Alaska’s Matanuska Research Farm (61.6oN) near Palmer in southcentral ...
Klebesadel, Leslie J.
core  

Use of AFLP and RAPD molecular genetic markers and cytogenetic analysis to explore relationships among taxa of the Patagonian Bromus setifolius complex

open access: yesGenetics and Molecular Biology, 2009
Bromus setifolius var. pictus (Hook) Skottsb., B. setifolius var. setifolius Presl. and B. setifolius var. brevifolius Ness are three native Patagonian taxa in the section Pnigma Dumort of the genus Bromus L.
Ana M. García   +7 more
doaj  

Landscape heterogeneity influences on sheep habits under extensive grazing management in Southern Patagonia [PDF]

open access: yes, 2015
In Southern Patagonia, continuous grazing with fixed stocking rates in large paddocks prevails over grazing systems subjected to regular evaluations and rotational rests.
Peri, Pablo Luis
core  

Mechanisms controlling the distribution of two invasive Bromus species

open access: yesFrontiers of Biogeography, 2014
In order to predict future range shifts for invasive species it is important to explore their ability to acclimate to the new environment and understand physiological and reproductive constraints controlling their distribution.
Olga Bykova
doaj  

Home - About - Disclaimer - Privacy