نتایج جستجو برای: relations within upland

تعداد نتایج: 1121178  

2013
M. J. Stewardson I. Marusic

Hydrological connections in streams occur longitudinally along the stream channel, laterally with the floodplain and vertically with the hyporheic zone. These connections are an important control on freshwater ecosystem processes at the basin-scale including nutrient cycling and retention; movements of organisms to complete life stages; and the provision of refugia during high and low flow peri...

Journal: :Journal of animal science 2013
C D Buckner T J Klopfenstein K M Rolfe W A Griffin M J Lamothe A K Watson J C MacDonald W H Schacht P Schroeder

Four experiments were conducted to evaluate RUP content and digestibility for smooth bromegrass, subirrigated meadow, upland native range, and warm-season grasses. Samples were collected from esophageally cannulated cows or ruminally cannulated steers. Forages were ruminally incubated in in situ bags for durations of time based on 75% of total mean retention time, which was based on IVDMD and r...

2008
A. Hope Jahren Monica C. Byrne Heather V. Graham Leonel S.L. Sternberg Roger E. Summons

Article history: The extensive vertical expo Received 21 February 2008 Received in revised form 12 September 2008 Accepted 16 September 2008 sure (N150 m) of terrestrial sediments on Axel Heiberg Island, which contain thick fossiliferous lignites, presents an exceptional opportunity to follow the establishment and reestablishment of ArcticMetasequoia forests during the middle Eocene. We compare...

2009
KATHARINE I. PREDICK SARAH E. GERGEL MONICA G. TURNER

Flood regime and vegetation flood tolerance interact to influence tree growth in riverine landscapes. We studied tree growth in floodplain and upland forests of theWisconsin River. About a century ago, levees set back from the river were constructed on this floodplain. The levee restricts some floodplain area from overbank flood events, but leaves a portion of active floodplain still inundated ...

2012
CATHRYN H. GREENBERG

Fleshy fruit is a key food resource for many vertebrates and may be particularly important energy source to birds during fall migration and winter. Hence, land managers should know how fruit availability varies among forest types, seasons, and years. We quantified fleshy fruit abundance monthly for 9 years (1995–2003) in 56 0.1-ha plots in 5 forest types of South Carolina’s upper Coastal Plain,...

2003
Sharon M.L. Ewe

Schinus terebinthifolius Raddi (Schinus) is an invasive exotic plant widely found in Florida and Hawaii. This species is found from the upland pinelands to the mangrove forests of Florida. Dense Schinus infestations have the capacity to displace native species, reduce species diversity and been shown to reduce faunal use of the community. The purpose of this study was to determine if gas exchan...

2006
Petteri Muukkonen Raisa Mäkipää Raija Laiho Kari Minkkinen Harri Vasander Leena Finér

In the present study, the aboveground biomass of the understorey vegetation of boreal coniferous forests was modelled according to the percentage cover. A total of 224 observations from 22 stands in upland forests and 195 observations from 14 different studies in peatland forests were utilized for the present analyses. The relationships between biomass and percentage cover can be used in ecosys...

2001
JOSEPH B. WILLIAMS

Most studies on similar coexisting species enumerate ecological differences which presumably reduce the demand for common resources and allow coexistence (MacArthur 1958, Root 1967, Stallcup 1968). As Schoener (1974) pointed out, however, these differences alone do not demonstrate the role of competition in structuring avian communities. Even if niches were arranged randomly with respect to one...

2001
K. A. HIBBARD S. ARCHER D. S. SCHIMEL D. W. VALENTINE

Ecosystem properties of surficial (0–10 cm) soils in remnant herbaceous patches were compared to those of contrasting woody plant patch types (upland discrete cluster, upland grove, and lowland woodland) where shifting land cover is known to have occurred over the past 50–77 yr. The purpose of this study was to evaluate and quantify the biogeochemical consequences and subsequent developmental r...

Journal: :Agronomy 2022

Reclaimed coastal areas were mostly used for agricultural purposes in the past, while land-use conversion was initiated recent decades eastern China. Elucidation of effects on soil properties and stoichiometry is essential addressing climate change ecological conservation. In this study, five types a reclaimed area chosen to compare differences stoichiometry, which comprised paddy, upland, upla...

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