Results 91 to 100 of about 187,115 (300)

A comparison of presettlement and modern forest composition along an elevation gradient in central New Hampshire [PDF]

open access: yes, 2011
Tree species composition is influenced not only by edaphic and climatic factors but also by natural and human-caused disturbances. To understand interactions among these influences, we compared forest species composition data from the time of European ...
Cogbill, Charles V.   +3 more
core   +3 more sources

Why HR Has Failed to Address Healthcare's Workforce Crisis: The Need for a Systems Partner Role

open access: yesHuman Resource Management Journal, EarlyView.
ABSTRACT Attempts to remedy sustained workforce challenges facing healthcare organizations globally have been largely ineffective, despite increased political attention. In this paper we draw on contextually based human resource theory to explain why these challenges remain intractable.
Aoife M. McDermott   +2 more
wiley   +1 more source

Climate Change Impairs Nitrogen Cycling in European Beech Forests.

open access: yesPLoS ONE, 2016
European beech forests growing on marginal calcareous soils have been proposed to be vulnerable to decreased soil water availability. This could result in a large-scale loss of ecological services and economical value in a changing climate.
Michael Dannenmann   +13 more
doaj   +1 more source

Tests for attraction to prey and predator avoidance by chemical cues in spiders of the beech forest floor [PDF]

open access: yes, 2012
Spiders leave draglines, faeces and other secretions behind when traveling through their microhabitat. The presence of these secretions may unintentionally inform other animals, prey as well as predators, about a recent and possible current predation ...
Toft, Søren   +2 more
core   +2 more sources

Warm Spring Weather Alters Calling Phenology of Four Sympatric Early‐Breeding Anurans

open access: yesIntegrative Zoology, EarlyView.
An unusually warm March in 2024 (“false spring”) followed by freezing temperatures allowed us to assess the impact of a weather event on an amphibian community. The calling activity of all four species was associated with increasing temperature, and the first date of calling was advanced by 11–18 days.
Jeffrey P. Ethier   +3 more
wiley   +1 more source

Network Structure and the Efficiency Gains from Mergers: Evidence from U.S. Freight Railroads

open access: yesThe RAND Journal of Economics, EarlyView.
ABSTRACT The trade‐off between market power and efficiency gains is central to antitrust analyses of mergers, but empirical evidence quantifying efficiencies remains limited. Using transaction‐level data from U.S. freight railroads (1985–2005), this article quantifies merger‐induced cost efficiencies, driven mainly by eliminating inter‐railroad ...
Yanyou Chen
wiley   +1 more source

Conspecific negative density dependence in American beech

open access: yesForest Ecosystems, 2017
Background One of the most important drivers of forest biodiversity is conspecific negative density dependence (CNDD), a reduction in performance when conspecific densities are high.
Benjamin S. Ramage, Isabel J. Mangana
doaj   +1 more source

Volatile organic compounds emitted from fungal-rotting beech (Fagus sylvatica) [PDF]

open access: yes, 2008
Chemo-communication is an important mode of interaction within ecosystem. The living organism in the ecosystem can deliver signals to conspecifics, to co-organisms, and unintentionally to their enemies, by emitting the volatile organic compounds (VOCs ...
Schütz, Stefan   +2 more
core  

Uncovering temporal patterns of wildlife activity, habitat use and habitat preference from camera‐trap data

open access: yesMethods in Ecology and Evolution, EarlyView.
Abstract An understanding of habitat use and levels of active behaviour is foundational to wildlife behaviour, ecology, conservation and management. These variables are commonly measured by tracking individuals in space and time using biologging. In principle, camera‐trap data also contain information about both activity level and habitat use; however,
J. Marcus Rowcliffe   +2 more
wiley   +1 more source

Some effective environmental factors on beech scale (Cryptococcus fagisuga lindinger) density on oriental beech (Fagus orientalis lipsky) (Case study: Kheyrud Forest) [PDF]

open access: yesمجله جنگل ایران, 2017
In order to study the beech scale and some of the effective environmental factors on beech scale density on eastern beech trees, after field inspection, 10 hectare of infected beech stands were specified in low-, mid- and high lands of Kheyrud forest. At
faezeh firouzeh   +5 more
doaj  

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