Results 151 to 160 of about 21,663 (308)

Early evolutionary history of the seed

open access: yesBiological Reviews, EarlyView.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman   +2 more
wiley   +1 more source

Time requirements of pre-acclimatization at simulated altitude to prevent acute mountain sickness. [PDF]

open access: yesJ Travel Med
Burtscher J   +8 more
europepmc   +1 more source

Building an Ethical Small Group (Chapter 9 of Meeting the Ethical Challenges of Leadership)

open access: yes, 2018
This chapter examines ethical leadership in the small-group context. To help create groups that brighten rather than darken the lives of participants, leaders must foster individual ethical accountability among group members, ensure ethical group ...
Johnson, Craig E
core  

Geological processes shaping freshwater biodiversity: a synthesis of global evidence

open access: yesBiological Reviews, EarlyView.
ABSTRACT Recent genomic data highlight the key roles of geological processes in shaping the diversification and biogeography of freshwater lineages. Specifically, physical processes such as tectonic uplift, erosion, glaciation, lake formation, and sea‐level fluctuation contribute extensively to the evolution of biotic diversity within and among ...
Jonathan M. Waters   +3 more
wiley   +1 more source

Subterranean environments contribute to three‐quarters of classified ecosystem services

open access: yesBiological Reviews, EarlyView.
ABSTRACT Beneath the Earth's surface lies a network of interconnected caves, voids, and systems of fissures forming in rocks of sedimentary, igneous, or metamorphic origin. Although largely inaccessible to humans, this hidden realm supports and regulates services critical to ecological health and human well‐being.
Stefano Mammola   +30 more
wiley   +1 more source

Injury fear in mountaineering accidents: a study of Turkish mountaineers' experiences. [PDF]

open access: yesBMC Sports Sci Med Rehabil
Ekinci E   +5 more
europepmc   +1 more source

Waiting for 2005?s World Skiing Championship: an Experimental Assessment of Tourism Sustainability in Sondrio Province [PDF]

open access: yes
The tourism sector is more and more regarded as a central element of territorial development in many countries. According to the sustainable development approach we have to look at tourism from two possible points of view.
Giulia Pesaro
core  

Spatial metrics in fire ecology: seeking consistency amidst complexity

open access: yesBiological Reviews, EarlyView.
ABSTRACT Technological advances, including remote sensing, have led to a proliferation of metrics used in ecological studies to examine spatial patterns of fire regimes and their ecological effects. Researchers can use many different metrics to analyse spatial variation in both fire events and resulting fire regimes, including fire size, shape ...
Alexander R. Carey   +5 more
wiley   +1 more source

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