Results 101 to 110 of about 1,657,469 (353)

New Data on Armadillos (Xenarthra: Dasypodidae) for Central Patagonia, Argentina [PDF]

open access: yes, 2010
Armadillos represent the most diverse family of xenarthrans. Although many studies have been done on these mammals, several topics, such as their local distribution, natural history, behavioral ecology and conservation, remain poorly known ...
Abba, Agustin Manuel   +2 more
core   +2 more sources

Corticular photosynthesis: A mechanism to enhance shrub expansion in coastal environments

open access: yesPhotosynthetica, 2009
Myrica cerifera L. (Myricaceae), the dominant woody species on many barrier islands along the southeastern coast of the United States, is expanding into grass-dominated, mesic, interdunal depressions where it forms dense thickets. Expansion may be attributed to a symbiotic nitrogen fixation with the bacterium Frankia, an evergreen leaf habit and ...
J.K. Vick, D. R. Young
openaire   +1 more source

Re‐thinking teachers' professional development: An analysis of National Professional Qualifications for school leaders in England

open access: yesBritish Educational Research Journal, EarlyView.
Abstract This article considers how teachers' professional development could be redeveloped to help address the current crisis in teacher recruitment and retention by offering greater intellectual rigour and more opportunities for intellectual growth. Our analysis is focused on the UK government's current policy for leadership development in schools in
Mark Innes   +2 more
wiley   +1 more source

Green-Down Protocol [PDF]

open access: yes, 2003
The purpose of this resource is to observe plant green-down and report greendown data to help validate estimates of the end of the plant growing season. Students monitor the change in color of selected leaves of trees, shrubs or grasses.
The GLOBE Program, University Corporation for Atmospheric Research (UCAR)
core  

Phylogenomics and Biogeography of the Eastern Asian–Eastern North American Disjunct Genus Hylodesmum (Fabaceae)

open access: yesBiological Diversity, EarlyView.
Integrating data from plastid genomes, nrDNA, and 353 low‐copy nuclear genes, this study establishes a robust phylogenetic framework for Hylodesmum. This framework supports a taxonomic revision recognizing 18 species and reveals a complex pattern of bidirectional EA–ENA dispersal, with mammals as a plausible dispersal agent. ABSTRACT Phylogenomics with
Zhuqiu Song   +5 more
wiley   +1 more source

Regional and landscape-scale variability of Landsat-observed vegetation dynamics in northwest Siberian tundra

open access: yesEnvironmental Research Letters, 2014
Widespread increases in Arctic tundra productivity have been documented for decades using coarse-scale satellite observations, but finer-scale observations indicate that changes have been very uneven, with a high degree of landscape- and regional-scale ...
Gerald V Frost   +2 more
doaj   +1 more source

A review of the historic and present ecological role of aquatic and shoreline wood, from forest to deep sea

open access: yesBiological Reviews, EarlyView.
ABSTRACT The ecology of forests, their losses, and terrestrial wood decomposition dynamics have been intensively studied and reviewed. In the aquatic realm, reviews have concentrated on large wood (LW) in rivers and the transition from freshwater to marine environments in the Pacific Northwest of North America. However, a comprehensive global synthesis
Jon Dickson   +9 more
wiley   +1 more source

Rapid and extensive expansion of shrub encroachment into grassland in Xilin Gol League, China, and its driving forces

open access: yesInternational Journal of Applied Earth Observations and Geoinformation
Shrub encroaching on grasslands threatens grassland ecosystems and negatively affects human land use and livelihood. However, existing research on this subject is limited, having focused on small areas, thus hindering a comprehensive understanding of the
Xiaoqing Lv   +6 more
doaj   +1 more source

Recent dynamics of arctic and sub-arctic vegetation

open access: yesEnvironmental Research Letters, 2013
We present a focus issue of Environmental Research Letters on the ‘Recent dynamics of arctic and sub-arctic vegetation’. The focus issue includes three perspective articles (Verbyla 2011 Environ. Res. Lett. 6 041003, Williams et al 2011 Environ.
Howard E Epstein   +2 more
doaj   +1 more source

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