Results 31 to 40 of about 971,459 (303)

Environmental Kuznets Curves for CO2: Heterogeneity versus Homogeneity [PDF]

open access: yesSSRN Electronic Journal, 2005
We explore the emissions income relationship for CO2 in OECD countries using various modelling strategies.Even for this relatively homogeneous sample, we find that the inverted-U-shaped curve is quite sensitive to the degree of heterogeneity included in the panel estimations.This finding is robust, not only across different model specifications but ...
Vollebergh, H.R.J.   +2 more
openaire   +4 more sources

Clonality drives structural patterns and shapes the community assemblage of the Mediterranean Fagus sylvatica subalpine belt

open access: yesFrontiers in Plant Science, 2022
Past anthropogenic disturbances lowered the altitudinal distribution of the Mediterranean Fagus sylvatica forests below 2,000 m a.s.l. Accordingly, our current understanding of the southern distribution range of F.
Luigi Saulino   +10 more
doaj   +1 more source

Environmental Impact Evaluation for Heterogeneously Catalysed Starch Oxidation [PDF]

open access: yesChemistryOpen, 2022
AbstractOxidised starch is currently produced from native starch using sodium hypochlorite as an oxidising agent. The use of hypochlorite has undesired side reactions and produces stoichiometric amounts of waste (salt), thus alternative oxidation methods are desired.
Hoogstad, Tim M.   +5 more
openaire   +4 more sources

Does Environmental Heterogeneity Promote Cognitive Abilities? [PDF]

open access: yesIntegrative and Comparative Biology, 2015
In the context of global change the possible loss of biodiversity has been identified as a major concern. Biodiversity could be seriously threatened as a direct consequence of changes in availability of food, changing thermal conditions, and loss and fragmentation of habitat.
González Gómez, Paulina L.   +3 more
openaire   +3 more sources

Canopy cover negatively affects arboreal ant species richness in a tropical open habitat

open access: yesBrazilian Journal of Biology
We tested the hypothesis of a negative relationship between vegetation characteristics and ant species richness in a Brazilian open vegetation habitat, called candeial.
A. C. M. Queiroz, C. R. Ribas
doaj   +1 more source

Simultaneous evolutionary expansion and constraint of genomic heterogeneity in multifocal lung cancer. [PDF]

open access: yes, 2017
Recent genomic analyses have revealed substantial tumor heterogeneity across various cancers. However, it remains unclear whether and how genomic heterogeneity is constrained during tumor evolution.
Bivona, Trever G   +16 more
core   +2 more sources

Are individual based models a suitable approach to estimate population vulnerability? - a case study [PDF]

open access: yesComputational Ecology and Software, 2011
European populations of the Large Blue Butterfly Maculinea arion have experienced severe declines in the last decades, especially in the northern part of the species range.
Eva Maria Griebeler
doaj  

Environmental Factors Override Dispersal-Related Factors in Shaping Diatom and Macroinvertebrate Communities Within Stream Networks in China

open access: yesFrontiers in Ecology and Evolution, 2020
Metacommunity theory provides a useful framework to describe the underlying factors (e.g., environmental and dispersal-related factors) influencing community structure.
Siwen He   +4 more
doaj   +1 more source

Genetic structure and evolutionary history of three alpine sclerophyllous oaks in East Himalaya-Hengduan Mountains and adjacent regions

open access: yesFrontiers in Plant Science, 2016
The East Himalaya-Hengduan Mountains (EH-HM) region has a high biodiversity and harbours numerous endemic alpine plants. This is probably the result of combined orographic and climate oscillations occurring since late Tertiary.
Li Feng   +6 more
doaj   +1 more source

Modelling Spatial Regimes in Farms Technologies [PDF]

open access: yes, 2017
We exploit the information derived from geographical coordinates to endogenously identify spatial regimes in technologies that are the result of a variety of complex, dynamic interactions among site-specific environmental variables and farmer decision ...
Benedetti, Roberto   +2 more
core   +3 more sources

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