Results 11 to 20 of about 1,660 (170)

Transition from Fire-Dependent Open Forests: Alternative Ecosystem States in the Southeastern United States

open access: yesDiversity, 2021
Land use and fire exclusion have influenced ecosystems worldwide, resulting in alternative ecosystem states. Here, I provide two examples from the southeastern United States of fire-dependent open pine and pine-oak forest loss and examine dynamics of the
Brice B. Hanberry
doaj   +1 more source

Pinus mugo shrubs on peat bogs in the Tatra National Park

open access: yesPlant and Fungal Systematics, 2021
Pinus mugo shrubs on peat bogs in the Tatra National Park (TNP) were for the first time described as a separated plant association by Obidowicz (1975) from only two mires.
Anna Maria Ociepa   +2 more
doaj   +1 more source

Relative resistance to breaking of Pinus taeda and Pinus palustris [PDF]

open access: yesForestry: An International Journal of Forest Research, 2018
AbstractPatterns from hurricane damage indicate that longleaf pine is more windfirm than loblolly pine. Tree windfirmess has been attributed to many factors including species and material properties like wood strength and stiffness. Because longleaf pine wood is stronger and stiffer than loblolly pine wood, this study used static winching methodology ...
Thomas J Dean, Cory Garms
openaire   +1 more source

Growth Inhibition and Apoptotic Effect of Pine Extract and Abietic Acid on MCF-7 Breast Cancer Cells via Alteration of Multiple Gene Expressions Using In Vitro Approach

open access: yesMolecules, 2022
In vitro anti-proliferative activity of Pinus palustris extract and its purified abietic acid was assessed against different human cancer cell lines (HepG-2, MCF-7 and HCT-116) compared to normal WI-38 cell line.
Hesham Haffez   +3 more
doaj   +1 more source

Economics of Southern Pines With and Without Payments for Environmental Amenities in the US South

open access: yesFrontiers in Forests and Global Change, 2021
During the early 1900s, nearly 37 million hectares of land in the Southern United States were under longleaf pine (Pinus palustris) relative to the current area of 1.6 million hectares.
Karuna Paudel, Puneet Dwivedi
doaj   +1 more source

Phytochrome in Embryos of Pinus palustris [PDF]

open access: yesPlant Physiology, 1969
Phytochrome has been shown to be involved in the germination of seeds of a number of pine species as determined by the responses of these seeds to red and far-red irradiations (4, 7, 9). Nyman ,(7) found that even before imibibition, germination of Pinus silvestris seeds can be promoted by red irradiation.
E M, Tobin, W R, Briggs
openaire   +2 more sources

Current Protections and Future Threats to Say's Spiketail Habitat in the Southeastern USA. [PDF]

open access: yesEcol Evol
Dragonflies and damselflies are important indicators of ecological integrity and environmental quality but remain underrepresented in conservation efforts, in part due to a lack of quantitative information regarding their habitat requirements. Species distribution models (SDMs) can facilitate conservation planning by allowing researchers to estimate ...
Flenniken JM, Barrett MA, Stevenson DJ.
europepmc   +2 more sources

MORTALIDADE EM FLORESTAS DE Pinus palustris CAUSADA POR TEMPESTADE DE RAIOS [PDF]

open access: yesFloresta e Ambiente, 2023
RESUMO A importância dos raios como fonte de ignição em floresta no ecossistema de Pinus palustris é bem conhecida no sul dos Estados Unidos. Os raios também impactam este sistema em pequena escala, causando a morte de árvores individualmente. O objetivo
Kenneth W. Outcalt   +2 more
doaj  

Accumulation of antimony and lead in leaves and needles of trees: The role of traffic emissions

open access: yesHeliyon, 2023
Antimony (Sb) is a toxic metalloid, which has been increasingly used in the brake lining of vehicles, and increased concentrations have been found in soils near abundant traffic.
Håkan Pleijel   +4 more
doaj   +1 more source

Hydraulic architecture and tracheid allometry in mature Pinus palustris and Pinus elliottii trees [PDF]

open access: yesTree Physiology, 2010
Pinus palustris Mill. (longleaf pine, LL) and Pinus elliottii Engelm. var. elliottii (slash pine, SL) frequently co-occur in lower coastal plain flatwoods of the USA, with LL typically inhabiting slightly higher and better-drained microsites than SL.
C A, Gonzalez-Benecke   +2 more
openaire   +2 more sources

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