Results 51 to 60 of about 2,175 (175)

A twofold development and demise of pine stands in the Netherlands during the Allerød interstadial: two hypotheses to explain a link to climate change recorded in Greenland ice

Journal of Quaternary Science, Volume 41, Issue 4, Page 575-586, May 2026.
ABSTRACT The second half of the Allerød interstadial in the Netherlands is characterised by pine forest. Excavated trunks of 165 pine trees at Leusden‐Den Treek in the central Netherlands (LETR16) were dated by dendrochronology and radiocarbon. Two chronologically separated pine forest phases occurred during relatively warm periods as recorded in ...
Wim Z. Hoek, Jos Bazelmans, Otto Brinkkemper, Petra Doeve, Bas van Geel   +4 more
wiley   +1 more source

A 13,000‐Year Record of the Southern Hemisphere Westerlies Inferred From Pollen and Plant Wax Isotopes From the South Atlantic

Paleoceanography and Paleoclimatology, Volume 41, Issue 5, May 2026.
Abstract We compare a new pollen record with pre‐existing plant‐wax isotope data from lacustrine sediments retrieved from Mt. Usborne, East Falkland. These records document variations in plant productivity, wind intensity, and moisture availability, to measure the influence of the Southern Hemisphere Westerlies (SHW) over the last 13,000 years.
M. Spoth‐Ascencao, B. Hall, J. L. Gill, A. Diefendorf, T. Lowell, J. Russell, M. Corcoran, P. Brickle   +7 more
wiley   +1 more source

Alkaloids from

Natural Product Communications, 2015
One new lycopodine-type Lycopodium alkaloid, dehydroisofawcettiine N -oxide (1) and eleven known analogues (2–12) were isolated from the whole plant of Diphasiastrum complanatum .
Yu Tang, Juan Xiong, Jin-Feng Hu
doaj   +1 more source

The Role of Forage Quantity and Quality in the Migration and Diet of a Northern Ungulate During Their Neonatal Period

Ecology and Evolution, Volume 16, Issue 4, April 2026.
In this article, we examined the differences in forage quantity and quality between two defined ranges of a wood bison population as an attempt to identify possible factors influencing their migration during the neonatal period. We found significant differences in the forage quantity and quality between ranges, suggesting a link between these factors ...
Sebastian Buitrago Gutierrez, Lee J. Hecker, Edward W. Bork, Mark A. Edwards, Scott E. Nielsen   +4 more
wiley   +1 more source

Diterpenoid Diversity across Land Plants

Helvetica Chimica Acta, Volume 109, Issue 4, April 2026.
Here we bridge the knowledge of diterpene chemical diversity, biosynthesis, and evolution from nonvascular mosses and liverworts to that known from vascular plants. ABSTRACT The diverse array of diterpenoid natural products stems from the ease of manipulating the promiscuity of diterpene cyclases.
Anita Berg, Chad K. Papenfuhs, Amy E. Fraley   +2 more
wiley   +1 more source

PTERIDÓFITOS DE COLOMBIA I. COMPOSICIÓN Y DISTRIBUCIÓN DE LAS LYCOPODIACEAE

Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales
La familia Lycopodiaceae en Colombia está representada por tres géneros y 55 especies. Huperzia es el más diverso con 42 especies. mientras que Lycopodiella y Lycopodium poseen 9 y 4 respectivamente.
María Teresa Murillo-Pulido, José Murillo-Aldana   +1 more
doaj   +1 more source

Lycopodiaceae in Brazil. Conspectus of the family I. The genera Lycopodium, Austrolycopodium, Diphasium, and Diphasiastrum

Rodriguésia
A conspectus of the Lycopodiaceae in Brazil is presented, following a generic classification based on anatomy, chromosome numbers, spores and gametophytes, as well as recent molecular studies.
Benjamin Øllgaard, Paulo G. Windisch
doaj   +1 more source

Anti-Cholinesterase Activity of Lycopodium Alkaloids from Vietnamese Huperzia squarrosa (Forst.) Trevis

Molecules, 2014
A series of Lycopodium alkaloids, namely lycosquarosine A (1), acetylaposerratinine (2), huperzine A (3), huperzine B (4), 8α-hydrophlemariurine B (5), and huperzinine (6), has been isolated from Vietnamese Huperzia squarrosa.
Nguyen Ngoc Chuong, Nguyen Thi Thu Huong, Tran Manh Hung, Tran Cong Luan   +3 more
doaj   +1 more source

Sobre la Pteridofita argentino-chilena "?Lycopodium confertum?"

Lilloa, 1945
El autor estudia las razones de la confusión que existe en la determinación de la especie Lycopodium confertum Willd. y L. magellanicum Sw., analizando las opiniones publicadas por varios autores que han estudiado el ?licopodius?.
Gualterio Looser
doaj  

Lycopodiaceae no Parque Nacional do Itatiaia, RJ e MG, Brasil Lycopodiaceae of Itatiaia National Park, Rio de Janeiro and Minas Gerais states, Brazil

Acta Botânica Brasílica, 2010
O Parque Nacional do Itatiaia localiza-se na região Sudeste do Brasil, nos limites dos estados do Rio de Janeiro e Minas Gerais, com altitudes que variam de 390 a 2789 m (Pico das Agulhas Negras).
Carla Gabriela Vargas Ramos, Lana da Silva Sylvestre   +1 more
doaj   +1 more source