Results 71 to 80 of about 20,074 (265)

Overgrazing‐Induced Root Carbohydrate Depletion During Winter Dormancy Drives the Decline of Stipa purpurea Populations in the Tibetan Alpine Steppe

open access: yesLand Degradation &Development, EarlyView.
ABSTRACT Plant carbon allocation and physiology are influenced by overgrazing during the growth period. However, the response of plant physiological processes to overgrazing during winter dormancy remains unclear. We analyzed root physiological processes of Stipa purpurea in winter dormancy across three plots: over grazing (FG), exclusions of 2 years ...
Jianbo Wu   +3 more
wiley   +1 more source

As Guerras Justas e a escravidão indígena em Minas Gerais nos séculos XVIII e XIX The "Fair Wars" and the indigenous slavery in Minas Gerais in the XVIII and XIX centuries

open access: yesVaria História, 2006
Este artigo busca analisar as diferentes imagens que foram criadas sobre os índios em Minas Gerais demonstrando que, na maioria das vezes, determinados grupamentos indígenas foram associados às feras.
Marcia Amantino
doaj   +1 more source

A novel approach to estimate non‐algal particle absorption for improved retrieval of pigment concentrations in coastal waters

open access: yesLimnology and Oceanography: Methods, EarlyView.
Abstract Phytoplankton play a central role in ocean biogeochemistry and understanding their composition and variability is critical for monitoring marine ecosystem dynamics. Continuous spectrophotometric measurements (using a Seabird Sci. AC‐S) along ship tracks enable high‐resolution measurements of particle spectral absorption (apλ$$ {a}_p\left ...
Margherita Costanzo   +4 more
wiley   +1 more source

Petrocosmea wentsaii sp. nov. (Gesneriaceae) from Guizhou, China

open access: yesNordic Journal of Botany, EarlyView.
Petrocosmea wentsaii M.Q. Han, Miao.M. Wang & Yan Liu, a new species from Guizhou, China, is described and illustrated. Petrocosmea wentsaii was found on damp walls in a huge limestone cave. It is most similar to Petrocosmea hexiensis S.Z. Zhang & Z.Y. Liu in the conformation of the corolla.
Miao‐Miao Wang   +3 more
wiley   +1 more source

Contribution of V.A. Rusanov to the Study of Geology and Geography of the Novaya Zemlya Archipelago (On the 150th Anniversary of His Birth)

open access: yesАрктика и Север
This paper describes V.A. Rusanov’s expeditions to Novaya Zemlya in 1907–1912. The objectives of the expeditions included studying the coastline, the Northern Sea Route, searching for minerals, and ex-ploring the possibility of organizing fishing.
Irina S. Astakhova
doaj   +1 more source

Pteris madhusoodananii (Pteridaceae), a new fern species from India

open access: yesNordic Journal of Botany, EarlyView.
Pteris madhusoodananii sp. nov. (Pteridaceae), from the Kolli hills of Eastern Ghats, India, is described. The new taxon is morphologically distinct, characterized by a unique lamina texture and coloration, specific pinna‐pinnule architecture and distinct spore micromorphology.
Kalathil Sethumadhavan Abhilash   +6 more
wiley   +1 more source

Anidamientoydieta de Harpia harpyja Linnaeus en la Comunidad Nativa de Infierno, Madre de Dios, Perú

open access: yesRevista Peruana de Biología, 2013
El Águila Arpía (Harpia harpyja Linnaeus) es la rapaz de mayor tamaño que habita los bosques amazónicos, sin embargo en el Perú, es muy poco lo que se sabe de esta especie.
Renzo P. Piana
doaj   +1 more source

Portulaca abscondita (Portulacaceae, Caryophyllales), a new microendemic species from Monte Azul, Minas Gerais, Brazil

open access: yesNordic Journal of Botany, EarlyView.
Portulaca (Portulacaceae) is a cosmopolitan genus with centers of diversity in Africa and South America. In Brazil, 22 species are recognized, most occurring in xerophytic environments of the Cerrado, particularly in Campos Rupestres. These rocky montane habitats, especially in northern Minas Gerais state, remain undercollected despite their high ...
Danilo Alvarenga Zavatin   +7 more
wiley   +1 more source

Expedition Medicine [PDF]

open access: yesJournal of the Royal Army Medical Corps, 2005
E D, Nicol, S, Dhillon
openaire   +2 more sources

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