Results 131 to 140 of about 481,349 (388)

Grassland fire ecology has roots in the late Miocene

Proceedings of the National Academy of Sciences of the United States of America, 2018
Significance Fire is crucial to maintaining modern subtropical grasslands, yet the geologic and ecological history of this association is not well constrained.
A. Karp, A. Behrensmeyer, K. Freeman
semanticscholar   +1 more source

Phytochemical Investigation and Biological Evaluation of Disynaphia filifolia: A Novel Source of Tremetone in Asteraceae

Chemistry &Biodiversity, EarlyView.
ABSTRACT Chemical investigation of Disynaphia filifolia (Hassl.) R.M. King & H. Rob. (Asteraceae) led to the isolation of eight compounds, with tremetone being the major metabolite recovered. Tremetone has been suggested as the toxic compound in Ageratina altissima and Isocoma pluriflora, two species of the Asteraceae family. Although D.
Yasmin Rodrigues Chierici, Anderson Valdiney Gomes Ramos, Drielli Rhiane Peres Colhado Areas, Alana Carla Battistella, Solange Maria Cottica, Tatiana Shioji Tiuman, Helena Mannochio‐Russo, Ana Lucia Tasca Gois Ruiz, Mary Ann Foglio, Marta Regina Barrotto do Carmo, Maria Helena Sarragiotto, Debora Cristina Baldoqui   +11 more
wiley   +1 more source

Leaching of dissolved organic carbon (DOC) and nitrogen (DON) from grass-clover pastures after ploughing [PDF]

, 2004
In mixed arable grassland systems there can be a considerable build-up of nitrogen (N) caused by input through symbiotic N2 fixation and by the deposition from grazing animals.
Eriksen, J., Hansen, E.M., Vinther, F.P.
core  

Global fire history of grassland biomes

Ecology and Evolution, 2018
Grasslands are globally extensive; they exist in many different climates, at high and low elevations, on nutrient‐rich and nutrient‐poor soils. Grassland distributions today are closely linked to human activities, herbivores, and fire, but many have been
B. Leys, J. Marlon, C. Umbanhowar, B. Vannière   +3 more
semanticscholar   +1 more source

Exploring Chemical Variability in the Essential Oil of Artemisia absinthium L. in Relation to Different Phenological Stages and Geographical Location

Chemistry &Biodiversity, EarlyView.
ABSTRACT The plant essential oils (EOs) play a fundamental role in the adaptation to different habitats and environmental conditions. To verify the influence of these factors on the EO of Artemisia absinthium L., we conducted a pharmacognostic study on this species, collected during both the vegetative (V) and flowering (F) stages, in two different ...
Paola Malaspina, Flavio Polito, Andrea Mainetti, Sana Khedhri, Vincenzo De Feo, Laura Cornara   +5 more
wiley   +1 more source

Impact of low-input meadows on arthropod diversity at habitat and landscape level [PDF]

, 2005
In Switzerland, in order to preserve and enhance arthopod diversity in grassland ecosystems (among others), farmers had to convert at least 7 % of their land to ecological compensation areas – ECA. Major ECA are low input grassland, traditional orchards,
Jeanneret, Ph., Pfiffner, L:, Pozzi, S., Walter, Th.   +3 more
core  

Vegetation type and grazing intensity jointly shape grazing effects on grassland biodiversity

Ecology and Evolution, 2018
In the Palaearctic steppe zone, overgrazing was identified as one of the key drivers of declining grassland biodiversity, which underlines the necessity of the functional evaluation of increased grazing pressure on grassland vegetation.
P. Török, K. Penksza, E. Tóth, A. Kelemen, J. Sonkoly, B. Tóthmérész   +5 more
semanticscholar   +1 more source

Pulmonary development in Squamata: Insights from embryonic studies using micro‐CT

Developmental Dynamics, EarlyView.
Abstract Background Pulmonary development in tetrapods is a complex process, especially within squamates, where single‐chambered, transitional, and multi‐chambered lungs can be found in adult animals. While the embryological development of the respiratory system of lizards and snakes was studied in a number of species between the 1830s and 1940s, the ...
Barbara G. Champini, Raul E. Diaz Jr., Emma R. Schachner, Wilfried Klein   +3 more
wiley   +1 more source

Integrated transcriptome and proteome analyses reveal potential mechanisms in Stipa breviflora underlying adaptation to grazing

Grassland Research
Background Long‐term overgrazing has led to severe degradation of grasslands, posing a significant threat to the sustainable use of grassland resources.
Yanan Liu, Shixian Sun, Yanan Zhang, Miaomiao Song, Yunyun Tian, Peter J. Lockhart, Xin Zhang, Ying Xu, Zhenhua Dang   +8 more
doaj   +1 more source

The Grasses and Grasslands of South Africa [PDF]

, 1919

openalex   +1 more source