Results 91 to 100 of about 9,576 (247)

Functional morphology and biomechanics of the locomotor apparatus in the large Late Triassic carnivore Postosuchus kirkpatricki (Archosauria: Rauisuchidae)

Journal of Anatomy, EarlyView.
A three‐dimensional model is used to analyze the locomotor biomechanics of the large Late Triassic archosaurian reptile Postosuchus kirkpatricki. The study finds that it is more uncertain than previously concluded whether it was quadrupedal or bipedal, and plantigrade or digitigrade, but it clearly had locomotor specializations including large hindlimb
John R. Hutchinson, Emily Faughey, Matthew Humpage, Tristan Dupuis, Oliver E. Demuth, Romain Pintore, Francois Clarac   +6 more
wiley   +1 more source

Quaternary palaeoecology and ecological theory

, 2021
A review showing the potential contribution of Quaternary palaeoecology to the ecological theory, focused on the ecosystem evolutionary processes, is presented. By analyzing oceanic and continental Pleistocene and Holocene records, some reflections about
Rull del Castillo, Valentí
core  

A Holocene pollen record of savanna establishment in coastal Amapá

Anais da Academia Brasileira de Ciências, 2008
The main goal of this study was to investigate how climate and human activities may have influenced ecotonal areas of disjoint savannas within Brazilian Amazonia.
Mauro B. de Toledo, Mark B. Bush
doaj   +1 more source

Palaeoecological and palaeoclimatological implications of the Eocene Northern Hemisphere Azolla phenomenon

, 2010
The high abundances and cyclic distribution of remains of the freshwater fern Azolla in early middle Eocene sediments from the Arctic Ocean have previously been related to episodic surface water freshening, which was speculated to be orbitally modulated.
Sub Palaeoecology begr. 01-01-12, Palaeoecology, Barke, J., Biomarine Sciences   +3 more
core  

Nonequilibrium dynamics in models of human palaeoecology

, 2021
Palaeoecological modelling has become significantly more accessible to archaeologists in recent years. New open datasets—high resolution global climate and environmental surfaces (e.g.
Roe, Joe
core  

Mesozoic and Cenozoic palaeogeography, palaeoclimate and palaeoecology in theeastern Tethys [PDF]

, 2019
It is now more than 100years since Suess advanced the concept of the Tethys Ocean in 1893. Since the 1960s when the theory of plate tectonics became established, the Tethys region has attracted the attention of many geologists because it has experienced ...
Sha, Jingeng, Li, Jianguo, Sha, Jingeng,, Wang, Xiaoming,, Li, Jianguo,, McLoughlin, Stephen, Wang, Xiaoming, McLoughlin, Stephen,   +7 more
core   +1 more source

Digitizing collections to unlock the full potential of palynology: A case study with the Smithsonian palynology collection

PLANTS, PEOPLE, PLANET, Volume 8, Issue 4, Page 1116-1131, July 2026.
Large palynological collections have been built over decades and contain vital information. However, they are often difficult to access and use effectively. What is the point of having such collections if they are not fully utilizable? To solve this problem, we digitized the Smithsonian palynological collection using both light and confocal microscopy.
Carlos Jaramillo, Surangi W. Punyasena, Daurys de Alba, Roxana Alveo, Angelica Arcila, Jorge Bermudez, Jonatan Bustos, Dayenari Caballero‐Rodriguez, Karen Cardenas, David Caro, Francy Carvajal, Ivonne Marcela Castañeda, Shara Chaves, Carlos D'Apolito, Andres Diaz‐Jaramillo, Laura Diaz, Luisa Gomez, Mauricio León‐Carreño, Paula Lopera, Maria Alejandra Lopez, Priscila Lopez, Luke Mander, Jhonatan Martínez Murcia, Carlos Moreno, Enrique Moreno, Enrique Neyra, Brenda Orosco, Jhon Ortiz, Natalia Ossa, Natalia Ovalle, Carolina Ovalle, Angelo Plata, Ingrid Romero, Bruno Scudeiro, Silane A. F. da Silva Caminha, Axel Tejada‐Fajardo, Vinicius Do Valle, Thiago Wood   +37 more
wiley   +1 more source

Process length variation in cysts of a dinoflagellate, Lingulodinium machaerophorum, in surface sediments investigating its potential as salinity proxy.

, 2009
A biometrical analysis of the dinoflagellate cyst Lingulodinium machaerophorum [Deflandre, G., Cookson, I.C., 1955. Fossil microplankton from Australia late Mesozoic and Tertiary sediments. Australian journal of Marine and Freshwater Research 6: 242–313.]
Matsuoka, K., Mertens, K.N., Bouimetarhan, I., Ellegaard, M., Louwye, S., Leroy, S., Dale, B., Grosfjeld, K., Palaeoecology, Pospelova, V., van der Meer, M., Marret, F., Peña-Manjarrez, J.L., Sub Palaeoecology begr. 01-01-12, Vercauteren, D., Combourieu-Nebout, N., Ribeiro, S., Caner, H., Zonneveld, K.A.F., de Vernal, A., Holzwarth, U., Godhe, A., Filipova, M., Kotthoff, U., Mudie, P., Naudts, L., Persson, A., Sangiorgi, F., Vlassenbroeck, J., Popescu, S., Vink, A, Londeix, L.   +31 more
core   +1 more source

The late Holocene decline of Trapa natans L. in Northern Poland in the light of new palaeobotanical and geochemical data

Limnological Review, 2019
Trapa natans (water chestnut) is an aquatic, thermophilic plant whose decline has been observed in many localities in central Europe during the last decades. In this paper, we present a description of two new T. natans subfossil sites located outside its
Lewandowska Agnieszka, Niedzielski Przemysław, Gałka Mariusz   +2 more
doaj   +1 more source

Early evolutionary history of the seed

Biological Reviews, Volume 101, Issue 3, Page 1511-1553, June 2026.
ABSTRACT The seed is an essential stage in the life history of gymnospermous and angiospermous plants, facilitating both their survival and dispersal. We reappraise knowledge of the evolutionary history of the gymnospermous seed, from its origin in the late Devonian through to the well‐known end‐Permian extinctions – an interval encompassing the ...
Richard M. Bateman, Alan R. T. Spencer, Jason Hilton   +2 more
wiley   +1 more source