Results 31 to 40 of about 1,178 (187)

Through the eyes of the Andean bear: Camera collar insights into the life of a threatened South American Ursid. [PDF]

Ecol Evol
This study used a camera‐equipped GPS collar on a male Andean bear in southeastern Peru, revealing rare behaviors like courtship, novel diets, and geophagy. These findings from the Kosñipata Valley provide valuable insights into the poorly understood ecology of Andean bears and suggest many areas for further research.
Pillco Huarcaya R, Whitworth A, Mamani N, Thomas M, Condori E.   +4 more
europepmc   +2 more sources

The Disposition of Trichopteris (Cyatheaceae)

American Fern Journal, 1987
The delimitation of genera and families has been a persistent problem in fern taxonomy, and the Cyatheaceae sensu stricto is no exception. Christensen (190506) adopted clearly artificial genera (Cyathea, Hemitelia, and Alsophila) based on complete (totally surrounding the sorus), partial, and absent indusia.
  +8 more sources

Apogamy in the Cyatheaceae [PDF]

Botanical Gazette, 1918
Since the discovery of apogamy in Pteris cretica by FARLOW (3) in I874, it has been observed in about I5 genera and 30 species of the Polypodiaceae. There are records of its occurrence in 3 other families of the Filicales, namely, the Osmundaceae, the Hymenophyllaceae, and the Marsiliaceae.
openaire   +1 more source

Ocorrência e distribuição de pteridófitas na reserva florestal Walter Egler, Amazônia Central, Brasil Occurrence and distribution of the pteridophytes in the Walter Egler Forest reserve, Central Amazonian, Brazil

Acta Amazonica, 2003
Na Reserva Florestal Walter Egler, localizada a 64 km de Manaus, no município de Rio Preto da Eva, foi investigada a ocorrência de Pteridófitas ao longo de uma toposseqüência. O grupo ocorre nos três ambientes observados na área (baixio, vertente e platô)
Maria Cristina de Souza, Jean-Louis Guillaumet, Izonete de Jesus Araujo Aguiar   +2 more
doaj   +1 more source

Conspecific Negative Distance‐Dependence and New Zealand Podocarp Forest Dynamics

Austral Ecology, Volume 51, Issue 9, September 2026.
ABSTRACT The Janzen‐Connell hypothesis proposed that conspecific negative density or distance dependence (CNDDD) helps maintain the species richness of tropical rainforests through the action of specialist natural enemies that suppress conspecific recruitment beneath canopy trees.
Christopher H. Lusk, Craig J. MacDonell, Selwyn R. June   +2 more
wiley   +1 more source

In vitro spore germination and gametophyte development of two Cyathea species of South America in response to nutrient media

Rodriguésia, 2023
Cyathea corcovadensis and Cyathea phalerata are tree ferns native to Brazil, endangered in the state of Rio Grande do Sul. Spore germination and gametophyte development in media with different nutrient formulations and activated charcoal were evaluated ...
Catiuscia Marcon, Verônica Kern de Lemos, Isabela Kirch Stein, Annette Droste   +3 more
doaj   +1 more source

First Record of Cyatheaceae in Uruguay

American Fern Journal, 2011
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Marquez, Gonzalo Javier, Brussa, Carlos A.   +1 more
openaire   +3 more sources

Vegetational Characteristics in Natural Habitat and Population Structure of the Endangered Plant Tigridiopalma Genus

Ecology and Evolution, Volume 16, Issue 4, April 2026.
First comprehensive ecological assessment of the endangered genus Tigridiopalma, covering two China endemic Plant Species with Extremely Small Populations (PSESP), T. magnifica and the newly described T. exalata. T. magnifica exhibits broader habitat diversity and understory resilience, while T.
Peishan Zou, Xirong Zheng, Shiou Yih Lee, Chunzhi Liu, Zhijun Xie, Ke Zheng, Guofeng Liu, Seping Dai   +7 more
wiley   +1 more source

Do you know Cyathea divergens (Cyatheaceae-Polypodiopsida)? 

, 2014
Lehnert, Marcus (2014): Do you know Cyathea divergens (Cyatheaceae-Polypodiopsida)? Phytotaxa 161 (1): 1-42, DOI: 10.11646/phytotaxa.161.1.1, URL: http://dx.doi.org/10.11646/phytotaxa.161.1.
Marcus Lehnert, Lehnert, Marcus
core   +1 more source

Wood density variation across an Andes‐to‐Amazon elevational gradient

Journal of Ecology, Volume 113, Issue 9, Page 2370-2385, September 2025.
We study how wood density varies along a 3500‐m elevational gradient, spanning from the Andean tree line to the Amazon basin. Our results reveal that wood density decreases from low to mid‐elevations, then increases toward the tree line. These patterns underscore the influence of species composition, life forms such as tree ferns, and local ...
William Farfan‐Rios, Sassan Saatchi, Imma Oliveras Menor, Yadvinder Malhi, Chelsea M. Robinson, Oliver L. Phillips, Alex Nina‐Quispe, Juan A. Gibaja, Israel Cuba, Karina Garcia‐Cabrera, Norma Salinas, John Terborgh, Nigel Pitman, Rodolfo Vasquez, Abel Monteagudo Mendoza, Percy Nunez Vargas, Craig A. Layman, Miles R. Silman   +17 more
wiley   +1 more source