Results 91 to 100 of about 6,808 (260)

Rain Attenuation Prediction at Different Time Percentages for Ku, K, and Ka Bands Satellite Communication Systems over Nigeria

Journal of Astronomy and Space Sciences
This paper evaluates the influence of rainfall on propagated signal at different time exceedance percentages of an average year, over the climate zones of the country.
Orji Prince Orji, Obiegbuna Dominic Chukwuebuka, Okoro Eucharia Chidinma, Ugonabo Obiageli Josephine, Okezuonu Patrick Chinedu, Iyida Evaristus Uzochukwu, Ugwu Chukwuebuka Jude, Menteso Firew Meka, Ikechukwu Ugochukwu Chiemeka   +8 more
doaj   +1 more source

Using an unmanned aerial system to analyse environmental impacts of charcoal production on tropical savanna ecosystems in northwestern Kenya. [PDF]

Environ Monit Assess, 2022
Petersen M, Nüsser M.
europepmc   +1 more source

Social bees can enhance the persistence of plant–bee interactions during seasonal changes in seasonally dry tropical forests

Ecological Entomology, EarlyView.
Social bees, especially Meliponini, formed a persistent core that maintained plant–bee interactions across both dry and green seasons in the Caatinga. Persistence was not linked to broader diets; social bees used fewer plant species, despite availability, indicating selective tracking of temporally concentrated floral resources.
Ana Letícia S. Lima, Cândida M. L. Aguiar, Celso F. Martins, Emanuelle L. S. Brito   +3 more
wiley   +1 more source

Geographical distribution of the Pinnated Bittern (Botaurus pinnatus): Update and seasonal movement pattern

Ibis, EarlyView.
The Pinnated Bittern Botaurus pinnatus (Ardeidae) is a widely distributed Neotropical wading bird whose distribution and seasonal status remain poorly resolved. Discrepancies among published literature, citizen science records and the range currently assumed by BirdLife International indicate that both its geographical distribution and migratory ...
Helon Simões Oliveira, Tuany Siqueira‐Silva, Sérgio Roberto Posso, Sidney Feitosa Gouveia   +3 more
wiley   +1 more source

Utilizing traditional literature to triangulate the ecological history of a tropical savanna

People and Nature
The ecological history of tropical savannas remains a subject of intense debate and of high conservation relevance. Despite emerging evidence suggesting the antiquity of tropical savannas, the misconception that all tropical savannas are products of ...
Ashish N. Nerlekar, Digvijay Patil
doaj   +1 more source

Anthropogenic and natural factors are associated with bird dawn chorus onset in subtropical East Asia

Ibis, EarlyView.
Anthropogenic factors such as artificial lighting at night (ALAN) and natural factors including temperature and moonlight can affect the dawn chorus pattern in birds. However, most studies are conducted in temperate regions. We investigated the effect of anthropogenic and natural factors on dawn chorus timing in eight species of bird across Hong Kong ...
Ann W. Y. To, Sarah A. Collins
wiley   +1 more source

The influence of tropical grass species on soil nitrification and denitrification across savanna ecosystems

Geoderma
Although limited by nutrient-poor soils primary productivity in certain humid savannas can be as high as in tropical forests. This high productivity can be partly attributed to the ability of certain perennial grasses (Poaceae) to inhibit nitrification ...
William Galland, Amélie A.M. Cantarel, Sébastien Barot, Jean-Christophe Lata, Abigaïl Delort, Jonathan Gervaix, Audrey Niboyet, Lea Nosalova, Jacobo Arango, Niels Blaum, Corli Coetsee, Katja Geißler, Fulgence Kouamé Koffi, Marcel Konan, Yoan Marcangeli, Saïbou Nignan, Daniel M. Villegas, Benjamin J. Wigley, Lambiénou Yé, Xavier Le Roux, Alessandro Florio   +20 more
doaj   +1 more source

Protection status and environmental gradients shape butterfly assemblages in an East African tropical ecosystem

Insect Conservation and Diversity, EarlyView.
Observed butterfly richness was highest in moderately protected areas. During the dry season, vegetation productivity increased butterfly richness while human population density reduced it. Moderately protected areas supported high butterfly abundance and a high proportion of host‐specialist species.
Richard Alphonce Giliba, Jacqueline Loos, Konrad Fiedler   +2 more
wiley   +1 more source

The Effects of Castration, Implant Protocol, and Supplementation of Bos indicus-Influenced Beef Cattle under Tropical Savanna Conditions on Growth Performance, Carcass Characteristics, and Meat Quality. [PDF]

Animals (Basel), 2022
Huerta-Leidenz N, Jerez-Timaure N, Rodas-González A, Sarturi JO, Brashears MM, Miller MF, Brashears MT.   +6 more
europepmc   +1 more source

Fire‐driven forest degradation enhances termite activity and accelerates litter decomposition in the Amazonia rainforest

Insect Conservation and Diversity, EarlyView.
Forest degradation increased termite‐mediated litter decomposition, whereas no such effect was detected in undisturbed forests. Reduced ant predation and altered forest conditions were associated with higher termite abundance and faster litter decomposition.
Vanessa S. Ribeiro, José Henrique Schoereder, Tathiana G. Sobrinho, Paulo M. Brando, Filipe Viegas de Arruda, Ludmila Rattis, Og DeSouza, Márcia N. Macedo, Leonardo Maracahipes‐Santos, Lucas Navarro Paolucci   +9 more
wiley   +1 more source