Results 1 to 10 of about 49,044 (166)

Beyond trees: Mapping total aboveground biomass density in the Brazilian savanna using high-density UAV-lidar data

Forest Ecology and Management, 2021
Tropical savanna ecosystems play a major role in the seasonality of the global carbon cycle. However, their ability to store and sequester carbon is uncertain due to combined and intermingling effects of anthropogenic activities and climate change, which
CARLOS Alberto Silva, Eben N Broadbent, Midhun Mohan   +2 more
exaly   +2 more sources

Grass Species Flammability, Not Biomass, Drives Changes in Fire Behavior at Tropical Forest-Savanna Transitions

Frontiers in Forests and Global Change, 2018
Forest-savanna mosaics are maintained by fire-mediated positive feedbacks; whereby forest is fire suppressive and savanna is fire promoting. Forest-savanna transitions therefore represent the interface of opposing fire regimes.
Anabelle W Cardoso, Imma Oliveras Menor
exaly   +2 more sources

Double stress of waterlogging and drought drives forest–savanna coexistence

Proceedings of the National Academy of Sciences of the United States of America, 2023
Significance Explaining the distribution of vegetation is a long-standing challenge in ecology. In the tropics, forests have been associated with areas of high rainfall and low fire occurrence, while savannas dominate where rainfall is lower, and fire is
C. R. Mattos, M. Hirota, R. Oliveira, B. Flores, G. Miguez‐Macho, Y. Pokhrel, Ying Fan   +6 more
semanticscholar   +1 more source

Effects of insecticides and cultivars on panicle-feeding insect pest infestations and grain yield of sorghum (Sorghum bicolor (L.) Moench) in northern Ghana

Bulletin of the National Research Centre, 2021
Background Panicle-feeding insects are a challenge in sorghum (Sorghum bicolor (L.) Moench) cultivation but most farmers do not protect the crop. Here, the effects of pest management in different sorghum cultivars on grain yields and the financial ...
Jerry A. Nboyine, Kenneth Opare-Obuobi, Iddrisu Yahaya, Benjamin K. Badii, Francis Kusi, Asieku Yahaya, Gloria Adazebra   +6 more
doaj   +1 more source

The past, present, and future of herbivore impacts on savanna vegetation

Journal of Ecology, 2021
Herbivory is a key process structuring vegetation in savannas, especially in Africa where large mammal herbivore communities remain intact. Exclusion experiments consistently show that herbivores impact savanna vegetation, but effect size variation has ...
A. C. Staver, Joel O. Abraham, G. Hempson, A. Karp, J. Faith   +4 more
semanticscholar   +1 more source

Opportunities and challenges for savanna burning emissions abatement in southern Africa.

Journal of Environmental Management, 2021
Savanna fires occurring in sub-Saharan Africa account for over 60% of global fire extent, of which more than half occurs in the Southern Hemisphere contributing ~29% of global fire emissions.
J. Russell-Smith, Cameron P. Yates, R. Vernooij, T. Eames, G. R. van der Werf, N. Ribeiro, A. Edwards, Robin Beatty, Othusitse Lekoko, Jomo Mafoko, Catherine Monagle, S. Johnston   +11 more
semanticscholar   +1 more source

Assessment of the optimal frequency of insecticide sprays required to manage fall armyworm (Spodoptera frugiperda J.E Smith) in maize (Zea mays L.) in northern Ghana

CABI Agriculture and Bioscience, 2022
Background Insecticide use is an important component of integrated pest management strategies developed for fall armyworm (FAW), Spodoptera frugiperda J.E Smith, control in maize in many African countries.
Jerry A. Nboyine, Ebenezer Asamani, Lakpo K. Agboyi, Iddrisu Yahaya, Francis Kusi, Gloria Adazebra, Benjamin K. Badii   +6 more
doaj   +1 more source

Participatory On-Farm Evaluation of Improved Groundnut Genotypes in the Guinea Savannah Agro-Ecological Zone of Ghana

Agriculture, 2023
The on-farm mother–baby trial experimental approach was employed to evaluate the performance of elite groundnut genotypes on farmers’ fields in the Guinea savannah agroecology of Ghana in the 2020 and 2021 cropping seasons.
Ophelia Asirifi Amoako, Richard Oteng-Frimpong, Julius Yirzagla, Yussif Baba Kassim, Theophilus Kwabla Tengey, Desmond Sunday Adogoba, Mercy Mingle, Ramatu Alhassan, Abdul Aleem Ibrahim   +8 more
doaj   +1 more source

Mapping Three Decades of Changes in the Brazilian Savanna Native Vegetation Using Landsat Data Processed in the Google Earth Engine Platform

Remote Sensing, 2020
Widespread in the subtropics and tropics of the Southern Hemisphere, savannas are highly heterogeneous and seasonal natural vegetation types, which makes change detection (natural vs. anthropogenic) a challenging task.
A. Alencar, J. Shimbo, F. Lenti, C. Marques, Bárbara Zimbres, M. Rosa, Vera Arruda, Isabel Castro, João Paulo Fernandes Márcico Ribeiro, V. Varela, Isa Alencar, V. Piontekowski, V. Ribeiro, M. Bustamante, E. Sano, M. Barroso   +15 more
semanticscholar   +1 more source

Woody plant encroachment intensifies under climate change across tundra and savanna biomes

Global Ecology and Biogeography, 2020
Biomes worldwide are shifting under global change. Biomes whose extents are limited by temperature or precipitation, such as the tundra and savanna, may be particularly strongly affected by climate change.
M. García Criado, I. Myers-Smith, Anne D. Bjorkman, C. Lehmann, N. Stevens   +4 more
semanticscholar   +1 more source