Results 61 to 70 of about 63,698 (307)

Global assessment of nitrogen deposition effects on terrestrial plant diversity : a synthesis [PDF]

, 2009
Atmospheric nitrogen (N) deposition is it recognized threat to plant diversity ill temperate and northern parts of Europe and North America. This paper assesses evidence from field experiments for N deposition effects and thresholds for terrestrial plant
Alkemade, R., Ashmore, M., Bobbink, R., Bustamante, M., Cinderby, S., Davidson, E., De Vries, W., Dentener, F., Emmett, B., Erisman, J. -W., Fenn, M., Galloway, J., Gilliam, F., Hicks, K., Nordin, A., Pardo, L., Spranger, T.   +16 more
core   +7 more sources

State‐Level Politics in Forest Governance: The Role of the Narrative‐Policy Nexus in the Brazilian Amazon

Environmental Policy and Governance, EarlyView.
ABSTRACT Deforestation and its social impacts are an enduring challenge in agrarian frontiers, especially in the tropics. Fueled by global demand for commodities, this process is mediated by ideas, concepts, meanings, and policies that uphold socioenvironmental degradation. A key and understudied—arena in which this mediation occurs is the sub‐national
Gabriela Russo Lopes, Fabio de Castro
wiley   +1 more source

First assessment of the plant phenology index (PPI) for estimating gross primary productivity in African semi-arid ecosystems

, 2019
The importance of semi-arid ecosystems in the global carbon cycle as sinks for CO2 emissions has recently been highlighted. Africa is a carbon sink and nearly half its area comprises arid and semi-arid ecosystems.
Abdi, A. M., Ardo, J., Boke-Olen, N., Eklundh, L., Jin, H., Lehsten, V., Tagesson, T.   +6 more
core   +1 more source

Temperature Coefficient Analysis of Polycrystalline PV Modules Under Field Conditions in Ghana

Energy Science &Engineering, EarlyView.
Field measurements from a commercial PV plant in Ghana show polycrystalline module temperature coefficients of −0.473%/°C—31% higher than manufacturer values—highlighting the risk of underestimating energy losses and degradation in fast‐growing West African solar deployments.
Emmanuel Akono Sarsah, Abdul‐Rahim Bawa   +1 more
wiley   +1 more source

Temporal changes in species composition, diversity, and woody vegetation structure of savannas in the Cerrado-Amazon transition zone

Acta Botânica Brasílica, 2018
Vegetation in the transition between tropical forest and savanna is hyperdynamic and there is evidence that in the absence of fire, forest advances over savanna.
Leonardo Maracahipes-Santos, Josias Oliveira dos Santos, Simone Matias Reis, Eddie Lenza   +3 more
doaj   +1 more source

Resource partitioning among African savanna herbivores in North Cameroon: the importance of diet composition, food quality and body mass [PDF]

, 2011
The relationship between herbivore diet quality, and diet composition (the range of food plants consumed) and body mass on resource partitioning of herbivores remains the subject of an ongoing scientific debate.
Brunsting, A.M.H., Goethem, J., Iongh, H.H., de, Jong, C.B., de, Klop, E., Loth, P.E., Prins, H.H.T.   +6 more
core   +2 more sources

How Well Do CMIP6 Models Simulate the Influence of the West African Westerly Jet on Sahel Precipitation?

International Journal of Climatology, EarlyView.
Climate models generally reproduce the WAWJ and August peak but simulate its onset prematurely and too strongly relative to ERA5. CMIP6 simulations struggle to reproduce the jet–precipitation relationship in the Sahel and underrepresent associated moisture transports.
Akintunde I. Makinde, Babatunde J. Abiodun, Rachel James, Richard Washington, Ellen Dyer, Tom Webb   +5 more
wiley   +1 more source

Biochar‐Induced Shifts in Fungal Community Structure and Their Association With Soil Physical Properties in Degraded Soil From the Brazilian Semiarid

Land Degradation &Development, EarlyView.
ABSTRACT Soil degradation compromises ecosystem functioning. Biochar, a carbon‐rich amendment, has gained attention as a promising strategy to enhance soil structure and restore microbial balance. This study investigated the effects of two biochars, cashew bagasse biochar (CBB) and a co‐pyrolyzed biochar produced from sewage sludge and cashew pruning ...
João Marcos Rodrigues dos Santos, Arthur Prudêncio de Araujo Pereira, Kaio Gráculo Vieira Garcia, Ícaro Vasconcelos do Nascimento, Francisco Luan Almeida Barbosa, Tiago da Costa Dantas Moniz, Gilvanete da Silva Henrique, Murilo de Sousa Almeida, Vania Maria Maciel Melo, Mirian Cristina Gomes Costa, Helon Hébano de Freitas Sousa, Adriana Guirado Artur, Christiana de Fátima Bruce da Silva, Odair Pastor Ferreira, Antônio Gomes de Souza Filho, Erika Valente de Medeiros, Ademir Sergio Ferreira Araujo, Rafael Santiago da Costa, Jaedson Cláudio Anunciato Mota   +18 more
wiley   +1 more source

Niche-dependent forest and savanna fragmentation in Tropical South America during the Last Glacial Maximum

npj Biodiversity
The refugia hypothesis, often used to explain Amazonia’s high biodiversity, initially received ample support but has garnered increasing criticism over time.
Douglas I. Kelley, Hiromitsu Sato, Michaela Ecker, Chantelle A. Burton, João M. G. Capurucho, John Bates   +5 more
doaj   +1 more source

Dicrananthera hedyotidea C. Presl. (Melastomataceae) in Maranhão state, Brazil: first record and ecological niche model of the species

Nordic Journal of Botany, EarlyView.
Dicrananthera C. Presl. is a monospecific genus of the tribe Marcetieae, comprising perennial herbs typically occurring in areas adjacent to wetlands. The species exhibits a disjunct distribution, with confirmed records in both the Amazon and Atlantic Forest domains.
Elias Julio Oliveira Correa, Sandro Márcio dos Santos Junior, Antônio Fernando Costa da Silva, Kalynne Nayara Lima dos Santos, Eduardo Bezerra de Almeida Jr   +4 more
wiley   +1 more source