Results 61 to 70 of about 244,552 (310)

Atmospheric CO2 consumption by continental erosion : present-day controls and implications for the last glacial maximum [PDF]

, 1998
The export of carbon from land to sea by rivers represents a major link in the global carbon cycle. For all principal carbon forms, the main factors that control the present-day fluxes at the global scale have been determined in order to establish global
Amiotte Suchet, Philippe, Ludwig, Wolfgang, Munhoven, Guy, Probst, Jean-Luc   +3 more
core   +2 more sources

Assessing the viability of genebanked seeds from rare, wild plants native to the United States using the D.E.A.D. paradigm

Applications in Plant Sciences, EarlyView.
Abstract Premise Genebanks must maintain viable seeds for decades. Seeds that germinate are clearly alive, but some seeds, often from wild populations, do not germinate because they are dormant, empty, aged, or damaged (D.E.A.D.). This work evaluates the effects of D.E.A.D.
Christina Walters, Lisa M. Hill, Katherine D. Heineman, Hannah M. Tetreault, Shaimaa Ibrahim, Katherine Markstein, Cheryl Birker, Kris Freitag, Dustin Wolkis, Michael Kunz, Sheila Murray, Nathaniel Kingsley, Alexandra Seglias, Nicholas Matsumoto, Thomas N. Kaye, Cheryl Peterson, Matthew A. Albrecht, Noah Dell, Stacy Anderson, Steve Blackwell, David Remucal, Wendy Gibble, Anita Tiller, Emily Coffey, Jason Ligon, Laurie Blackmore, Carrie Radcliffe, Heather E. Schneider, Kristen Nelson, David Sollenberger, Jessamine Finch, Kate Wellspring, Robert Jetton, Joyce Maschinski   +33 more
wiley   +1 more source

Data on heavy metals content and biochar toxicity in a pristine tropical agricultural soil

Data in Brief, 2018
Accumulation of heavy metals results in soil degradation and impairs the normal functioning of ecosystems. Thus, monitoring of heavy metals is essential in both pristine and polluted soils.
Ihuoma N. Anyanwu, Moses N. Alo, Amos M. Onyekwere, John D. Crosse, Okoro Nworie, Clementina U. Uwa, Md. Faruque Hossain   +6 more
doaj   +1 more source

Morphological variation in atlas and axis of Neotropical spiny rats (Rodentia, Echimyidae)

The Anatomical Record, EarlyView.
Abstract The unique morphologies of the first two cervical vertebrae, the atlas and axis, represent a significant innovation in mammalian evolution. These structures support the weight of the head and enable intricate movements of the head and neck.
Thomas Furtado da Silva Netto, João Felipe Leal Kaiuca, Adriana Itatí Olivares, William Corrêa Tavares   +3 more
wiley   +1 more source

Listening to tropical forest soils

Ecological Indicators
Acoustic monitoring has proven to be an effective tool for monitoring biotic soundscapes in the marine, terrestrial, and aquatic realms. Recently it has been suggested that it could also be an effective method for monitoring soil soundscapes, but has ...
Oliver C. Metcalf, Fabricio Baccaro, Jos Barlow, Erika Berenguer, Tom Bradfer-Lawrence, Liana Chesini Rossi, Érica Marinho do Vale, Alexander C. Lees   +7 more
doaj   +1 more source

Under the Shade of a Coolabah Tree: A Second Cache of Tulas From the Boulia District, Western Queensland

Archaeology in Oceania, EarlyView.
ABSTRACT This paper reports on the excavation of a cache of stone artefacts, buried on the bank of a waterhole or ‘billabong’ in central western Queensland. This is an extremely rare find, and yet it is the second such site to be reported within less than a 10 km radius.
Yinika L. Perston, Lynley A. Wallis, Heather Burke, Lorna Bogdanek, Trevina Rogers, Justine Kemp   +5 more
wiley   +1 more source

Mapping soils in two watersheds using legacy data and extrapolation for similar surrounding areas

Ciência e Agrotecnologia
Existing soil maps (legacy data) associated with digital mapping techniques are alternatives to obtain information at lower costs, however, tests are required to do it more efficiently. This study had as objectives to compare different methods to extract
Marcelo Henrique Procópio Pelegrino, Sérgio Henrique Godinho Silva, Michele Duarte de Menezes, Elidiane da Silva, Phillip Ray Owens, Nilton Curi   +5 more
doaj   +1 more source

Soil structural degradation and nutrient limitations across land use categories and climatic zones in Southern Africa [PDF]

, 2019
Although soil degradation is a major threat to food security and carbon sequestration, our knowledge of the spatial extent of the problem and its drivers is very limited in Southern Africa.
Kihara, Job, Mponela, Powell, Ndengu, Gift, Sila, Andrew M., Sileshi, Gudeta W., Tamene, Lulseged, Tondoh, Jérôme E.   +6 more
core   +1 more source

Zooarchaeological Analysis of an Atoll Assemblage From Central Micronesia

Archaeology in Oceania, EarlyView.
ABSTRACT There has been a dearth of archaeological research on atolls in the central‐eastern Caroline Islands of Micronesia. This has limited our understanding of pre‐contact subsistence and settlement strategies in these more marginal and remote environments, particularly in regards to zooarchaeological data.
Philippa Jorissen, Gabriel Sanchez, Scott M. Fitzpatrick   +2 more
wiley   +1 more source

Phosphorus availability as a function of its time of contact with different soils

Revista Brasileira de Engenharia Agrícola e Ambiental
Phosphorus (P) availability is related to soil sorption capacity and is relevant to planning P fertilization and evaluating its residual effect. The aim of this work was to evaluate the P availability to maize plants after different incubation times of ...
Hemmannuella C. Santos, Fábio H. T. de Oliveira, Adailson P. de Souza, Ignácio H. Salcedo, Valério D. M. Silva   +4 more
doaj   +1 more source