Results 71 to 80 of about 14,754 (224)

Biotic carbon feedbacks in a materially-closed soil-vegetation-atmosphere system [PDF]

, 2012
The magnitude and direction of the coupled feedbacks between the biotic and abiotic components of the terrestrial carbon cycle is a major source of uncertainty in coupled climate–carbon-cycle models1, 2, 3.
BE Medlyn, E Ainsworth, FB Taub, GD Farquhar, J Charney, J Cohen, J Lawton, J Lloyd, J Morison, JA Subke, M Heimann, M Lukac, M Nelson, M Nelson, MV Wilson, N Nakicenovic, P Cadule, P Friedlingstein, P Friedlingstein, P Meir, R Knutti, R Wheeler, RDCR Team, T Hefin Jones, WF Dempster, WM Knott   +25 more
core   +1 more source

Seasonal variation in wild pig (Sus scrofa) diet revealed by DNA metabarcoding

Wildlife Society Bulletin, Volume 50, Issue 1, March 2026.
Using DNA metabarcoding of fecal samples, we investigated the diet of wild pigs at an extensive bottomland hardwood forest ecosystem within Felsenthal National Wildlife Refuge in Southern Arkansas. We found that wild pig diet was highly diverse and included at least 74 plant families and 106 genera and 23 species of vertebrates.
Kenneth C. Wilson, Scott J. Chiavacci, Caleb P. Roberts, Brett A. DeGregorio   +3 more
wiley   +1 more source

Reassessing climate and pre-Columbian drivers of paleofire activity in the Bolivian Amazon [PDF]

, 2017
A 50,000-year-old sediment core record from Laguna Chaplin is reanalyzed to explore potential paleoecological methods to detect the extent of pre-Columbian disturbance in the Bolivian Amazon.
Abbott, Ali, Baker, Baker, Bennett, Berglund, Blaauw, Blarquez, Brando, Bronwen S. Whitney, Brown, Brugger, Burbridge, Bush, Bush, Bush, Bush, Bush, Bush, Bush, Carson, Carson, Carson, Clement, Clement, Cochrane, Cochrane, Colinvaux, Cruz, DaSilva Meneses, Denevan, Dickau, Dickau, Downey, Erickson, Erickson, Erickson, Faegri, Francis E. Mayle, Gavin, Glaser, Goldberg, Hanagarth, Hanselman, Heckenberger, Heckenberger, Heckenberger, Heusser, Higuera, Higuera, Higuera, Hillyer, Hogg, Holst, Iriarte, Iriarte, Jonas Gregorio de Souza, Jose Iriarte, Kato, Killeen, Killeen, Killeen, Kleinman, Levis, Lombardo, Maezumi, Mann, Mann, Marlon, Marlon, Mayle, Mayle, McCormac, McMichael, McMichael, Mistry, Montes de Oca, Novello, Oguntunde, Piperno, Power, Power, Power, Pärssinen, Ramos-Neto, Ramsey, Roche, Rodionov, Rodionov, Rodionov, Roosevelt, S. Yoshi Maezumi, Seltzer, Shennan, Steiner, Stuiver, Taylor, Thomas, Timpson, Turner, Uhl, Urrego, Urrego, Urrego, Urrego, Valencia, Vuille, Walker, Whitlock, Whitlock, Whitney, Whitney, Whitney, Whitney, Willis, Zahid   +115 more
core   +3 more sources

Patterns of Tree Species Abundance and Diversity on Urban Sidewalks in Macapá, Amapá, Brazil

Ecological Research, Volume 41, Issue 2, March 2026.
This study presents the first systematic inventory of street trees in Macapá, Northeastern Brazilian Amazon. Results reveal a dominance of exotic and fruit‐bearing species, low tree density, and a replacement of large canopy trees by smaller ones, indicating potential losses in ecosystem services and the need for more biodiversity‐focused afforestation
Lorena Antunes Jimenez, Taíssa Barros Lobato Cambraia, Estefany Baia Furtado, Wegliane Campelo, Saulo Meneses Silvestre de Sousa, Laísa Maria Freire, Lúcio Royer Trujillo, Ricardo Angelo Pereira Lima, José Julio Toledo   +8 more
wiley   +1 more source

Aeropalynological aspects in the detection of the quality of air in Bratislava

Ekológia (Bratislava), 2013
This work is focused on mapping the aeropalynologic situation in the Bratislavan atmosphere. Volumetric pollen and pollen abortivity analyses were used for this purpose.
Dušička Jozef, Mičieta Karol, Brutovská Eva, Sámelová Andrea, Ščevková Jana, Zámečníková Mária, Terenová Alena   +6 more
doaj   +1 more source

Conhecendo espécies de plantas da Amazônia: imbaúba-vermelha (Cecropia palmata Willd. - Urticaceae). [PDF]

, 2013
bitstream/item/81613/1/Oriental-ComTec238 ...
CARVALHO, L. T. de, GAGLIOTI, A. L., GOMES, J. I., MARGALHO, L., MARTINS-DA-SILVA, R. C. V.   +4 more
core  

Late Holocene vegetation, fire, climate and upper forest line dynamics in the Podocarpus National Park, southeastern Ecuador [PDF]

, 2010
Late Holocene vegetation, fire, climate and upper forest line dynamics were studied based on detailed pollen and charcoal analyses. Two sediment cores, from the Rabadilla de Vaca mire (RVM) and the Valle Pequeo bog (VP), with an age of about 2100 and ...
B Geel Van, BCS Hansen, C Brunschön, C Brunschön, C Troll, C Weng, CH Dodson, E Beck, EC Grimm, Fernando Rodríguez, FO Sarmiento, G Miehe, G Pasquale Di, GA Islebe, H Behling, H Behling, H Niemann, H Niemann, H Niemann, H Niemann, H Walter, Hermann Behling, IPCC, J Bakker, J Bendix, J Bendix, J Guffroy, JR Flenley, JS Clark, JS Clark, JS Clark, M Kessler, M Litherland, M Richter, M Richter, M Richter, M Wille, MI Vélez, P Lozano, PA Colinvaux, R Marchant, R Marchant, R Van ‘t Veer, RW Bussmann, RW Bussmann, S Laegaard, SA Alchon, T Hammen Van der, T Hammen van der, V Markgraf   +49 more
core   +1 more source

Soil Properties and Plant Species Identity Independently Influence Arbuscular Mycorrhizal Fungal Composition Across Lowland Tropical Forests

Biotropica, Volume 58, Issue 2, March 2026.
We found that plant species identity and soil properties, especially soil phosphorus availability, independently structured arbuscular mycorrhizal fungal (AMF) community composition in tropical forests across central Panama. We also found that soil nutrient availability may mediate the interaction networks between plants and AMF. ABSTRACT Plant species
Mareli Sánchez‐Juliá, Blaine D. Martin, Iker R. Yturralde, Sunshine A. Van Bael   +3 more
wiley   +1 more source

Stemflow Dynamics in the Jamari National Forest (Brazilian Amazon): II. Solute Concentrations and Flux Dynamics

Biotropica, Volume 58, Issue 2, March 2026.
Trees can redirect large volumes of rainwater to the base of their stems. This stemflow not only redistributes water but also channels canopy‐derived solutes to the forest floor. Building on research showing canopy geometry and bark properties govern stemflow volumes, we examined how those same traits modulate the biogeochemical side of this flux. Over
Jeferson Alberto de Lima, John Toland Van Stan II, Karolina Lewińska, Agnieszka Dradrach, Jakub Ceglarek, Kelly Cristina Tonello   +5 more
wiley   +1 more source

Polen alergógeno en el aire de Huelva (SO de España) y su incidencia sobre la población alérgica [PDF]

, 1996
Se presenta un estudio sobre el polen alergógeno existente en el aire de Huelva y la incidencia de éste sobre la polinosis encontrada en esta localidad. Para realizar el análisis polínico se ha utilizado un captador tipo Cour instalado en el centro de la
Candau, Pilar, González Minero, Francisco José   +1 more
core   +2 more sources