Results 111 to 120 of about 17,840 (262)

Ammonia emissions from deciduous forest after leaf fall [PDF]

, 2013
The understanding of biochemical feedback mechanisms in the climate system is lacking knowledge in relation to bi-directional ammonia (NH3) exchange between natural ecosystems and the atmosphere.
Boegh, E., Geels, C., Hansen, K., Hertel, O., Jensen, B., Lund University., Skjoth, Carsten,, Sorensen, L. L.   +7 more
core   +4 more sources

Predation on Artificial Caterpillars Varies With Vertical Stratification but Not Light Gradients in a Sugar Maple Temperate Forest

Entomologia Experimentalis et Applicata, EarlyView.
Predation pressure varies vertically, with highest arthropod predation in the understory and highest bird predation in the canopy. Light availability differs across vertical strata, but predation patterns are more strongly influenced by height and forest structure than by light gradients.
Mahsa Hakimara, Emma Despland
wiley   +1 more source

Características morfogênicas e estruturais e produção de forragem do capim-marandu submetido a intensidades e freqüências de desfolhação Morphogenetic and structural traits and herbage production of marandugrass under intensities and frequencies of defoliation

Revista Brasileira de Zootecnia, 2006
Este trabalho foi realizado com o objetivo de avaliar a influência de intensidades (10 e 20 cm) e freqüências de desfolhação (três intervalos de cortes, definidos pelo aparecimento de 5, 7 e 9 folhas/perfilho após cada evento de desfolhação) nas ...
Kênia Régia Anasenko Marcelino, Domicio do Nascimento Junior, Sila Carneiro da Silva, Valéria Pacheco Batista Euclides, Dilermando Miranda da Fonseca   +4 more
doaj   +1 more source

A protracted phenology: Post‐diapause larval development of a threatened butterfly

Insect Conservation and Diversity, EarlyView.
Larval survival during diapause was high; hibernaculum webs were mostly located near Succisa pratensis plants, which often retained vital leaves through winter. Post‐diapause developmental time varied strongly depending on exposure to different microclimates, being reduced by litter cover, solar radiation and a higher heat load index.
Gwydion Scherer, Thomas Fartmann
wiley   +1 more source

Light interception, chemical, and productive characteristics of elephant grass subjected to different cutting intervals

Semina: Ciências Agrárias, 2019
This study aimed to evaluate the interception of light (%IL), leaf area index (LAI), and the chemical and productive characteristics of elephant grass (Pennisetum purpureum Schum) under different defoliation frequencies (30, 45, 60, 75, and 90 days after
Sâmara Stainy Cardoso Sânches, Rosane Cláudia Rodrigues, Ricardo Alves Araújo, Clésio dos Santos Costa, Franscisco Naysson Sousa Santos, Francisco Martins de Castro, Francirose Shigaki, Ivo Guilherme Ribeiro Araújo, Ivone Rodrigues Silva, Jocélio Santos Araújo   +9 more
doaj   +1 more source

Evaluating the impact of Hymenoscyphus fraxineus in Trentino (Alps, Northern Italy): first investigations [PDF]

, 2017
The spread of Hymenoscyphus fraxineus has been causing great concern regarding the survival of European ash (Fraxinus excelsior) throughout Europe since the 1990s.
Dal Maso, E, Giongo, S, Maresi, G., Montecchio, Lucio, Oliveira Longa, Cm   +4 more
core   +3 more sources

Characterisation of Sex Pheromone and Genetic Strain in Rachiplusia nu (Lepidoptera: Noctuidae) Populations Across Brazil

Journal of Applied Entomology, EarlyView.
ABSTRACT Rachiplusia nu, known as the sunflower looper (SFL) and belonging to the Plusiinae subfamily, is a major defoliator of soybeans, sunflowers and other horticultural crops across southern South America. This species has recently expanded to central and northern regions of Brazil, becoming a key soybean pest.
Leonardo Figueiredo, Diego B. Silva, Alan V. Saldanha, Alberto S. Corrêa, Aluska T. dos Santos, Paulo H. G. Zarbin   +5 more
wiley   +1 more source

The Penn State ORSER system for processing and analyzing ERTS and other MSS data [PDF]

The author has identified the following significant results. The office for Remote Sensing of Earth Resources (ORSER) of the Space Science and Engineering Laboratory at the Pennsylvania State University has developed an extensive operational system for ...
Borden, F. Y., Mcmurtry, G. J., Petersen, G. W., Weeden, H. A.   +3 more
core   +1 more source

A Framework for Unbiased Model Selection Based on Boosting [PDF]

, 2009
Variable selection and model choice are of major concern in many statistical applications, especially in high-dimensional regression models. Boosting is a convenient statistical method that combines model fitting with intrinsic model selection.
Hofner, Benjamin, Hothorn, Torsten, Kneib, Thomas, Schmid, Matthias   +3 more
core   +1 more source

Analysing the Ecological Requirements of the Australian Tortoise Beetle Trachymela sloanei (Blackburn, 1897) (Coleoptera: Chrysomelidae) to Determine the Prospects for Its Invasion Process

Journal of Applied Entomology, EarlyView.
ABSTRACT Invasive species pose a serious threat to biodiversity and result in significant economic costs. Although much effort is devoted to understanding invasive processes, some aspects are poorly understood, such as the early stages of invasions and the reasons for invasion failure.
Francisco Valera, Francisco Castaño‐Vázquez, Cesar Augusto Marchioro, Jesús Veiga   +3 more
wiley   +1 more source